[UI] Add Notes feature. (#99)

* [DB] Add Room schema export location.

* [DB] Add Note entity and migration 96.

* Add correct database schema

* [Notes] Implement basic note list UI.

* [DB] Implement Noteable in Full entities. Add note relation and filtering.

* [Notes] Make Note searchable.

* [UI] Disable onClick listeners in adapters when null.

* [UI] Implement showing note list in dialog.

* [UI] Update note dialogs UI.

* [Notes] Add note details dialog.

* [Notes] Extract note dialogs header into a separate layout.

* [Notes] Add note editor dialog.

* [Notes] Show note icons in dialogs and lists.

* [Notes] Add showing substitute text.

* [Notes] Add replacing notes icon.

* [Notes] Add sharing and receiving notes.

* [Notes] Add notes list UI fragment.

* [Notes] Implement adding notes without owner.

* [Notes] Add color names.

* [Notes] Add notes card on home screen.

* [Notes] Add notes card migration.

app/build.gradle

@@ -31,6 +31,12 @@ android {
                 cppFlags "-std=c++11"
             }
         }
+
+        kapt {
+            arguments {
+                arg("room.schemaLocation", "$projectDir/schemas")
+            }
+        }
     }
 
     buildTypes {

app/src/main/java/pl/szczodrzynski/edziennik/App.kt

@@ -35,6 +35,7 @@ import okhttp3.OkHttpClient
 import org.greenrobot.eventbus.EventBus
 import pl.szczodrzynski.edziennik.config.Config
 import pl.szczodrzynski.edziennik.data.api.events.ProfileListEmptyEvent
+import pl.szczodrzynski.edziennik.data.api.szkolny.SzkolnyApi
 import pl.szczodrzynski.edziennik.data.api.szkolny.interceptor.Signing
 import pl.szczodrzynski.edziennik.data.db.AppDb
 import pl.szczodrzynski.edziennik.data.db.entity.Profile
@@ -66,6 +67,7 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
         var devMode = false
     }
 
+    val api by lazy { SzkolnyApi(this) }
     val notificationChannelsManager by lazy { NotificationChannelsManager(this) }
     val userActionManager by lazy { UserActionManager(this) }
     val gradesManager by lazy { GradesManager(this) }
@@ -77,6 +79,7 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
     val availabilityManager by lazy { AvailabilityManager(this) }
     val textStylingManager by lazy { TextStylingManager(this) }
     val messageManager by lazy { MessageManager(this) }
+    val noteManager by lazy { NoteManager(this) }
 
     val db
         get() = App.db

app/src/main/java/pl/szczodrzynski/edziennik/Binding.kt

@@ -4,8 +4,11 @@
 package pl.szczodrzynski.edziennik
 
 import android.graphics.Paint
+import android.view.View
 import android.widget.TextView
+import androidx.core.view.isVisible
 import androidx.databinding.BindingAdapter
+import pl.szczodrzynski.edziennik.ext.dp
 
 object Binding {
     @JvmStatic
@@ -17,4 +20,64 @@ object Binding {
             textView.paintFlags = textView.paintFlags and Paint.STRIKE_THRU_TEXT_FLAG.inv()
         }
     }
+
+    @JvmStatic
+    @BindingAdapter("android:isVisible")
+    fun isVisible(view: View, isVisible: Boolean) {
+        view.isVisible = isVisible
+    }
+
+    private fun resizeDrawable(textView: TextView, index: Int, size: Int) {
+        val drawables = textView.compoundDrawables
+        drawables[index]?.setBounds(0, 0, size, size)
+        textView.setCompoundDrawables(drawables[0], drawables[1], drawables[2], drawables[3])
+    }
+
+    @JvmStatic
+    @BindingAdapter("android:drawableLeftAutoSize")
+    fun drawableLeftAutoSize(textView: TextView, enable: Boolean) = resizeDrawable(
+        textView,
+        index = 0,
+        size = textView.textSize.toInt(),
+    )
+
+    @JvmStatic
+    @BindingAdapter("android:drawableRightAutoSize")
+    fun drawableRightAutoSize(textView: TextView, enable: Boolean) = resizeDrawable(
+        textView,
+        index = 2,
+        size = textView.textSize.toInt(),
+    )
+
+    @JvmStatic
+    @BindingAdapter("android:drawableLeftSize")
+    fun drawableLeftSize(textView: TextView, sizeDp: Int) = resizeDrawable(
+        textView,
+        index = 0,
+        size = sizeDp.dp,
+    )
+
+    @JvmStatic
+    @BindingAdapter("android:drawableTopSize")
+    fun drawableTopSize(textView: TextView, sizeDp: Int) = resizeDrawable(
+        textView,
+        index = 1,
+        size = sizeDp.dp,
+    )
+
+    @JvmStatic
+    @BindingAdapter("android:drawableRightSize")
+    fun drawableRightSize(textView: TextView, sizeDp: Int) = resizeDrawable(
+        textView,
+        index = 2,
+        size = sizeDp.dp,
+    )
+
+    @JvmStatic
+    @BindingAdapter("android:drawableBottomSize")
+    fun drawableBottomSize(textView: TextView, sizeDp: Int) = resizeDrawable(
+        textView,
+        index = 3,
+        size = sizeDp.dp,
+    )
 }

app/src/main/java/pl/szczodrzynski/edziennik/MainActivity.kt

@@ -72,6 +72,7 @@ import pl.szczodrzynski.edziennik.ui.login.LoginActivity
 import pl.szczodrzynski.edziennik.ui.messages.compose.MessagesComposeFragment
 import pl.szczodrzynski.edziennik.ui.messages.list.MessagesFragment
 import pl.szczodrzynski.edziennik.ui.messages.single.MessageFragment
+import pl.szczodrzynski.edziennik.ui.notes.NotesFragment
 import pl.szczodrzynski.edziennik.ui.notifications.NotificationsListFragment
 import pl.szczodrzynski.edziennik.ui.settings.ProfileManagerFragment
 import pl.szczodrzynski.edziennik.ui.settings.SettingsFragment
@@ -118,6 +119,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         const val DRAWER_ITEM_NOTIFICATIONS = 20
         const val DRAWER_ITEM_MORE = 21
         const val DRAWER_ITEM_TEACHERS = 22
+        const val DRAWER_ITEM_NOTES = 23
         const val DRAWER_ITEM_SETTINGS = 101
         const val DRAWER_ITEM_DEBUG = 102
 
@@ -134,6 +136,13 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             val list: MutableList<NavTarget> = mutableListOf()
             val moreList: MutableList<NavTarget> = mutableListOf()
 
+            moreList += NavTarget(
+                id = DRAWER_ITEM_NOTES,
+                name = R.string.menu_notes,
+                fragmentClass = NotesFragment::class)
+                .withIcon(CommunityMaterial.Icon3.cmd_text_box_multiple_outline)
+                .isStatic(true)
+
             moreList += NavTarget(DRAWER_ITEM_TEACHERS,
                 R.string.menu_teachers,
                 TeachersListFragment::class)

app/src/main/java/pl/szczodrzynski/edziennik/config/ProfileConfig.kt

@@ -18,7 +18,7 @@ import kotlin.coroutines.CoroutineContext
 
 class ProfileConfig(val db: AppDb, val profileId: Int, rawEntries: List<ConfigEntry>) : CoroutineScope, AbstractConfig {
     companion object {
-        const val DATA_VERSION = 2
+        const val DATA_VERSION = 3
     }
 
     private val job = Job()

app/src/main/java/pl/szczodrzynski/edziennik/config/utils/ProfileConfigMigration.kt

@@ -7,6 +7,8 @@ package pl.szczodrzynski.edziennik.config.utils
 import pl.szczodrzynski.edziennik.config.ProfileConfig
 import pl.szczodrzynski.edziennik.data.db.entity.Notification
 import pl.szczodrzynski.edziennik.data.db.entity.Profile.Companion.AGENDA_DEFAULT
+import pl.szczodrzynski.edziennik.ui.home.HomeCard
+import pl.szczodrzynski.edziennik.ui.home.HomeCardModel
 import pl.szczodrzynski.edziennik.utils.managers.GradesManager.Companion.COLOR_MODE_WEIGHTED
 import pl.szczodrzynski.edziennik.utils.managers.GradesManager.Companion.YEAR_ALL_GRADES
 
@@ -33,5 +35,13 @@ class ProfileConfigMigration(config: ProfileConfig) {
 
             dataVersion = 2
         }
+
+        if (dataVersion < 3) {
+            ui.homeCards = ui.homeCards.toMutableList().also {
+                it.add(HomeCardModel(config.profileId, HomeCard.CARD_NOTES))
+            }
+
+            dataVersion = 3
+        }
     }}
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/SzkolnyApi.kt

@@ -23,10 +23,7 @@ import pl.szczodrzynski.edziennik.data.api.szkolny.interceptor.SignatureIntercep
 import pl.szczodrzynski.edziennik.data.api.szkolny.interceptor.Signing
 import pl.szczodrzynski.edziennik.data.api.szkolny.request.*
 import pl.szczodrzynski.edziennik.data.api.szkolny.response.*
-import pl.szczodrzynski.edziennik.data.db.entity.Event
+import pl.szczodrzynski.edziennik.data.db.entity.*
-import pl.szczodrzynski.edziennik.data.db.entity.FeedbackMessage
-import pl.szczodrzynski.edziennik.data.db.entity.Notification
-import pl.szczodrzynski.edziennik.data.db.entity.Profile
 import pl.szczodrzynski.edziennik.data.db.full.EventFull
 import pl.szczodrzynski.edziennik.ext.keys
 import pl.szczodrzynski.edziennik.ext.md5
@@ -199,7 +196,12 @@ class SzkolnyApi(val app: App) : CoroutineScope {
     }
 
     @Throws(Exception::class)
-    fun getEvents(profiles: List<Profile>, notifications: List<Notification>, blacklistedIds: List<Long>, lastSyncTime: Long): List<EventFull> {
+    fun getEvents(
+        profiles: List<Profile>,
+        notifications: List<Notification>,
+        blacklistedIds: List<Long>,
+        lastSyncTime: Long,
+    ): Pair<List<EventFull>, List<Note>> {
         val teams = app.db.teamDao().allNow
 
         val users = profiles.mapNotNull { profile ->
@@ -225,7 +227,7 @@ class SzkolnyApi(val app: App) : CoroutineScope {
                 lastSync = lastSyncTime,
                 notifications = notifications.map { ServerSyncRequest.Notification(it.profileName ?: "", it.type, it.text) }
         )).execute()
-        val (events, hasBrowsers) = parseResponse(response, updateDeviceHash = true)
+        val (events, notes, hasBrowsers) = parseResponse(response, updateDeviceHash = true)
 
         hasBrowsers?.let {
             app.config.sync.webPushEnabled = it
@@ -237,6 +239,7 @@ class SzkolnyApi(val app: App) : CoroutineScope {
         }
 
         val eventList = mutableListOf<EventFull>()
+        val noteList = mutableListOf<Note>()
 
         events.forEach { event ->
             // skip blacklisted events
@@ -247,9 +250,13 @@ class SzkolnyApi(val app: App) : CoroutineScope {
             if (event.color == -1)
                 event.color = null
 
+            val eventSharedBy = event.sharedBy
+
             // create the event for every matching team and profile
             teams.filter { it.code == event.teamCode }.onEach { team ->
                 val profile = profiles.firstOrNull { it.id == team.profileId } ?: return@onEach
+                if (!profile.canShare)
+                    return@forEach
 
                 eventList += EventFull(event).apply {
                     profileId = team.profileId
@@ -261,42 +268,107 @@ class SzkolnyApi(val app: App) : CoroutineScope {
                     if (profile.userCode == event.sharedBy) {
                         sharedBy = "self"
                         addedManually = true
+                    } else {
+                        sharedBy = eventSharedBy
                     }
                 }
             }
         }
 
-        return eventList
+        notes.forEach { note ->
+            val noteSharedBy = note.sharedBy
+
+            // create the note for every matching team and profile
+            teams.filter { it.code == note.teamCode }.onEach { team ->
+                val profile = profiles.firstOrNull { it.id == team.profileId } ?: return@onEach
+                if (!profile.canShare)
+                    return@forEach
+                note.profileId = team.profileId
+                if (profile.userCode == note.sharedBy) {
+                    note.sharedBy = "self"
+                } else {
+                    note.sharedBy = noteSharedBy
+                }
+
+                if (app.noteManager.hasValidOwner(note))
+                    noteList += note
+            }
+        }
+        return eventList to noteList
     }
 
     @Throws(Exception::class)
     fun shareEvent(event: EventFull) {
+        val profile = app.db.profileDao().getByIdNow(event.profileId)
+            ?: throw NullPointerException("Profile is not found")
         val team = app.db.teamDao().getByIdNow(event.profileId, event.teamId)
+            ?: throw NullPointerException("Team is not found")
 
         val response = api.shareEvent(EventShareRequest(
-                deviceId = app.deviceId,
+            deviceId = app.deviceId,
-                device = getDevice(),
+            device = getDevice(),
-                sharedByName = event.sharedByName,
+            userCode = profile.userCode,
-                shareTeamCode = team.code,
+            studentNameLong = profile.studentNameLong,
-                event = event
+            shareTeamCode = team.code,
+            event = event
         )).execute()
         parseResponse(response, updateDeviceHash = true)
     }
 
     @Throws(Exception::class)
     fun unshareEvent(event: Event) {
+        val profile = app.db.profileDao().getByIdNow(event.profileId)
+            ?: throw NullPointerException("Profile is not found")
         val team = app.db.teamDao().getByIdNow(event.profileId, event.teamId)
+            ?: throw NullPointerException("Team is not found")
 
         val response = api.shareEvent(EventShareRequest(
-                deviceId = app.deviceId,
+            deviceId = app.deviceId,
-                device = getDevice(),
+            device = getDevice(),
-                sharedByName = event.sharedByName,
+            userCode = profile.userCode,
-                unshareTeamCode = team.code,
+            studentNameLong = profile.studentNameLong,
-                eventId = event.id
+            unshareTeamCode = team.code,
+            eventId = event.id
         )).execute()
         parseResponse(response, updateDeviceHash = true)
     }
 
+    @Throws(Exception::class)
+    fun shareNote(note: Note) {
+        val profile = app.db.profileDao().getByIdNow(note.profileId)
+            ?: throw NullPointerException("Profile is not found")
+        val team = app.db.teamDao().getClassNow(note.profileId)
+            ?: throw NullPointerException("TeamClass is not found")
+
+        val response = api.shareNote(NoteShareRequest(
+            deviceId = app.deviceId,
+            device = getDevice(),
+            userCode = profile.userCode,
+            studentNameLong = profile.studentNameLong,
+            shareTeamCode = team.code,
+            note = note,
+        )).execute()
+        parseResponse(response)
+    }
+
+    @Throws(Exception::class)
+    fun unshareNote(note: Note) {
+        val profile = app.db.profileDao().getByIdNow(note.profileId)
+            ?: throw NullPointerException("Profile is not found")
+        val team = app.db.teamDao().getClassNow(note.profileId)
+            ?: throw NullPointerException("TeamClass is not found")
+
+        val response = api.shareNote(NoteShareRequest(
+            deviceId = app.deviceId,
+            device = getDevice(),
+            userCode = profile.userCode,
+            studentNameLong = profile.studentNameLong,
+            unshareTeamCode = team.code,
+            noteId = note.id,
+        )).execute()
+        parseResponse(response)
+    }
+
     /*fun eventEditRequest(requesterName: String, event: Event): ApiResponse<Nothing>? {
 
     }*/

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/SzkolnyService.kt

@@ -18,6 +18,9 @@ interface SzkolnyService {
     @POST("share")
     fun shareEvent(@Body request: EventShareRequest): Call<ApiResponse<Unit>>
 
+    @POST("share")
+    fun shareNote(@Body request: NoteShareRequest): Call<ApiResponse<Unit>>
+
     @POST("webPush")
     fun webPush(@Body request: WebPushRequest): Call<ApiResponse<WebPushResponse>>
 

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/request/EventShareRequest.kt

@@ -12,8 +12,9 @@ data class EventShareRequest (
 
         val action: String = "event",
 
-        /* If null, the server shows an error */
+        val userCode: String,
-        val sharedByName: String?,
+        val studentNameLong: String,
+
         val shareTeamCode: String? = null,
         val unshareTeamCode: String? = null,
         val requesterName: String? = null,

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/request/NoteShareRequest.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-26.
+ */
+
+package pl.szczodrzynski.edziennik.data.api.szkolny.request
+
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+
+data class NoteShareRequest (
+    val deviceId: String,
+    val device: Device? = null,
+
+    val action: String = "note",
+
+    val userCode: String,
+    val studentNameLong: String,
+
+    val shareTeamCode: String? = null,
+    val unshareTeamCode: String? = null,
+    val requesterName: String? = null,
+
+    val noteId: Long? = null,
+    val note: Note? = null
+)
+

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/response/ServerSyncResponse.kt

@@ -4,9 +4,11 @@
 
 package pl.szczodrzynski.edziennik.data.api.szkolny.response
 
+import pl.szczodrzynski.edziennik.data.db.entity.Note
 import pl.szczodrzynski.edziennik.data.db.full.EventFull
 
 data class ServerSyncResponse(
         val events: List<EventFull>,
+        val notes: List<Note>,
         val hasBrowsers: Boolean? = null
 )

app/src/main/java/pl/szczodrzynski/edziennik/data/api/task/AppSync.kt

@@ -30,7 +30,7 @@ class AppSync(val app: App, val notifications: MutableList<Notification>, val pr
      */
     fun run(lastSyncTime: Long, markAsSeen: Boolean = false): Int {
         val blacklistedIds = app.db.eventDao().blacklistedIds
-        val events = try {
+        val (events, notes) = try {
             api.getEvents(profiles, notifications, blacklistedIds, lastSyncTime)
         } catch (e: SzkolnyApiException) {
             if (e.toErrorCode() == ERROR_API_INVALID_SIGNATURE)
@@ -40,6 +40,10 @@ class AppSync(val app: App, val notifications: MutableList<Notification>, val pr
 
         app.config.sync.lastAppSync = System.currentTimeMillis()
 
+        if (notes.isNotEmpty()) {
+            app.db.noteDao().addAll(notes)
+        }
+
         if (events.isNotEmpty()) {
             val today = Date.getToday()
             app.db.metadataDao().addAllIgnore(events.map { event ->
@@ -54,6 +58,6 @@ class AppSync(val app: App, val notifications: MutableList<Notification>, val pr
             })
             return app.db.eventDao().upsertAll(events).size
         }
-        return 0;
+        return 0
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/task/SzkolnyTask.kt

@@ -31,7 +31,7 @@ class SzkolnyTask(val app: App, val syncingProfiles: List<Profile>) : IApiTask(-
         val notifications = Notifications(app, notificationList, profiles)
         notifications.run()
 
-        val appSyncProfiles = profiles.filter { it.registration == Profile.REGISTRATION_ENABLED && !it.archived }
+        val appSyncProfiles = profiles.filter { it.canShare }
         // App Sync conditions:
         //    - every 24 hours && any profile is registered
         //    - if there are new notifications && any browser is paired

app/src/main/java/pl/szczodrzynski/edziennik/data/db/AppDb.kt

@@ -42,8 +42,9 @@ import pl.szczodrzynski.edziennik.data.db.migration.*
     ConfigEntry::class,
     LibrusLesson::class,
     TimetableManual::class,
+    Note::class,
     Metadata::class
-], version = 96)
+], version = 97)
 @TypeConverters(
         ConverterTime::class,
         ConverterDate::class,
@@ -82,6 +83,7 @@ abstract class AppDb : RoomDatabase() {
     abstract fun configDao(): ConfigDao
     abstract fun librusLessonDao(): LibrusLessonDao
     abstract fun timetableManualDao(): TimetableManualDao
+    abstract fun noteDao(): NoteDao
     abstract fun metadataDao(): MetadataDao
 
     companion object {
@@ -182,6 +184,7 @@ abstract class AppDb : RoomDatabase() {
                 Migration94(),
                 Migration95(),
                 Migration96(),
+                Migration97(),
         ).allowMainThreadQueries().build()
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/dao/BaseDao.kt

