[UI] Add teachers list feature. (#94)

* Add teachers list feature

* Fix

* some fixes

* Auto stash before merge of "develop" and "origin/develop"

* Add teachers list feature

* Fix

* some fixes

* [UI] Fix updating badges crashing with expanded items.

* Add support for fetching teachers from vulcan, fix some code

* Update app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Teacher.kt

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

* Update some code

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

* Update app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Teacher.kt

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

* Update app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/hebe/VulcanHebeTeachers.kt

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

* Update app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Teacher.kt

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

* Update app/src/main/java/pl/szczodrzynski/edziennik/data/db/migration/Migration96.kt

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

* Update app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/hebe/VulcanHebeTeachers.kt

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

* Optimize code

* Fix loadTarget algorithm

* Apply suggestions from code review

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

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

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

.idea/copyright/Antoni.xml

@@ -0,0 +1,6 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="notice" value="Copyright (c) Antoni Czaplicki &amp;#36;{today.year}-&amp;#36;{today.month}-&amp;#36;{today.day}. " />
+    <option name="myName" value="Antoni" />
+  </copyright>
+</component>

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

@@ -44,6 +44,8 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.gson.*
 import com.google.gson.JsonArray
 import com.google.gson.JsonObject
+import com.mikepenz.iconics.typeface.IIcon
+import com.mikepenz.materialdrawer.holder.StringHolder
 import im.wangchao.mhttp.Response
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.delay
@@ -59,6 +61,7 @@ import pl.szczodrzynski.edziennik.data.db.entity.Profile
 import pl.szczodrzynski.edziennik.data.db.entity.Teacher
 import pl.szczodrzynski.edziennik.data.db.entity.Team
 import pl.szczodrzynski.edziennik.utils.models.Time
+import pl.szczodrzynski.navlib.ImageHolder
 import java.io.InterruptedIOException
 import java.io.PrintWriter
 import java.io.StringWriter
@@ -862,6 +865,8 @@ fun @receiver:DrawableRes Int.resolveDrawable(context: Context): Drawable {
     }
 }
 
+fun @receiver:StringRes Int.resolveString(context: Context) = context.getString(this)
+
 fun View.findParentById(targetId: Int): View? {
     if (id == targetId) {
         return this
@@ -1371,3 +1376,7 @@ fun CharSequence.getWordBounds(position: Int, onlyInWord: Boolean = false): Pair
 }
 
 infix fun Int.hasSet(what: Int) = this and what == what
+
+fun Int.toStringHolder() = StringHolder(this)
+fun CharSequence.toStringHolder() = StringHolder(this)
+fun IIcon.toImageHolder() = ImageHolder(this)

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

@@ -25,9 +25,7 @@ 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 com.mikepenz.materialdrawer.model.DividerDrawerItem
+import com.mikepenz.materialdrawer.model.*
-import com.mikepenz.materialdrawer.model.ProfileDrawerItem
-import com.mikepenz.materialdrawer.model.ProfileSettingDrawerItem
 import com.mikepenz.materialdrawer.model.interfaces.*
 import com.mikepenz.materialdrawer.model.utils.hiddenInMiniDrawer
 import eu.szkolny.font.SzkolnyFont
@@ -76,6 +74,7 @@ import pl.szczodrzynski.edziennik.ui.modules.messages.single.MessageFragment
 import pl.szczodrzynski.edziennik.ui.modules.notifications.NotificationsListFragment
 import pl.szczodrzynski.edziennik.ui.modules.settings.ProfileManagerFragment
 import pl.szczodrzynski.edziennik.ui.modules.settings.SettingsFragment
+import pl.szczodrzynski.edziennik.ui.modules.teachers.TeachersListFragment
 import pl.szczodrzynski.edziennik.ui.modules.timetable.TimetableFragment
 import pl.szczodrzynski.edziennik.ui.modules.webpush.WebPushFragment
 import pl.szczodrzynski.edziennik.utils.*
@@ -116,6 +115,8 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         const val DRAWER_ITEM_ATTENDANCE = 16
         const val DRAWER_ITEM_ANNOUNCEMENTS = 18
         const val DRAWER_ITEM_NOTIFICATIONS = 20
+        const val DRAWER_ITEM_MORE = 21
+        const val DRAWER_ITEM_TEACHERS = 22
         const val DRAWER_ITEM_SETTINGS = 101
         const val DRAWER_ITEM_DEBUG = 102
 
@@ -130,6 +131,13 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
 
         val navTargetList: List<NavTarget> by lazy {
             val list: MutableList<NavTarget> = mutableListOf()
+            val moreList: MutableList<NavTarget> = mutableListOf()
+
+            moreList += NavTarget(DRAWER_ITEM_TEACHERS,
+                R.string.menu_teachers,
+                TeachersListFragment::class)
+                .withIcon(CommunityMaterial.Icon3.cmd_shield_account_outline)
+                .isStatic(true)
 
             // home item
             list += NavTarget(DRAWER_ITEM_HOME, R.string.menu_home_page, HomeFragment::class)
@@ -139,7 +147,9 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                 .isStatic(true)
                 .withPopToHome(false)
 
-            list += NavTarget(DRAWER_ITEM_TIMETABLE, R.string.menu_timetable, TimetableFragment::class)
+            list += NavTarget(DRAWER_ITEM_TIMETABLE,
+                R.string.menu_timetable,
+                TimetableFragment::class)
                 .withIcon(CommunityMaterial.Icon3.cmd_timetable)
                 .withBadgeTypeId(TYPE_LESSON_CHANGE)
                 .isInDrawer(true)
@@ -164,24 +174,38 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                 .withBadgeTypeId(TYPE_HOMEWORK)
                 .isInDrawer(true)
 
-            list += NavTarget(DRAWER_ITEM_BEHAVIOUR, R.string.menu_notices, BehaviourFragment::class)
+            list += NavTarget(DRAWER_ITEM_BEHAVIOUR,
+                R.string.menu_notices,
+                BehaviourFragment::class)
                 .withIcon(CommunityMaterial.Icon.cmd_emoticon_outline)
                 .withBadgeTypeId(TYPE_NOTICE)
                 .isInDrawer(true)
 
