Add excusing for absence (#533)

app/src/androidTest/java/io/github/wulkanowy/data/repositories/attendance/AttendanceLocalTest.kt

@@ -35,9 +35,9 @@ class AttendanceLocalTest {
     @Test
     fun saveAndReadTest() {
         attendanceLocal.saveAttendance(listOf(
-                Attendance(1, 2, LocalDate.of(2018, 9, 10), 0, "", "", false, false, false, false, false, false),
+            Attendance(1, 2, 3, LocalDate.of(2018, 9, 10), 0, "", "", false, false, false, false, false, false, false, SentExcuseStatus.ACCEPTED.name),
-                Attendance(1, 2, LocalDate.of(2018, 9, 14), 0, "", "", false, false, false, false, false, false),
+            Attendance(1, 2, 3, LocalDate.of(2018, 9, 14), 0, "", "", false, false, false, false, false, false, false, SentExcuseStatus.WAITING.name),
-                Attendance(1, 2, LocalDate.of(2018, 9, 17), 0, "", "", false, false, false, false, false, false)
+            Attendance(1, 2, 3, LocalDate.of(2018, 9, 17), 0, "", "", false, false, false, false, false, false, false, SentExcuseStatus.ACCEPTED.name)
         ))
 
         val attendance = attendanceLocal

app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TestTimetableEntityCreator.kt

@@ -2,8 +2,8 @@ package io.github.wulkanowy.data.repositories.timetable
 
 import org.threeten.bp.LocalDateTime
 import org.threeten.bp.LocalDateTime.now
-import io.github.wulkanowy.sdk.pojo.Timetable as TimetableRemote
 import io.github.wulkanowy.data.db.entities.Timetable as TimetableLocal
+import io.github.wulkanowy.sdk.pojo.Timetable as TimetableRemote
 
 fun createTimetableLocal(start: LocalDateTime, number: Int, room: String = "", subject: String = "", teacher: String = "", changes: Boolean = false): TimetableLocal {
     return TimetableLocal(

app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt

@@ -61,6 +61,7 @@ import io.github.wulkanowy.data.db.migrations.Migration18
 import io.github.wulkanowy.data.db.migrations.Migration19
 import io.github.wulkanowy.data.db.migrations.Migration2
 import io.github.wulkanowy.data.db.migrations.Migration20
+import io.github.wulkanowy.data.db.migrations.Migration21
 import io.github.wulkanowy.data.db.migrations.Migration3
 import io.github.wulkanowy.data.db.migrations.Migration4
 import io.github.wulkanowy.data.db.migrations.Migration5
@@ -102,7 +103,7 @@ import javax.inject.Singleton
 abstract class AppDatabase : RoomDatabase() {
 
     companion object {
-        const val VERSION_SCHEMA = 20
+        const val VERSION_SCHEMA = 21
 
         fun getMigrations(sharedPrefProvider: SharedPrefProvider): Array<Migration> {
             return arrayOf(
@@ -124,7 +125,8 @@ abstract class AppDatabase : RoomDatabase() {
                 Migration17(),
                 Migration18(),
                 Migration19(sharedPrefProvider),
-                Migration20()
+                Migration20(),
+                Migration21()
             )
         }
 

app/src/main/java/io/github/wulkanowy/data/db/entities/Attendance.kt

@@ -15,6 +15,9 @@ data class Attendance(
     @ColumnInfo(name = "diary_id")
     val diaryId: Int,
 
+    @ColumnInfo(name = "time_id")
+    val timeId: Int,
+
     val date: LocalDate,
 
     val number: Int,
@@ -33,7 +36,13 @@ data class Attendance(
 
     val excused: Boolean,
 
-    val deleted: Boolean
+    val deleted: Boolean,
+
+    val excusable: Boolean,
+
+    @ColumnInfo(name = "excuse_status")
+    val excuseStatus: String?
+
 ) : Serializable {
 