@@ -12,15 +12,19 @@ import pl.szczodrzynski.edziennik.data.db.entity.Keepable
 
 @Dao
 interface BaseDao<T : Keepable, F : T> {
+    @Transaction
     @RawQuery
     fun getRaw(query: SupportSQLiteQuery): LiveData<List<F>>
     fun getRaw(query: String) = getRaw(SimpleSQLiteQuery(query))
+    @Transaction
     @RawQuery
     fun getOne(query: SupportSQLiteQuery): LiveData<F?>
     fun getOne(query: String) = getOne(SimpleSQLiteQuery(query))
+    @Transaction
     @RawQuery
     fun getRawNow(query: SupportSQLiteQuery): List<F>
     fun getRawNow(query: String) = getRawNow(SimpleSQLiteQuery(query))
+    @Transaction
     @RawQuery
     fun getOneNow(query: SupportSQLiteQuery): F?
     fun getOneNow(query: String) = getOneNow(SimpleSQLiteQuery(query))

app/src/main/java/pl/szczodrzynski/edziennik/data/db/dao/NoteDao.kt

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-23.
+ */
+
+package pl.szczodrzynski.edziennik.data.db.dao
+
+import androidx.lifecycle.LiveData
+import androidx.room.*
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+
+@Dao
+interface NoteDao {
+    companion object {
+        private const val ORDER_BY = "ORDER BY addedDate DESC"
+    }
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun add(note: Note)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun addAll(noteList: List<Note>)
+
+    @Delete
+    fun delete(note: Note)
+
+    @Query("DELETE FROM notes WHERE profileId = :profileId AND noteId = :noteId")
+    fun remove(profileId: Int, noteId: Long)
+
+    @Query("SELECT * FROM notes WHERE profileId = :profileId AND noteId = :noteId $ORDER_BY")
+    fun get(profileId: Int, noteId: Long): LiveData<Note?>
+
+    @Query("SELECT * FROM notes WHERE profileId = :profileId AND noteId = :noteId $ORDER_BY")
+    fun getNow(profileId: Int, noteId: Long): Note?
+
+    @Query("SELECT * FROM notes WHERE profileId = :profileId $ORDER_BY")
+    fun getAll(profileId: Int): LiveData<List<Note>>
+
+    @Query("SELECT * FROM notes WHERE profileId = :profileId AND noteOwnerType = :ownerType AND noteOwnerId = :ownerId $ORDER_BY")
+    fun getAllFor(profileId: Int, ownerType: Note.OwnerType, ownerId: Long): LiveData<List<Note>>
+
+    @Query("SELECT * FROM notes WHERE profileId = :profileId AND noteOwnerType IS NULL $ORDER_BY")
+    fun getAllNoOwner(profileId: Int): LiveData<List<Note>>
+}

app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Note.kt

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-16.
+ */
+
+package pl.szczodrzynski.edziennik.data.db.entity
+
+import androidx.room.*
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.ui.search.Searchable
+import pl.szczodrzynski.edziennik.utils.html.BetterHtml
+
+@Entity(
+    tableName = "notes",
+    indices = [
+        Index(value = ["profileId", "noteOwnerType", "noteOwnerId"]),
+    ],
+)
+data class Note(
+    var profileId: Int,
+
+    @PrimaryKey
+    @ColumnInfo(name = "noteId")
+    val id: Long,
+
+    @ColumnInfo(name = "noteOwnerType")
+    val ownerType: OwnerType?,
+    @ColumnInfo(name = "noteOwnerId")
+    val ownerId: Long?,
+    @ColumnInfo(name = "noteReplacesOriginal")
+    val replacesOriginal: Boolean = false,
+
+    @ColumnInfo(name = "noteTopic")
+    val topic: String?,
+    @ColumnInfo(name = "noteBody")
+    val body: String,
+    @ColumnInfo(name = "noteColor")
+    val color: Long?,
+
+    @ColumnInfo(name = "noteSharedBy")
+    var sharedBy: String? = null,
+    @ColumnInfo(name = "noteSharedByName")
+    val sharedByName: String? = null,
+
+    val addedDate: Long = System.currentTimeMillis(),
+) : Searchable<Note> {
+    enum class OwnerType(
+        val isShareable: Boolean,
+        val canReplace: Boolean,
+    ) {
+        /**
+         * The [NONE] type is only for usage in the UI and should not be saved.
+         */
+        NONE(isShareable = true, canReplace = false),
+        EVENT(isShareable = true, canReplace = true),
+        DAY(isShareable = true, canReplace = false),
+        LESSON(isShareable = true, canReplace = true),
+        MESSAGE(isShareable = true, canReplace = false),
+        EVENT_SUBJECT(isShareable = true, canReplace = false),
+        LESSON_SUBJECT(isShareable = true, canReplace = false),
+        GRADE(isShareable = false, canReplace = true),
+        ATTENDANCE(isShareable = false, canReplace = true),
+        BEHAVIOR(isShareable = false, canReplace = false),
+        ANNOUNCEMENT(isShareable = true, canReplace = false),
+    }
+
+    enum class Color(val value: Long?, val stringRes: Int) {
+        NONE(null, R.string.color_none),
+        RED(0xffff1744, R.string.color_red),
+        ORANGE(0xffff9100, R.string.color_orange),
+        YELLOW(0xffffea00, R.string.color_yellow),
+        GREEN(0xff00c853, R.string.color_green),
+        TEAL(0xff00bfa5, R.string.color_teal),
+        BLUE(0xff0091ea, R.string.color_blue),
+        DARK_BLUE(0xff304ffe, R.string.color_dark_blue),
+        PURPLE(0xff6200ea, R.string.color_purple),
+        PINK(0xffd500f9, R.string.color_pink),
+        BROWN(0xff795548, R.string.color_brown),
+        GREY(0xff9e9e9e, R.string.color_grey),
+        BLACK(0xff000000, R.string.color_black),
+    }
+
+    val isShared
+        get() = sharedBy != null && sharedByName != null
+    val canEdit
+        get() = !isShared || sharedBy == "self"
+
+    // used when receiving notes
+    @Ignore
+    var teamCode: String? = null
+
+    @delegate:Ignore
+    @delegate:Transient
+    val topicHtml by lazy {
+        topic?.let {
+            BetterHtml.fromHtml(context = null, it, nl2br = true)
+        }
+    }
+
+    @delegate:Ignore
+    @delegate:Transient
+    val bodyHtml by lazy {
+        BetterHtml.fromHtml(context = null, body, nl2br = true)
+    }
+
+    @Ignore
+    @Transient
+    var isCategoryItem = false
+
+    @Ignore
+    @Transient
+    override var searchPriority = 0
+
+    @Ignore
+    @Transient
+    override var searchHighlightText: String? = null
+
+    @delegate:Ignore
+    @delegate:Transient
+    override val searchKeywords by lazy {
+        if (isCategoryItem)
+            return@lazy emptyList()
+        listOf(
+            listOf(topicHtml?.toString(), bodyHtml.toString()),
+            listOf(sharedByName),
+        )
+    }
+
+    override fun compareTo(other: Searchable<*>): Int {
+        if (other !is Note)
+            return 0
+        val order = ownerType?.ordinal ?: -1
+        val otherOrder = other.ownerType?.ordinal ?: -1
+        return when {
+            // custom ascending sorting
+            order > otherOrder -> 1
+            order < otherOrder -> -1
+            // all category elements stay at their original position
+            isCategoryItem -> 0
+            other.isCategoryItem -> 0
+            // ascending sorting
+            searchPriority > other.searchPriority -> 1
+            searchPriority < other.searchPriority -> -1
+            // descending sorting
+            addedDate > other.addedDate -> -1
+            addedDate < other.addedDate -> 1
+            else -> 0
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Noteable.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-17.
+ */
+
+package pl.szczodrzynski.edziennik.data.db.entity
+
+interface Noteable {
+
+    fun getNoteType(): Note.OwnerType
+    fun getNoteOwnerProfileId(): Int
+    fun getNoteOwnerId(): Long
+
+    var notes: MutableList<Note>
+
+    fun filterNotes() {
+        val type = getNoteType()
+        val profileId = getNoteOwnerProfileId()
+        notes.removeAll {
+            it.profileId != profileId || it.ownerType != type
+        }
+    }
+
+    fun hasNotes() = notes.isNotEmpty()
+    fun hasReplacingNotes() = notes.any { it.replacesOriginal }
+
+    fun getNoteSubstituteText(showNotes: Boolean): CharSequence? {
+        if (!showNotes)
+            return null
+        val note = notes.firstOrNull {
+            it.replacesOriginal
+        }
+        return note?.topicHtml ?: note?.bodyHtml
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Notification.kt

@@ -56,6 +56,7 @@ data class Notification(
         const val TYPE_FEEDBACK_MESSAGE = 16
         const val TYPE_AUTO_ARCHIVING = 17
         const val TYPE_TEACHER_ABSENCE = 19
+        const val TYPE_NEW_SHARED_NOTE = 20
 
         fun buildId(profileId: Int, type: Int, itemId: Long): Long {
             return 1000000000000 + profileId*10000000000 + type*100000000 + itemId;
@@ -112,6 +113,7 @@ data class Notification(
         TYPE_NEW_ATTENDANCE -> CommunityMaterial.Icon.cmd_calendar_remove_outline
         TYPE_LUCKY_NUMBER -> CommunityMaterial.Icon.cmd_emoticon_excited_outline
         TYPE_NEW_ANNOUNCEMENT -> CommunityMaterial.Icon.cmd_bullhorn_outline
+        TYPE_NEW_SHARED_NOTE -> CommunityMaterial.Icon3.cmd_playlist_edit
         else -> CommunityMaterial.Icon.cmd_bell_ring_outline
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Profile.kt

@@ -145,6 +145,9 @@ open class Profile(
             else -> "unknown"
         }
 
+    val canShare
+        get() = registration == REGISTRATION_ENABLED && !archived
+
     override fun getImageDrawable(context: Context): Drawable {
         if (archived) {
             return context.getDrawableFromRes(pl.szczodrzynski.edziennik.R.drawable.profile_archived).also {

app/src/main/java/pl/szczodrzynski/edziennik/data/db/full/AnnouncementFull.kt

@@ -3,7 +3,10 @@
  */
 package pl.szczodrzynski.edziennik.data.db.full
 
+import androidx.room.Relation
 import pl.szczodrzynski.edziennik.data.db.entity.Announcement
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
 import pl.szczodrzynski.edziennik.utils.models.Date
 
 class AnnouncementFull(
@@ -16,10 +19,16 @@ class AnnouncementFull(
         subject, text,
         startDate, endDate,
         teacherId, addedDate
-) {
+), Noteable {
     var teacherName: String? = null
 
     // metadata
     var seen = false
     var notified = false
+
+    @Relation(parentColumn = "announcementId", entityColumn = "noteOwnerId", entity = Note::class)
+    override lateinit var notes: MutableList<Note>
+    override fun getNoteType() = Note.OwnerType.ANNOUNCEMENT
+    override fun getNoteOwnerProfileId() = profileId
+    override fun getNoteOwnerId() = id
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/full/AttendanceFull.kt

@@ -3,7 +3,10 @@
  */
 package pl.szczodrzynski.edziennik.data.db.full
 
+import androidx.room.Relation
 import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Time
 
@@ -17,7 +20,7 @@ class AttendanceFull(
         baseType, typeName, typeShort, typeSymbol, typeColor,
         date, startTime, semester,
         teacherId, subjectId, addedDate
-) {
+), Noteable {
     var teacherName: String? = null
     var subjectLongName: String? = null
     var subjectShortName: String? = null
@@ -26,4 +29,10 @@ class AttendanceFull(
     var seen = false
         get() = field || baseType == TYPE_PRESENT
     var notified = false
+
+    @Relation(parentColumn = "attendanceId", entityColumn = "noteOwnerId", entity = Note::class)
+    override lateinit var notes: MutableList<Note>
+    override fun getNoteType() = Note.OwnerType.ATTENDANCE
+    override fun getNoteOwnerProfileId() = profileId
+    override fun getNoteOwnerId() = id
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/full/EventFull.kt

@@ -4,8 +4,11 @@
 package pl.szczodrzynski.edziennik.data.db.full
 
 import androidx.room.Ignore
+import androidx.room.Relation
 import pl.szczodrzynski.edziennik.data.db.entity.Event
 import pl.szczodrzynski.edziennik.data.db.entity.Metadata
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
 import pl.szczodrzynski.edziennik.ui.search.Searchable
 import pl.szczodrzynski.edziennik.utils.html.BetterHtml
 import pl.szczodrzynski.edziennik.utils.models.Date
@@ -19,7 +22,7 @@ class EventFull(
         profileId, id, date, time,
         topic, color, type,
         teacherId, subjectId, teamId, addedDate
-), Searchable<EventFull> {
+), Searchable<EventFull>, Noteable {
     constructor(event: Event, metadata: Metadata? = null) : this(
             event.profileId, event.id, event.date, event.time,
             event.topic, event.color, event.type,
@@ -109,4 +112,10 @@ class EventFull(
 
     val eventColor
         get() = color ?: typeColor ?: 0xff2196f3.toInt()
+
+    @Relation(parentColumn = "eventId", entityColumn = "noteOwnerId", entity = Note::class)
+    override lateinit var notes: MutableList<Note>
+    override fun getNoteType() = Note.OwnerType.EVENT
+    override fun getNoteOwnerProfileId() = profileId
+    override fun getNoteOwnerId() = id
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/full/GradeFull.kt

@@ -3,7 +3,10 @@
  */
 package pl.szczodrzynski.edziennik.data.db.full
 
+import androidx.room.Relation
 import pl.szczodrzynski.edziennik.data.db.entity.Grade
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
 
 class GradeFull(
         profileId: Int, id: Long, name: String, type: Int,
@@ -15,7 +18,7 @@ class GradeFull(
         value, weight, color,
         category, description, comment,
         semester, teacherId, subjectId, addedDate
-) {
+), Noteable {
     var teacherName: String? = null
     var subjectLongName: String? = null
     var subjectShortName: String? = null
@@ -23,4 +26,10 @@ class GradeFull(
     // metadata
     var seen = false
     var notified = false
+
+    @Relation(parentColumn = "gradeId", entityColumn = "noteOwnerId", entity = Note::class)
+    override lateinit var notes: MutableList<Note>
+    override fun getNoteType() = Note.OwnerType.GRADE
+    override fun getNoteOwnerProfileId() = profileId
+    override fun getNoteOwnerId() = id
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/full/LessonFull.kt

@@ -4,15 +4,18 @@
 package pl.szczodrzynski.edziennik.data.db.full
 
 import android.content.Context
+import androidx.room.Relation
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
 import pl.szczodrzynski.edziennik.utils.models.Time
 
 class LessonFull(
         profileId: Int, id: Long
 ) : Lesson(
         profileId, id
-) {
+), Noteable {
     var subjectName: String? = null
     var teacherName: String? = null
     var teamName: String? = null
@@ -133,4 +136,10 @@ class LessonFull(
     // metadata
     var seen: Boolean = false
     var notified: Boolean = false
+
+    @Relation(parentColumn = "id", entityColumn = "noteOwnerId", entity = Note::class)
+    override lateinit var notes: MutableList<Note>
+    override fun getNoteType() = Note.OwnerType.LESSON
+    override fun getNoteOwnerProfileId() = profileId
+    override fun getNoteOwnerId() = id
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/full/MessageFull.kt

@@ -7,6 +7,8 @@ import androidx.room.Ignore
 import androidx.room.Relation
 import pl.szczodrzynski.edziennik.data.db.entity.Message
 import pl.szczodrzynski.edziennik.data.db.entity.MessageRecipient
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
 import pl.szczodrzynski.edziennik.ui.search.Searchable
 import pl.szczodrzynski.edziennik.utils.html.BetterHtml
 
@@ -18,7 +20,7 @@ class MessageFull(
         profileId, id, type,
         subject, body, senderId,
         addedDate
-), Searchable<MessageFull> {
+), Searchable<MessageFull>, Noteable {
     var senderName: String? = null
     @Relation(parentColumn = "messageId", entityColumn = "messageId", entity = MessageRecipient::class)
     var recipients: MutableList<MessageRecipientFull>? = null
@@ -83,4 +85,10 @@ class MessageFull(
     // metadata
     var seen = false
     var notified = false
+
+    @Relation(parentColumn = "messageId", entityColumn = "noteOwnerId", entity = Note::class)
+    override lateinit var notes: MutableList<Note>
+    override fun getNoteType() = Note.OwnerType.MESSAGE
+    override fun getNoteOwnerProfileId() = profileId
+    override fun getNoteOwnerId() = id
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/full/NoticeFull.kt

@@ -3,6 +3,9 @@
  */
 package pl.szczodrzynski.edziennik.data.db.full
 
+import androidx.room.Relation
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
 import pl.szczodrzynski.edziennik.data.db.entity.Notice
 
 class NoticeFull(
@@ -13,10 +16,16 @@ class NoticeFull(
         profileId, id, type, semester,
         text, category, points,
         teacherId, addedDate
-) {
+), Noteable {
     var teacherName: String? = null
 
     // metadata
     var seen = false
     var notified = false
+
+    @Relation(parentColumn = "noticeId", entityColumn = "noteOwnerId", entity = Note::class)
+    override lateinit var notes: MutableList<Note>
+    override fun getNoteType() = Note.OwnerType.BEHAVIOR
+    override fun getNoteOwnerProfileId() = profileId
+    override fun getNoteOwnerId() = id
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/migration/Migration97.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-16.
+ */
+
+package pl.szczodrzynski.edziennik.data.db.migration
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration97 : Migration(96, 97) {
+    override fun migrate(database: SupportSQLiteDatabase) {
+        // notes
+        database.execSQL("""CREATE TABLE notes (
+            profileId INTEGER NOT NULL,
+            noteId INTEGER NOT NULL,
+            noteOwnerType TEXT,
+            noteOwnerId INTEGER,
+            noteReplacesOriginal INTEGER NOT NULL,
+            noteTopic TEXT,
+            noteBody TEXT NOT NULL,
+            noteColor INTEGER,
+            noteSharedBy TEXT,
+            noteSharedByName TEXT,
+            addedDate INTEGER NOT NULL,
+            PRIMARY KEY(noteId)
+        );""")
+        database.execSQL("CREATE INDEX IF NOT EXISTS index_notes_profileId_noteOwnerType_noteOwnerId ON notes (profileId, noteOwnerType, noteOwnerId);")
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/data/firebase/SzkolnyAppFirebase.kt

@@ -47,6 +47,15 @@ class SzkolnyAppFirebase(val app: App, val profiles: List<Profile>, val message:
                         message.data.getLong("eventId") ?: return@run,
                         message.data.getString("message") ?: return@run
                 )
+                "sharedNote" -> sharedNote(
+                    message.data.getString("shareTeamCode") ?: return@run,
+                    message.data.getString("note") ?: return@run,
+                    message.data.getString("message") ?: return@run,
+                )
+                "unsharedNote" -> unsharedNote(
+                    message.data.getString("unshareTeamCode") ?: return@run,
+                    message.data.getLong("noteId") ?: return@run,
+                )
                 "serverMessage",
                 "unpairedBrowser" -> serverMessage(
                         message.data.getString("title") ?: "",
@@ -119,7 +128,7 @@ class SzkolnyAppFirebase(val app: App, val profiles: List<Profile>, val message:
 
         teams.filter { it.code == teamCode }.distinctBy { it.profileId }.forEach { team ->
             val profile = profiles.firstOrNull { it.id == team.profileId } ?: return@forEach
-            if (profile.registration != Profile.REGISTRATION_ENABLED)
+            if (!profile.canShare)
                 return@forEach
             val event = Event(
                     profileId = team.profileId,
@@ -186,7 +195,7 @@ class SzkolnyAppFirebase(val app: App, val profiles: List<Profile>, val message:
 
         teams.filter { it.code == teamCode }.distinctBy { it.profileId }.forEach { team ->
             val profile = profiles.firstOrNull { it.id == team.profileId } ?: return@forEach
-            if (profile.registration != Profile.REGISTRATION_ENABLED)
+            if (!profile.canShare)
                 return@forEach
             val notificationFilter = app.config.getFor(team.profileId).sync.notificationFilter
 