-            list += NavTarget(DRAWER_ITEM_ATTENDANCE, R.string.menu_attendance, AttendanceFragment::class)
+            list += NavTarget(DRAWER_ITEM_ATTENDANCE,
+                R.string.menu_attendance,
+                AttendanceFragment::class)
                 .withIcon(CommunityMaterial.Icon.cmd_calendar_remove_outline)
                 .withBadgeTypeId(TYPE_ATTENDANCE)
                 .isInDrawer(true)
 
-            list += NavTarget(DRAWER_ITEM_ANNOUNCEMENTS, R.string.menu_announcements, AnnouncementsFragment::class)
+            list += NavTarget(DRAWER_ITEM_ANNOUNCEMENTS,
+                R.string.menu_announcements,
+                AnnouncementsFragment::class)
                 .withIcon(CommunityMaterial.Icon.cmd_bullhorn_outline)
                 .withBadgeTypeId(TYPE_ANNOUNCEMENT)
                 .isInDrawer(true)
 
+            list += NavTarget(DRAWER_ITEM_MORE, R.string.menu_more, null)
+                .withIcon(CommunityMaterial.Icon.cmd_dots_horizontal_circle_outline)
+                .isInDrawer(true)
+                .isStatic(true)
+                .withSubItems(*moreList.toTypedArray())
+
 
             // static drawer items
-            list += NavTarget(DRAWER_ITEM_NOTIFICATIONS, R.string.menu_notifications, NotificationsListFragment::class)
+            list += NavTarget(DRAWER_ITEM_NOTIFICATIONS,
+                R.string.menu_notifications,
+                NotificationsListFragment::class)
                 .withIcon(CommunityMaterial.Icon.cmd_bell_ring_outline)
                 .isInDrawer(true)
                 .isStatic(true)
@@ -200,13 +224,17 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                 .withDescription(R.string.drawer_add_new_profile_desc)
                 .isInProfileList(true)
 
-            list += NavTarget(DRAWER_PROFILE_MANAGE, R.string.menu_manage_profiles, ProfileManagerFragment::class)
+            list += NavTarget(DRAWER_PROFILE_MANAGE,
+                R.string.menu_manage_profiles,
+                ProfileManagerFragment::class)
                 .withTitle(R.string.title_profile_manager)
                 .withIcon(CommunityMaterial.Icon.cmd_account_group)
                 .withDescription(R.string.drawer_manage_profiles_desc)
                 .isInProfileList(false)
 
-            list += NavTarget(DRAWER_PROFILE_MARK_ALL_AS_READ, R.string.menu_mark_everything_as_read, null)
+            list += NavTarget(DRAWER_PROFILE_MARK_ALL_AS_READ,
+                R.string.menu_mark_everything_as_read,
+                null)
                 .withIcon(CommunityMaterial.Icon.cmd_eye_check_outline)
                 .isInProfileList(true)
 
@@ -216,10 +244,16 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
 
 
             // other target items, not directly navigated
-            list += NavTarget(TARGET_GRADES_EDITOR, R.string.menu_grades_editor, GradesEditorFragment::class)
+            list += NavTarget(TARGET_GRADES_EDITOR,
+                R.string.menu_grades_editor,
+                GradesEditorFragment::class)
             list += NavTarget(TARGET_FEEDBACK, R.string.menu_feedback, FeedbackFragment::class)
-            list += NavTarget(TARGET_MESSAGES_DETAILS, R.string.menu_message, MessageFragment::class).withPopTo(DRAWER_ITEM_MESSAGES)
+            list += NavTarget(TARGET_MESSAGES_DETAILS,
-            list += NavTarget(TARGET_MESSAGES_COMPOSE, R.string.menu_message_compose, MessagesComposeFragment::class)
+                R.string.menu_message,
+                MessageFragment::class).withPopTo(DRAWER_ITEM_MESSAGES)
+            list += NavTarget(TARGET_MESSAGES_COMPOSE,
+                R.string.menu_message_compose,
+                MessagesComposeFragment::class)
             list += NavTarget(TARGET_WEB_PUSH, R.string.menu_web_push, WebPushFragment::class)
             if (App.devMode) {
                 list += NavTarget(DRAWER_ITEM_DEBUG, R.string.menu_debug, DebugFragment::class)
@@ -323,9 +357,12 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                     window.statusBarColor = statusBarColor
                 }
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && ColorUtils.calculateLuminance(statusBarColor) > 0.6) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
+                        && ColorUtils.calculateLuminance(statusBarColor) > 0.6
+                ) {
                     @Suppress("deprecation")
-                    window.decorView.systemUiVisibility = window.decorView.systemUiVisibility or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
+                    window.decorView.systemUiVisibility =
+                        window.decorView.systemUiVisibility or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
                 }
 
                 // TODO fix navlib navbar detection, orientation change issues, status bar color setting if not fullscreen
@@ -385,8 +422,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                             ProfileConfigDialog(this@MainActivity, appProfile)
                         }
                         true
-                    }
+                    } else {
-                    else {
                         false
                     }
                 }
@@ -407,7 +443,9 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
 
