Clearing stats

app/src/main/kotlin/org/koitharu/kotatsu/stats/data/StatsDao.kt

@@ -32,6 +32,9 @@ interface StatsDao {
 	@Query("SELECT manga_id, SUM(duration) AS d FROM stats GROUP BY manga_id ORDER BY d DESC")
 	suspend fun getDurationStats(): Map<@MapColumn("manga_id") Long, @MapColumn("d") Long>
 
+	@Query("DELETE FROM stats")
+	suspend fun clear()
+
 	@Upsert
 	suspend fun upsert(entity: StatsEntity)
 }

app/src/main/kotlin/org/koitharu/kotatsu/stats/data/StatsRepository.kt

@@ -44,4 +44,8 @@ class StatsRepository @Inject constructor(
 		}
 		time
 	}
+
+	suspend fun clearStats() {
+		db.getStatsDao().clear()
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/stats/ui/StatsActivity.kt

@@ -1,19 +1,28 @@
 package org.koitharu.kotatsu.stats.ui
 
 import android.os.Bundle
+import android.view.Gravity
 import android.view.LayoutInflater
+import android.view.Menu
+import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Toast
 import androidx.activity.viewModels
 import androidx.core.graphics.Insets
 import androidx.fragment.app.viewModels
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.BaseActivity
 import org.koitharu.kotatsu.core.ui.BaseFragment
 import org.koitharu.kotatsu.core.ui.BaseListAdapter
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
+import org.koitharu.kotatsu.core.ui.util.ReversibleActionObserver
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
 import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.core.util.ext.showOrHide
 import org.koitharu.kotatsu.databinding.ActivityStatsBinding
 import org.koitharu.kotatsu.details.ui.DetailsActivity
 import org.koitharu.kotatsu.list.ui.adapter.ListItemType
@@ -22,7 +31,8 @@ import org.koitharu.kotatsu.stats.domain.StatsRecord
 import org.koitharu.kotatsu.stats.ui.views.PieChartView
 
 @AndroidEntryPoint
-class StatsActivity : BaseActivity<ActivityStatsBinding>(), OnListItemClickListener<Manga> {
+class StatsActivity : BaseActivity<ActivityStatsBinding>(), OnListItemClickListener<Manga>,
+	PieChartView.OnSegmentClickListener {
 
 	private val viewModel: StatsViewModel by viewModels()
 
@@ -33,6 +43,11 @@ class StatsActivity : BaseActivity<ActivityStatsBinding>(), OnListItemClickListe
 		val adapter = BaseListAdapter<StatsRecord>()
 			.addDelegate(ListItemType.FEED, statsAD(this))
 		viewBinding.recyclerView.adapter = adapter
+		viewBinding.chart.onSegmentClickListener = this
+		viewModel.isLoading.observe(this) {
+			viewBinding.progressBar.showOrHide(it)
+		}
+		viewModel.onActionDone.observeEvent(this, ReversibleActionObserver(viewBinding.recyclerView))
 		viewModel.readingStats.observe(this) {
 			val sum = it.sumOf { it.duration }
 			viewBinding.chart.setData(
@@ -54,4 +69,37 @@ class StatsActivity : BaseActivity<ActivityStatsBinding>(), OnListItemClickListe
 	override fun onItemClick(item: Manga, view: View) {
 		startActivity(DetailsActivity.newIntent(view.context, item))
 	}
+
+	override fun onSegmentClick(view: PieChartView, segment: PieChartView.Segment) {
+		Toast.makeText(this, segment.label, Toast.LENGTH_SHORT).apply {
+			setGravity(Gravity.TOP, 0, view.top + view.height / 2)
+		}.show()
+	}
+
+	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+		menuInflater.inflate(R.menu.opt_stats, menu)
+		return super.onCreateOptionsMenu(menu)
+	}
+
+	override fun onOptionsItemSelected(item: MenuItem): Boolean {
+		return when (item.itemId) {
+			R.id.action_clear -> {
+				showClearConfirmDialog()
+				true
+			}
+
+			else -> super.onOptionsItemSelected(item)
+		}
+	}
+
+	private fun showClearConfirmDialog() {
+		MaterialAlertDialogBuilder(this, DIALOG_THEME_CENTERED)
+			.setMessage(R.string.clear_stats_confirm)
+			.setTitle(R.string.clear_stats)
+			.setIcon(R.drawable.ic_delete)
+			.setNegativeButton(android.R.string.cancel, null)
+			.setPositiveButton(R.string.clear) { _, _ ->
+				viewModel.clear()
+			}.show()
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/stats/ui/StatsViewModel.kt

@@ -3,12 +3,18 @@ package org.koitharu.kotatsu.stats.ui
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.plus
+import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.BaseViewModel
+import org.koitharu.kotatsu.core.ui.util.ReversibleAction
+import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
+import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.stats.data.StatsRepository
+import org.koitharu.kotatsu.stats.domain.StatsRecord
 import javax.inject.Inject
 
 @HiltViewModel
@@ -16,7 +22,20 @@ class StatsViewModel @Inject constructor(
 	private val repository: StatsRepository,
 ) : BaseViewModel() {
 
-	val readingStats = flow {
-		emit(repository.getReadingStats())
-	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Lazily, emptyList())
+	val onActionDone = MutableEventFlow<ReversibleAction>()
+	val readingStats = MutableStateFlow<List<StatsRecord>>(emptyList())
+
+	init {
+		launchLoadingJob(Dispatchers.Default) {
+			readingStats.value = repository.getReadingStats()
+		}
+	}
+
+	fun clear() {
+		launchLoadingJob(Dispatchers.Default) {
+			repository.clearStats()
+			readingStats.value = emptyList()
+			onActionDone.call(ReversibleAction(R.string.stats_cleared, null))
+		}
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/stats/ui/views/PieChartView.kt

@@ -98,6 +98,9 @@ class PieChartView @JvmOverloads constructor(
 	}
 
 	override fun onDown(e: MotionEvent): Boolean {
+		if (onSegmentClickListener == null) {
+			return false
+		}
 		val segment = findSegmentIndex(e.x, e.y)
 		if (segment != hightlightedSegment) {
 			hightlightedSegment = segment