@@ -209,4 +218,71 @@ class SzkolnyAppFirebase(val app: App, val profiles: List<Profile>, val message:
             PostNotifications(app, notificationList)
         }
     }
+
+    private fun sharedNote(teamCode: String, jsonStr: String, message: String) {
+        val note = app.gson.fromJson(jsonStr, Note::class.java)
+        val noteSharedBy = note.sharedBy
+        val teams = app.db.teamDao().allNow
+        // not used, as the server provides a sharing message
+        //val eventTypes = app.db.eventTypeDao().allNow
+
+        val notes = mutableListOf<Note>()
+        val notificationList = mutableListOf<Notification>()
+
+        teams.filter { it.code == teamCode }.distinctBy { it.profileId }.forEach { team ->
+            val profile = profiles.firstOrNull { it.id == team.profileId } ?: return@forEach
+            if (!profile.canShare)
+                return@forEach
+            note.profileId = team.profileId
+            if (profile.userCode == note.sharedBy) {
+                note.sharedBy = "self"
+            } else {
+                note.sharedBy = noteSharedBy
+            }
+
+            if (!app.noteManager.hasValidOwner(note))
+                return@forEach
+
+            notes += note
+
+            val hadNote = app.db.noteDao().getNow(note.profileId, note.id) != null
+            // skip creating notifications
+            if (hadNote)
+                return@forEach
+
+            val type = Notification.TYPE_NEW_SHARED_NOTE
+            val notificationFilter = app.config.getFor(note.profileId).sync.notificationFilter
+
+            if (!notificationFilter.contains(type) && note.sharedBy != "self") {
+                val notification = Notification(
+                    id = Notification.buildId(note.profileId, type, note.id),
+                    title = app.getNotificationTitle(type),
+                    text = message,
+                    type = type,
+                    profileId = profile.id,
+                    profileName = profile.name,
+                    viewId = MainActivity.DRAWER_ITEM_HOME,
+                    addedDate = note.addedDate
+                ).addExtra("noteId", note.id)
+                notificationList += notification
+            }
+        }
+        app.db.noteDao().addAll(notes)
+        if (notificationList.isNotEmpty()) {
+            app.db.notificationDao().addAll(notificationList)
+            PostNotifications(app, notificationList)
+        }
+    }
+
+    private fun unsharedNote(teamCode: String, noteId: Long) {
+        val teams = app.db.teamDao().allNow
+
+        teams.filter { it.code == teamCode }.distinctBy { it.profileId }.forEach { team ->
+            val profile = profiles.firstOrNull { it.id == team.profileId } ?: return@forEach
+            if (!profile.canShare)
+                return@forEach
+
+            app.db.noteDao().remove(team.profileId, noteId)
+        }
+    }
 }

app/src/main/java/pl/szczodrzynski/edziennik/ext/DataExtensions.kt

@@ -63,6 +63,7 @@ fun Context.getNotificationTitle(type: Int): String {
         Notification.TYPE_AUTO_ARCHIVING -> R.string.notification_type_auto_archiving
         Notification.TYPE_TEACHER_ABSENCE -> R.string.notification_type_new_teacher_absence
         Notification.TYPE_GENERAL -> R.string.notification_type_general
+        Notification.TYPE_NEW_SHARED_NOTE -> R.string.notification_type_new_shared_note
         else -> R.string.notification_type_general
     })
 }

app/src/main/java/pl/szczodrzynski/edziennik/ext/DialogExtensions.kt

@@ -4,13 +4,22 @@
 
 package pl.szczodrzynski.edziennik.ext
 
+import android.annotation.SuppressLint
+import android.content.res.ColorStateList
 import android.text.InputType
 import android.view.LayoutInflater
 import androidx.annotation.StringRes
+import androidx.appcompat.app.AlertDialog
+import androidx.core.graphics.ColorUtils
+import androidx.core.view.ViewCompat
 import androidx.core.view.isVisible
 import androidx.core.widget.addTextChangedListener
+import com.google.android.material.color.MaterialColors
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.google.android.material.dialog.MaterialDialogs
+import com.google.android.material.shape.MaterialShapeDrawable
 import com.google.android.material.textfield.TextInputEditText
+import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.databinding.DialogEditTextBinding
 
 fun MaterialAlertDialogBuilder.input(
@@ -20,7 +29,7 @@ fun MaterialAlertDialogBuilder.input(
     value: CharSequence? = null,
     changeListener: ((editText: TextInputEditText, input: String) -> Boolean)? = null,
     positiveButton: Int? = null,
-    positiveListener: ((editText: TextInputEditText, input: String) -> Boolean)? = null
+    positiveListener: ((editText: TextInputEditText, input: String) -> Boolean)? = null,
 ): MaterialAlertDialogBuilder {
     val b = DialogEditTextBinding.inflate(LayoutInflater.from(context), null, false)
     b.title.text = message
@@ -43,12 +52,53 @@ fun MaterialAlertDialogBuilder.input(
     return this
 }
 
-fun MaterialAlertDialogBuilder.setTitle(@StringRes resId: Int, vararg formatArgs: Any): MaterialAlertDialogBuilder {
+fun MaterialAlertDialogBuilder.setTitle(
+    @StringRes resId: Int,
+    vararg formatArgs: Any,
+): MaterialAlertDialogBuilder {
     setTitle(context.getString(resId, *formatArgs))
     return this
 }
 
-fun MaterialAlertDialogBuilder.setMessage(@StringRes resId: Int, vararg formatArgs: Any): MaterialAlertDialogBuilder {
+fun MaterialAlertDialogBuilder.setMessage(
+    @StringRes resId: Int,
+    vararg formatArgs: Any,
+): MaterialAlertDialogBuilder {
     setMessage(context.getString(resId, *formatArgs))
     return this
 }
+
+@SuppressLint("RestrictedApi")
+fun AlertDialog.overlayBackgroundColor(color: Int, alpha: Int) {
+    // this is absolutely horrible
+    val colorSurface16dp = ColorUtils.compositeColors(
+        R.color.colorSurface_16dp.resolveColor(context),
+        MaterialColors.getColor(
+            context,
+            R.attr.colorSurface,
+            javaClass.canonicalName,
+        )
+    )
+    val colorDialogBackground = MaterialColors.layer(colorSurface16dp, color, alpha / 255f)
+    val backgroundInsets = MaterialDialogs.getDialogBackgroundInsets(
+        context,
+        R.attr.alertDialogStyle,
+        R.style.MaterialAlertDialog_MaterialComponents,
+    )
+    val background = MaterialShapeDrawable(
+        context,
+        null,
+        R.attr.alertDialogStyle,
+        R.style.MaterialAlertDialog_MaterialComponents
+    )
+    with(background) {
+        initializeElevationOverlay(context)
+        fillColor = ColorStateList.valueOf(colorDialogBackground)
+        /*if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+            setCornerSize(android.R.attr.dialogCornerRadius.resolveDimenAttr(context))
+        }*/
+        elevation = ViewCompat.getElevation(window?.decorView ?: return@with)
+    }
+    val insetDrawable = MaterialDialogs.insetDrawable(background, backgroundInsets)
+    window?.setBackgroundDrawable(insetDrawable)
+}

app/src/main/java/pl/szczodrzynski/edziennik/ext/GraphicsExtensions.kt

@@ -10,10 +10,7 @@ import android.graphics.PorterDuff
 import android.graphics.PorterDuffColorFilter
 import android.graphics.drawable.Drawable
 import android.util.TypedValue
-import androidx.annotation.AttrRes
+import androidx.annotation.*
-import androidx.annotation.ColorInt
-import androidx.annotation.ColorRes
-import androidx.annotation.DrawableRes
 import androidx.core.content.res.ResourcesCompat
 import com.mikepenz.iconics.typeface.IIcon
 import pl.szczodrzynski.navlib.ImageHolder
@@ -60,6 +57,12 @@ fun @receiver:AttrRes Int.resolveAttr(context: Context?): Int {
     context?.theme?.resolveAttribute(this, typedValue, true)
     return typedValue.data
 }
+@Dimension
+fun @receiver:AttrRes Int.resolveDimenAttr(context: Context): Float {
+    val typedValue = TypedValue()
+    context.theme?.resolveAttribute(this, typedValue, true)
+    return typedValue.getDimension(context.resources.displayMetrics)
+}
 @ColorInt
 fun @receiver:ColorRes Int.resolveColor(context: Context): Int {
     return ResourcesCompat.getColor(context.resources, this, context.theme)

app/src/main/java/pl/szczodrzynski/edziennik/ui/agenda/DayDialog.kt

@@ -26,7 +26,9 @@ import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
 import pl.szczodrzynski.edziennik.ui.event.EventDetailsDialog
 import pl.szczodrzynski.edziennik.ui.event.EventListAdapter
 import pl.szczodrzynski.edziennik.ui.event.EventManualDialog
+import pl.szczodrzynski.edziennik.ui.notes.setupNotesButton
 import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Time
 import pl.szczodrzynski.edziennik.utils.models.Week
@@ -36,6 +38,7 @@ class DayDialog(
     private val profileId: Int,
     private val date: Date,
     private val eventTypeId: Long? = null,
+    private val showNotes: Boolean = true,
     onShowListener: ((tag: String) -> Unit)? = null,
     onDismissListener: ((tag: String) -> Unit)? = null,
 ) : BindingDialog<DialogDayBinding>(activity, onShowListener, onDismissListener) {
@@ -151,7 +154,7 @@ class DayDialog(
             showTime = true,
             showSubject = true,
             markAsSeen = true,
-            onItemClick = {
+            onEventClick = {
                 EventDetailsDialog(
                     activity,
                     it,
@@ -171,6 +174,10 @@ class DayDialog(
         )
 
         app.db.eventDao().getAllByDate(profileId, date).observe(activity) { events ->
+            events.forEach {
+                it.filterNotes()
+            }
+
             adapter.setAllItems(
                 if (eventTypeId != null)
                     events.filter { it.type == eventTypeId }
@@ -197,5 +204,15 @@ class DayDialog(
                 b.eventsNoData.visibility = View.VISIBLE
             }
         }
+
+        b.notesButton.isVisible = showNotes
+        b.notesButton.setupNotesButton(
+            activity = activity,
+            owner = date,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        )
+        if (showNotes)
+            NoteManager.setLegendText(date, b.legend)
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/agenda/lessonchanges/LessonChangesAdapter.kt

@@ -16,11 +16,13 @@ import pl.szczodrzynski.edziennik.data.db.entity.Lesson
 import pl.szczodrzynski.edziennik.data.db.full.LessonFull
 import pl.szczodrzynski.edziennik.databinding.TimetableLessonBinding
 import pl.szczodrzynski.edziennik.ext.*
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.navlib.getColorFromAttr
 
 class LessonChangesAdapter(
         val context: Context,
-        private val onItemClick: ((lesson: LessonFull) -> Unit)? = null
+        private val showNotes: Boolean = true,
+        private val onLessonClick: ((lesson: LessonFull) -> Unit)? = null
 ) : RecyclerView.Adapter<LessonChangesAdapter.ViewHolder>() {
 
     var items = listOf<LessonFull>()
@@ -39,8 +41,10 @@ class LessonChangesAdapter(
         val lesson = items[position]
         val b = holder.b
 
-        b.root.onClick {
+        if (onLessonClick != null) {
-            onItemClick?.invoke(lesson)
+            b.root.onClick {
+                onLessonClick.invoke(lesson)
+            }
         }
 
         val startTime = lesson.displayStartTime ?: return
@@ -84,7 +88,8 @@ class LessonChangesAdapter(
 
 
         b.lessonNumber = lesson.displayLessonNumber
-        b.subjectName.text = lesson.displaySubjectName?.let {
+        val lessonText = lesson.getNoteSubstituteText(showNotes) ?: lesson.displaySubjectName
+        b.subjectName.text = lessonText?.let {
             if (lesson.type == Lesson.TYPE_CANCELLED || lesson.type == Lesson.TYPE_SHIFTED_SOURCE)
                 it.asStrikethroughSpannable().asColoredSpannable(colorSecondary)
             else
@@ -93,6 +98,9 @@ class LessonChangesAdapter(
         b.detailsFirst.text = listOfNotEmpty(timeRange, classroomInfo).concat(bullet)
         b.detailsSecond.text = listOfNotEmpty(teacherInfo, teamInfo).concat(bullet)
 
+        if (showNotes)
+            NoteManager.prependIcon(lesson, b.subjectName)
+
         //lb.subjectName.typeface = Typeface.create("sans-serif-light", Typeface.BOLD)
         when (lesson.type) {
             Lesson.TYPE_NORMAL -> {

app/src/main/java/pl/szczodrzynski/edziennik/ui/agenda/lessonchanges/LessonChangesDialog.kt

@@ -35,7 +35,7 @@ class LessonChangesDialog(
 
         val adapter = LessonChangesAdapter(
             activity,
-            onItemClick = {
+            onLessonClick = {
                 LessonDetailsDialog(
                     activity,
                     it,

app/src/main/java/pl/szczodrzynski/edziennik/ui/announcements/AnnouncementsAdapter.java

@@ -10,6 +10,7 @@ import android.view.View;
 import android.view.ViewGroup;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.databinding.DataBindingUtil;
 import androidx.recyclerview.widget.RecyclerView;
 
@@ -24,13 +25,14 @@ public class AnnouncementsAdapter extends RecyclerView.Adapter<AnnouncementsAdap
 
     private Context context;
     public List<AnnouncementFull> announcementList;
+    @Nullable
     public OnAnnouncementClickListener onClick;
 
     public interface OnAnnouncementClickListener {
         void onClick(View v, AnnouncementFull announcement);
     }
 
-    public AnnouncementsAdapter(Context context, List<AnnouncementFull> announcementList, OnAnnouncementClickListener onClick) {
+    public AnnouncementsAdapter(Context context, List<AnnouncementFull> announcementList, @Nullable OnAnnouncementClickListener onClick) {
         //setHasStableIds(true);
 
         this.context = context;
@@ -54,11 +56,12 @@ public class AnnouncementsAdapter extends RecyclerView.Adapter<AnnouncementsAdap
         AnnouncementFull item = announcementList.get(groupPosition);
         RowAnnouncementsItemBinding b = holder.b;
 
-        b.announcementsItem.setOnClickListener((v -> {
+        if (onClick != null) {
-            if (onClick != null) {
+            b.announcementsItem.setOnClickListener(v -> onClick.onClick(v, item));
-                onClick.onClick(v, item);
+        }
-            }
+        else {
-        }));
+            b.announcementsItem.setOnClickListener(null);
+        }
         b.announcementsItemSender.setText(item.getTeacherName());
         b.announcementsItemTitle.setText(item.getSubject());
         b.announcementsItemText.setText(item.getText());

app/src/main/java/pl/szczodrzynski/edziennik/ui/announcements/AnnouncementsFragment.java

@@ -107,6 +107,10 @@ public class AnnouncementsFragment extends Fragment {
             if (app == null || activity == null || b == null || !isAdded())
                 return;
 
+            for (AnnouncementFull it : announcements) {
+                it.filterNotes();
+            }
+
             if (announcements == null) {
                 recyclerView.setVisibility(View.GONE);
                 b.announcementsNoData.setVisibility(View.VISIBLE);

app/src/main/java/pl/szczodrzynski/edziennik/ui/attendance/AttendanceAdapter.kt

@@ -28,6 +28,7 @@ import kotlin.coroutines.CoroutineContext
 class AttendanceAdapter(
         val activity: AppCompatActivity,
         val type: Int,
+        val showNotes: Boolean = true,
         var onAttendanceClick: ((item: AttendanceFull) -> Unit)? = null
 ) : RecyclerView.Adapter<RecyclerView.ViewHolder>(), CoroutineScope {
     companion object {
@@ -175,7 +176,10 @@ class AttendanceAdapter(
             holder is EmptyViewHolder && item is AttendanceEmpty -> holder.onBind(activity, app, item, position, this)
         }
 
-        holder.itemView.setOnClickListener(onClickListener)
+        if (item !is AttendanceFull || onAttendanceClick != null)
+            holder.itemView.setOnClickListener(onClickListener)
+        else
+            holder.itemView.setOnClickListener(null)
     }
 
     fun notifyItemChanged(model: Any) {

app/src/main/java/pl/szczodrzynski/edziennik/ui/attendance/AttendanceDetailsDialog.kt

@@ -7,17 +7,21 @@ package pl.szczodrzynski.edziennik.ui.attendance
 import android.view.LayoutInflater
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.graphics.ColorUtils
+import androidx.core.view.isVisible
 import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
 import pl.szczodrzynski.edziennik.databinding.AttendanceDetailsDialogBinding
 import pl.szczodrzynski.edziennik.ext.setTintColor
 import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
+import pl.szczodrzynski.edziennik.ui.notes.setupNotesButton
 import pl.szczodrzynski.edziennik.utils.BetterLink
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 
 class AttendanceDetailsDialog(
     activity: AppCompatActivity,
     private val attendance: AttendanceFull,
+    private val showNotes: Boolean = true,
     onShowListener: ((tag: String) -> Unit)? = null,
     onDismissListener: ((tag: String) -> Unit)? = null,
 ) : BindingDialog<AttendanceDetailsDialogBinding>(activity, onShowListener, onDismissListener) {
@@ -48,5 +52,15 @@ class AttendanceDetailsDialog(
                 onActionSelected = dialog::dismiss
             )
         }
+
+        b.notesButton.isVisible = showNotes
+        b.notesButton.setupNotesButton(
+            activity = activity,
+            owner = attendance,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        )
+        if (showNotes)
+            NoteManager.setLegendText(attendance, b.legend)
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/attendance/AttendanceListFragment.kt

@@ -66,6 +66,10 @@ class AttendanceListFragment : LazyFragment(), CoroutineScope {
         app.db.attendanceDao().getAll(App.profileId).observe(this@AttendanceListFragment, Observer { items -> this@AttendanceListFragment.launch {
             if (!isAdded) return@launch
 
+            items.forEach {
+                it.filterNotes()
+            }
+
             // load & configure the adapter
             adapter.items = withContext(Dispatchers.Default) { processAttendance(items) }
             if (adapter.items.isNotNullNorEmpty() && b.list.adapter == null) {

app/src/main/java/pl/szczodrzynski/edziennik/ui/attendance/AttendanceSummaryFragment.kt

@@ -75,6 +75,10 @@ class AttendanceSummaryFragment : LazyFragment(), CoroutineScope {
         app.db.attendanceDao().getAll(App.profileId).observe(this@AttendanceSummaryFragment, Observer { items -> this@AttendanceSummaryFragment.launch {
             if (!isAdded) return@launch
 
+            items.forEach {
+                it.filterNotes()
+            }
+
             // load & configure the adapter
             attendance = items
             adapter.items = withContext(Dispatchers.Default) { processAttendance() }

app/src/main/java/pl/szczodrzynski/edziennik/ui/attendance/viewholder/AttendanceViewHolder.kt

@@ -19,6 +19,7 @@ import pl.szczodrzynski.edziennik.ui.attendance.models.AttendanceDayRange
 import pl.szczodrzynski.edziennik.ui.attendance.models.AttendanceMonth
 import pl.szczodrzynski.edziennik.ui.grades.models.ExpandableItemModel
 import pl.szczodrzynski.edziennik.ui.grades.viewholder.BindableViewHolder
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.edziennik.utils.models.Week
 
 class AttendanceViewHolder(
@@ -38,7 +39,10 @@ class AttendanceViewHolder(
         b.attendanceView.setAttendance(item, manager, bigView = true)
 
         b.type.text = item.typeName
-        b.subjectName.text = item.subjectLongName ?: item.lessonTopic
+        b.subjectName.text = item.getNoteSubstituteText(adapter.showNotes) ?: item.subjectLongName
+                ?: item.lessonTopic
+        if (adapter.showNotes)
+            NoteManager.prependIcon(item, b.subjectName)
         b.dateTime.text = listOf(
                 Week.getFullDayName(item.date.weekDay),
                 item.date.formattedStringShort,

app/src/main/java/pl/szczodrzynski/edziennik/ui/base/CrashActivity.kt

@@ -19,7 +19,6 @@ import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.api.ERROR_APP_CRASH
 import pl.szczodrzynski.edziennik.data.api.szkolny.SzkolnyApi
 import pl.szczodrzynski.edziennik.data.api.szkolny.request.ErrorReportRequest
-import pl.szczodrzynski.edziennik.data.db.entity.Profile
 import pl.szczodrzynski.edziennik.ext.resolveColor
 import pl.szczodrzynski.edziennik.utils.Themes.appTheme
 import pl.szczodrzynski.edziennik.utils.html.BetterHtml
@@ -116,7 +115,7 @@ class CrashActivity : AppCompatActivity(), CoroutineScope {
         content = content.replace(packageName.toRegex(), "<font color='#4caf50'>$packageName</font>")
         content = content.replace("\n".toRegex(), "<br>")
         contentPlain += "\n" + Build.MANUFACTURER + "\n" + Build.BRAND + "\n" + Build.MODEL + "\n" + Build.DEVICE + "\n"
-        if (app.profile.registration == Profile.REGISTRATION_ENABLED) {
+        if (!app.profile.canShare) {
             contentPlain += "U: " + app.profile.userCode + "\nS: " + app.profile.studentNameLong + "\n"
         }
         contentPlain += BuildConfig.VERSION_NAME + " " + BuildConfig.BUILD_TYPE

app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/settings/AgendaConfigDialog.kt