         app.db.profileDao().all.observe(this) { profiles ->
             val allArchived = profiles.all { it.archived }
-            drawer.setProfileList(profiles.filter { it.id >= 0 && (!it.archived || allArchived) }.toMutableList())
+            drawer.setProfileList(profiles.filter {
+                it.id >= 0 && (!it.archived || allArchived)
+            }.toMutableList())
             //prepend the archived profile if loaded
             if (app.profile.archived && !allArchived) {
                 drawer.prependProfile(Profile(
@@ -469,9 +507,12 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         val today = Date.getToday()
         if ((today.month % 11 == 1) && app.config.ui.snowfall) {
             b.rootFrame.addView(layoutInflater.inflate(R.layout.snowfall, b.rootFrame, false))
-        }
+        } else if (app.config.ui.eggfall && BigNightUtil().isDataWielkanocyNearDzisiaj()) {
-        else if (app.config.ui.eggfall && BigNightUtil().isDataWielkanocyNearDzisiaj()) {
+            val eggfall = layoutInflater.inflate(
-            val eggfall = layoutInflater.inflate(R.layout.eggfall, b.rootFrame, false) as SnowfallView
+                R.layout.eggfall,
+                b.rootFrame,
+                false
+            ) as SnowfallView
             eggfall.setSnowflakeBitmaps(listOf(
                 BitmapFactory.decodeResource(resources, R.drawable.egg1),
                 BitmapFactory.decodeResource(resources, R.drawable.egg2),
@@ -518,14 +559,17 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                         app.config.appRateSnackbarTime = 0
                     }
                     .onNegative { cafeBar ->
-                            Toast.makeText(this, R.string.rate_snackbar_negative_message, Toast.LENGTH_LONG).show()
+                        Toast.makeText(this,
+                            R.string.rate_snackbar_negative_message,
+                            Toast.LENGTH_LONG).show()
                         cafeBar.dismiss()
                         app.config.appRateSnackbarTime = 0
                     }
                     .onNeutral { cafeBar ->
                         Toast.makeText(this, R.string.ok, Toast.LENGTH_LONG).show()
                         cafeBar.dismiss()
-                            app.config.appRateSnackbarTime = System.currentTimeMillis() + 7 * 24 * 60 * 60 * 1000
+                        app.config.appRateSnackbarTime =
+                            System.currentTimeMillis() + 7 * 24 * 60 * 60 * 1000
                     }
                     .autoDismiss(false)
                     .swipeToDismiss(true)
@@ -570,17 +614,22 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             DRAWER_PROFILE_SYNC_ALL -> {
                 EdziennikTask.sync().enqueue(this)
             }
-            DRAWER_PROFILE_MARK_ALL_AS_READ -> { launch {
+            DRAWER_PROFILE_MARK_ALL_AS_READ -> {
+                launch {
                     withContext(Dispatchers.Default) {
                         app.db.profileDao().allNow.forEach { profile ->
                             if (profile.loginStoreType != LoginStore.LOGIN_TYPE_LIBRUS)
-                            app.db.metadataDao().setAllSeenExceptMessagesAndAnnouncements(profile.id, true)
+                                app.db.metadataDao()
+                                    .setAllSeenExceptMessagesAndAnnouncements(profile.id, true)
                             else
                                 app.db.metadataDao().setAllSeenExceptMessages(profile.id, true)
                         }
                     }
-                Toast.makeText(this@MainActivity, R.string.main_menu_mark_as_read_success, Toast.LENGTH_SHORT).show()
+                    Toast.makeText(this@MainActivity,
-            }}
+                        R.string.main_menu_mark_as_read_success,
+                        Toast.LENGTH_SHORT).show()
+                }
+            }
             else -> {
                 loadTarget(id)
             }
@@ -668,11 +717,13 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             arguments = arguments
         ).enqueue(this)
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onUpdateEvent(event: Update) {
         EventBus.getDefault().removeStickyEvent(event)
         UpdateAvailableDialog(this, event)
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onRegisterAvailabilityEvent(event: RegisterAvailabilityEvent) {
         EventBus.getDefault().removeStickyEvent(event)
@@ -681,6 +732,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             RegisterUnavailableDialog(this, error.status!!)
         }
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN)
     fun onApiTaskStartedEvent(event: ApiTaskStartedEvent) {
         swipeRefreshLayout.isRefreshing = true
@@ -692,6 +744,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             }
         }
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN)
     fun onProfileListEmptyEvent(event: ProfileListEmptyEvent) {
         d(TAG, "Profile list is empty. Launch LoginActivity.")
@@ -699,6 +752,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         startActivity(Intent(this, LoginActivity::class.java))
         finish()
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN)
     fun onApiTaskProgressEvent(event: ApiTaskProgressEvent) {
         if (event.profileId == App.profileId) {
@@ -708,11 +762,16 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                 subtitle = if (event.progress < 0f)
                     event.progressText ?: ""
                 else
-                    getString(R.string.toolbar_subtitle_syncing_format, event.progress.roundToInt(), event.progressText ?: "")
+                    getString(
+                        R.string.toolbar_subtitle_syncing_format,
+                        event.progress.roundToInt(),
+                        event.progressText ?: "",
+                    )
 
             }
         }
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onApiTaskFinishedEvent(event: ApiTaskFinishedEvent) {
         EventBus.getDefault().removeStickyEvent(event)
@@ -724,11 +783,13 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             }
         }
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onApiTaskAllFinishedEvent(event: ApiTaskAllFinishedEvent) {
         EventBus.getDefault().removeStickyEvent(event)
         swipeRefreshLayout.isRefreshing = false
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onApiTaskErrorEvent(event: ApiTaskErrorEvent) {
         EventBus.getDefault().removeStickyEvent(event)
@@ -745,6 +806,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         mainSnackbar.dismiss()
         errorSnackbar.addError(event.error).show()
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onAppManagerDetectedEvent(event: AppManagerDetectedEvent) {
         EventBus.getDefault().removeStickyEvent(event)
@@ -756,7 +818,9 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             .setPositiveButton(R.string.ok) { _, _ ->
                 try {
                     for (intent in appManagerIntentList) {
-                            if (packageManager.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY) != null) {
+                        if (packageManager.resolveActivity(intent,
+                                PackageManager.MATCH_DEFAULT_ONLY) != null
+                        ) {
                             startActivity(intent)
                         }
                     }
@@ -765,7 +829,8 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                         startActivity(Intent(Settings.ACTION_SETTINGS))
                     } catch (e: Exception) {
                         e.printStackTrace()
-                            Toast.makeText(this, R.string.app_manager_open_failed, Toast.LENGTH_SHORT).show()
+                        Toast.makeText(this, R.string.app_manager_open_failed, Toast.LENGTH_SHORT)
+                            .show()
                     }
                 }
             }
@@ -775,6 +840,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             .setCancelable(false)
             .show()
     }
+
     @Subscribe(threadMode = ThreadMode.MAIN)
     fun onUserActionRequiredEvent(event: UserActionRequiredEvent) {
         app.userActionManager.execute(this, event.profileId, event.type)
@@ -808,11 +874,12 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             handleIntent(intent?.extras)
         }
     }
+
     fun handleIntent(extras: Bundle?) {
 
         d(TAG, "handleIntent() {")
         extras?.keySet()?.forEach { key ->
-            d(TAG, "    \"$key\": "+extras.get(key))
+            d(TAG, "    \"$key\": " + extras.get(key))
         }
         d(TAG, "}")
 
