[Timetable] Implement lazy day loading. Introduce TimetableManager class.

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

@@ -47,6 +47,7 @@ import pl.szczodrzynski.edziennik.ui.modules.base.CrashActivity
 import pl.szczodrzynski.edziennik.utils.*
 import pl.szczodrzynski.edziennik.utils.managers.GradesManager
 import pl.szczodrzynski.edziennik.utils.managers.NotificationChannelsManager
+import pl.szczodrzynski.edziennik.utils.managers.TimetableManager
 import pl.szczodrzynski.edziennik.utils.managers.UserActionManager
 import java.util.concurrent.TimeUnit
 import kotlin.coroutines.CoroutineContext
@@ -67,6 +68,7 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
     val notificationChannelsManager by lazy { NotificationChannelsManager(this) }
     val userActionManager by lazy { UserActionManager(this) }
     val gradesManager by lazy { GradesManager(this) }
+    val timetableManager by lazy { TimetableManager(this) }
 
     val db
         get() = App.db

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

@@ -5,10 +5,9 @@
 package pl.szczodrzynski.edziennik.data.db.dao
 
 import androidx.lifecycle.LiveData
-import androidx.room.Dao
+import androidx.room.*
-import androidx.room.Insert
+import androidx.sqlite.db.SimpleSQLiteQuery
-import androidx.room.OnConflictStrategy
+import androidx.sqlite.db.SupportSQLiteQuery
-import androidx.room.Query
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson
 import pl.szczodrzynski.edziennik.data.db.entity.Metadata
 import pl.szczodrzynski.edziennik.data.db.full.LessonFull
@@ -53,6 +52,9 @@ interface TimetableDao {
     @Query("DELETE FROM timetable WHERE profileId = :profileId AND type != -1 AND ((type != 3 AND date >= :dateFrom AND date <= :dateTo) OR ((type = 3 OR type = 1) AND oldDate >= :dateFrom AND oldDate <= :dateTo))")
     fun clearBetweenDates(profileId: Int, dateFrom: Date, dateTo: Date)
 
+    @RawQuery(observedEntities = [Lesson::class])
+    fun getRaw(query: SupportSQLiteQuery): LiveData<List<LessonFull>>
+
     @Query("""
         $QUERY
         WHERE timetable.profileId = :profileId AND type != -1 AND type != 0
@@ -67,12 +69,11 @@ interface TimetableDao {
     """)
     fun getChangesForDateNow(profileId: Int, date: Date): List<LessonFull>
 
-    @Query("""
+    fun getForDate(profileId: Int, date: Date) = getRaw(SimpleSQLiteQuery("""
         $QUERY
-        WHERE timetable.profileId = :profileId AND ((type != 3 AND date = :date) OR ((type = 3 OR type = 1) AND oldDate = :date))
+        WHERE timetable.profileId = $profileId AND ((type != 3 AND date = "${date.stringY_m_d}") OR ((type = 3 OR type = 1) AND oldDate = "${date.stringY_m_d}"))
         ORDER BY id, type
-    """)
+    """))
-    fun getForDate(profileId: Int, date: Date): LiveData<List<LessonFull>>
 
     @Query("""
         $QUERY

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

@@ -5,6 +5,7 @@
 package pl.szczodrzynski.edziennik.data.db.entity
 
 import androidx.room.Entity
+import androidx.room.Ignore
 import androidx.room.Index
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Time
@@ -66,6 +67,9 @@ open class Lesson(val profileId: Int, var id: Long) {
 
     fun buildId(): Long = (displayDate?.combineWith(displayStartTime) ?: 0L) / 6L * 10L + (hashCode() and 0xFFFF)
 
+    @Ignore
+    var showAsUnseen = false
+
     override fun toString(): String {
         return "Lesson(profileId=$profileId, " +
                 "id=$id, " +

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

@@ -25,7 +25,6 @@ import pl.szczodrzynski.edziennik.ui.dialogs.event.EventDetailsDialog
 import pl.szczodrzynski.edziennik.ui.dialogs.event.EventListAdapter
 import pl.szczodrzynski.edziennik.ui.dialogs.event.EventManualDialog
 import pl.szczodrzynski.edziennik.ui.modules.timetable.TimetableFragment
-import pl.szczodrzynski.edziennik.ui.modules.timetable.TimetableUtils
 import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Week
@@ -50,7 +49,7 @@ class LessonDetailsDialog(
         get() = job + Dispatchers.Main
 
     private lateinit var adapter: EventListAdapter
-    private val utils by lazy { TimetableUtils() }
+    private val manager by lazy { app.timetableManager }
 
     init { run {
         if (activity.isFinishing)
@@ -91,7 +90,7 @@ class LessonDetailsDialog(
         val lessonTime = lesson.displayStartTime ?: return
         b.lessonDate.text = Week.getFullDayName(lessonDate.weekDay) + ", " + lessonDate.formattedString
 