@@ -9,7 +9,6 @@ import androidx.appcompat.app.AppCompatActivity
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.data.db.entity.Profile
-import pl.szczodrzynski.edziennik.data.db.entity.Profile.Companion.REGISTRATION_ENABLED
 import pl.szczodrzynski.edziennik.databinding.DialogConfigAgendaBinding
 import pl.szczodrzynski.edziennik.ext.onChange
 import pl.szczodrzynski.edziennik.ui.dialogs.base.ConfigDialog
@@ -40,9 +39,9 @@ class AgendaConfigDialog(
         b.isAgendaMode = profileConfig.agendaViewType == Profile.AGENDA_DEFAULT
 
         b.eventSharingEnabled.isChecked =
-            app.profile.enableSharedEvents && app.profile.registration == REGISTRATION_ENABLED
+            app.profile.enableSharedEvents && app.profile.canShare
         b.eventSharingEnabled.onChange { _, isChecked ->
-            if (isChecked && app.profile.registration != REGISTRATION_ENABLED) {
+            if (isChecked && !app.profile.canShare) {
                 b.eventSharingEnabled.isChecked = false
                 val dialog = RegistrationConfigDialog(
                     activity,

app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/settings/RegistrationConfigDialog.kt

@@ -19,7 +19,7 @@ import kotlin.coroutines.CoroutineContext
 class RegistrationConfigDialog(
     val activity: AppCompatActivity,
     val profile: Profile,
-    val onChangeListener: ((enabled: Boolean) -> Unit)? = null,
+    val onChangeListener: (suspend (enabled: Boolean) -> Unit)? = null,
     val onShowListener: ((tag: String) -> Unit)? = null,
     val onDismissListener: ((tag: String) -> Unit)? = null
 ) : CoroutineScope {
@@ -57,6 +57,21 @@ class RegistrationConfigDialog(
             .show()
     }
 
+    fun showNoteShareDialog() {
+        onShowListener?.invoke(TAG + "NoteShare")
+        dialog = MaterialAlertDialogBuilder(activity)
+            .setTitle(R.string.registration_config_note_sharing_title)
+            .setMessage(R.string.registration_config_note_sharing_text)
+            .setPositiveButton(R.string.i_agree) { _, _ ->
+                enableRegistration()
+            }
+            .setNegativeButton(R.string.cancel, null)
+            .setOnDismissListener {
+                onDismissListener?.invoke(TAG + "NoteShare")
+            }
+            .show()
+    }
+
     fun showEnableDialog() {
         onShowListener?.invoke(TAG + "Enable")
         dialog = MaterialAlertDialogBuilder(activity)

app/src/main/java/pl/szczodrzynski/edziennik/ui/event/EventDetailsDialog.kt

@@ -27,6 +27,7 @@ import pl.szczodrzynski.edziennik.data.db.full.EventFull
 import pl.szczodrzynski.edziennik.databinding.DialogEventDetailsBinding
 import pl.szczodrzynski.edziennik.ext.*
 import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
+import pl.szczodrzynski.edziennik.ui.notes.setupNotesButton
 import pl.szczodrzynski.edziennik.ui.timetable.TimetableFragment
 import pl.szczodrzynski.edziennik.utils.BetterLink
 import pl.szczodrzynski.edziennik.utils.models.Date
@@ -36,6 +37,7 @@ class EventDetailsDialog(
     activity: AppCompatActivity,
     // this event is observed for changes
     private var event: EventFull,
+    private val showNotes: Boolean = true,
     onShowListener: ((tag: String) -> Unit)? = null,
     onDismissListener: ((tag: String) -> Unit)? = null,
 ) : BindingDialog<DialogEventDetailsBinding>(activity, onShowListener, onDismissListener) {
@@ -96,6 +98,8 @@ class EventDetailsDialog(
             manager.markAsSeen(event)
         }
 
+        event.filterNotes()
+
         val bullet = " • "
         val colorSecondary = android.R.attr.textColorSecondary.resolveAttr(activity)
 
@@ -104,7 +108,7 @@ class EventDetailsDialog(
         }
         catch (_: Exception) {}
 
-        manager.setLegendText(b.legend, event)
+        manager.setLegendText(b.legend, event, showNotes)
 
         b.typeColor.background?.setTintColor(event.eventColor)
 
@@ -257,6 +261,14 @@ class EventDetailsDialog(
                 it.putStringArray("attachmentNames", event.attachmentNames!!.toTypedArray())
             }, owner = event)
         }
+
+        b.notesButton.isVisible = showNotes
+        b.notesButton.setupNotesButton(
+            activity = activity,
+            owner = event,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        )
     }
 
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)

app/src/main/java/pl/szczodrzynski/edziennik/ui/event/EventListAdapter.kt

@@ -22,12 +22,14 @@ class EventListAdapter(
     val simpleMode: Boolean = false,
     val showWeekDay: Boolean = false,
     val showDate: Boolean = false,
+    val showColor: Boolean = true,
     val showType: Boolean = true,
     val showTime: Boolean = true,
     val showSubject: Boolean = true,
     val markAsSeen: Boolean = true,
+    val showNotes: Boolean = true,
     isReversed: Boolean = false,
-    val onItemClick: ((event: EventFull) -> Unit)? = null,
+    val onEventClick: ((event: EventFull) -> Unit)? = null,
     val onEventEditClick: ((event: EventFull) -> Unit)? = null,
 ) : SearchableAdapter<EventFull>(isReversed), CoroutineScope {
     companion object {

app/src/main/java/pl/szczodrzynski/edziennik/ui/event/EventManualDialog.kt

@@ -13,9 +13,6 @@ import androidx.appcompat.app.AppCompatActivity
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.jaredrummler.android.colorpicker.ColorPickerDialog
 import com.jaredrummler.android.colorpicker.ColorPickerDialogListener
-import com.mikepenz.iconics.IconicsDrawable
-import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
-import com.mikepenz.iconics.utils.sizeDp
 import kotlinx.coroutines.*
 import org.greenrobot.eventbus.EventBus
 import org.greenrobot.eventbus.Subscribe
@@ -31,7 +28,6 @@ import pl.szczodrzynski.edziennik.data.db.full.EventFull
 import pl.szczodrzynski.edziennik.data.db.full.LessonFull
 import pl.szczodrzynski.edziennik.databinding.DialogEventManualV2Binding
 import pl.szczodrzynski.edziennik.ext.*
-import pl.szczodrzynski.edziennik.ui.dialogs.StyledTextDialog
 import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
 import pl.szczodrzynski.edziennik.ui.dialogs.settings.RegistrationConfigDialog
 import pl.szczodrzynski.edziennik.ui.views.TimeDropdown.Companion.DISPLAY_LESSONS
@@ -123,20 +119,13 @@ class EventManualDialog(
             }
         }
 
-        b.topicLayout.endIconDrawable = IconicsDrawable(activity, CommunityMaterial.Icon3.cmd_open_in_new).apply {
+        textStylingManager.attachToField(
-            sizeDp = 24
+            activity = activity,
-        }
+            textLayout = b.topicLayout,
-        b.topicLayout.setEndIconOnClickListener {
+            textEdit = b.topic,
-            StyledTextDialog(
+            onShowListener = onShowListener,
-                activity,
+            onDismissListener = onDismissListener,
-                initialText = b.topic.text,
+        )
-                onSuccess = {
-                    b.topic.text = it
-                },
-                onShowListener,
-                onDismissListener
-            ).show()
-        }
 
         stylingConfig = StylingConfigBase(editText = b.topic, htmlMode = SIMPLE)
 
@@ -414,7 +403,7 @@ class EventManualDialog(
 
         val share = b.shareSwitch.isChecked
 
-        if (share && profile.registration != Profile.REGISTRATION_ENABLED) {
+        if (share && !profile.canShare) {
             RegistrationConfigDialog(activity, profile, onChangeListener = { enabled ->
                 if (enabled)
                     saveEvent()

app/src/main/java/pl/szczodrzynski/edziennik/ui/event/EventViewHolder.kt

@@ -36,14 +36,16 @@ class EventViewHolder(
     ) {
         val manager = app.eventManager
 
-        b.root.onClick {
+        if (adapter.onEventClick != null) {
-            adapter.onItemClick?.invoke(item)
+            b.root.onClick {
-            if (!item.seen) {
+                adapter.onEventClick.invoke(item)
-                manager.markAsSeen(item)
+                if (!item.seen) {
-            }
+                    manager.markAsSeen(item)
-            if (item.showAsUnseen == true) {
+                }
-                item.showAsUnseen = false
+                if (item.showAsUnseen == true) {
-                adapter.notifyItemChanged(item)
+                    item.showAsUnseen = false
+                    adapter.notifyItemChanged(item)
+                }
             }
         }
 
@@ -52,7 +54,7 @@ class EventViewHolder(
 
         b.simpleMode = adapter.simpleMode
 
-        manager.setEventTopic(b.topic, item, showType = false)
+        manager.setEventTopic(b.topic, item, showType = false, showNotes = adapter.showNotes)
         b.topic.text = adapter.highlightSearchText(
             item = item,
             text = b.topic.text,
@@ -67,13 +69,13 @@ class EventViewHolder(
             if (adapter.showDate)
                 item.date.getRelativeString(activity, 7) ?: item.date.formattedStringShort
             else null,
-            if (adapter.showType)
+            if (adapter.showType && item.typeName != null)
                 item.typeName
             else null,
             if (adapter.showTime)
                 item.time?.stringHM ?: app.getString(R.string.event_all_day)
             else null,
-            if (adapter.showSubject)
+            if (adapter.showSubject && item.subjectLongName != null)
                 adapter.highlightSearchText(
                     item = item,
                     text = item.subjectLongName ?: "",
@@ -111,13 +113,19 @@ class EventViewHolder(
         b.attachmentIcon.isVisible = item.hasAttachments
 
         b.typeColor.background?.setTintColor(item.eventColor)
-        b.typeColor.isVisible = adapter.showType
+        b.typeColor.isVisible = adapter.showType && adapter.showColor
 
-        b.editButton.isVisible = !adapter.simpleMode && item.addedManually && !item.isDone
+        b.editButton.isVisible = !adapter.simpleMode
-        b.editButton.onClick {
+                && item.addedManually
-            adapter.onEventEditClick?.invoke(item)
+                && !item.isDone
+                && adapter.onEventEditClick != null
+
+        if (adapter.onEventEditClick != null) {
+            b.editButton.onClick {
+                adapter.onEventEditClick.invoke(item)
+            }
+            b.editButton.attachToastHint(R.string.hint_edit_event)
         }
-        b.editButton.attachToastHint(R.string.hint_edit_event)
 
         if (item.showAsUnseen == null)
             item.showAsUnseen = !item.seen

app/src/main/java/pl/szczodrzynski/edziennik/ui/grades/GradeDetailsDialog.kt

@@ -15,12 +15,15 @@ import pl.szczodrzynski.edziennik.ext.onClick
 import pl.szczodrzynski.edziennik.ext.setTintColor
 import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
 import pl.szczodrzynski.edziennik.ui.dialogs.settings.GradesConfigDialog
+import pl.szczodrzynski.edziennik.ui.notes.setupNotesButton
 import pl.szczodrzynski.edziennik.utils.BetterLink
 import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 
 class GradeDetailsDialog(
     activity: AppCompatActivity,
     private val grade: GradeFull,
+    private val showNotes: Boolean = true,
     onShowListener: ((tag: String) -> Unit)? = null,
     onDismissListener: ((tag: String) -> Unit)? = null,
 ) : BindingDialog<DialogGradeDetailsBinding>(activity, onShowListener, onDismissListener) {
@@ -71,23 +74,34 @@ class GradeDetailsDialog(
         val historyList = withContext(Dispatchers.Default) {
             app.db.gradeDao().getByParentIdNow(App.profileId, grade.id)
         }
-        if (historyList.isEmpty()) {
-            b.historyVisible = false
-            return
-        }
-        b.historyVisible = true
-        //b.gradeHistoryNest.isNestedScrollingEnabled = false
 
-        b.gradeHistoryList.adapter = GradesAdapter(activity, {
+        historyList.forEach {
-            GradeDetailsDialog(activity, it).show()
+            it.filterNotes()
-        }).also {
-            it.items = historyList.toMutableList()
         }
 
-        b.gradeHistoryList.apply {
+        b.historyVisible = historyList.isNotEmpty()
-            setHasFixedSize(true)
+        if (historyList.isNotEmpty()) {
-            layoutManager = LinearLayoutManager(context)
+            b.gradeHistoryList.adapter = GradesAdapter(activity, onGradeClick = {
-            addItemDecoration(SimpleDividerItemDecoration(context))
+                GradeDetailsDialog(activity, it).show()
+            }).also {
+                it.items = historyList.toMutableList()
+            }
+
+            b.gradeHistoryList.apply {
+                setHasFixedSize(true)
+                layoutManager = LinearLayoutManager(context)
+                addItemDecoration(SimpleDividerItemDecoration(context))
+            }
         }
+
+        b.notesButton.isVisible = showNotes
+        b.notesButton.setupNotesButton(
+            activity = activity,
+            owner = grade,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        )
+        if (showNotes)
+            NoteManager.setLegendText(grade, b.legend)
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/grades/GradesAdapter.kt

@@ -25,6 +25,7 @@ import kotlin.coroutines.CoroutineContext
 
 class GradesAdapter(
         val activity: AppCompatActivity,
+        val showNotes: Boolean = true,
         var onGradeClick: ((item: GradeFull) -> Unit)? = null,
         var onGradesEditorClick: ((subject: GradesSubject, semester: GradesSemester) -> Unit)? = null
 ) : RecyclerView.Adapter<RecyclerView.ViewHolder>(), CoroutineScope {
@@ -218,7 +219,10 @@ class GradesAdapter(
             }
         }
 
-        holder.itemView.setOnClickListener(onClickListener)
+        if (item !is GradeFull || onGradeClick != null)
+            holder.itemView.setOnClickListener(onClickListener)
+        else
+            holder.itemView.setOnClickListener(null)
     }
 
     fun notifyItemChanged(model: Any) {

app/src/main/java/pl/szczodrzynski/edziennik/ui/grades/GradesListFragment.kt

@@ -76,6 +76,10 @@ class GradesListFragment : Fragment(), CoroutineScope {
         app.db.gradeDao().getAllOrderBy(App.profileId, app.gradesManager.getOrderByString()).observe(viewLifecycleOwner, Observer { grades -> this@GradesListFragment.launch {
             if (!isAdded) return@launch
 
+            grades.forEach {
+                it.filterNotes()
+            }
+
             val items = when {
                 app.config.forProfile().grades.hideSticksFromOld && App.devMode -> grades.filter { it.value != 1.0f }
                 else -> grades

app/src/main/java/pl/szczodrzynski/edziennik/ui/grades/viewholder/GradeViewHolder.kt

@@ -15,6 +15,7 @@ import pl.szczodrzynski.edziennik.data.db.full.GradeFull
 import pl.szczodrzynski.edziennik.databinding.GradesItemGradeBinding
 import pl.szczodrzynski.edziennik.ui.grades.GradesAdapter
 import pl.szczodrzynski.edziennik.ui.grades.models.GradesSubject
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.edziennik.utils.models.Date
 
 class GradeViewHolder(
@@ -33,14 +34,16 @@ class GradeViewHolder(
         b.gradeName.setGrade(grade, manager, bigView = true)
 
         if (grade.description.isNullOrBlank()) {
-            b.gradeDescription.text = grade.category
+            b.gradeDescription.text =
+                grade.getNoteSubstituteText(adapter.showNotes) ?: grade.category
             b.gradeCategory.text =
                 if (grade.isImprovement)
                     app.getString(R.string.grades_improvement_category_format, "")
                 else
                     ""
         } else {
-            b.gradeDescription.text = grade.description
+            b.gradeDescription.text =
+                grade.getNoteSubstituteText(adapter.showNotes) ?: grade.description
             b.gradeCategory.text =
                 if (grade.isImprovement)
                     app.getString(R.string.grades_improvement_category_format, grade.category)
@@ -48,6 +51,9 @@ class GradeViewHolder(
                     grade.category
         }
 
+        if (adapter.showNotes)
+            NoteManager.prependIcon(grade, b.gradeDescription)
+
         val weightText = manager.getWeightString(activity, grade, showClassAverage = true)
         b.gradeWeight.text = weightText
         b.gradeWeight.isVisible = weightText != null

app/src/main/java/pl/szczodrzynski/edziennik/ui/home/HomeCard.kt

@@ -24,6 +24,7 @@ interface HomeCard {
         const val CARD_TIMETABLE = 2
         const val CARD_GRADES = 3
         const val CARD_EVENTS = 4
+        const val CARD_NOTES = 5
     }
 
     val id: Int

app/src/main/java/pl/szczodrzynski/edziennik/ui/home/HomeConfigDialog.kt

@@ -12,6 +12,7 @@ import pl.szczodrzynski.edziennik.ui.dialogs.base.BaseDialog
 import pl.szczodrzynski.edziennik.ui.home.HomeCard.Companion.CARD_EVENTS
 import pl.szczodrzynski.edziennik.ui.home.HomeCard.Companion.CARD_GRADES
 import pl.szczodrzynski.edziennik.ui.home.HomeCard.Companion.CARD_LUCKY_NUMBER
+import pl.szczodrzynski.edziennik.ui.home.HomeCard.Companion.CARD_NOTES
 import pl.szczodrzynski.edziennik.ui.home.HomeCard.Companion.CARD_TIMETABLE
 
 class HomeConfigDialog(
@@ -32,6 +33,7 @@ class HomeConfigDialog(
         R.string.card_type_timetable to CARD_TIMETABLE,
         R.string.card_type_grades to CARD_GRADES,
         R.string.card_type_events to CARD_EVENTS,
+        R.string.card_type_notes to CARD_NOTES,
     ).mapKeys { (resId, _) -> activity.getString(resId) }
 
     override fun getDefaultSelectedItems() =

app/src/main/java/pl/szczodrzynski/edziennik/ui/home/HomeFragment.kt

@@ -144,7 +144,8 @@ class HomeFragment : Fragment(), CoroutineScope {
                     HomeCardModel(app.profile.id, HomeCard.CARD_LUCKY_NUMBER),
                     HomeCardModel(app.profile.id, HomeCard.CARD_TIMETABLE),
                     HomeCardModel(app.profile.id, HomeCard.CARD_EVENTS),
-                    HomeCardModel(app.profile.id, HomeCard.CARD_GRADES)
+                    HomeCardModel(app.profile.id, HomeCard.CARD_GRADES),
+                    HomeCardModel(app.profile.id, HomeCard.CARD_NOTES),
             )
             app.config.forProfile().ui.homeCards = app.config.forProfile().ui.homeCards.toMutableList().also { it.addAll(cards) }
         }
@@ -157,6 +158,7 @@ class HomeFragment : Fragment(), CoroutineScope {
                 HomeCard.CARD_TIMETABLE -> HomeTimetableCard(it.cardId, app, activity, this, app.profile)
                 HomeCard.CARD_GRADES -> HomeGradesCard(it.cardId, app, activity, this, app.profile)
                 HomeCard.CARD_EVENTS -> HomeEventsCard(it.cardId, app, activity, this, app.profile)
+                HomeCard.CARD_NOTES -> HomeNotesCard(it.cardId, app, activity, this, app.profile)
                 else -> null
             } as HomeCard?
         }

app/src/main/java/pl/szczodrzynski/edziennik/ui/home/cards/HomeEventsCard.kt

@@ -66,7 +66,7 @@ class HomeEventsCard(
                 showTime = false,
                 showSubject = false,
                 markAsSeen = false,
-                onItemClick = {
+                onEventClick = {
                     EventDetailsDialog(
                             activity,
                             it
@@ -82,6 +82,10 @@ class HomeEventsCard(
         )
 
         app.db.eventDao().getNearestNotDone(profile.id, Date.getToday(), 4).observe(activity, Observer { events ->
+            events.forEach {
+                it.filterNotes()
+            }
+
             adapter.setAllItems(events)
             if (b.eventsView.adapter == null) {
                 b.eventsView.adapter = adapter