@@ -842,7 +909,9 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                     true
                 }
                 "createManualEvent" -> {
-                    val date = extras.getString("eventDate")?.let { Date.fromY_m_d(it) } ?: Date.getToday()
+                    val date = extras.getString("eventDate")
+                        ?.let { Date.fromY_m_d(it) }
+                        ?: Date.getToday()
                     EventManualDialog(
                         this,
                         App.profileId,
@@ -913,9 +982,11 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
     override fun recreate() {
         recreate(navTargetId)
     }
+
     fun recreate(targetId: Int) {
         recreate(targetId, null)
     }
+
     fun recreate(targetId: Int? = null, arguments: Bundle? = null) {
         val intent = Intent(this, MainActivity::class.java)
         if (arguments != null)
@@ -932,10 +1003,12 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         d(TAG, "Activity started")
         super.onStart()
     }
+
     override fun onStop() {
         d(TAG, "Activity stopped")
         super.onStop()
     }
+
     override fun onResume() {
         d(TAG, "Activity resumed")
         val filter = IntentFilter()
@@ -944,12 +1017,14 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         EventBus.getDefault().register(this)
         super.onResume()
     }
+
     override fun onPause() {
         d(TAG, "Activity paused")
         unregisterReceiver(intentReceiver)
         EventBus.getDefault().unregister(this)
         super.onPause()
     }
+
     override fun onDestroy() {
         d(TAG, "Activity destroyed")
         super.onDestroy()
@@ -1010,6 +1085,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
     }
 
     fun loadProfile(id: Int) = loadProfile(id, navTargetId)
+
     // fun loadProfile(id: Int, arguments: Bundle?) = loadProfile(id, navTargetId, arguments)
     fun loadProfile(profile: Profile): Boolean {
         if (!canNavigate()) {
@@ -1024,6 +1100,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         loadProfile(profile, navTargetId, null)
         return true
     }
+
     private fun loadProfile(
         id: Int,
         drawerSelection: Int,
@@ -1055,6 +1132,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         }
         return true
     }
+
     private fun loadProfile(profile: Profile, drawerSelection: Int, arguments: Bundle?) {
         App.profile = profile
         MessagesFragment.pageSelection = -1
@@ -1084,6 +1162,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         drawer.currentProfile = app.profileId
         loadTarget(drawerSelection, arguments, skipBeforeNavigate = true)
     }
+
     fun loadTarget(
         id: Int,
         arguments: Bundle? = null,
@@ -1093,15 +1172,28 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         if (loadId == -1) {
             loadId = DRAWER_ITEM_HOME
         }
-        val target = navTargetList
+        val targets = navTargetList
-                .firstOrNull { it.id == loadId }
+            .flatMap { it.subItems?.toList() ?: emptyList() }
-        return if (target == null) {
+            .plus(navTargetList)
-            Toast.makeText(this, getString(R.string.error_invalid_fragment, id), Toast.LENGTH_LONG).show()
+        val target = targets.firstOrNull { it.id == loadId }
+        return when {
+            target == null -> {
+                Toast.makeText(
+                    this,
+                    getString(R.string.error_invalid_fragment, id),
+                    Toast.LENGTH_LONG,
+                ).show()
                 loadTarget(navTargetList.first(), arguments, skipBeforeNavigate)
-        } else {
+            }
+            target.fragmentClass != null -> {
                 loadTarget(target, arguments, skipBeforeNavigate)
             }
+            else -> {
+                false
             }
+        }
+    }
+
     private fun loadTarget(
         target: NavTarget,
         args: Bundle? = null,
@@ -1120,7 +1212,9 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         }
         pausedNavigationData = null
 
-        val arguments = args ?: navBackStack.firstOrNull { it.first.id == target.id }?.second ?: Bundle()
+        val arguments = args 
+            ?: navBackStack.firstOrNull { it.first.id == target.id }?.second
+            ?: Bundle()
         bottomSheet.close()
         bottomSheet.removeAllContextual()
         bottomSheet.toggleGroupEnabled = false
@@ -1132,7 +1226,8 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         navView.bottomBar.fabExtended = false
         navView.bottomBar.setFabOnClickListener(null)
 
-        d("NavDebug", "Navigating from ${navTarget.fragmentClass?.java?.simpleName} to ${target.fragmentClass?.java?.simpleName}")
+        d("NavDebug",
+            "Navigating from ${navTarget.fragmentClass?.java?.simpleName} to ${target.fragmentClass?.java?.simpleName}")
 
         val fragment = target.fragmentClass?.java?.newInstance() ?: return false
         fragment.arguments = arguments
@@ -1144,8 +1239,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
                 R.anim.fade_in,
                 R.anim.fade_out
             )
-        }
+        } else {
-        else {
             navBackStack.keys().lastIndexOf(target).let {
                 if (it == -1)
                     return@let target
@@ -1193,7 +1287,8 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             }
         }
 
-        d("NavDebug", "Current fragment ${navTarget.fragmentClass?.java?.simpleName}, pop to home ${navTarget.popToHome}, back stack:")
+        d("NavDebug",
+            "Current fragment ${navTarget.fragmentClass?.java?.simpleName}, pop to home ${navTarget.popToHome}, back stack:")
         navBackStack.forEachIndexed { index, target2 ->
             d("NavDebug", " - $index: ${target2.first.fragmentClass?.java?.simpleName}")
         }
@@ -1204,9 +1299,13 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         // TASK DESCRIPTION
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             val bm = BitmapFactory.decodeResource(resources, R.mipmap.ic_launcher)
+
             @Suppress("deprecation")
             val taskDesc = ActivityManager.TaskDescription(
-                    if (target.id == HOME_ID) getString(R.string.app_name) else getString(R.string.app_task_format, getString(target.name)),
+                if (target.id == HOME_ID)
+                    getString(R.string.app_name)
+                else
+                    getString(R.string.app_task_format, getString(target.name)),
                 bm,
                 getColorFromAttr(this, R.attr.colorSurface)
             )
@@ -1214,6 +1313,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         }
         return true
     }
+
     fun reloadTarget() = loadTarget(navTarget)
 