-        b.annotationVisible = utils.getAnnotation(activity, lesson, b.annotation)
+        b.annotationVisible = manager.getAnnotation(activity, lesson, b.annotation)
 
         if (lesson.type >= Lesson.TYPE_SHIFTED_SOURCE) {
             b.shiftedLayout.visibility = View.VISIBLE

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

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-2-22.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.base
+
+import androidx.fragment.app.Fragment
+
+abstract class PagerFragment : Fragment() {
+    private var isPageCreated = false
+
+    /**
+     * Called when the page is first shown, or if previous
+     * [onPageCreated] returned false
+     *
+     * @return true if the view is set up
+     * @return false if the setup failed. The method may be then called
+     * again, when page becomes visible.
+     */
+    abstract fun onPageCreated(): Boolean
+
+    override fun onResume() {
+        if (!isPageCreated) {
+            isPageCreated = onPageCreated()
+        }
+        super.onResume()
+    }
+}

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

@@ -5,15 +5,15 @@
 package pl.szczodrzynski.edziennik.ui.modules.timetable
 
 import android.os.Bundle
-import android.util.Log
+import android.view.Gravity
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.FrameLayout
+import android.widget.ProgressBar
 import android.widget.TextView
 import androidx.asynclayoutinflater.view.AsyncLayoutInflater
 import androidx.core.view.setPadding
-import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import com.linkedin.android.tachyon.DayView
 import com.linkedin.android.tachyon.DayViewConfig
@@ -27,6 +27,7 @@ import pl.szczodrzynski.edziennik.data.db.full.LessonFull
 import pl.szczodrzynski.edziennik.databinding.TimetableLessonBinding
 import pl.szczodrzynski.edziennik.databinding.TimetableNoTimetableBinding
 import pl.szczodrzynski.edziennik.ui.dialogs.timetable.LessonDetailsDialog
+import pl.szczodrzynski.edziennik.ui.modules.base.PagerFragment
 import pl.szczodrzynski.edziennik.ui.modules.timetable.TimetableFragment.Companion.DEFAULT_END_HOUR
 import pl.szczodrzynski.edziennik.ui.modules.timetable.TimetableFragment.Companion.DEFAULT_START_HOUR
 import pl.szczodrzynski.edziennik.utils.ListenerScrollView
@@ -35,7 +36,7 @@ import java.util.*
 import kotlin.coroutines.CoroutineContext
 import kotlin.math.min
 
-class TimetableDayFragment : Fragment(), CoroutineScope {
+class TimetableDayFragment : PagerFragment(), CoroutineScope {
     companion object {
         private const val TAG = "TimetableDayFragment"
     }
@@ -44,7 +45,7 @@ class TimetableDayFragment : Fragment(), CoroutineScope {
     private lateinit var activity: MainActivity
     private lateinit var inflater: AsyncLayoutInflater
 
-    private lateinit var job: Job
+    private val job: Job = Job()
     override val coroutineContext: CoroutineContext
         get() = job + Dispatchers.Main
 
@@ -53,7 +54,7 @@ class TimetableDayFragment : Fragment(), CoroutineScope {
     private var endHour = DEFAULT_END_HOUR
     private var firstEventMinute = 24 * 60
 
-    private val utils by lazy { TimetableUtils() }
+    private val manager by lazy { app.timetableManager }
 