app/src/main/java/pl/szczodrzynski/edziennik/ui/home/cards/HomeNotesCard.kt

@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-28.
+ */
+
+package pl.szczodrzynski.edziennik.ui.home.cards
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.FrameLayout
+import androidx.core.view.isVisible
+import androidx.core.view.plusAssign
+import androidx.core.view.setMargins
+import androidx.recyclerview.widget.LinearLayoutManager
+import kotlinx.coroutines.*
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.MainActivity
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
+import pl.szczodrzynski.edziennik.data.db.entity.Profile
+import pl.szczodrzynski.edziennik.databinding.CardHomeNotesBinding
+import pl.szczodrzynski.edziennik.ext.dp
+import pl.szczodrzynski.edziennik.ext.onClick
+import pl.szczodrzynski.edziennik.ui.home.HomeCard
+import pl.szczodrzynski.edziennik.ui.home.HomeCardAdapter
+import pl.szczodrzynski.edziennik.ui.home.HomeFragment
+import pl.szczodrzynski.edziennik.ui.notes.NoteDetailsDialog
+import pl.szczodrzynski.edziennik.ui.notes.NoteEditorDialog
+import pl.szczodrzynski.edziennik.ui.notes.NoteListAdapter
+import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+import kotlin.coroutines.CoroutineContext
+
+class HomeNotesCard(
+    override val id: Int,
+    val app: App,
+    val activity: MainActivity,
+    val fragment: HomeFragment,
+    val profile: Profile,
+) : HomeCard, CoroutineScope {
+    companion object {
+        private const val TAG = "HomeNotesCard"
+    }
+
+    private var job: Job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    private val manager
+        get() = app.noteManager
+
+    private lateinit var adapter: NoteListAdapter
+
+    private fun onNoteClick(note: Note) = launch {
+        val owner = withContext(Dispatchers.IO) {
+            manager.getOwner(note)
+        } as? Noteable
+
+        NoteDetailsDialog(
+            activity = activity,
+            owner = owner,
+            note = note,
+        ).show()
+    }
+
+    private fun onNoteAddClick(view: View?) {
+        NoteEditorDialog(
+            activity = activity,
+            owner = null,
+            editingNote = null,
+            profileId = profile.id,
+        ).show()
+    }
+
+    override fun bind(position: Int, holder: HomeCardAdapter.ViewHolder) { launch {
+        holder.root.removeAllViews()
+        val b = CardHomeNotesBinding.inflate(LayoutInflater.from(holder.root.context))
+        b.root.layoutParams = FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT).apply {
+            setMargins(8.dp)
+        }
+        holder.root += b.root
+
+        adapter = NoteListAdapter(
+            activity = activity,
+            onNoteClick = this@HomeNotesCard::onNoteClick,
+            onNoteEditClick = null,
+        )
+
+        app.db.noteDao().getAllNoOwner(profileId = profile.id).observe(activity) { notes ->
+
+            // show/hide relevant views
+            b.list.isVisible = notes.isNotEmpty()
+            b.noData.isVisible = notes.isEmpty()
+            if (notes.isEmpty()) {
+                return@observe
+            }
+
+            // apply the new note list
+            adapter.setAllItems(notes.take(4))
+
+            // configure the adapter & recycler view
+            if (b.list.adapter == null) {
+                b.list.adapter = adapter
+                b.list.apply {
+                    //setHasFixedSize(true)
+                    isNestedScrollingEnabled = false
+                    layoutManager = LinearLayoutManager(context)
+                    addItemDecoration(SimpleDividerItemDecoration(context))
+                }
+            } else {
+                adapter.notifyDataSetChanged()
+            }
+        }
+
+        b.addNote.onClick(this@HomeNotesCard::onNoteAddClick)
+
+        holder.root.onClick {
+            activity.loadTarget(MainActivity.DRAWER_ITEM_AGENDA)
+        }
+    }}
+
+    override fun unbind(position: Int, holder: HomeCardAdapter.ViewHolder) = Unit
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/homework/HomeworkListFragment.kt

@@ -64,7 +64,7 @@ class HomeworkListFragment : LazyFragment(), CoroutineScope {
             showSubject = true,
             markAsSeen = true,
             isReversed = homeworkDate == HomeworkDate.PAST,
-            onItemClick = {
+            onEventClick = {
                 EventDetailsDialog(
                     activity,
                     it
@@ -82,6 +82,10 @@ class HomeworkListFragment : LazyFragment(), CoroutineScope {
         app.db.eventDao().getAllByType(App.profileId, Event.TYPE_HOMEWORK, filter).observe(this@HomeworkListFragment, Observer { events ->
             if (!isAdded) return@Observer
 
+            events.forEach {
+                it.filterNotes()
+            }
+
             // show/hide relevant views
             setSwipeToRefresh(events.isEmpty())
             b.progressBar.isVisible = false

app/src/main/java/pl/szczodrzynski/edziennik/ui/messages/list/MessageViewHolder.kt

@@ -19,6 +19,7 @@ import pl.szczodrzynski.edziennik.ext.onClick
 import pl.szczodrzynski.edziennik.ext.resolveAttr
 import pl.szczodrzynski.edziennik.ui.grades.viewholder.BindableViewHolder
 import pl.szczodrzynski.edziennik.ui.messages.MessagesUtils
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.edziennik.utils.models.Date
 
 class MessageViewHolder(
@@ -73,7 +74,10 @@ class MessageViewHolder(
             color = colorHighlight
         )
 
-        adapter.onItemClick?.let { listener ->
+        if (adapter.showNotes)
+            NoteManager.prependIcon(item, b.messageSubject)
+
+        adapter.onMessageClick?.let { listener ->
             b.root.onClick { listener(item) }
         }
         adapter.onStarClick?.let { listener ->

app/src/main/java/pl/szczodrzynski/edziennik/ui/messages/list/MessagesAdapter.kt

@@ -13,7 +13,8 @@ import pl.szczodrzynski.edziennik.ui.search.SearchableAdapter
 class MessagesAdapter(
     val activity: AppCompatActivity,
     val teachers: List<Teacher>,
-    val onItemClick: ((item: MessageFull) -> Unit)? = null,
+    val showNotes: Boolean = true,
+    val onMessageClick: ((item: MessageFull) -> Unit)? = null,
     val onStarClick: ((item: MessageFull) -> Unit)? = null,
 ) : SearchableAdapter<MessageFull>() {
     companion object {

app/src/main/java/pl/szczodrzynski/edziennik/ui/messages/list/MessagesListFragment.kt

@@ -62,7 +62,7 @@ class MessagesListFragment : LazyFragment(), CoroutineScope {
             app.db.teacherDao().getAllNow(App.profileId)
         }
 
-        adapter = MessagesAdapter(activity, teachers, onItemClick = {
+        adapter = MessagesAdapter(activity, teachers, onMessageClick = {
             val (target, args) =
                 if (it.isDraft) {
                     TARGET_MESSAGES_COMPOSE to Bundle("message" to app.gson.toJson(it))
@@ -81,6 +81,8 @@ class MessagesListFragment : LazyFragment(), CoroutineScope {
                 return@Observer
 
             messages.forEach { message ->
+                message.filterNotes()
+
                 // uh oh, so these are the workarounds ??
                 message.recipients?.removeAll { it.profileId != message.profileId }
                 message.recipients?.forEach { recipient ->

app/src/main/java/pl/szczodrzynski/edziennik/ui/messages/single/MessageFragment.kt

@@ -30,6 +30,7 @@ import pl.szczodrzynski.edziennik.ext.*
 import pl.szczodrzynski.edziennik.ui.dialogs.settings.MessagesConfigDialog
 import pl.szczodrzynski.edziennik.ui.messages.MessagesUtils
 import pl.szczodrzynski.edziennik.ui.messages.list.MessagesFragment
+import pl.szczodrzynski.edziennik.ui.notes.setupNotesButton
 import pl.szczodrzynski.edziennik.utils.Anim
 import pl.szczodrzynski.edziennik.utils.BetterLink
 import pl.szczodrzynski.edziennik.utils.html.BetterHtml
@@ -266,6 +267,13 @@ class MessageFragment : Fragment(), CoroutineScope {
         b.progress.visibility = View.GONE
         Anim.fadeIn(b.content, 200, null)
         MessagesFragment.pageSelection = min(message.type, 1)
+
+        b.notesButton.setupNotesButton(
+            activity = activity,
+            owner = message,
+            onShowListener = null,
+            onDismissListener = null,
+        )
     }
 
     private fun showAttachments() {

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NoteCategoryViewHolder.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-27.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.Binding
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.databinding.NoteListCategoryItemBinding
+import pl.szczodrzynski.edziennik.ext.resolveDrawable
+import pl.szczodrzynski.edziennik.ui.grades.viewholder.BindableViewHolder
+
+class NoteCategoryViewHolder(
+    inflater: LayoutInflater,
+    parent: ViewGroup,
+    val b: NoteListCategoryItemBinding = NoteListCategoryItemBinding.inflate(
+        inflater,
+        parent,
+        false,
+    ),
+) : RecyclerView.ViewHolder(b.root), BindableViewHolder<Note, NoteListAdapter> {
+    companion object {
+        private const val TAG = "NoteCategoryViewHolder"
+    }
+
+    override fun onBind(
+        activity: AppCompatActivity,
+        app: App,
+        item: Note,
+        position: Int,
+        adapter: NoteListAdapter,
+    ) {
+        val manager = app.noteManager
+        val title = b.root as? TextView ?: return
+        val ownerType = item.ownerType ?: return
+
+        title.setText(manager.getOwnerTypeText(ownerType))
+        title.setCompoundDrawables(
+            manager.getOwnerTypeImage(ownerType).resolveDrawable(activity),
+            null,
+            null,
+            null,
+        )
+        Binding.drawableLeftAutoSize(title, enable = true)
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NoteDetailsDialog.kt

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-24.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.view.LayoutInflater
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
+import pl.szczodrzynski.edziennik.databinding.NoteDetailsDialogBinding
+import pl.szczodrzynski.edziennik.ext.*
+import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
+import pl.szczodrzynski.edziennik.utils.models.Date
+
+class NoteDetailsDialog(
+    activity: AppCompatActivity,
+    private val owner: Noteable?,
+    private var note: Note,
+    onShowListener: ((tag: String) -> Unit)? = null,
+    onDismissListener: ((tag: String) -> Unit)? = null,
+) : BindingDialog<NoteDetailsDialogBinding>(activity, onShowListener, onDismissListener) {
+
+    override val TAG = "NoteDetailsDialog"
+
+    override fun getTitleRes(): Int? = null
+    override fun inflate(layoutInflater: LayoutInflater) =
+        NoteDetailsDialogBinding.inflate(layoutInflater)
+
+    override fun getPositiveButtonText() = R.string.close
+    override fun getNeutralButtonText() = if (note.canEdit) R.string.homework_edit else null
+
+    private val manager
+        get() = app.noteManager
+
+    override suspend fun onNeutralClick(): Boolean {
+        NoteEditorDialog(
+            activity = activity,
+            owner = owner,
+            editingNote = note,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        ).show()
+        return NO_DISMISS
+    }
+
+    override suspend fun onShow() {
+        manager.configureHeader(activity, owner, b.header)
+
+        b.idsLayout.isVisible = App.devMode
+
+        // watch the note for changes
+        app.db.noteDao().get(note.profileId, note.id).observe(activity) {
+            if (it == null) {
+                dismiss()
+                return@observe
+            }
+            note = it
+            update()
+        }
+    }
+
+    private fun update() {
+        b.note = note
+
+        if (note.color != null) {
+            dialog.overlayBackgroundColor(note.color!!.toInt(), 0x50)
+        } else {
+            dialog.overlayBackgroundColor(0, 0)
+        }
+
+        b.addedBy.setText(
+            when (note.sharedBy) {
+                null -> R.string.notes_added_by_you_format
+                "self" -> R.string.event_details_shared_by_self_format
+                else -> R.string.event_details_shared_by_format
+            },
+            Date.fromMillis(note.addedDate).formattedString,
+            note.sharedByName ?: "",
+        )
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NoteEditorDialog.kt

@@ -0,0 +1,197 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-24.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.view.LayoutInflater
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.mikepenz.iconics.IconicsDrawable
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import com.mikepenz.iconics.utils.colorInt
+import com.mikepenz.iconics.utils.sizeDp
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
+import pl.szczodrzynski.edziennik.data.db.entity.Profile
+import pl.szczodrzynski.edziennik.databinding.NoteEditorDialogBinding
+import pl.szczodrzynski.edziennik.ext.isNotNullNorBlank
+import pl.szczodrzynski.edziennik.ext.resolveString
+import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
+import pl.szczodrzynski.edziennik.ui.dialogs.settings.RegistrationConfigDialog
+import pl.szczodrzynski.edziennik.utils.TextInputDropDown
+import pl.szczodrzynski.edziennik.utils.managers.TextStylingManager.HtmlMode
+import pl.szczodrzynski.edziennik.utils.managers.TextStylingManager.StylingConfigBase
+import kotlin.coroutines.resume
+import kotlin.coroutines.suspendCoroutine
+
+class NoteEditorDialog(
+    activity: AppCompatActivity,
+    private val owner: Noteable?,
+    private val editingNote: Note?,
+    private val profileId: Int =
+        owner?.getNoteOwnerProfileId()
+            ?: editingNote?.profileId
+            ?: 0,
+    onShowListener: ((tag: String) -> Unit)? = null,
+    onDismissListener: ((tag: String) -> Unit)? = null,
+) : BindingDialog<NoteEditorDialogBinding>(activity, onShowListener, onDismissListener) {
+
+    override val TAG = "NoteEditorDialog"
+
+    override fun getTitleRes(): Int? = null
+    override fun inflate(layoutInflater: LayoutInflater) =
+        NoteEditorDialogBinding.inflate(layoutInflater)
+
+    override fun isCancelable() = false
+    override fun getPositiveButtonText() = R.string.save
+    override fun getNeutralButtonText() = if (editingNote != null) R.string.remove else null
+    override fun getNegativeButtonText() = R.string.cancel
+
+    private lateinit var topicStylingConfig: StylingConfigBase
+    private lateinit var bodyStylingConfig: StylingConfigBase
+    private val manager
+        get() = app.noteManager
+    private val textStylingManager
+        get() = app.textStylingManager
+
+    private var progressDialog: AlertDialog? = null
+
+    override suspend fun onPositiveClick(): Boolean {
+        val profile = withContext(Dispatchers.IO) {
+            app.db.profileDao().getByIdNow(profileId)
+        } ?: return NO_DISMISS
+
+        val note = buildNote(profile) ?: return NO_DISMISS
+
+        if (note.isShared && !profile.canShare) {
+            RegistrationConfigDialog(activity, profile, onChangeListener = { enabled ->
+                if (enabled)
+                    onPositiveClick()
+            }).showNoteShareDialog()
+            return NO_DISMISS
+        }
+
+        if (note.isShared || editingNote?.isShared == true) {
+            progressDialog = MaterialAlertDialogBuilder(activity)
+                .setTitle(R.string.please_wait)
+                .setMessage(when (note.isShared) {
+                    true -> R.string.notes_editor_progress_sharing
+                    false -> R.string.notes_editor_progress_unsharing
+                })
+                .setCancelable(false)
+                .show()
+        }
+
+        val success = manager.saveNote(activity, note, wasShared = editingNote?.isShared ?: false)
+        progressDialog?.dismiss()
+        return success
+    }
+
+    override suspend fun onNeutralClick(): Boolean {
+        // editingNote cannot be null, as the button is visible
+
+        val confirmation = suspendCoroutine<Boolean> { cont ->
+            var result = false
+            MaterialAlertDialogBuilder(activity)
+                .setTitle(R.string.are_you_sure)
+                .setMessage(R.string.notes_editor_confirmation_text)
+                .setPositiveButton(R.string.yes) { _, _ -> result = true }
+                .setNegativeButton(R.string.no, null)
+                .setOnDismissListener { cont.resume(result) }
+                .show()
+        }
+        if (!confirmation)
+            return NO_DISMISS
+
+        if (editingNote?.isShared == true) {
+            progressDialog = MaterialAlertDialogBuilder(activity)
+                .setTitle(R.string.please_wait)
+                .setMessage(R.string.notes_editor_progress_unsharing)
+                .setCancelable(false)
+                .show()
+        }
+
+        val success = manager.deleteNote(activity, editingNote ?: return NO_DISMISS)
+        progressDialog?.dismiss()
+        return success
+    }
+
+    override suspend fun onShow() {
+        manager.configureHeader(activity, owner, b.header)
+
+        topicStylingConfig = StylingConfigBase(editText = b.topic, htmlMode = HtmlMode.SIMPLE)
+        bodyStylingConfig = StylingConfigBase(editText = b.body, htmlMode = HtmlMode.SIMPLE)
+
+        b.ownerType = owner?.getNoteType() ?: Note.OwnerType.NONE
+        b.editingNote = editingNote
+
+        b.color.clear().append(Note.Color.values().map { color ->
+            TextInputDropDown.Item(
+                id = color.value ?: 0L,
+                text = color.stringRes.resolveString(activity),
+                tag = color,
+                icon = if (color.value != null)
+                    IconicsDrawable(activity).apply {
+                        icon = CommunityMaterial.Icon.cmd_circle
+                        sizeDp = 24
+                        colorInt = color.value.toInt()
+                    } else null,
+            )
+        })
+        b.color.select(id = editingNote?.color ?: 0L)
+
+        textStylingManager.attachToField(
+            activity = activity,
+            textLayout = b.topicLayout,
+            textEdit = b.topic,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        )
+        textStylingManager.attachToField(
+            activity = activity,
+            textLayout = b.bodyLayout,
+            textEdit = b.body,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        )
+    }
+
+    private fun buildNote(profile: Profile): Note? {
+        val ownerType = owner?.getNoteType() ?: Note.OwnerType.NONE
+        val topic = b.topic.text?.toString()
+        val body = b.body.text?.toString()
+        val color = b.color.selected?.tag as? Note.Color
+
+        val share = b.shareSwitch.isChecked && ownerType.isShareable
+        val replace = b.replaceSwitch.isChecked && ownerType.canReplace
+
+        if (body.isNullOrBlank()) {
+            b.bodyLayout.error = app.getString(R.string.notes_editor_body_error)
+            b.body.requestFocus()
+            return null
+        }
+
+        val topicHtml = if (topic.isNotNullNorBlank())
+            textStylingManager.getHtmlText(topicStylingConfig)
+        else null
+        val bodyHtml = textStylingManager.getHtmlText(bodyStylingConfig)
+
+        return Note(
+            profileId = profile.id,
+            id = editingNote?.id ?: System.currentTimeMillis(),
+            ownerType = owner?.getNoteType(),
+            ownerId = owner?.getNoteOwnerId(),
+            replacesOriginal = replace,
+            topic = topicHtml,
+            body = bodyHtml,
+            color = color?.value,
+            sharedBy = if (share) "self" else null,
+            sharedByName = if (share) profile.studentNameLong else null,
+        )
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NoteListAdapter.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-23.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.ui.search.SearchableAdapter
+
+class NoteListAdapter(
+    val activity: AppCompatActivity,
+    val onNoteClick: ((note: Note) -> Unit)? = null,
+    val onNoteEditClick: ((note: Note) -> Unit)? = null,
+) : SearchableAdapter<Note>() {
+    companion object {
+        private const val TAG = "NoteListAdapter"
+        private const val ITEM_TYPE_NOTE = 0
+        private const val ITEM_TYPE_CATEGORY = 1
+    }
+
+    private val app = activity.applicationContext as App
+
+    override fun getItemViewType(item: Note) = when {
+        item.isCategoryItem -> ITEM_TYPE_CATEGORY
+        else -> ITEM_TYPE_NOTE
+    }
+
+    override fun onBindViewHolder(
+        holder: RecyclerView.ViewHolder,
+        position: Int,
+        item: Note,
+    ) {
+        when (holder) {
+            is NoteViewHolder -> holder.onBind(activity, app, item, position, this)
+            is NoteCategoryViewHolder -> holder.onBind(activity, app, item, position, this)
+        }
+    }
+
+    override fun onCreateViewHolder(
+        inflater: LayoutInflater,
+        parent: ViewGroup,
+        viewType: Int,
+    ): RecyclerView.ViewHolder = when (viewType) {
+        ITEM_TYPE_CATEGORY -> NoteCategoryViewHolder(inflater, parent)
+        else -> NoteViewHolder(inflater, parent)
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NoteListDialog.kt