     private fun popBackStack(skipBeforeNavigate: Boolean = false): Boolean {
@@ -1236,6 +1336,7 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
         }
         return true
     }
+
     fun navigateUp(skipBeforeNavigate: Boolean = false) {
         if (!popBackStack(skipBeforeNavigate)) {
             super.onBackPressed()
@@ -1287,29 +1388,31 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
          |_____/|_|  \__,_| \_/\_/ \___|_|    |_|\__\___|_| |_| |_|__*/
     @Suppress("UNUSED_PARAMETER")
     private fun createDrawerItem(target: NavTarget, level: Int = 1): IDrawerItem<*> {
-        val item = DrawerPrimaryItem().apply {
+        val item = when {
-            identifier = target.id.toLong()
+            target.subItems != null -> ExpandableDrawerItem()
-            nameRes = target.name
+            level > 1 -> SecondaryDrawerItem()
-            hiddenInMiniDrawer = !app.config.ui.miniMenuButtons.contains(target.id)
+            else -> DrawerPrimaryItem()
-            if (target.description != null)
+        }
-                descriptionRes = target.description!!
+
-            if (target.icon != null)
+        item.also {
-                withIcon(target.icon!!)
+            it.identifier = target.id.toLong()
-            if (target.title != null)
+            it.nameRes = target.name
-                appTitle = getString(target.title!!)
+            it.hiddenInMiniDrawer = !app.config.ui.miniMenuButtons.contains(target.id)
-            if (target.badgeTypeId != null)
+            it.description = target.description?.toStringHolder()
-                badgeStyle = drawer.badgeStyle
+            it.icon = target.icon?.toImageHolder()
-            isSelectedBackgroundAnimated = false
+            if (it is DrawerPrimaryItem)
+                it.appTitle = target.title?.resolveString(this)
+            if (it is ColorfulBadgeable && target.badgeTypeId != null)
+                it.badgeStyle = drawer.badgeStyle
+            it.isSelectedBackgroundAnimated = false
+            it.level = level
         }
         if (target.badgeTypeId != null)
             drawer.addUnreadCounterType(target.badgeTypeId!!, target.id)
-        // TODO sub items
+
-        /*
+        item.subItems = target.subItems?.map {
-        if (target.subItems != null) {
+            createDrawerItem(it, level + 1)
-            for (subItem in target.subItems!!) {
+        }?.toMutableList() ?: mutableListOf()
-                item.subItems += createDrawerItem(subItem, level+1)
-            }
-        }*/
 
         return item
     }
@@ -1334,7 +1437,11 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             if (target.popToHome)
                 targetPopToHomeList += target.id
 
-            if (target.isInDrawer && (target.isStatic || supportedFragments.isEmpty() || supportedFragments.contains(target.id))) {
+            if (target.isInDrawer && (
+                    target.isStatic
+                    || supportedFragments.isEmpty()
+                    || supportedFragments.contains(target.id))
+            ) {
                 drawerItems += createDrawerItem(target)
                 if (target.id == 1) {
                     targetHomeId = target.id
@@ -1367,7 +1474,8 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
     override fun onBackPressed() {
         if (!b.navView.onBackPressed()) {
             if (App.config.ui.openDrawerOnBackPressed && ((navTarget.popTo == null && navTarget.popToHome)
-                    || navTarget.id == DRAWER_ITEM_HOME)) {
+                        || navTarget.id == DRAWER_ITEM_HOME)
+            ) {
                 b.navView.drawer.toggle()
             } else {
                 navigateUp()
@@ -1376,6 +1484,11 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
     }
 
     fun error(error: ApiError) = errorSnackbar.addError(error).show()
-    fun snackbar(text: String, actionText: String? = null, onClick: (() -> Unit)? = null) = mainSnackbar.snackbar(text, actionText, onClick)
+    fun snackbar(
+        text: String,
+        actionText: String? = null,
+        onClick: (() -> Unit)? = null,
+    ) = mainSnackbar.snackbar(text, actionText, onClick)
+
     fun snackbarDismiss() = mainSnackbar.dismiss()
 }

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

@@ -109,6 +109,7 @@ const val VULCAN_HEBE_ENDPOINT_PUSH_ALL = "api/mobile/push/all"
 const val VULCAN_HEBE_ENDPOINT_TIMETABLE = "api/mobile/schedule"
 const val VULCAN_HEBE_ENDPOINT_TIMETABLE_CHANGES = "api/mobile/schedule/changes"
 const val VULCAN_HEBE_ENDPOINT_ADDRESSBOOK = "api/mobile/addressbook"
+const val VULCAN_HEBE_ENDPOINT_TEACHERS = "api/mobile/teacher"
 const val VULCAN_HEBE_ENDPOINT_EXAMS = "api/mobile/exam"
 const val VULCAN_HEBE_ENDPOINT_GRADES = "api/mobile/grade"
 const val VULCAN_HEBE_ENDPOINT_GRADE_SUMMARY = "api/mobile/grade/summary"

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/VulcanFeatures.kt

@@ -21,6 +21,7 @@ const val ENDPOINT_VULCAN_HEBE_NOTICES            = 3070
 const val ENDPOINT_VULCAN_HEBE_ATTENDANCE         = 3080
 const val ENDPOINT_VULCAN_HEBE_MESSAGES_INBOX     = 3090
 const val ENDPOINT_VULCAN_HEBE_MESSAGES_SENT      = 3100
+const val ENDPOINT_VULCAN_HEBE_TEACHERS           = 3110
 const val ENDPOINT_VULCAN_HEBE_LUCKY_NUMBER       = 3200
 
 val VulcanFeatures = listOf(
@@ -83,6 +84,7 @@ val VulcanFeatures = listOf(
 
         Feature(LOGIN_TYPE_VULCAN, FEATURE_ALWAYS_NEEDED, listOf(
                 ENDPOINT_VULCAN_HEBE_MAIN to LOGIN_METHOD_VULCAN_HEBE,
-                ENDPOINT_VULCAN_HEBE_ADDRESSBOOK to LOGIN_METHOD_VULCAN_HEBE
+                ENDPOINT_VULCAN_HEBE_ADDRESSBOOK to LOGIN_METHOD_VULCAN_HEBE,
+                ENDPOINT_VULCAN_HEBE_TEACHERS to LOGIN_METHOD_VULCAN_HEBE
         ), listOf(LOGIN_METHOD_VULCAN_HEBE))
 )