     @PrimaryKey(autoGenerate = true)

app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration21.kt

@@ -0,0 +1,13 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration21 : Migration(20, 21) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("ALTER TABLE Attendance ADD COLUMN excusable INTEGER NOT NULL DEFAULT 0")
+        database.execSQL("ALTER TABLE Attendance ADD COLUMN time_id INTEGER NOT NULL DEFAULT 0")
+        database.execSQL("ALTER TABLE Attendance ADD COLUMN excuse_status TEXT DEFAULT NULL")
+    }
+}

app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemote.kt

@@ -3,8 +3,11 @@ package io.github.wulkanowy.data.repositories.attendance
 import io.github.wulkanowy.data.db.entities.Attendance
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.Absent
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
+import org.threeten.bp.LocalDateTime
+import org.threeten.bp.LocalTime
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -19,6 +22,7 @@ class AttendanceRemote @Inject constructor(private val sdk: Sdk) {
                         studentId = semester.studentId,
                         diaryId = semester.diaryId,
                         date = it.date,
+                        timeId = it.timeId,
                         number = it.number,
                         subject = it.subject,
                         name = it.name,
@@ -27,9 +31,20 @@ class AttendanceRemote @Inject constructor(private val sdk: Sdk) {
                         exemption = it.exemption,
                         lateness = it.lateness,
                         excused = it.excused,
-                        deleted = it.deleted
+                        deleted = it.deleted,
+                        excusable = it.excusable,
+                        excuseStatus = it.excuseStatus?.name
                     )
                 }
             }
     }
+
+    fun excuseAbsence(semester: Semester, absenceList: List<Attendance>, reason: String?): Single<Boolean> {
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).excuseForAbsence(absenceList.map { attendance ->
+            Absent(
+                date = LocalDateTime.of(attendance.date, LocalTime.of(0, 0)),
+                timeId = attendance.timeId
+            )
+        }, reason)
+    }
 }

app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRepository.kt

@@ -41,4 +41,8 @@ class AttendanceRepository @Inject constructor(
                     }).map { list -> list.filter { it.date in startDate..endDate } }
             }
     }
+
+    fun excuseForAbsence(semester: Semester, attendanceList: List<Attendance>, reason: String? = null): Single<Boolean> {
+        return remote.excuseAbsence(semester, attendanceList, reason)
+    }
 }

app/src/main/java/io/github/wulkanowy/data/repositories/attendance/SentExcuseStatus.kt

@@ -0,0 +1,7 @@
+package io.github.wulkanowy.data.repositories.attendance
+
+enum class SentExcuseStatus(val id: Int = 0) {
+    WAITING,
+    ACCEPTED,
+    DENIED
+}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceAdapter.kt

@@ -0,0 +1,12 @@
+package io.github.wulkanowy.ui.modules.attendance
+
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.IFlexible
+import io.github.wulkanowy.data.db.entities.Attendance
+
+class AttendanceAdapter<T : IFlexible<*>> : FlexibleAdapter<T>(null, null, true) {
+
+    var excuseActionMode: Boolean = false
+
+    var onExcuseCheckboxSelect: (attendanceItem: Attendance, checked: Boolean) -> Unit = { _, _ -> }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt

@@ -1,5 +1,6 @@
 package io.github.wulkanowy.ui.modules.attendance
 
+import android.content.DialogInterface.BUTTON_POSITIVE
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.Menu
@@ -10,8 +11,9 @@ import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
 import android.view.ViewGroup
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.view.ActionMode
 import com.wdullaer.materialdatetimepicker.date.DatePickerDialog
-import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
@@ -24,6 +26,7 @@ import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.SchooldaysRangeLimiter
 import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemClickListener
+import kotlinx.android.synthetic.main.dialog_excuse.*
 import kotlinx.android.synthetic.main.fragment_attendance.*
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
@@ -35,7 +38,13 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
     lateinit var presenter: AttendancePresenter
 
     @Inject
-    lateinit var attendanceAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var attendanceAdapter: AttendanceAdapter<AbstractFlexibleItem<*>>
+
+    override val excuseSuccessString: String
+        get() = getString(R.string.attendance_excuse_success)
+
+    override val excuseNoSelectionString: String
+        get() = getString(R.string.attendance_excuse_no_selection)
 
     companion object {
         private const val SAVED_DATE_KEY = "CURRENT_DATE"
@@ -49,6 +58,34 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
 
     override val currentStackSize get() = (activity as? MainActivity)?.currentStackSize
 