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-23.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.view.LayoutInflater
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.LinearLayoutManager
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
+import pl.szczodrzynski.edziennik.databinding.NoteListDialogBinding
+import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
+import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+
+class NoteListDialog(
+    activity: AppCompatActivity,
+    private val owner: Noteable,
+    onShowListener: ((tag: String) -> Unit)? = null,
+    onDismissListener: ((tag: String) -> Unit)? = null,
+) : BindingDialog<NoteListDialogBinding>(activity, onShowListener, onDismissListener) {
+
+    override val TAG = "NoteListDialog"
+
+    override fun getTitleRes(): Int? = null
+    override fun inflate(layoutInflater: LayoutInflater) =
+        NoteListDialogBinding.inflate(layoutInflater)
+
+    override fun getPositiveButtonText() = R.string.close
+    override fun getNeutralButtonText() = R.string.add
+
+    private val manager
+        get() = app.noteManager
+
+    private lateinit var adapter: NoteListAdapter
+
+    override suspend fun onNeutralClick(): Boolean {
+        NoteEditorDialog(
+            activity = activity,
+            owner = owner,
+            editingNote = null,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        ).show()
+        return NO_DISMISS
+    }
+
+    override suspend fun onShow() {
+        manager.configureHeader(activity, owner, b.header)
+
+        adapter = NoteListAdapter(
+            activity = activity,
+            onNoteClick = {
+                NoteDetailsDialog(
+                    activity = activity,
+                    owner = owner,
+                    note = it,
+                    onShowListener = onShowListener,
+                    onDismissListener = onDismissListener,
+                ).show()
+            },
+            onNoteEditClick = {
+                NoteEditorDialog(
+                    activity = activity,
+                    owner = owner,
+                    editingNote = it,
+                    onShowListener = onShowListener,
+                    onDismissListener = onDismissListener,
+                ).show()
+            },
+        )
+
+        app.db.noteDao().getAllFor(
+            profileId = owner.getNoteOwnerProfileId(),
+            ownerType = owner.getNoteType(),
+            ownerId = owner.getNoteOwnerId()
+        ).observe(activity) { notes ->
+
+            // show/hide relevant views
+            b.noteListLayout.isVisible = notes.isNotEmpty()
+            b.noData.isVisible = notes.isEmpty()
+            if (notes.isEmpty()) {
+                return@observe
+            }
+
+            // apply the new note list
+            adapter.setAllItems(notes)
+
+            // configure the adapter & recycler view
+            if (b.noteList.adapter == null) {
+                b.noteList.adapter = adapter
+                b.noteList.apply {
+                    //setHasFixedSize(true)
+                    isNestedScrollingEnabled = false
+                    layoutManager = LinearLayoutManager(context)
+                    addItemDecoration(SimpleDividerItemDecoration(context))
+                }
+            } else {
+                adapter.notifyDataSetChanged()
+            }
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NoteViewHolder.kt

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-23.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.graphics.drawable.ColorDrawable
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.graphics.ColorUtils
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.databinding.NoteListItemBinding
+import pl.szczodrzynski.edziennik.ext.*
+import pl.szczodrzynski.edziennik.ui.grades.viewholder.BindableViewHolder
+import pl.szczodrzynski.edziennik.utils.models.Date
+
+class NoteViewHolder(
+    inflater: LayoutInflater,
+    parent: ViewGroup,
+    val b: NoteListItemBinding = NoteListItemBinding.inflate(inflater, parent, false),
+) : RecyclerView.ViewHolder(b.root), BindableViewHolder<Note, NoteListAdapter> {
+    companion object {
+        private const val TAG = "NoteViewHolder"
+    }
+
+    override fun onBind(
+        activity: AppCompatActivity,
+        app: App,
+        item: Note,
+        position: Int,
+        adapter: NoteListAdapter,
+    ) {
+        val colorHighlight = R.attr.colorControlHighlight.resolveAttr(activity)
+        val addedDate = Date.fromMillis(item.addedDate).formattedString
+
+        b.topic.text = adapter.highlightSearchText(
+            item = item,
+            text = item.topicHtml ?: item.bodyHtml,
+            color = colorHighlight,
+        )
+
+        if (item.color != null) {
+            b.colorLayout.background =
+                ColorDrawable(ColorUtils.setAlphaComponent(item.color.toInt(), 0x50))
+        } else {
+            b.colorLayout.background = null
+        }
+
+        if (item.sharedBy != null && item.sharedByName != null) {
+            b.addedBy.text = listOf<CharSequence>(
+                "{cmd-share-variant}",
+                item.sharedByName,
+                "•",
+                addedDate,
+            ).concat(" ")
+
+            // workaround for the span data lost during setText above
+            val sharedBySpanned = adapter.highlightSearchText(
+                item = item,
+                text = item.sharedByName,
+                color = colorHighlight,
+            )
+            b.addedBy.text = b.addedBy.text.replaceSpanned(item.sharedByName, sharedBySpanned)
+        } else {
+            b.addedBy.setText(R.string.notes_added_by_you_format, addedDate)
+        }
+
+        b.editButton.isVisible = item.canEdit && adapter.onNoteEditClick != null
+
+        if (adapter.onNoteClick != null)
+            b.root.onClick {
+                adapter.onNoteClick.invoke(item)
+            }
+        if (adapter.onNoteEditClick != null)
+            b.editButton.onClick {
+                adapter.onNoteEditClick.invoke(item)
+            }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NotesExtensions.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-23.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.view.Gravity
+import android.widget.LinearLayout
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
+import androidx.core.view.updateLayoutParams
+import androidx.core.view.updatePadding
+import com.google.android.material.button.MaterialButton
+import com.mikepenz.iconics.IconicsDrawable
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
+import pl.szczodrzynski.edziennik.ext.dp
+import pl.szczodrzynski.edziennik.ext.onClick
+
+fun MaterialButton.setupNotesButton(
+    activity: AppCompatActivity,
+    owner: Noteable,
+    onShowListener: ((tag: String) -> Unit)? = null,
+    onDismissListener: ((tag: String) -> Unit)? = null,
+) {
+    if (!isVisible)
+        return
+    icon = IconicsDrawable(activity, CommunityMaterial.Icon3.cmd_playlist_edit)
+    setText(R.string.notes_button)
+    iconPadding = 8.dp
+    iconSize = 24.dp
+
+    updateLayoutParams<LinearLayout.LayoutParams> {
+        gravity = Gravity.CENTER_HORIZONTAL
+    }
+    updatePadding(left = 12.dp)
+
+    onClick {
+        NoteListDialog(
+            activity = activity,
+            owner = owner,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        ).show()
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/notes/NotesFragment.kt

@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-27.
+ */
+
+package pl.szczodrzynski.edziennik.ui.notes
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.isVisible
+import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import kotlinx.coroutines.*
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.MainActivity
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
+import pl.szczodrzynski.edziennik.databinding.NotesFragmentBinding
+import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+import kotlin.coroutines.CoroutineContext
+
+class NotesFragment : Fragment(), CoroutineScope {
+    companion object {
+        private const val TAG = "NotesFragment"
+    }
+
+    private lateinit var app: App
+    private lateinit var activity: MainActivity
+    private lateinit var b: NotesFragmentBinding
+
+    private val job: Job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    private val manager
+        get() = app.noteManager
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?,
+    ): View? {
+        activity = getActivity() as? MainActivity ?: return null
+        context ?: return null
+        app = activity.application as App
+        b = NotesFragmentBinding.inflate(inflater)
+        return b.root
+    }
+
+    private fun onNoteClick(note: Note) = launch {
+        val owner = withContext(Dispatchers.IO) {
+            manager.getOwner(note)
+        } as? Noteable
+
+        NoteDetailsDialog(
+            activity = activity,
+            owner = owner,
+            note = note,
+        ).show()
+    }
+
+    private fun onNoteEditClick(note: Note) = launch {
+        val owner = withContext(Dispatchers.IO) {
+            manager.getOwner(note)
+        } as? Noteable
+
+        NoteEditorDialog(
+            activity = activity,
+            owner = owner,
+            editingNote = note,
+            profileId = App.profileId,
+        ).show()
+    }
+
+    private fun onNoteAddClick(view: View?) {
+        NoteEditorDialog(
+            activity = activity,
+            owner = null,
+            editingNote = null,
+            profileId = App.profileId,
+        ).show()
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        if (!isAdded) return
+
+        activity.navView.apply {
+            bottomBar.apply {
+                fabEnable = true
+                fabExtendedText = getString(R.string.notes_action_add)
+                fabIcon = CommunityMaterial.Icon3.cmd_text_box_plus_outline
+            }
+
+            setFabOnClickListener(this@NotesFragment::onNoteAddClick)
+        }
+        activity.gainAttentionFAB()
+
+        val adapter = NoteListAdapter(
+            activity = activity,
+            onNoteClick = this::onNoteClick,
+            onNoteEditClick = this::onNoteEditClick,
+        )
+
+        app.db.noteDao().getAll(profileId = App.profileId).observe(activity) { allNotes ->
+            if (!isAdded) return@observe
+
+            // show/hide relevant views
+            b.progressBar.isVisible = false
+            b.list.isVisible = allNotes.isNotEmpty()
+            b.noData.isVisible = allNotes.isEmpty()
+            if (allNotes.isEmpty()) {
+                return@observe
+            }
+
+            val notes = allNotes.groupBy { it.ownerType }.flatMap { (ownerType, notes) ->
+                if (ownerType != null) {
+                    // construct a dummy note, used as the category separator
+                    val categoryItem = Note(
+                        profileId = 0,
+                        id = 0,
+                        ownerType = ownerType,
+                        ownerId = 0,
+                        topic = null,
+                        body = "",
+                        color = null,
+                    )
+                    categoryItem.isCategoryItem = true
+                    val mutableNotes = notes.toMutableList()
+                    mutableNotes.add(0, categoryItem)
+                    return@flatMap mutableNotes
+                }
+                return@flatMap notes
+            }
+
+            // apply the new note list
+            adapter.setAllItems(notes, addSearchField = true)
+
+            // configure the adapter & recycler view
+            if (b.list.adapter == null) {
+                b.list.adapter = adapter
+                b.list.apply {
+                    //setHasFixedSize(true)
+                    isNestedScrollingEnabled = false
+                    layoutManager = LinearLayoutManager(context)
+                    addItemDecoration(SimpleDividerItemDecoration(context))
+                }
+            }
+
+            // reapply the filter
+            adapter.getSearchField()?.applyTo(adapter)
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/search/SearchFilter.kt

@@ -59,14 +59,15 @@ class SearchFilter<T : Searchable<T>>(
         }
 
         val newItems = allItems.mapNotNull { item ->
-            if (item is SearchField) {
+            // get all keyword sets from the entity
+            val searchKeywords = item.searchKeywords
+            // keep the SearchField and items having no keywords
+            if (item is SearchField || searchKeywords.isEmpty()) {
                 return@mapNotNull item
             }
             item.searchPriority = NO_MATCH
             item.searchHighlightText = null
 
-            // get all keyword sets from the entity
-            val searchKeywords = item.searchKeywords
             // a temporary variable for the loops below
             var matchWeight: Int
 

app/src/main/java/pl/szczodrzynski/edziennik/ui/settings/cards/SettingsRegisterCard.kt

@@ -10,7 +10,6 @@ import eu.szkolny.font.SzkolnyFont
 import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.api.LOGIN_TYPE_LIBRUS
-import pl.szczodrzynski.edziennik.data.db.entity.Profile.Companion.REGISTRATION_ENABLED
 import pl.szczodrzynski.edziennik.ext.after
 import pl.szczodrzynski.edziennik.ui.dialogs.settings.*
 import pl.szczodrzynski.edziennik.ui.settings.SettingsCard
@@ -83,36 +82,39 @@ class SettingsRegisterCard(util: SettingsUtil) : SettingsCard(util) {
             AttendanceConfigDialog(activity, reloadOnDismiss = false).show()
         },
 
-        util.createPropertyItem(
+        if (app.profile.archived)
-            text = R.string.settings_register_allow_registration_text,
+            null
-            subText = R.string.settings_register_allow_registration_subtext,
+        else
-            icon = CommunityMaterial.Icon.cmd_account_circle_outline,
+            util.createPropertyItem(
-            value = app.profile.registration == REGISTRATION_ENABLED,
+                text = R.string.settings_register_allow_registration_text,
-            beforeChange = { item, value ->
+                subText = R.string.settings_register_allow_registration_subtext,
-                if (app.profile.registration == REGISTRATION_ENABLED == value)
+                icon = CommunityMaterial.Icon.cmd_account_circle_outline,
-                // allow the switch to change - needed for util.refresh() to change the visual state
+                value = app.profile.canShare,
-                    return@createPropertyItem true
+                beforeChange = { item, value ->
-                val dialog =
+                    if (app.profile.canShare == value)
-                    RegistrationConfigDialog(activity, app.profile, onChangeListener = { enabled ->
+                    // allow the switch to change - needed for util.refresh() to change the visual state
-                        if (item.isChecked == enabled)
+                        return@createPropertyItem true
-                            return@RegistrationConfigDialog
+                    val dialog =
-                        item.isChecked = enabled
+                        RegistrationConfigDialog(activity, app.profile, onChangeListener = { enabled ->
-                        if (value) {
+                            if (item.isChecked == enabled)
-                            card.items.after(item, sharedEventsItem)
+                                return@RegistrationConfigDialog
-                        } else {
+                            item.isChecked = enabled
-                            card.items.remove(sharedEventsItem)
+                            if (value) {
-                        }
+                                card.items.after(item, sharedEventsItem)
-                        util.refresh()
+                            } else {
-                    })
+                                card.items.remove(sharedEventsItem)
-                if (value)
+                            }
-                    dialog.showEnableDialog()
+                            util.refresh()
-                else
+                        })
-                    dialog.showDisableDialog()
+                    if (value)
-                false
+                        dialog.showEnableDialog()
-            }
+                    else
-        ) { _, _ -> },
+                        dialog.showDisableDialog()
+                    false
+                }
+            ) { _, _ -> },
 
-        if (app.profile.registration == REGISTRATION_ENABLED)
+        if (app.profile.canShare)
             sharedEventsItem
         else
             null

app/src/main/java/pl/szczodrzynski/edziennik/ui/timetable/LessonDetailsDialog.kt

@@ -26,8 +26,10 @@ import pl.szczodrzynski.edziennik.ui.dialogs.base.BindingDialog
 import pl.szczodrzynski.edziennik.ui.event.EventDetailsDialog
 import pl.szczodrzynski.edziennik.ui.event.EventListAdapter
 import pl.szczodrzynski.edziennik.ui.event.EventManualDialog
+import pl.szczodrzynski.edziennik.ui.notes.setupNotesButton
 import pl.szczodrzynski.edziennik.utils.BetterLink
 import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Week
 
@@ -35,6 +37,7 @@ class LessonDetailsDialog(
     activity: AppCompatActivity,
     private val lesson: LessonFull,
     private val attendance: AttendanceFull? = null,
+    private val showNotes: Boolean = true,
     onShowListener: ((tag: String) -> Unit)? = null,
     onDismissListener: ((tag: String) -> Unit)? = null,
 ) : BindingDialog<DialogLessonDetailsBinding>(activity, onShowListener, onDismissListener) {
@@ -186,7 +189,7 @@ class LessonDetailsDialog(
             showTime = true,
             showSubject = true,
             markAsSeen = true,
-            onItemClick = {
+            onEventClick = {
                 EventDetailsDialog(
                     activity,
                     it,
@@ -210,6 +213,10 @@ class LessonDetailsDialog(
             lessonDate,
             lessonTime
         ).observe(activity) { events ->
+            events.forEach {
+                it.filterNotes()
+            }
+
             adapter.setAllItems(events)
             if (b.eventsView.adapter == null) {
                 b.eventsView.adapter = adapter
@@ -244,5 +251,15 @@ class LessonDetailsDialog(
                 onActionSelected = dialog::dismiss
             )
         }
+
+        b.notesButton.isVisible = showNotes
+        b.notesButton.setupNotesButton(
+            activity = activity,
+            owner = lesson,
+            onShowListener = onShowListener,
+            onDismissListener = onDismissListener,
+        )
+        if (showNotes)
+            NoteManager.setLegendText(lesson, b.legend)
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/timetable/TimetableDayFragment.kt

@@ -33,6 +33,7 @@ import pl.szczodrzynski.edziennik.ext.*
 import pl.szczodrzynski.edziennik.ui.base.lazypager.LazyFragment
 import pl.szczodrzynski.edziennik.ui.timetable.TimetableFragment.Companion.DEFAULT_END_HOUR
 import pl.szczodrzynski.edziennik.ui.timetable.TimetableFragment.Companion.DEFAULT_START_HOUR
+import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Time
 import java.util.*
@@ -103,6 +104,10 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
         // observe lesson database
         app.db.timetableDao().getAllForDate(App.profileId, date).observe(this) { lessons ->
             launch {
+                lessons.forEach {
+                    it.filterNotes()
+                }
+
                 val events = withContext(Dispatchers.Default) {
                     app.db.eventDao().getAllByDateNow(App.profileId, date)
                 }
@@ -281,7 +286,9 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
 
 
             lb.lessonNumber = lesson.displayLessonNumber
-            lb.subjectName.text = lesson.displaySubjectName?.let {
+            val lessonText =
+                lesson.getNoteSubstituteText(showNotes = true) ?: lesson.displaySubjectName
+            lb.subjectName.text = lessonText?.let {
                 if (lesson.type == Lesson.TYPE_CANCELLED || lesson.type == Lesson.TYPE_SHIFTED_SOURCE)
                     it.asStrikethroughSpannable().asColoredSpannable(colorSecondary)
                 else
@@ -290,6 +297,8 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
             lb.detailsFirst.text = listOfNotEmpty(timeRange, classroomInfo).concat(bullet)
             lb.detailsSecond.text = listOfNotEmpty(teacherInfo, teamInfo).concat(bullet)
 
+            NoteManager.prependIcon(lesson, lb.subjectName)
+
             lb.attendanceIcon.isVisible = attendance?.let {
                 val icon = attendanceManager.getAttendanceIcon(it) ?: return@let false
                 val color = attendanceManager.getAttendanceColor(it)

app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/EventManager.kt

@@ -48,12 +48,16 @@ class EventManager(val app: App) : CoroutineScope {
         title: TextView,
         event: EventFull,
         showType: Boolean = true,
+        showNotes: Boolean = true,
         doneIconColor: Int? = null
     ) {
-        val topicSpan = event.topicHtml
+        val topicSpan = event.getNoteSubstituteText(showNotes) ?: event.topicHtml
+        val hasReplacingNotes = event.hasReplacingNotes()
 
         title.text = listOfNotNull(
             if (event.addedManually) "{cmd-clipboard-edit-outline} " else null,
+            if (event.hasNotes() && hasReplacingNotes && showNotes) "{cmd-swap-horizontal} " else null,
+            if (event.hasNotes() && !hasReplacingNotes && showNotes) "{cmd-playlist-edit} " else null,
             if (showType) "${event.typeName ?: "wydarzenie"} - " else null,
             topicSpan,
         ).concat()
@@ -70,10 +74,11 @@ class EventManager(val app: App) : CoroutineScope {
         )
     }
 