     // find SwipeRefreshLayout in the hierarchy
     private val refreshLayout by lazy { view?.findParentById(R.id.refreshLayout) }
@@ -88,25 +89,23 @@ class TimetableDayFragment : Fragment(), CoroutineScope {
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         activity = (getActivity() as MainActivity?) ?: return null
-        if (context == null)
+        context ?: return null
-            return null
         app = activity.application as App
-        job = Job()
         this.inflater = AsyncLayoutInflater(context!!)
         date = arguments?.getInt("date")?.let { Date.fromValue(it) } ?: Date.getToday()
         startHour = arguments?.getInt("startHour") ?: DEFAULT_START_HOUR
         endHour = arguments?.getInt("endHour") ?: DEFAULT_END_HOUR
         return FrameLayout(activity).apply {
             layoutParams = FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
+            addView(ProgressBar(activity).apply {
+                layoutParams = FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER)
+            })
         }
     }
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    override fun onPageCreated(): Boolean {
-        // TODO check if app, activity, b can be null
+        if (!isAdded)
-        if (app.profile == null || !isAdded)
+            return false
-            return
-
-        Log.d(TAG, "onViewCreated, date=$date")
 
         // observe lesson database
         app.db.timetableDao().getForDate(App.profileId, date).observe(this, Observer { lessons ->
@@ -117,6 +116,8 @@ class TimetableDayFragment : Fragment(), CoroutineScope {
                 processLessonList(lessons, events)
             }
         })
+
+        return true
     }
 
     private fun processLessonList(lessons: List<LessonFull>, events: List<EventFull>) {
@@ -174,6 +175,8 @@ class TimetableDayFragment : Fragment(), CoroutineScope {
         }
         dayView.setHourLabelViews(hourLabelViews)
 
+        lessons.forEach { it.showAsUnseen = !it.seen }
+
         buildLessonViews(lessons.filter { it.type != Lesson.TYPE_NO_LESSONS }, events)
     }
 
@@ -209,7 +212,6 @@ class TimetableDayFragment : Fragment(), CoroutineScope {
             eventView.tag = lesson
 
             eventView.setOnClickListener {
-                Log.d(TAG, "Clicked ${it.tag}")
                 if (isAdded && it.tag is LessonFull)
                     LessonDetailsDialog(activity, it.tag as LessonFull)
             }
@@ -275,10 +277,13 @@ class TimetableDayFragment : Fragment(), CoroutineScope {
             lb.detailsFirst.text = listOfNotEmpty(timeRange, classroomInfo).concat(bullet)
             lb.detailsSecond.text = listOfNotEmpty(teacherInfo, teamInfo).concat(bullet)
 
-            lb.unread = lesson.type != Lesson.TYPE_NORMAL && !lesson.seen
+            lb.unread = lesson.type != Lesson.TYPE_NORMAL && lesson.showAsUnseen
+            if (!lesson.seen) {
+                manager.markAsSeen(lesson)
+            }
 
             //lb.subjectName.typeface = Typeface.create("sans-serif-light", Typeface.BOLD)
-            lb.annotationVisible = utils.getAnnotation(activity, lesson, lb.annotation)
+            lb.annotationVisible = manager.getAnnotation(activity, lesson, lb.annotation)
 
             // The day view needs the event time ranges in the start minute/end minute format,
             // so calculate those here

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

@@ -15,7 +15,6 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import androidx.fragment.app.Fragment
-import androidx.lifecycle.Observer
 import androidx.viewpager.widget.ViewPager
 import com.google.android.material.datepicker.MaterialDatePicker
 import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
@@ -26,12 +25,9 @@ import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.MainActivity
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.db.entity.Metadata
-import pl.szczodrzynski.edziennik.data.db.entity.Lesson
 import pl.szczodrzynski.edziennik.databinding.FragmentTimetableV2Binding
-import pl.szczodrzynski.edziennik.observeOnce
 import pl.szczodrzynski.edziennik.ui.dialogs.event.EventManualDialog
 import pl.szczodrzynski.edziennik.ui.dialogs.timetable.GenerateBlockTimetableDialog
-import pl.szczodrzynski.edziennik.utils.Themes
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.navlib.bottomsheet.items.BottomSheetPrimaryItem
 import pl.szczodrzynski.navlib.bottomsheet.items.BottomSheetSeparatorItem
@@ -50,7 +46,7 @@ class TimetableFragment : Fragment(), CoroutineScope {
     private lateinit var activity: MainActivity
     private lateinit var b: FragmentTimetableV2Binding
 
-    private lateinit var job: Job
+    private val job: Job = Job()
     override val coroutineContext: CoroutineContext
         get() = job + Dispatchers.Main
 