+    override val excuseActionMode: Boolean get() = attendanceAdapter.excuseActionMode
+
+    private var actionMode: ActionMode? = null
+    private val actionModeCallback = object : ActionMode.Callback {
+        override fun onCreateActionMode(mode: ActionMode, menu: Menu): Boolean {
+            val inflater = mode.menuInflater
+            inflater.inflate(R.menu.context_menu_excuse, menu)
+            return true
+        }
+
+        override fun onPrepareActionMode(mode: ActionMode, menu: Menu): Boolean {
+            mode.title = getString(R.string.attendance_excuse_title)
+            return presenter.onPrepareActionMode()
+        }
+
+        override fun onDestroyActionMode(mode: ActionMode) {
+            presenter.onDestroyActionMode()
+            actionMode = null
+        }
+
+        override fun onActionItemClicked(mode: ActionMode, menu: MenuItem): Boolean {
+            return when (menu.itemId) {
+                R.id.excuseMenuSubmit -> presenter.onExcuseSubmitButtonClick()
+                else -> false
+            }
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setHasOptionsMenu(true)
@@ -66,6 +103,7 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
 
     override fun initView() {
         attendanceAdapter.setOnItemClickListener(presenter::onAttendanceItemSelected)
+        attendanceAdapter.onExcuseCheckboxSelect = presenter::onExcuseCheckboxSelect
 
         with(attendanceRecycler) {
             layoutManager = SmoothScrollLinearLayoutManager(context)
@@ -83,6 +121,8 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
         attendanceNavDate.setOnClickListener { presenter.onPickDate() }
         attendanceNextButton.setOnClickListener { presenter.onNextDay() }
 
+        attendanceExcuseButton.setOnClickListener { presenter.onExcuseButtonClick() }
+
         attendanceNavContainer.setElevationCompat(requireContext().dpToPx(8f))
     }
 
@@ -115,6 +155,10 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
         if (::presenter.isInitialized) presenter.onViewReselected()
     }
 
+    override fun onFragmentChanged() {
+        if (::presenter.isInitialized) presenter.onMainViewChanged()
+    }
+
     override fun popView() {
         (activity as? MainActivity)?.popView()
     }
@@ -155,6 +199,10 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
         attendanceNextButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
+    override fun showExcuseButton(show: Boolean) {
+        attendanceExcuseButton.visibility = if (show) VISIBLE else GONE
+    }
+
     override fun showAttendanceDialog(lesson: Attendance) {
         (activity as? MainActivity)?.showDialogFragment(AttendanceDialog.newInstance(lesson))
     }
@@ -174,10 +222,38 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
         }
     }
 
+    override fun showExcuseDialog() {
+        AlertDialog.Builder(requireContext())
+            .setTitle(R.string.attendance_excuse_title)
+            .setView(R.layout.dialog_excuse)
+            .setNegativeButton(android.R.string.cancel) { _, _ -> }
+            .create()
+            .apply {
+                setButton(BUTTON_POSITIVE, getString(R.string.attendance_excuse_dialog_submit)) { _, _ ->
+                    presenter.onExcuseDialogSubmit(excuseReason.text?.toString().orEmpty())
+                }
+            }.show()
+    }
+
     override fun openSummaryView() {
         (activity as? MainActivity)?.pushView(AttendanceSummaryFragment.newInstance())
     }
 
+    override fun startActionMode() {
+        actionMode = (activity as MainActivity?)?.startSupportActionMode(actionModeCallback)
+    }
+
+    override fun showExcuseCheckboxes(show: Boolean) {
+        attendanceAdapter.apply {
+            excuseActionMode = show
+            notifyDataSetChanged()
+        }
+    }
+
+    override fun finishActionMode() {
+        actionMode?.finish()
+    }
+
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
         outState.putLong(SAVED_DATE_KEY, presenter.currentDate.toEpochDay())