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/VulcanData.kt

@@ -27,6 +27,7 @@ class VulcanData(val data: DataVulcan, val onSuccess: () -> Unit) {
         ENDPOINT_VULCAN_HEBE_NOTICES,
         ENDPOINT_VULCAN_HEBE_MESSAGES_INBOX,
         ENDPOINT_VULCAN_HEBE_MESSAGES_SENT,
+        ENDPOINT_VULCAN_HEBE_TEACHERS,
         ENDPOINT_VULCAN_HEBE_LUCKY_NUMBER
     )
 
@@ -103,9 +104,13 @@ class VulcanData(val data: DataVulcan, val onSuccess: () -> Unit) {
                 VulcanHebePushConfig(data, lastSync, onSuccess)
             }
             ENDPOINT_VULCAN_HEBE_ADDRESSBOOK -> {
-                data.startProgress(R.string.edziennik_progress_endpoint_teachers)
+                data.startProgress(R.string.edziennik_progress_endpoint_addressbook)
                 VulcanHebeAddressbook(data, lastSync, onSuccess)
             }
+            ENDPOINT_VULCAN_HEBE_TEACHERS -> {
+                data.startProgress(R.string.edziennik_progress_endpoint_teachers)
+                VulcanHebeTeachers(data, lastSync, onSuccess)
+            }
             ENDPOINT_VULCAN_HEBE_TIMETABLE -> {
                 data.startProgress(R.string.edziennik_progress_endpoint_timetable)
                 VulcanHebeTimetable(data, lastSync, onSuccess)

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/hebe/VulcanHebeTeachers.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) Antoni Czaplicki 2021-10-15.
+ */
+
+package pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.data.hebe
+
+import pl.szczodrzynski.edziennik.DAY
+import pl.szczodrzynski.edziennik.data.api.VULCAN_HEBE_ENDPOINT_TEACHERS
+import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.DataVulcan
+import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.ENDPOINT_VULCAN_HEBE_TEACHERS
+import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.data.VulcanHebe
+import pl.szczodrzynski.edziennik.getString
+
+class VulcanHebeTeachers(
+    override val data: DataVulcan,
+    override val lastSync: Long?,
+    val onSuccess: (endpointId: Int) -> Unit,
+) : VulcanHebe(data, lastSync) {
+    companion object {
+        const val TAG = "VulcanHebeTeachers"
+    }
+
+    init {
+        apiGetList(
+            TAG,
+            VULCAN_HEBE_ENDPOINT_TEACHERS,
+            HebeFilterType.BY_PERIOD,
+            lastSync = lastSync,
+        ) { list, _ ->
+            list.forEach { person ->
+                val name = person.getString("Name")
+                val surname = person.getString("Surname")
+                val displayName = person.getString("DisplayName")
+                val subjectName = person.getString("Description") ?: return@apiGetList
+
+                val teacher = data.getTeacherByFirstLast(
+                    name?.plus(" ")?.plus(surname) ?: displayName ?: return@forEach
+                )
+
+                teacher.addSubject(data.getSubject(null, subjectName).id)
+            }
+            data.setSyncNext(ENDPOINT_VULCAN_HEBE_TEACHERS, 2 * DAY)
+            onSuccess(ENDPOINT_VULCAN_HEBE_TEACHERS)
+        }
+    }
+}

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

@@ -43,7 +43,7 @@ import pl.szczodrzynski.edziennik.data.db.migration.*
     LibrusLesson::class,
     TimetableManual::class,
     Metadata::class
-], version = 95)
+], version = 96)
 @TypeConverters(
         ConverterTime::class,
         ConverterDate::class,
@@ -181,6 +181,7 @@ abstract class AppDb : RoomDatabase() {
                 Migration93(),
                 Migration94(),
                 Migration95(),
+                Migration96(),
         ).allowMainThreadQueries().build()
     }
 }

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

@@ -9,10 +9,7 @@ import android.graphics.Bitmap
 import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.Ignore
-import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.*
-import pl.szczodrzynski.edziennik.fixName
-import pl.szczodrzynski.edziennik.getNameInitials
-import pl.szczodrzynski.edziennik.join
 import java.util.*
 
 @Entity(tableName = "teachers",
@@ -26,6 +23,7 @@ open class Teacher {
         const val TYPE_SECRETARIAT = 4 // 16
         const val TYPE_PRINCIPAL = 5 // 32
         const val TYPE_SCHOOL_ADMIN = 6 // 64
+
         // not teachers
         const val TYPE_SPECIALIST = 7 // 128
         const val TYPE_SUPER_ADMIN = 10 // 1024
@@ -36,7 +34,8 @@ open class Teacher {
         const val TYPE_OTHER = 24 // 16777216
         const val IS_TEACHER_MASK = 127
 
-        val types: List<Int> by lazy { listOf(
+        val types: List<Int> by lazy {
+            listOf(
                 TYPE_TEACHER,
                 TYPE_EDUCATOR,
                 TYPE_PEDAGOGUE,
@@ -51,7 +50,8 @@ open class Teacher {
                 TYPE_PARENTS_COUNCIL,
                 TYPE_SCHOOL_PARENTS_COUNCIL,
                 TYPE_OTHER
-        ) }
+            )
+        }
 
         fun typeName(c: Context, type: Int, typeDescription: String? = null): String {
             val suffix = typeDescription?.let { " ($typeDescription)" } ?: ""
@@ -94,6 +94,9 @@ open class Teacher {
     @ColumnInfo(name = "teacherTypeDescription")
     var typeDescription: String? = null
 