-    fun setLegendText(legend: IconicsTextView, event: EventFull) {
+    fun setLegendText(legend: IconicsTextView, event: EventFull, showNotes: Boolean = true) {
         legend.text = listOfNotNull(
             if (event.addedManually) R.string.legend_event_added_manually else null,
-            if (event.isDone) R.string.legend_event_is_done else null
+            if (event.isDone) R.string.legend_event_is_done else null,
+            if (showNotes) NoteManager.getLegendText(event) else null,
         ).map { legend.context.getString(it) }.join("\n")
         legend.isVisible = legend.text.isNotBlank()
     }

app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/NoteManager.kt

@@ -0,0 +1,307 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-10-17.
+ */
+
+package pl.szczodrzynski.edziennik.utils.managers
+
+import android.annotation.SuppressLint
+import android.text.SpannableStringBuilder
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.mikepenz.iconics.view.IconicsTextView
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Note
+import pl.szczodrzynski.edziennik.data.db.entity.Note.OwnerType
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable
+import pl.szczodrzynski.edziennik.data.db.full.*
+import pl.szczodrzynski.edziennik.databinding.NoteDialogHeaderBinding
+import pl.szczodrzynski.edziennik.ext.resolveDrawable
+import pl.szczodrzynski.edziennik.ui.agenda.DayDialog
+import pl.szczodrzynski.edziennik.ui.agenda.lessonchanges.LessonChangesAdapter
+import pl.szczodrzynski.edziennik.ui.announcements.AnnouncementsAdapter
+import pl.szczodrzynski.edziennik.ui.attendance.AttendanceAdapter
+import pl.szczodrzynski.edziennik.ui.attendance.AttendanceDetailsDialog
+import pl.szczodrzynski.edziennik.ui.attendance.AttendanceFragment
+import pl.szczodrzynski.edziennik.ui.behaviour.NoticesAdapter
+import pl.szczodrzynski.edziennik.ui.event.EventDetailsDialog
+import pl.szczodrzynski.edziennik.ui.event.EventListAdapter
+import pl.szczodrzynski.edziennik.ui.grades.GradeDetailsDialog
+import pl.szczodrzynski.edziennik.ui.grades.GradesAdapter
+import pl.szczodrzynski.edziennik.ui.messages.list.MessagesAdapter
+import pl.szczodrzynski.edziennik.ui.timetable.LessonDetailsDialog
+import pl.szczodrzynski.edziennik.utils.models.Date
+
+class NoteManager(private val app: App) {
+    companion object {
+        private const val TAG = "NoteManager"
+
+        @SuppressLint("SetTextI18n")
+        fun prependIcon(owner: Noteable, textView: IconicsTextView) {
+            if (owner.hasNotes())
+                textView.text = SpannableStringBuilder(
+                    if (owner.hasReplacingNotes())
+                        "{cmd-swap-horizontal} "
+                    else
+                        "{cmd-playlist-edit} "
+                ).append(textView.text)
+        }
+
+        fun getLegendText(owner: Noteable): Int? = when {
+            owner.hasReplacingNotes() -> R.string.legend_notes_added_replaced
+            owner.hasNotes() -> R.string.legend_notes_added
+            else -> null
+        }
+
+        fun setLegendText(owner: Noteable, textView: IconicsTextView) {
+            textView.isVisible = owner.hasNotes()
+            textView.setText(getLegendText(owner) ?: return)
+        }
+    }
+
+    fun getOwner(note: Note): Any? {
+        if (note.ownerId == null)
+            return null
+        return when (note.ownerType) {
+            OwnerType.ANNOUNCEMENT ->
+                app.db.announcementDao().getByIdNow(note.profileId, note.ownerId)
+            OwnerType.ATTENDANCE ->
+                app.db.attendanceDao().getByIdNow(note.profileId, note.ownerId)
+            OwnerType.BEHAVIOR ->
+                app.db.noticeDao().getByIdNow(note.profileId, note.ownerId)
+            OwnerType.EVENT ->
+                app.db.eventDao().getByIdNow(note.profileId, note.ownerId)
+            OwnerType.EVENT_SUBJECT, OwnerType.LESSON_SUBJECT ->
+                app.db.subjectDao().getByIdNow(note.profileId, note.ownerId)
+            OwnerType.GRADE ->
+                app.db.gradeDao().getByIdNow(note.profileId, note.ownerId)
+            OwnerType.LESSON ->
+                app.db.timetableDao().getByIdNow(note.profileId, note.ownerId)
+            OwnerType.MESSAGE ->
+                app.db.messageDao().getByIdNow(note.profileId, note.ownerId)
+            else -> null
+        }
+    }
+
+    fun hasValidOwner(note: Note): Boolean {
+        if (note.ownerType == null || note.ownerType == OwnerType.DAY)
+            return true
+        return getOwner(note) != null
+    }
+
+    suspend fun saveNote(activity: AppCompatActivity, note: Note, wasShared: Boolean): Boolean {
+        val success = when {
+            !note.isShared && wasShared -> unshareNote(activity, note)
+            note.isShared -> shareNote(activity, note)
+            else -> true
+        }
+
+        if (!success)
+            return false
+
+        withContext(Dispatchers.IO) {
+            app.db.noteDao().add(note)
+        }
+        return true
+    }
+
+    suspend fun deleteNote(activity: AppCompatActivity, note: Note): Boolean {
+        val success = when {
+            note.isShared -> unshareNote(activity, note)
+            else -> true
+        }
+
+        if (!success)
+            return false
+
+        withContext(Dispatchers.IO) {
+            app.db.noteDao().delete(note)
+        }
+        return true
+    }
+
+    private suspend fun shareNote(activity: AppCompatActivity, note: Note): Boolean {
+        return app.api.runCatching(activity) {
+            shareNote(note)
+        } != null
+    }
+
+    private suspend fun unshareNote(activity: AppCompatActivity, note: Note): Boolean {
+        return app.api.runCatching(activity) {
+            unshareNote(note)
+        } != null
+    }
+
+    private fun getAdapterForItem(
+        activity: AppCompatActivity,
+        item: Noteable,
+    ): RecyclerView.Adapter<*>? {
+        return when (item) {
+            is AnnouncementFull -> AnnouncementsAdapter(activity, mutableListOf(item), null)
+
+            is AttendanceFull -> AttendanceAdapter(
+                activity,
+                showNotes = false,
+                onAttendanceClick = {
+                    showItemDetailsDialog(activity, it)
+                },
+                type = AttendanceFragment.VIEW_LIST
+            ).also {
+                it.items = mutableListOf(item)
+            }
+
+            is NoticeFull -> {
+                NoticesAdapter(activity, listOf(item))
+            }
+
+            is Date -> {
+                TODO("Date adapter is not yet implemented.")
+            }
+
+            is EventFull -> EventListAdapter(
+                activity = activity,
+                simpleMode = true,
+                showDate = true,
+                showColor = false,
+                showTime = false,
+                markAsSeen = false,
+                showNotes = false,
+                onEventClick = {
+                    showItemDetailsDialog(activity, it)
+                },
+            ).also {
+                it.setAllItems(listOf(item))
+            }
+
+            is GradeFull -> GradesAdapter(activity, showNotes = false, onGradeClick = {
+                showItemDetailsDialog(activity, it)
+            }).also {
+                it.items = mutableListOf(item)
+            }
+
+            is LessonFull -> LessonChangesAdapter(activity, showNotes = false, onLessonClick = {
+                showItemDetailsDialog(activity, it)
+            }).also {
+                it.items = listOf(item)
+            }
+
+            is MessageFull -> MessagesAdapter(
+                activity = activity,
+                teachers = listOf(),
+                showNotes = false,
+                onMessageClick = null,
+            ).also {
+                it.setAllItems(listOf(item))
+            }
+            else -> null
+        }
+    }
+
+    private fun showItemDetailsDialog(
+        activity: AppCompatActivity,
+        item: Noteable,
+        onShowListener: ((tag: String) -> Unit)? = null,
+        onDismissListener: ((tag: String) -> Unit)? = null,
+    ) {
+        when (item) {
+            is AnnouncementFull -> return
+            is AttendanceFull -> AttendanceDetailsDialog(
+                activity = activity,
+                attendance = item,
+                showNotes = false,
+                onShowListener = onShowListener,
+                onDismissListener = onDismissListener,
+            ).show()
+            is NoticeFull -> return
+            is Date -> DayDialog(
+                activity = activity,
+                profileId = App.profileId,
+                date = item,
+                showNotes = false,
+                onShowListener = onShowListener,
+                onDismissListener = onDismissListener,
+            ).show()
+            is EventFull -> EventDetailsDialog(
+                activity = activity,
+                event = item,
+                showNotes = false,
+                onShowListener = onShowListener,
+                onDismissListener = onDismissListener,
+            ).show()
+            is GradeFull -> GradeDetailsDialog(
+                activity = activity,
+                grade = item,
+                showNotes = false,
+                onShowListener = onShowListener,
+                onDismissListener = onDismissListener,
+            ).show()
+            is LessonFull -> LessonDetailsDialog(
+                activity = activity,
+                lesson = item,
+                showNotes = false,
+                onShowListener = onShowListener,
+                onDismissListener = onDismissListener,
+            ).show()
+            is MessageFull -> return
+        }
+    }
+
+    fun getOwnerTypeText(owner: OwnerType) = when (owner) {
+        OwnerType.ANNOUNCEMENT -> R.string.notes_type_announcement
+        OwnerType.ATTENDANCE -> R.string.notes_type_attendance
+        OwnerType.BEHAVIOR -> R.string.notes_type_behavior
+        OwnerType.DAY -> R.string.notes_type_day
+        OwnerType.EVENT -> R.string.notes_type_event
+        OwnerType.EVENT_SUBJECT -> TODO()
+        OwnerType.GRADE -> R.string.notes_type_grade
+        OwnerType.LESSON -> R.string.notes_type_lesson
+        OwnerType.LESSON_SUBJECT -> TODO()
+        OwnerType.MESSAGE -> R.string.notes_type_message
+        OwnerType.NONE -> throw Exception("NONE is not a valid OwnerType.")
+    }
+
+    fun getOwnerTypeImage(owner: OwnerType) = when (owner) {
+        OwnerType.ANNOUNCEMENT -> R.drawable.ic_announcement
+        OwnerType.ATTENDANCE -> R.drawable.ic_attendance
+        OwnerType.BEHAVIOR -> R.drawable.ic_behavior
+        OwnerType.DAY -> R.drawable.ic_calendar_day
+        OwnerType.EVENT -> R.drawable.ic_calendar_event
+        OwnerType.EVENT_SUBJECT -> TODO()
+        OwnerType.GRADE -> R.drawable.ic_grade
+        OwnerType.LESSON -> R.drawable.ic_timetable
+        OwnerType.LESSON_SUBJECT -> TODO()
+        OwnerType.MESSAGE -> R.drawable.ic_message
+        OwnerType.NONE -> throw Exception("NONE is not a valid OwnerType.")
+    }
+
+    fun configureHeader(
+        activity: AppCompatActivity,
+        noteOwner: Noteable?,
+        b: NoteDialogHeaderBinding,
+    ) {
+        if (noteOwner == null) {
+            b.title.isVisible = false
+            b.divider.isVisible = false
+            b.ownerItemList.isVisible = false
+            return
+        }
+        b.ownerItemList.apply {
+            adapter = getAdapterForItem(activity, noteOwner)
+            isNestedScrollingEnabled = false
+            //setHasFixedSize(true)
+            layoutManager = LinearLayoutManager(context)
+        }
+
+        b.title.setText(getOwnerTypeText(noteOwner.getNoteType()))
+        b.title.setCompoundDrawables(
+            getOwnerTypeImage(noteOwner.getNoteType()).resolveDrawable(activity),
+            null,
+            null,
+            null,
+        )
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/TextStylingManager.kt

@@ -13,16 +13,22 @@ import android.text.style.UnderlineSpan
 import android.widget.Button
 import android.widget.TextView
 import androidx.annotation.StringRes
+import androidx.appcompat.app.AppCompatActivity
 import androidx.core.text.HtmlCompat
 import androidx.core.view.isVisible
 import androidx.core.widget.addTextChangedListener
 import com.google.android.material.button.MaterialButton
 import com.google.android.material.button.MaterialButtonToggleGroup
+import com.google.android.material.textfield.TextInputLayout
+import com.mikepenz.iconics.IconicsDrawable
 import com.mikepenz.iconics.typeface.IIcon
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import com.mikepenz.iconics.utils.sizeDp
 import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.ext.attachToastHint
 import pl.szczodrzynski.edziennik.ext.hasSet
 import pl.szczodrzynski.edziennik.ext.replaceSpan
+import pl.szczodrzynski.edziennik.ui.dialogs.StyledTextDialog
 import pl.szczodrzynski.edziennik.utils.TextInputKeyboardEdit
 import pl.szczodrzynski.edziennik.utils.html.BetterHtml
 import pl.szczodrzynski.edziennik.utils.managers.TextStylingManager.HtmlMode.*
@@ -271,4 +277,28 @@ class TextStylingManager(private val app: App) {
             it.button.isEnabled = enable
         }
     }
+
+    fun attachToField(
+        activity: AppCompatActivity,
+        textLayout: TextInputLayout,
+        textEdit: TextInputKeyboardEdit,
+        onShowListener: ((tag: String) -> Unit)? = null,
+        onDismissListener: ((tag: String) -> Unit)? = null,
+    ) {
+        textLayout.endIconDrawable = IconicsDrawable(
+            activity,
+            CommunityMaterial.Icon3.cmd_open_in_new
+        ).apply { sizeDp = 24 }
+        textLayout.setEndIconOnClickListener {
+            StyledTextDialog(
+                activity,
+                initialText = textEdit.text,
+                onSuccess = {
+                    textEdit.text = it
+                },
+                onShowListener,
+                onDismissListener
+            ).show()
+        }
+    }
 }

app/src/main/java/pl/szczodrzynski/edziennik/utils/models/Date.java

@@ -6,14 +6,18 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import java.text.DateFormat;
+import java.util.ArrayList;
 import java.util.Calendar;
+import java.util.List;
 import java.util.Locale;
 import java.util.TimeZone;
 
 import pl.szczodrzynski.edziennik.R;
+import pl.szczodrzynski.edziennik.data.db.entity.Note;
+import pl.szczodrzynski.edziennik.data.db.entity.Noteable;
 import pl.szczodrzynski.edziennik.ext.TextExtensionsKt;
 
-public class Date implements Comparable<Date> {
+public class Date implements Comparable<Date>, Noteable {
     public int year = 0;
     public int month = 0;
     public int day = 0;
@@ -374,4 +378,51 @@ public class Date implements Comparable<Date> {
         result = 31 * result + day;
         return result;
     }
+
+    @NonNull
+    @Override
+    public Note.OwnerType getNoteType() {
+        return Note.OwnerType.DAY;
+    }
+
+    @Override
+    public int getNoteOwnerProfileId() {
+        return 0;
+    }
+
+    @Override
+    public long getNoteOwnerId() {
+        return 0;
+    }
+
+    @Nullable
+    @Override
+    public CharSequence getNoteSubstituteText(boolean showNotes) {
+        return null;
+    }
+
+    @NonNull
+    @Override
+    public List<Note> getNotes() {
+        return new ArrayList();
+    }
+
+    @Override
+    public void setNotes(@NonNull List<Note> notes) {
+    }
+
+    @Override
+    public void filterNotes() {
+        Noteable.DefaultImpls.filterNotes(this);
+    }
+
+    @Override
+    public boolean hasNotes() {
+        return Noteable.DefaultImpls.hasNotes(this);
+    }
+
+    @Override
+    public boolean hasReplacingNotes() {
+        return Noteable.DefaultImpls.hasReplacingNotes(this);
+    }
 }

app/src/main/res/drawable/ic_announcement.xml

@@ -0,0 +1,21 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M17.4,33H15v-4h4l0.4,1.5C19.7,31.8 18.7,33 17.4,33zM37,36c0,0 -11.8,-7 -18,-7V15c5.8,0 18,-7 18,-7V36z"
+      android:fillColor="#90CAF9"/>
+  <path
+      android:pathData="M9,17A5,5 0,1 0,9 27,5 5,0 1,0 9,17zM40,19h-3v6h3c1.7,0 3,-1.3 3,-3S41.7,19 40,19z"
+      android:fillColor="#283593"/>
+  <path
+      android:pathData="M18.6,41.2c-0.9,0.6 -2.5,1.2 -4.6,1.4c-0.6,0.1 -1.2,-0.3 -1.4,-1L8.2,27.9c0,0 8.8,-6.2 8.8,1.1c0,5.5 1.5,8.4 2.2,9.5c0.5,0.7 0.5,1.6 0,2.3C19,41 18.8,41.1 18.6,41.2z"
+      android:fillColor="#283593"/>
+  <path
+      android:pathData="M9,29h10V15H9c-1.1,0 -2,0.9 -2,2v10C7,28.1 7.9,29 9,29z"
+      android:fillColor="#3F51B5"/>
+  <path
+      android:pathData="M38,38L38,38c-1.1,0 -2,-0.9 -2,-2V8c0,-1.1 0.9,-2 2,-2h0c1.1,0 2,0.9 2,2v28C40,37.1 39.1,38 38,38z"
+      android:fillColor="#42A5F5"/>
+</vector>

app/src/main/res/drawable/ic_attendance.xml

@@ -0,0 +1,33 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M40,45L8,45 8,3 30,3 40,13z"
+      android:fillColor="#90CAF9"/>
+  <path
+      android:pathData="M38.5,14L29,14 29,4.5z"
+      android:fillColor="#E1F5FE"/>
+  <path
+      android:pathData="M13,28H25V30H13zM13,20H25V22H13zM13,36H25V38H13z"
+      android:fillColor="#1976D2"/>
+  <path
+      android:pathData="M29,40h6v-6h-6V40z"
+      android:fillColor="#0D47A1"/>
+  <path
+      android:pathData="M31,36H33V38H31z"
+      android:fillColor="#BBDEFB"/>
+  <path
+      android:pathData="M32.91,30.59L31.5,32 28,28.5 29.41,27.09 31.5,29.18z"
+      android:fillColor="#0D47A1"/>
+  <path
+      android:pathData="M35.972,27.528L31.5,32 30.09,30.59 31.5,29.18 34.562,26.118z"
+      android:fillColor="#0D47A1"/>
+  <path
+      android:pathData="M28.9997,19.414L30.4139,17.9998L34.9996,22.5853L33.5854,23.9995z"
+      android:fillColor="#0D47A1"/>
+  <path
+      android:pathData="M28.9998,22.5861L33.5853,18.0004L34.9995,19.4146L30.414,24.0003z"
+      android:fillColor="#0D47A1"/>
+</vector>

app/src/main/res/drawable/ic_behavior.xml

@@ -0,0 +1,18 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M44,24c0,11 -9,20 -20,20S4,35 4,24S13,4 24,4S44,13 44,24z"
+      android:fillColor="#FFCA28"/>
+  <path
+      android:pathData="M33,27c0,0.86 -0.27,4.11 -1.69,7.01H16.65c-1.42,-2.9 -1.7,-6.15 -1.65,-7.01H33z"
+      android:fillColor="#5D4037"/>
+  <path
+      android:pathData="M13.8,21.6l-1.6,-1.2C12.3,20.3 14,18 17,18s4.7,2.3 4.8,2.4l-1.6,1.2c0,0 -1.3,-1.6 -3.2,-1.6S13.8,21.6 13.8,21.6zM27.8,21.6l-1.6,-1.2C26.3,20.3 28,18 31,18s4.7,2.3 4.8,2.4l-1.6,1.2c0,0 -1.3,-1.6 -3.2,-1.6S27.8,21.6 27.8,21.6z"
+      android:fillColor="#B76C09"/>
+  <path
+      android:pathData="M31.31,34.01C30.04,36.65 27.81,39 24,39s-6.05,-2.35 -7.35,-4.99c0,0 1.975,-2.01 7.35,-2.01S31.31,34.01 31.31,34.01z"
+      android:fillColor="#C62828"/>
+</vector>

app/src/main/res/drawable/ic_calendar_day.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M43,38c0,2.209 -1.791,4 -4,4H9c-2.209,0 -4,-1.791 -4,-4V10c0,-2.209 1.791,-4 4,-4h30c2.209,0 4,1.791 4,4V38z"
+      android:fillColor="#CFD8DC"/>
+  <path
+      android:pathData="M10,10H38V14H10z"
+      android:fillColor="#F44336"/>
+  <path
+      android:pathData="M16,22H38V26H16zM16,28H38V32H16zM16,34H38V38H16zM10,22H14V26H10zM10,28H14V32H10zM10,34H14V38H10zM16,16H38V20H16zM10,16H14V20H10z"
+      android:fillColor="#90A4AE"/>
+</vector>

app/src/main/res/drawable/ic_calendar_event.xml

@@ -0,0 +1,27 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M5,39V15h38v24c0,2.2 -1.8,4 -4,4H9C6.8,43 5,41.2 5,39"
+      android:fillColor="#CFD8DC"/>
+  <path
+      android:pathData="M5,25h38v8H5V25z"
+      android:fillColor="#ECEFF1"/>
+  <path
+      android:pathData="M13,27h4v4h-4V27zM19,27h4v4h-4V27zM31,27h4v4h-4V27z"
+      android:fillColor="#B0BEC5"/>
+  <path
+      android:pathData="M13,21h4v4h-4V21zM19,21h4v4h-4V21zM25,21h4v4h-4V21zM31,21h4v4h-4V21zM13,33h4v4h-4V33zM19,33h4v4h-4V33zM25,33h4v4h-4V33zM31,33h4v4h-4V33z"
+      android:fillColor="#90A4AE"/>
+  <path
+      android:pathData="M25,27h4v4h-4V27zM43,11v6H5v-6c0,-2.2 1.8,-4 4,-4h30C41.2,7 43,8.8 43,11"
+      android:fillColor="#F44336"/>
+  <path
+      android:pathData="M36,11c0,1.7 -1.3,3 -3,3s-3,-1.3 -3,-3s1.3,-3 3,-3C34.7,8 36,9.3 36,11M18,11c0,1.7 -1.3,3 -3,3s-3,-1.3 -3,-3s1.3,-3 3,-3S18,9.3 18,11"
+      android:fillColor="#B71C1C"/>
+  <path
+      android:pathData="M33,4c-1.1,0 -2,0.9 -2,2v5c0,1.1 0.9,2 2,2s2,-0.9 2,-2V6C35,4.9 34.1,4 33,4M15,4c-1.1,0 -2,0.9 -2,2v5c0,1.1 0.9,2 2,2s2,-0.9 2,-2V6C17,4.9 16.1,4 15,4"
+      android:fillColor="#B0BEC5"/>
+</vector>