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceItem.kt

@@ -1,18 +1,22 @@
 package io.github.wulkanowy.ui.modules.attendance
 
 import android.view.View
+import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
+import androidx.core.view.isVisible
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import eu.davidea.flexibleadapter.items.IFlexible
 import eu.davidea.viewholders.FlexibleViewHolder
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Attendance
+import io.github.wulkanowy.data.repositories.attendance.SentExcuseStatus
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.item_attendance.*
 
-class AttendanceItem(val attendance: Attendance) : AbstractFlexibleItem<AttendanceItem.ViewHolder>() {
+class AttendanceItem(val attendance: Attendance) :
+    AbstractFlexibleItem<AttendanceItem.ViewHolder>() {
 
     override fun getLayoutRes() = R.layout.item_attendance
 
@@ -26,6 +30,34 @@ class AttendanceItem(val attendance: Attendance) : AbstractFlexibleItem<Attendan
             attendanceItemSubject.text = attendance.subject
             attendanceItemDescription.text = attendance.name
             attendanceItemAlert.visibility = attendance.run { if (absence && !excused) VISIBLE else INVISIBLE }
+            attendanceItemNumber.visibility = GONE
+            attendanceItemExcuseInfo.visibility = GONE
+            attendanceItemExcuseCheckbox.visibility = GONE
+            attendanceItemExcuseCheckbox.isChecked = false
+            attendanceItemExcuseCheckbox.setOnCheckedChangeListener { _, checked ->
+                (adapter as AttendanceAdapter).onExcuseCheckboxSelect(attendance, checked)
+            }
+
+            when (if (attendance.excuseStatus != null) SentExcuseStatus.valueOf(attendance.excuseStatus) else null) {
+                SentExcuseStatus.WAITING -> {
+                    attendanceItemExcuseInfo.setImageResource(R.drawable.ic_excuse_waiting)
+                    attendanceItemExcuseInfo.visibility = VISIBLE
+                    attendanceItemAlert.visibility = INVISIBLE
+                }
+                SentExcuseStatus.DENIED -> {
+                    attendanceItemExcuseInfo.setImageResource(R.drawable.ic_excuse_denied)
+                    attendanceItemExcuseInfo.visibility = VISIBLE
+                }
+                else -> {
+                    if (attendance.excusable && (adapter as AttendanceAdapter).excuseActionMode) {
+                        attendanceItemNumber.visibility = GONE
+                        attendanceItemExcuseCheckbox.visibility = VISIBLE
+                    } else {
+                        attendanceItemNumber.visibility = VISIBLE
+                        attendanceItemExcuseCheckbox.visibility = GONE
+                    }
+                }
+            }
         }
     }
 
@@ -46,8 +78,20 @@ class AttendanceItem(val attendance: Attendance) : AbstractFlexibleItem<Attendan
         return result
     }
 
-    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
+    class ViewHolder(view: View, val adapter: FlexibleAdapter<*>) :
+        FlexibleViewHolder(view, adapter),
+        LayoutContainer {
+
         override val containerView: View
             get() = contentView
+
+        override fun onClick(view: View?) {
+            super.onClick(view)
+            attendanceItemExcuseCheckbox.apply {
+                if ((adapter as AttendanceAdapter).excuseActionMode && isVisible) {
+                    isChecked = !isChecked
+                }
+            }
+        }
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceModule.kt

@@ -0,0 +1,12 @@
+package io.github.wulkanowy.ui.modules.attendance
+
+import dagger.Module
+import dagger.Provides
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+
+@Module
+class AttendanceModule {
+
+    @Provides
+    fun provideAttendanceFlexibleAdapter() = AttendanceAdapter<AbstractFlexibleItem<*>>()
+}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt

@@ -2,6 +2,7 @@ package io.github.wulkanowy.ui.modules.attendance
 
 import android.annotation.SuppressLint
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.db.entities.Attendance
 import io.github.wulkanowy.data.repositories.attendance.AttendanceRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
@@ -40,6 +41,8 @@ class AttendancePresenter @Inject constructor(
 
     private lateinit var lastError: Throwable
 
+    private val attendanceToExcuseList = mutableListOf<Attendance>()
+
     fun onAttachView(view: AttendanceView, date: Long?) {
         super.onAttachView(view)
         view.initView()
@@ -51,11 +54,15 @@ class AttendancePresenter @Inject constructor(
     }
 
     fun onPreviousDay() {
+        view?.finishActionMode()
+        attendanceToExcuseList.clear()
         loadData(currentDate.previousSchoolDay)
         reloadView()
     }
 
     fun onNextDay() {
+        view?.finishActionMode()
+        attendanceToExcuseList.clear()
         loadData(currentDate.nextSchoolDay)
         reloadView()
     }
@@ -100,10 +107,59 @@ class AttendancePresenter @Inject constructor(
         }
     }
 
+    fun onMainViewChanged() {
+        view?.finishActionMode()
+    }
+
     fun onAttendanceItemSelected(item: AbstractFlexibleItem<*>?) {
-        if (item is AttendanceItem) {
+        view?.apply {
+            if (item is AttendanceItem && !excuseActionMode) {
                 Timber.i("Select attendance item ${item.attendance.id}")
-            view?.showAttendanceDialog(item.attendance)
+                showAttendanceDialog(item.attendance)
+            }
+        }
+    }
+
+    fun onExcuseButtonClick() {
+        view?.startActionMode()
+    }
+
+    fun onExcuseCheckboxSelect(attendanceItem: Attendance, checked: Boolean) {
+        if (checked) attendanceToExcuseList.add(attendanceItem)
+        else attendanceToExcuseList.remove(attendanceItem)
+    }
+
+    fun onExcuseSubmitButtonClick(): Boolean {
+        view?.apply {
+            return if (attendanceToExcuseList.isNotEmpty()) {
+                showExcuseDialog()
+                true
+            } else {
+                showMessage(excuseNoSelectionString)
+                false
+            }
+        }
+        return false
+    }
+
+    fun onExcuseDialogSubmit(reason: String) {
+        view?.finishActionMode()
+        excuseAbsence(if (reason != "") reason else null, attendanceToExcuseList.toList())
+    }
+
+    fun onPrepareActionMode(): Boolean {
+        view?.apply {
+            showExcuseCheckboxes(true)
+            showExcuseButton(false)
+        }
+        attendanceToExcuseList.clear()
+        return true
+    }
+
+    fun onDestroyActionMode() {
+        view?.apply {
+            showExcuseCheckboxes(false)
+            showExcuseButton(true)
         }
     }
 
@@ -157,6 +213,7 @@ class AttendancePresenter @Inject constructor(
                         showEmpty(it.isEmpty())
                         showErrorView(false)
                         showContent(it.isNotEmpty())
+                        showExcuseButton(it.any { item -> item.attendance.excusable })
                     }
                     analytics.logEvent("load_attendance", "items" to it.size, "force_refresh" to forceRefresh)
                 }) {
@@ -167,6 +224,39 @@ class AttendancePresenter @Inject constructor(
         }
     }
 
+    private fun excuseAbsence(reason: String?, toExcuseList: List<Attendance>) {
+        Timber.i("Excusing absence started")
+        disposable.apply {
+            add(studentRepository.getCurrentStudent()
+                .delay(200, MILLISECONDS)
+                .flatMap { semesterRepository.getCurrentSemester(it) }
+                .flatMap { attendanceRepository.excuseForAbsence(it, toExcuseList, reason) }
+                .subscribeOn(schedulers.backgroundThread)
+                .observeOn(schedulers.mainThread)
+                .doOnSubscribe {
+                    view?.apply {
+                        showProgress(true)
+                        showContent(false)
+                        showExcuseButton(false)
+                    }
+                }
+                .subscribe({
+                    Timber.i("Excusing for absence result: Success")
+                    analytics.logEvent("excuse_absence", "items" to attendanceToExcuseList.size)
+                    attendanceToExcuseList.clear()
+                    view?.apply {
+                        showExcuseButton(false)
+                        showMessage(excuseSuccessString)
+                    }
+                    loadData(currentDate, true)
+                }) {
+                    Timber.i("Excusing for absence result: An exception occurred")
+                    view?.showProgress(false)
+                    errorHandler.dispatch(it)
+                })
+        }
+    }
+
     private fun showErrorViewOnError(message: String, error: Throwable) {
         view?.run {
             if (isViewEmpty) {

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt

@@ -10,6 +10,12 @@ interface AttendanceView : BaseView {
 
     val currentStackSize: Int?
 