+    @ColumnInfo(name = "teacherSubjects")
+    var subjects = mutableListOf<Long>()
+
     fun isType(checkingType: Int): Boolean {
         return type and (1 shl checkingType) >= 1
     }
@@ -105,6 +108,8 @@ open class Teacher {
         type = type or (1 shl i)
     }
 
+    fun addSubject(subjectId: Long) = subjects.add(subjectId)
+
     fun unsetTeacherType(i: Int) {
         type = type and (1 shl i).inv()
     }
@@ -128,6 +133,7 @@ open class Teacher {
      */
     @Ignore
     var recipientDisplayName: CharSequence? = null
+
     /**
      * Used in Message composing - determining the priority
      * of search result, based on the search phrase match
@@ -142,8 +148,6 @@ open class Teacher {
         this.id = id
     }
 
-
-
     @Ignore
     constructor(profileId: Int, id: Long, name: String, surname: String) {
         this.profileId = profileId
@@ -170,6 +174,7 @@ open class Teacher {
             this.surname = it.surname
             this.type = it.type
             this.typeDescription = it.typeDescription
+            this.subjects = it.subjects
             this.image = it.image
             this.recipientDisplayName = it.recipientDisplayName
         }
@@ -195,6 +200,7 @@ open class Teacher {
                 ", name='" + name + '\'' +
                 ", surname='" + surname + '\'' +
                 ", type=" + dumpType() +
+                ", subjects=" + subjects.joinToString() +
                 ", typeDescription='" + typeDescription + '\'' +
                 '}'
     }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/migration/Migration96.kt

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) Antoni Czaplicki 2021-10-17.
+ */
+
+package pl.szczodrzynski.edziennik.data.db.migration
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration96 : Migration(95, 96) {
+    override fun migrate(database: SupportSQLiteDatabase) {
+        // teachers - associated subjects list
+        database.execSQL("ALTER TABLE teachers ADD COLUMN teacherSubjects TEXT NOT NULL;")
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/compose/MessagesComposeSuggestionAdapter.kt

@@ -30,7 +30,7 @@ class MessagesComposeSuggestionAdapter(
     private val comparator by lazy { Comparator { o1: Teacher, o2: Teacher -> o1.recipientWeight - o2.recipientWeight } }
 
     override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
-        val listItem = convertView ?: LayoutInflater.from(context).inflate(R.layout.messages_compose_suggestion_item, parent, false)
+        val listItem = convertView ?: LayoutInflater.from(context).inflate(R.layout.teacher_item, parent, false)
 
         val teacher = teacherList[position]
         val name = listItem.findViewById<TextView>(R.id.name)

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/teachers/TeachersAdapter.kt

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) Antoni Czaplicki 2021-10-15.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.teachers
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.RecyclerView
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.data.db.entity.Teacher
+import pl.szczodrzynski.edziennik.databinding.TeacherItemBinding
+import pl.szczodrzynski.edziennik.isNotNullNorEmpty
+import pl.szczodrzynski.edziennik.ui.modules.messages.MessagesUtils.getProfileImage
+import pl.szczodrzynski.edziennik.utils.BetterLink
+import kotlin.coroutines.CoroutineContext
+
+class TeachersAdapter(
+    private val activity: AppCompatActivity,
+    val onItemClick: ((item: Teacher) -> Unit)? = null,
+) : RecyclerView.Adapter<TeachersAdapter.ViewHolder>(), CoroutineScope {
+    companion object {
+        private const val TAG = "TeachersAdapter"
+    }
+
+    private val app = activity.applicationContext as App
+    // optional: place the manager here
+
+    private val job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    var items = listOf<Teacher>()
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val inflater = LayoutInflater.from(activity)
+        val view = TeacherItemBinding.inflate(inflater, parent, false)
+        return ViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val item = items[position]
+        val b = holder.b
+
+        b.name.text = item.fullName
+        b.image.setImageBitmap(item.image?: getProfileImage(48, 24, 16, 12, 1, item.fullName))
+        var role = item.getTypeText(activity)
+        if (item.subjects.isNotNullNorEmpty()) {
+            val subjects = item.subjects.map { App.db.subjectDao().getByIdNow(App.profileId, it).longName }
+            role = role.plus(": ").plus(subjects.joinToString())
+        }
+        b.type.text = role
+
+        item.fullName.let { name ->
+            BetterLink.attach(
+                b.name,
+                teachers = mapOf(item.id to name)
+            )
+        }
+    }
+
+    override fun getItemCount() = items.size
+
+    class ViewHolder(val b: TeacherItemBinding) : RecyclerView.ViewHolder(b.root)
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/teachers/TeachersListFragment.kt

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) Antoni Czaplicki 2021-10-15.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.teachers
+
+import android.app.Activity
+import android.content.Intent
+import android.os.AsyncTask
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.core.view.isVisible
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.Observer
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import pl.szczodrzynski.edziennik.*
+import pl.szczodrzynski.edziennik.databinding.TeachersListFragmentBinding
+import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+import pl.szczodrzynski.edziennik.utils.Utils
+import pl.szczodrzynski.navlib.bottomsheet.items.BottomSheetPrimaryItem
+import kotlin.coroutines.CoroutineContext
+
+class TeachersListFragment : Fragment(), CoroutineScope {
+    companion object {
+        private const val TAG = "TeachersListFragment"
+    }
+
+    private lateinit var app: App
+    private lateinit var activity: MainActivity
+    private lateinit var b: TeachersListFragmentBinding
+
+    private val job: Job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    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 = TeachersListFragmentBinding.inflate(inflater)
+        return b.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) { startCoroutineTimer(100L) {
+        if (!isAdded) return@startCoroutineTimer
+
+        val adapter = TeachersAdapter(activity)
+
+        app.db.teacherDao().getAllTeachers(App.profileId).observe(this@TeachersListFragment, Observer { items ->
+            if (!isAdded) return@Observer
+
+            // load & configure the adapter
+            adapter.items = items
+            if (items.isNotNullNorEmpty() && b.list.adapter == null) {
+                b.list.adapter = adapter
+                b.list.apply {
+                    setHasFixedSize(true)
+                    layoutManager = LinearLayoutManager(context)
+                    addItemDecoration(SimpleDividerItemDecoration(context))
+                }
+            }
+            adapter.notifyDataSetChanged()
+
+            // show/hide relevant views
+            b.progressBar.isVisible = false
+            if (items.isNullOrEmpty()) {
+                b.list.isVisible = false
+                b.noData.isVisible = true
+            } else {
+                b.list.isVisible = true
+                b.noData.isVisible = false
+            }
+        })
+    }}
+}