@@ -61,11 +57,6 @@ class TimetableFragment : Fragment(), CoroutineScope {
         activity = (getActivity() as MainActivity?) ?: return null
         context ?: return null
         app = activity.application as App
-        job = Job()
-        context!!.theme.applyStyle(Themes.appTheme, true)
-        if (app.profile == null)
-            return inflater.inflate(R.layout.fragment_loading, container, false)
-        // activity, context and profile is valid
         b = FragmentTimetableV2Binding.inflate(inflater)
         // TODO: 2020-01-05 resolve issues with page scrolling (and scrolling up) with viewpager and swipe to refresh
         //b.refreshLayout.setParent(activity.swipeRefreshLayout)
@@ -91,8 +82,7 @@ class TimetableFragment : Fragment(), CoroutineScope {
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) { launch {
-        // TODO check if app, activity, b can be null
+        if (!isAdded)
-        if (app.profile == null || !isAdded)
             return@launch
 
         if (app.profile.getStudentData("timetableNotPublic", false)) {
@@ -141,7 +131,7 @@ class TimetableFragment : Fragment(), CoroutineScope {
                 startHour,
                 endHour
         )
-        b.viewPager.offscreenPageLimit = 2
+        b.viewPager.offscreenPageLimit = 1
         b.viewPager.adapter = pagerAdapter
         b.viewPager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener {
             override fun onPageScrollStateChanged(state: Int) {
@@ -162,7 +152,7 @@ class TimetableFragment : Fragment(), CoroutineScope {
                     activity.gainAttentionFAB()
                     fabShown = true
                 }
-                markLessonsAsSeen()
+                //markLessonsAsSeen()
             }
         })
 
@@ -224,7 +214,7 @@ class TimetableFragment : Fragment(), CoroutineScope {
         })
     }}
 
-    private fun markLessonsAsSeen() = pageSelection?.let { date ->
+    /*private fun markLessonsAsSeen() = pageSelection?.let { date ->
         app.db.timetableDao().getForDate(App.profileId, date).observeOnce(this@TimetableFragment, Observer { lessons ->
             lessons.forEach { lesson ->
                 if (lesson.type != Lesson.TYPE_NORMAL && lesson.type != Lesson.TYPE_NO_LESSONS
@@ -233,5 +223,5 @@ class TimetableFragment : Fragment(), CoroutineScope {
                 }
             }
         })
-    }
+    }*/
 }

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

@@ -33,11 +33,6 @@ class TimetablePagerAdapter(
                 putInt("endHour", endHour)
             }
         }
-        /*return TimetableDayFragment().apply {
-            arguments = Bundle().also {
-                it.putLong("date", items[position].value.toLong())
-            }
-        }*/
     }
 
     override fun getCount(): Int {

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

@@ -1,22 +1,35 @@
 /*
- * Copyright (c) Kuba Szczodrzyński 2020-2-16.
+ * Copyright (c) Kuba Szczodrzyński 2020-3-10.
  */
 
-package pl.szczodrzynski.edziennik.ui.modules.timetable
+package pl.szczodrzynski.edziennik.utils.managers
 
 import android.content.Context
 import android.graphics.PorterDuff
 import android.graphics.PorterDuffColorFilter
 import android.widget.TextView
-import pl.szczodrzynski.edziennik.R
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson
 import pl.szczodrzynski.edziennik.data.db.full.LessonFull
-import pl.szczodrzynski.edziennik.resolveAttr
-import pl.szczodrzynski.edziennik.setText
-import pl.szczodrzynski.edziennik.setTintColor
 import pl.szczodrzynski.navlib.getColorFromAttr
+import kotlin.coroutines.CoroutineContext
+
+class TimetableManager(val app: App) : CoroutineScope {
+
+    private val job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Default
+
+    fun markAsSeen(lesson: LessonFull) {
+        lesson.seen = true
+        startCoroutineTimer(500L, 0L) {
+            app.db.metadataDao().setSeen(lesson.profileId, lesson, true)
+        }
+    }
 
-class TimetableUtils {
     fun getAnnotation(context: Context, lesson: LessonFull, annotation: TextView): Boolean {
         var annotationVisible = false
         when (lesson.type) {

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

@@ -74,8 +74,8 @@
                     tools:text="pracownia urządzeń techniki komputerowej" />
 
                 <View
-                    android:layout_width="8dp"
+                    android:layout_width="12dp"
-                    android:layout_height="8dp"
+                    android:layout_height="12dp"
                     android:layout_gravity="center_vertical"
                     android:layout_marginStart="8dp"
                     android:layout_marginLeft="8dp"