+    val excuseSuccessString: String
+
+    val excuseNoSelectionString: String
+
+    val excuseActionMode: Boolean
+
     fun initView()
 
     fun updateData(data: List<AttendanceItem>)
@@ -38,11 +44,21 @@ interface AttendanceView : BaseView {
 
     fun showNextButton(show: Boolean)
 
+    fun showExcuseButton(show: Boolean)
+
     fun showAttendanceDialog(lesson: Attendance)
 
     fun showDatePickerDialog(currentDate: LocalDate)
 
+    fun showExcuseDialog()
+
     fun openSummaryView()
 
+    fun startActionMode()
+
+    fun showExcuseCheckboxes(show: Boolean)
+
+    fun finishActionMode()
+
     fun popView()
 }

app/src/main/java/io/github/wulkanowy/ui/modules/main/MainActivity.kt

@@ -36,6 +36,7 @@ import io.github.wulkanowy.utils.getThemeAttrColor
 import io.github.wulkanowy.utils.safelyPopFragments
 import io.github.wulkanowy.utils.setOnViewChangeListener
 import kotlinx.android.synthetic.main.activity_main.*
+import timber.log.Timber
 import javax.inject.Inject
 
 class MainActivity : BaseActivity<MainPresenter>(), MainView {
@@ -167,6 +168,11 @@ class MainActivity : BaseActivity<MainPresenter>(), MainView {
         (navController.currentStack?.getOrNull(0) as? MainView.MainChildView)?.onFragmentReselected()
     }
 
+    override fun notifyMenuViewChanged() {
+        Timber.d("Menu view changed")
+        (navController.currentStack?.getOrNull(0) as? MainView.MainChildView)?.onFragmentChanged()
+    }
+
     fun showDialogFragment(dialog: DialogFragment) {
         navController.showDialogFragment(dialog)
     }

app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt

@@ -13,6 +13,7 @@ import io.github.wulkanowy.ui.modules.about.license.LicenseFragment
 import io.github.wulkanowy.ui.modules.about.license.LicenseModule
 import io.github.wulkanowy.ui.modules.account.AccountDialog
 import io.github.wulkanowy.ui.modules.attendance.AttendanceFragment
+import io.github.wulkanowy.ui.modules.attendance.AttendanceModule
 import io.github.wulkanowy.ui.modules.attendance.summary.AttendanceSummaryFragment
 import io.github.wulkanowy.ui.modules.exam.ExamFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
@@ -51,7 +52,7 @@ abstract class MainModule {
     }
 
     @PerFragment
-    @ContributesAndroidInjector
+    @ContributesAndroidInjector(modules = [AttendanceModule::class])
     abstract fun bindAttendanceFragment(): AttendanceFragment
 
     @PerFragment

app/src/main/java/io/github/wulkanowy/ui/modules/main/MainPresenter.kt

@@ -75,6 +75,7 @@ class MainPresenter @Inject constructor(
                 notifyMenuViewReselected()
                 false
             } else {
+                notifyMenuViewChanged()
                 switchMenuView(index)
                 true
             }

app/src/main/java/io/github/wulkanowy/ui/modules/main/MainView.kt

@@ -26,6 +26,8 @@ interface MainView : BaseView {
 
     fun notifyMenuViewReselected()
 
+    fun notifyMenuViewChanged()
+
     fun setViewTitle(title: String)
 
     fun popView(depth: Int = 1)
@@ -33,6 +35,8 @@ interface MainView : BaseView {
     interface MainChildView {
 
         fun onFragmentReselected()
+
+        fun onFragmentChanged() {}
     }
 
     interface TitledView {

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

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="#FFFFFF"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M9,16.2L4.8,12l-1.4,1.4L9,19 21,7l-1.4,-1.4L9,16.2z" />
+</vector>