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

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Antoni Czaplicki 2021-10-15.
+  -->
+
+<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">
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <ProgressBar
+            android:id="@+id/progressBar"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center" />
+
+        <androidx.appcompat.widget.AppCompatTextView
+            android:id="@+id/noData"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:drawablePadding="16dp"
+            android:fontFamily="sans-serif-light"
+            android:gravity="center"
+            android:padding="16dp"
+            android:text="@string/teachers_no_data"
+            android:textSize="24sp"
+            android:visibility="gone"
+            app:drawableTopCompat="@drawable/ic_archive"
+            tools:visibility="visible" />
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/list"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:visibility="gone"
+            tools:listitem="@layout/teacher_item"
+            tools:visibility="visible" />
+    </FrameLayout>
+</layout>

app/src/main/res/values-de/strings.xml

@@ -656,6 +656,7 @@
     <string name="menu_message">Nachricht</string>
     <string name="menu_message_compose">Schreiben Sie eine Nachricht</string>
     <string name="menu_messages">Nachrichten</string>
+    <string name="menu_more">Mehr</string>
     <string name="menu_notices">Verhalten</string>
     <string name="menu_notifications">Benachrichtigungen</string>
     <string name="menu_remove_notifications">Löschen</string>
@@ -1108,6 +1109,7 @@
     <string name="teacher_super_admin">Administrator / Superadministrator</string>
     <string name="teacher_teacher">Lehrer</string>
     <string name="teachers_browse_category">Kategorie durchsuchen</string>
+    <string name="teachers_no_data">Keine Lehrer.</string>
     <string name="the_day_after">Übermorgen</string>
     <string name="the_day_before">Vorgestern</string>
     <string name="theme_amber">Bernstein</string>
@@ -1236,4 +1238,6 @@
     <string name="login_summary_account_parent">(Elternteil)</string>
     <string name="settings_about_contributors_text">Anwendungsentwickler</string>
     <string name="settings_about_contributors_subtext">Liste der Szkolny-Entwickler</string>
+    <string name="menu_teachers">Lehrer</string>
+    <string name="edziennik_progress_endpoint_addressbook">Addressbuch herunterladen…</string>
 </resources>

app/src/main/res/values-en/strings.xml

@@ -658,6 +658,7 @@
     <string name="menu_message">Message</string>
     <string name="menu_message_compose">Compose</string>
     <string name="menu_messages">Messages</string>
+    <string name="menu_more">More</string>
     <string name="menu_notices">Behaviour</string>
     <string name="menu_notifications">Notifications</string>
     <string name="menu_remove_notifications">Clear</string>
@@ -1110,6 +1111,7 @@
     <string name="teacher_super_admin">SuperAdmin</string>
     <string name="teacher_teacher">Teacher</string>
     <string name="teachers_browse_category">Browse category</string>
+    <string name="teachers_no_data">No teachers.</string>
     <string name="the_day_after">overmorrow</string>
     <string name="the_day_before">the day before yesterday</string>
     <string name="theme_amber">Amber</string>
@@ -1372,4 +1374,6 @@
     <string name="permissions_generate_timetable">In order to be able to save the generated timetable, you must grant access rights to the device\'s memory.\n\nClick OK to grant permissions.</string>
     <string name="login_summary_account_child">(Child)</string>
     <string name="login_summary_account_parent">(Parent)</string>
+    <string name="menu_teachers">Teachers</string>
+    <string name="edziennik_progress_endpoint_addressbook">Syncing addressbook…</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -301,6 +301,7 @@
     <string name="edziennik_notification_api_text">Dzięki niej, aplikacja Szkolny.eu może synchronizować dane z e-dziennikiem. Możesz ją zamknąć, ponieważ w tej chwili nic nie robi.</string>
     <string name="edziennik_notification_api_title">Usługa synchronizacji</string>
     <string name="edziennik_progress_endpoint_account_details">Pobieranie szczegółów konta…</string>
+    <string name="edziennik_progress_endpoint_addressbook">Pobieranie listy odbiorców…</string>
     <string name="edziennik_progress_endpoint_announcements">Pobieranie ogłoszeń szkolnych…</string>
     <string name="edziennik_progress_endpoint_attendance">Pobieranie frekwencji ucznia…</string>
     <string name="edziennik_progress_endpoint_attendance_types">Pobieranie kategorii obecności…</string>
@@ -708,6 +709,7 @@
     <string name="menu_message">Wiadomość</string>
     <string name="menu_message_compose">Napisz wiadomość</string>
     <string name="menu_messages">Wiadomości</string>
+    <string name="menu_more">Więcej</string>
     <string name="menu_notices">Zachowanie</string>
     <string name="menu_notifications">Powiadomienia</string>
     <string name="menu_remove_notifications">Usuń wszystkie</string>
@@ -716,6 +718,7 @@
     <string name="menu_settings">Ustawienia</string>
     <string name="menu_sync">Synchronizuj</string>
     <string name="menu_sync_all">Synchronizuj wszystkie</string>
+    <string name="menu_teachers">Nauczyciele</string>
     <string name="menu_template">Szablon</string>
     <string name="menu_timetable">Plan lekcji</string>
     <string name="menu_timetable_manual">Edytor planu lekcji</string>
@@ -1180,6 +1183,7 @@
     <string name="teacher_super_admin">Administrator / SuperAdministrator</string>
     <string name="teacher_teacher">Nauczyciel</string>
     <string name="teachers_browse_category">Przeglądaj kategorię</string>
+    <string name="teachers_no_data">Brak nauczycieli.</string>
     <string name="the_day_after">pojutrze</string>
     <string name="the_day_before">przedwczoraj</string>
     <string name="theme_amber">Bursztynowy</string>