app/src/main/res/drawable/ic_grade.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M44,24c0,11.045 -8.955,20 -20,20S4,35.045 4,24S12.955,4 24,4S44,12.955 44,24z"
+      android:fillColor="#F44336"/>
+  <path
+      android:pathData="M24,11l3.898,7.898l8.703,1.301l-6.301,6.102l1.5,8.699L24,30.898L16.199,35l1.5,-8.699l-6.301,-6.102l8.703,-1.301L24,11z"
+      android:fillColor="#FFCA28"/>
+</vector>

app/src/main/res/drawable/ic_message.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M40,10H8c-2.209,0 -4,1.791 -4,4v20c0,2.209 1.791,4 4,4h32c2.209,0 4,-1.791 4,-4V14C44,11.791 42.209,10 40,10z"
+      android:fillColor="#2196F3"/>
+  <path
+      android:pathData="M44,14.025c0,-0.465 -0.095,-0.904 -0.24,-1.32L24,27.025L4.241,12.705C4.095,13.121 4,13.561 4,14.025V15l20,14.495L44,15V14.025z"
+      android:fillColor="#0D47A1"/>
+</vector>

app/src/main/res/drawable/ic_note.xml

@@ -0,0 +1,18 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="64dp"
+    android:height="64dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M8,39.001v-30c0,-2.2 1.8,-4 4,-4h24c2.2,0 4,1.8 4,4v30c0,2.2 -1.8,4 -4,4H12C9.8,43.001 8,41.201 8,39.001z"
+      android:fillColor="#42a5f5"/>
+  <path
+      android:pathData="M14,8.001c0,-1.105 -0.895,-2 -2,-2s-2,0.895 -2,2s0.895,2 2,2S14,9.105 14,8.001zM22,8.001c0,-1.105 -0.895,-2 -2,-2s-2,0.895 -2,2s0.895,2 2,2S22,9.105 22,8.001zM30,8.001c0,-1.105 -0.895,-2 -2,-2s-2,0.895 -2,2s0.895,2 2,2S30,9.105 30,8.001zM38,8.001c0,-1.105 -0.895,-2 -2,-2s-2,0.895 -2,2s0.895,2 2,2S38,9.105 38,8.001z"
+      android:fillColor="#1e88e5"/>
+  <path
+      android:pathData="M11,8.001v-4c0,-0.6 0.4,-1 1,-1l0,0c0.6,0 1,0.4 1,1v4c0,0.6 -0.4,1 -1,1l0,0C11.4,9.001 11,8.601 11,8.001zM19,8.001v-4c0,-0.6 0.4,-1 1,-1l0,0c0.6,0 1,0.4 1,1v4c0,0.6 -0.4,1 -1,1l0,0C19.4,9.001 19,8.601 19,8.001zM27,8.001v-4c0,-0.6 0.4,-1 1,-1l0,0c0.6,0 1,0.4 1,1v4c0,0.6 -0.4,1 -1,1l0,0C27.4,9.001 27,8.601 27,8.001zM35,8.001v-4c0,-0.6 0.4,-1 1,-1l0,0c0.6,0 1,0.4 1,1v4c0,0.6 -0.4,1 -1,1l0,0C35.4,9.001 35,8.601 35,8.001z"
+      android:fillColor="#cfd8dc"/>
+  <path
+      android:pathData="M14,19.001h19.993v2H14V19.001zM14.007,15.001H34v2H14.007V15.001zM14,30.001h17v2H14V30.001zM27,34.001h6.993v2H27V34.001zM14,34.001h11v2H14V34.001zM21,23.001h-7v2h7V23.001z"
+      android:fillColor="#1565c0"/>
+</vector>

app/src/main/res/drawable/ic_timetable.xml

@@ -1,30 +1,30 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="128dp"
     android:height="128dp"
-    android:viewportWidth="128"
+    android:viewportWidth="48"
-    android:viewportHeight="128">
+    android:viewportHeight="48">
   <path
-      android:pathData="m18,100v-60h92v60c0,5.523 -4.477,10 -10,10h-72c-5.523,0 -10,-4.477 -10,-10z"
+      android:pathData="M42,38c0,2.209 -1.791,4 -4,4H10c-2.209,0 -4,-1.791 -4,-4V10c0,-2.209 1.791,-4 4,-4h28c2.209,0 4,1.791 4,4V38z"
-      android:fillColor="#ffc662"/>
+      android:fillColor="#CFD8DC"/>
   <path
-      android:pathData="m110,29.602v16.398h-92v-16.398c0,-5.309 4.332,-9.602 9.684,-9.602h72.633c5.352,0 9.684,4.293 9.684,9.602"
+      android:pathData="M11,18H16V23H11zM18,18H23V23H18zM25,18H30V23H25zM32,18H37V23H32zM32,25H37V30H32zM11,25H16V30H11zM11,32H16V37H11zM18,25H23V30H18zM25,25H30V30H25zM18,32H23V37H18zM25,32H30V37H25zM32,32H37V37H32z"
-      android:fillColor="#ff634f"/>
+      android:fillColor="#90A4AE"/>
   <path
-      android:pathData="m43,34c-2.75,0 -5,-2.25 -5,-5v-12c0,-2.75 2.25,-5 5,-5s5,2.25 5,5v12c0,2.75 -2.25,5 -5,5z"
+      android:pathData="M11,11H16V16H11zM18,11H23V16H18zM25,11H30V16H25zM32,11H37V16H32z"
-      android:fillColor="#888"/>
+      android:fillColor="#F44336"/>
   <path
-      android:pathData="m85,34c-2.75,0 -5,-2.25 -5,-5v-12c0,-2.75 2.25,-5 5,-5s5,2.25 5,5v12c0,2.75 -2.25,5 -5,5z"
+      android:pathData="M38,26c-0.338,0 -0.669,0.023 -1,0.05V30h-5v-2.382c-1.817,1.052 -3.329,2.565 -4.382,4.382H30v5h-3.95C26.023,37.331 26,37.662 26,38c0,1.405 0.254,2.747 0.697,4H38c2.209,0 4,-1.791 4,-4V26.697C40.747,26.254 39.405,26 38,26z"
-      android:fillColor="#888"/>
+      android:fillColor="#ECEFF1"/>
   <path
-      android:pathData="m48,74h-8c-2.211,0 -4,-1.789 -4,-4v-8c0,-2.211 1.789,-4 4,-4h8c2.211,0 4,1.789 4,4v8c0,2.211 -1.789,4 -4,4zM72,70v-8c0,-2.211 -1.789,-4 -4,-4h-8c-2.211,0 -4,1.789 -4,4v8c0,2.211 1.789,4 4,4h8c2.211,0 4,-1.789 4,-4zM92,70v-8c0,-2.211 -1.789,-4 -4,-4h-8c-2.211,0 -4,1.789 -4,4v8c0,2.211 1.789,4 4,4h8c2.211,0 4,-1.789 4,-4zM52,90v-8c0,-2.211 -1.789,-4 -4,-4h-8c-2.211,0 -4,1.789 -4,4v8c0,2.211 1.789,4 4,4h8c2.211,0 4,-1.789 4,-4zM72,90v-8c0,-2.211 -1.789,-4 -4,-4h-8c-2.211,0 -4,1.789 -4,4v8c0,2.211 1.789,4 4,4h8c2.211,0 4,-1.789 4,-4zM92,90v-8c0,-2.211 -1.789,-4 -4,-4h-8c-2.211,0 -4,1.789 -4,4v8c0,2.211 1.789,4 4,4h8c2.211,0 4,-1.789 4,-4z"
+      android:pathData="M37,30v-3.95c-1.812,0.15 -3.506,0.703 -5,1.568V30H37zM30,32h-2.382c-0.865,1.494 -1.418,3.188 -1.568,5H30V32z"
-      android:fillColor="#ffe79f"/>
+      android:fillColor="#CFD8DC"/>
   <path
-      android:pathData="m124,104c0,11.047 -8.953,20 -20,20 -11.047,0 -20,-8.953 -20,-20 0,-11.047 8.953,-20 20,-20 11.047,0 20,8.953 20,20z"
+      android:pathData="M48,38c0,5.5 -4.5,10 -10,10s-10,-4.5 -10,-10s4.5,-10 10,-10S48,32.5 48,38"
-      android:fillColor="#fff"/>
+      android:fillColor="#F44336"/>
   <path
-      android:pathData="m104,80c-13.254,0 -24,10.746 -24,24 0,13.254 10.746,24 24,24 13.254,0 24,-10.746 24,-24 0,-13.254 -10.746,-24 -24,-24zM104,120c-8.836,0 -16,-7.164 -16,-16 0,-8.836 7.164,-16 16,-16 8.836,0 16,7.164 16,16 0,8.836 -7.164,16 -16,16z"
+      android:pathData="M45,38c0,3.9 -3.1,7 -7,7s-7,-3.1 -7,-7s3.1,-7 7,-7S45,34.1 45,38"
-      android:fillColor="#1f80e5"/>
+      android:fillColor="#EEEEEE"/>
   <path
-      android:pathData="m113.41,110.59 l-5.563,-5.563c0.086,-0.328 0.148,-0.668 0.148,-1.023 0,-1.477 -0.809,-2.754 -2,-3.445v-6.555c0,-1.105 -0.895,-2 -2,-2s-2,0.895 -2,2v6.555c-1.191,0.691 -2,1.969 -2,3.445 0,2.211 1.789,4 4,4 0.355,0 0.695,-0.063 1.023,-0.148l5.563,5.563c0.391,0.391 0.902,0.586 1.414,0.586s1.023,-0.195 1.414,-0.586c0.781,-0.781 0.781,-2.047 0,-2.828z"
+      android:fillColor="#FF000000"
-      android:fillColor="#919191"/>
+      android:pathData="M42.4,41.1l-2.9,-2.9c0,-0.1 0,-0.1 0,-0.2c0,-0.4 -0.2,-0.8 -0.5,-1.1V33h-2v3.9c-0.3,0.3 -0.5,0.7 -0.5,1.1c0,0.8 0.7,1.5 1.5,1.5h0.1l2.9,2.9L42.4,41.1z"/>
 </vector>

app/src/main/res/layout/attendance_details_dialog.xml

@@ -86,6 +86,14 @@
                 </LinearLayout>
             </LinearLayout>
 
+            <com.mikepenz.iconics.view.IconicsTextView
+                android:id="@+id/legend"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:textAppearance="@style/NavView.TextView.Helper"
+                tools:text="[ - ] dodano notatki" />
+
             <TextView
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -230,6 +238,15 @@
                         tools:text="12345" />
                 </LinearLayout>
             </LinearLayout>
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/notesButton"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_horizontal"
+                android:layout_marginTop="8dp"
+                android:text="@string/notes_button" />
         </LinearLayout>
     </ScrollView>
 </layout>

app/src/main/res/layout/attendance_item_attendance.xml

@@ -52,7 +52,7 @@
             tools:text="Nieobecność nieusprawiedliwiona" />
 
 
-        <TextView
+        <com.mikepenz.iconics.view.IconicsTextView
             android:id="@+id/subjectName"
             android:layout_width="0dp"
             android:layout_height="wrap_content"

app/src/main/res/layout/card_home_notes.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2021-10-28.
+  -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    tools:layout_margin="8dp">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/card_notes_header_title"
+        android:textAppearance="@style/NavView.TextView.Title" />
+
+    <androidx.appcompat.widget.AppCompatTextView
+        android:id="@+id/noData"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:layout_margin="16dp"
+        android:fontFamily="sans-serif-light"
+        android:text="@string/notes_no_data"
+        android:textSize="16sp" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/list"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:clipToPadding="false"
+        tools:itemCount="3"
+        tools:listitem="@layout/note_list_item"
+        tools:visibility="visible" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/addNote"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/notes_action_add" />
+</LinearLayout>

app/src/main/res/layout/dialog_day.xml

@@ -31,13 +31,24 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginHorizontal="8dp"
-            android:layout_marginBottom="8dp"
             android:textAppearance="@style/NavView.TextView.Helper"
             android:textIsSelectable="true"
             android:visibility="gone"
             tools:text="8:00 - 14:20 (7 lekcji, 6 godzin, 20 minut)"
             tools:visibility="visible" />
 
+        <com.mikepenz.iconics.view.IconicsTextView
+            android:id="@+id/legend"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="8dp"
+            android:textAppearance="@style/NavView.TextView.Helper"
+            tools:text="[ - ] dodano notatki" />
+
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="8dp" />
+
         <FrameLayout
             android:id="@+id/lessonChangesFrame"
             android:layout_width="match_parent"
@@ -74,7 +85,8 @@
             android:layout_height="wrap_content"
             android:layout_marginHorizontal="8dp"
             android:orientation="vertical"
-            android:paddingVertical="16dp"
+            android:paddingTop="16dp"
+            android:paddingBottom="8dp"
             android:visibility="gone"
             tools:visibility="visible">
 
@@ -106,5 +118,13 @@
             android:clipToPadding="false"
             tools:listitem="@layout/event_list_item"
             tools:visibility="visible" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/notesButton"
+            style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:text="@string/notes_button" />
     </LinearLayout>
 </androidx.core.widget.NestedScrollView>

app/src/main/res/layout/dialog_event_details.xml

@@ -156,7 +156,7 @@
             <TextView
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="4dp"
+                android:layout_marginTop="8dp"
                 android:textAppearance="@style/NavView.TextView.Helper"
                 android:text="@string/dialog_event_details_topic"/>
 
@@ -172,7 +172,7 @@
                 android:id="@+id/bodyTitle"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="4dp"
+                android:layout_marginTop="8dp"
                 android:text="@string/dialog_event_details_body"
                 android:textAppearance="@style/NavView.TextView.Helper" />
 
@@ -197,7 +197,7 @@
                 android:id="@+id/attachmentsTitle"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="4dp"
+                android:layout_marginTop="8dp"
                 android:text="@string/dialog_event_details_attachments"
                 android:textAppearance="@style/NavView.TextView.Helper" />
 
@@ -279,6 +279,14 @@
                     android:text="\uf436"
                     android:textSize="20sp" />
             </com.google.android.flexbox.FlexboxLayout>
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/notesButton"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_horizontal"
+                android:text="@string/notes_button" />
         </LinearLayout>
     </androidx.core.widget.NestedScrollView>
 </layout>

app/src/main/res/layout/dialog_grade_details.xml

@@ -113,6 +113,14 @@
                 </LinearLayout>
             </LinearLayout>
 
+            <com.mikepenz.iconics.view.IconicsTextView
+                android:id="@+id/legend"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:textAppearance="@style/NavView.TextView.Helper"
+                tools:text="[ - ] dodano notatki" />
+
             <TextView
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -307,6 +315,15 @@
                     android:minHeight="0dp"
                     android:text="@string/configure" />
             </LinearLayout>
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/notesButton"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_horizontal"
+                android:layout_marginTop="8dp"
+                android:text="@string/notes_button" />
         </LinearLayout>
     </ScrollView>
 </layout>

app/src/main/res/layout/dialog_lesson_details.xml

@@ -155,6 +155,14 @@
 
             </LinearLayout>
 
+            <com.mikepenz.iconics.view.IconicsTextView
+                android:id="@+id/legend"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginHorizontal="8dp"
+                android:textAppearance="@style/NavView.TextView.Helper"
+                tools:text="[ - ] dodano notatki" />
+
             <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -356,8 +364,9 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginHorizontal="8dp"
-                android:paddingVertical="16dp"
                 android:orientation="vertical"
+                android:paddingTop="16dp"
+                android:paddingBottom="8dp"
                 android:visibility="gone"
                 tools:visibility="visible">
 
@@ -390,6 +399,13 @@
                 tools:visibility="visible"
                 tools:listitem="@layout/event_list_item" />
 
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/notesButton"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_horizontal"
+                android:text="@string/notes_button" />
         </LinearLayout>
     </androidx.core.widget.NestedScrollView>
 </layout>

app/src/main/res/layout/grades_item_grade.xml

@@ -36,7 +36,7 @@
                 android:gravity="center_vertical"
                 android:orientation="horizontal">
 
-                <TextView
+                <com.mikepenz.iconics.view.IconicsTextView
                     android:id="@+id/gradeDescription"
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"

app/src/main/res/layout/message_fragment.xml

@@ -198,7 +198,7 @@
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"
                     android:layout_marginHorizontal="8dp"
-                    android:layout_marginVertical="8dp"
+                    android:layout_marginTop="8dp"
                     android:orientation="horizontal"
                     android:visibility="visible"
                     tools:visibility="visible">
@@ -260,6 +260,14 @@
                         android:visibility="gone"
                         tools:drawableTop="@android:drawable/stat_sys_download" />
                 </LinearLayout>
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/notesButton"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center_horizontal"
+                    android:text="@string/notes_button" />
             </LinearLayout>
         </androidx.core.widget.NestedScrollView>
     </LinearLayout>

app/src/main/res/layout/messages_list_item.xml

@@ -34,7 +34,7 @@
             tools:text="JP"
             tools:visibility="visible" />
 
-        <TextView
+        <com.mikepenz.iconics.view.IconicsTextView
             android:id="@+id/messageSubject"
             android:layout_width="0dp"
             android:layout_height="wrap_content"

app/src/main/res/layout/note_details_dialog.xml

@@ -0,0 +1,143 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2021-10-23.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <data>
+
+        <import type="pl.szczodrzynski.edziennik.data.db.entity.Note" />
+
+        <variable
+            name="note"
+            type="Note" />
+    </data>
+
+    <androidx.core.widget.NestedScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:paddingHorizontal="16dp"
+            android:paddingVertical="8dp">
+
+            <include
+                android:id="@+id/header"
+                layout="@layout/note_dialog_header" />
+
+            <include
+                layout="@layout/note_dialog_subtitle"
+                app:text="@{@string/notes_details_dialog_title}" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginHorizontal="8dp"
+                android:orientation="vertical">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:text="@string/dialog_event_details_added_by"
+                    android:textAppearance="@style/NavView.TextView.Helper" />
+
+                <com.mikepenz.iconics.view.IconicsTextView
+                    android:id="@+id/addedBy"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:textIsSelectable="true"
+                    tools:text="18 grudnia, 23:17 przez Janósz Kowalski" />
+
+                <LinearLayout
+                    android:id="@+id/idsLayout"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:baselineAligned="false"
+                    android:orientation="horizontal"
+                    android:visibility="gone">
+
+                    <LinearLayout
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:orientation="vertical">
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginTop="8dp"
+                            android:text="@string/notes_details_id"
+                            android:textAppearance="@style/NavView.TextView.Helper" />
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:text="@{String.valueOf(note.id)}"
+                            android:textIsSelectable="true"
+                            tools:text="1635073956543" />
+                    </LinearLayout>
+
+                    <LinearLayout
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:orientation="vertical">
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginTop="8dp"
+                            android:text="@string/notes_details_owner_id"
+                            android:textAppearance="@style/NavView.TextView.Helper" />
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:text="@{String.valueOf(note.ownerId)}"
+                            android:textIsSelectable="true"
+                            tools:text="3875623" />
+                    </LinearLayout>
+                </LinearLayout>
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:isVisible="@{note.topic != null}"
+                    android:text="@string/dialog_event_details_topic"
+                    android:textAppearance="@style/NavView.TextView.Helper" />
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:isVisible="@{note.topic != null}"
+                    android:text="@{note.topicHtml}"
+                    android:textAppearance="@style/NavView.TextView.Medium"
+                    android:textIsSelectable="true"
+                    tools:text="Rozdział II: Panowanie Piastów i Jagiellonów.Przeniesiony z 11 grudnia." />
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:text="@string/dialog_event_details_body"
+                    android:textAppearance="@style/NavView.TextView.Helper" />
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="@{note.bodyHtml}"
+                    android:textAppearance="@style/NavView.TextView.Medium"
+                    android:textIsSelectable="true"
+                    tools:text="Rozdział II: Panowanie Piastów i Jagiellonów.Przeniesiony z 11 grudnia." />
+            </LinearLayout>
+        </LinearLayout>
+    </androidx.core.widget.NestedScrollView>
+</layout>