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

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="#FFFFFF"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M18,7l-1.41,-1.41 -6.34,6.34 1.41,1.41L18,7zM22.24,5.59L11.66,16.17 7.48,12l-1.41,1.41L11.66,19l12,-12 -1.42,-1.41zM0.41,13.41L6,19l1.41,-1.41L1.83,12 0.41,13.41z" />
+</vector>

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

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="#FFFFFF"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M7,11v2h10v-2L7,11zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8z" />
+</vector>

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

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="#FFFFFF"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8zM12.5,7H11v6l5.25,3.15 0.75,-1.23 -4.5,-2.67z" />
+</vector>

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

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="20dp">
+
+    <com.google.android.material.textfield.TextInputLayout
+        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:id="@+id/excuseReason"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/attendance_excuse_dialog_reason" />
+
+        <requestFocus />
+    </com.google.android.material.textfield.TextInputLayout>
+</LinearLayout>

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

@@ -40,16 +40,16 @@
                 <TextView
                     android:id="@+id/gradeDialogColorAndWeightValue"
                     android:layout_width="match_parent"
-                    android:layout_marginTop="2dp"
-                    android:minHeight="32dp"
                     android:layout_height="wrap_content"
                     android:layout_gravity="end"
+                    android:layout_marginTop="2dp"
                     android:background="@color/grade_black"
                     android:gravity="center"
-                    android:textColor="@android:color/white"
-                    android:textSize="14sp"
-                    android:textIsSelectable="true"
                     android:maxLines="2"
+                    android:minHeight="32dp"
+                    android:textColor="@android:color/white"
+                    android:textIsSelectable="true"
+                    android:textSize="14sp"
                     tools:text="Waga: 1.00" />
             </LinearLayout>
 
@@ -57,16 +57,17 @@
                 android:id="@+id/gradeDialogHeader"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:minHeight="120dp"
+                android:layout_marginEnd="12dp"
-                android:gravity="center_vertical"
+                android:layout_marginRight="12dp"
-                android:layout_toLeftOf="@+id/gradeDialogValueLayout"
                 android:layout_toStartOf="@+id/gradeDialogValueLayout"
+                android:layout_toLeftOf="@+id/gradeDialogValueLayout"
                 android:layout_alignParentStart="true"
                 android:layout_alignParentLeft="true"
                 android:layout_alignParentTop="true"
-                android:layout_marginRight="12dp"
+                android:gravity="center_vertical"
-                android:layout_marginEnd="12dp"
+                android:minHeight="120dp"
                 android:orientation="vertical">
+
                 <TextView
                     android:id="@+id/gradeDialogSubject"
                     android:layout_width="wrap_content"

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

@@ -56,6 +56,20 @@
                 android:textSize="20sp" />
         </LinearLayout>
 
+        <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
+            android:id="@+id/attendanceExcuseButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom|end"
+            android:layout_margin="16dp"
+            android:clickable="true"
+            android:focusable="true"
+            android:tint="?colorOnSecondary"
+            android:visibility="gone"
+            android:text="@string/attendance_excuse_title"
+            app:icon="@drawable/ic_all_done_all"
+            tools:visibility="visible" />
+
         <LinearLayout
             android:id="@+id/attendanceError"
             android:layout_width="match_parent"

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

@@ -1,5 +1,4 @@
 <RelativeLayout 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"
     android:id="@+id/gradeHeaderContainer"
     android:layout_width="match_parent"
@@ -53,15 +52,15 @@
     <TextView
         android:id="@+id/gradeHeaderNote"
         android:layout_width="wrap_content"
-        android:minWidth="20dp"
         android:layout_height="20dp"
-        android:paddingLeft="5dp"
+        android:background="@drawable/background_header_note"
-        android:paddingRight="5dp"
+        android:gravity="center"
+        android:minWidth="20dp"
         android:layout_alignParentEnd="true"
         android:layout_alignParentRight="true"
-        android:gravity="center"
+        android:paddingLeft="5dp"
         android:layout_marginTop="10dp"
-        android:background="@drawable/background_header_note"
+        android:paddingRight="5dp"
         android:textColor="?colorOnPrimary"
         android:textSize="14sp"
         tools:text="255" />

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

@@ -13,17 +13,41 @@
     android:paddingBottom="7dp"
     tools:context=".ui.modules.attendance.AttendanceItem">
 
-    <TextView
+    <LinearLayout
-        android:id="@+id/attendanceItemNumber"
+        android:id="@+id/attendanceItemNumberContainer"
         android:layout_width="40dp"
         android:layout_height="40dp"
-        android:layout_centerVertical="true"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/attendanceItemNumber"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
             android:gravity="center"
             android:includeFontPadding="false"
             android:maxLength="2"
             android:textSize="32sp"
+            android:visibility="gone"
+            tools:visibility="visible"
             tools:text="5" />
 
+        <com.google.android.material.checkbox.MaterialCheckBox
+            android:id="@+id/attendanceItemExcuseCheckbox"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:text="@null"
+            android:visibility="gone" />
+
+        <ImageView
+            android:id="@+id/attendanceItemExcuseInfo"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:visibility="gone"
+            app:srcCompat="@drawable/ic_excuse_waiting"
+            app:tint="?attr/colorOnSurface" />
+    </LinearLayout>
+
     <TextView
         android:id="@+id/attendanceItemSubject"
         android:layout_width="wrap_content"
@@ -35,8 +59,8 @@
         android:layout_marginRight="40dp"
         android:layout_toStartOf="@id/attendanceItemAlert"
         android:layout_toLeftOf="@id/attendanceItemAlert"
-        android:layout_toEndOf="@+id/attendanceItemNumber"
+        android:layout_toEndOf="@+id/attendanceItemNumberContainer"
-        android:layout_toRightOf="@+id/attendanceItemNumber"
+        android:layout_toRightOf="@+id/attendanceItemNumberContainer"
         android:ellipsize="end"
         android:maxLines="1"
         android:textSize="17sp"
@@ -48,7 +72,7 @@
         android:layout_height="wrap_content"
         android:layout_alignStart="@id/attendanceItemSubject"
         android:layout_alignLeft="@id/attendanceItemSubject"
-        android:layout_alignBottom="@+id/attendanceItemNumber"
+        android:layout_alignBottom="@+id/attendanceItemNumberContainer"
         android:maxLines="1"
         android:textColor="?android:textColorSecondary"
         android:textSize="12sp"

app/src/main/res/menu/context_menu_excuse.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/excuseMenuSubmit"
+        android:icon="@drawable/ic_all_done"
+        android:title="@string/attendance_excuse_dialog_submit"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
+        app:showAsAction="always" />
+</menu>

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

@@ -141,6 +141,11 @@
         <item quantity="many">%1$d nieobecności</item>
         <item quantity="other">%1$d nieobecności</item>
     </plurals>
+    <string name="attendance_excuse_dialog_reason">Powód nieobecności (opcjonalny)</string>
+    <string name="attendance_excuse_dialog_submit">Wyślij</string>
+    <string name="attendance_excuse_success">Usprawiedliwiono pomyślnie!</string>
+    <string name="attendance_excuse_no_selection">Musisz wybrać co najmniej jedną nieobecność!</string>
+    <string name="attendance_excuse_title">Usprawiedliw</string>
 
 
     <!--Attendance summary-->

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

@@ -135,6 +135,11 @@
         <item quantity="one">%1$d absence</item>
         <item quantity="other">%1$d absences</item>
     </plurals>
+    <string name="attendance_excuse_dialog_reason">Absence reason (optional)</string>
+    <string name="attendance_excuse_dialog_submit">Send</string>
+    <string name="attendance_excuse_success">Absence excused successfully!</string>
+    <string name="attendance_excuse_no_selection">You must select at least one absence!</string>
+    <string name="attendance_excuse_title">Excuse</string>
 
 
     <!--Attendance summary-->

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

@@ -16,6 +16,7 @@
     <style name="WulkanowyTheme.NoActionBar" parent="WulkanowyTheme">
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
+        <item name="windowActionModeOverlay">true</item>
     </style>
 
     <style name="WulkanowyTheme.SplashScreen" parent="WulkanowyTheme.NoActionBar">