Improve the widget

app/src/main/AndroidManifest.xml

@@ -112,6 +112,14 @@
             android:taskAffinity=":update"
             android:launchMode="singleTop" />
 
+        <activity
+            android:name=".ui.widget.config.WidgetConfigActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
+            </intent-filter>
+        </activity>
+
         <!-- system integration -->
 
         <receiver android:name=".integration.platform.android.receiver.BootReceiver" android:exported="false">

app/src/main/java/io/timelimit/android/data/Database.kt

@@ -46,6 +46,7 @@ interface Database {
     fun cryptContainerKeyResult(): CryptContainerKeyResultDao
     fun deviceKey(): DeviceKeyDao
     fun u2f(): U2FDao
+    fun widgetCategory(): WidgetCategoryDao
 
     fun <T> runInTransaction(block: () -> T): T
     fun <T> runInUnobservedTransaction(block: () -> T): T

app/src/main/java/io/timelimit/android/data/Migrations.kt

@@ -326,6 +326,13 @@ object DatabaseMigrations {
         }
     }
 
+    val MIGRATE_TO_V45 = object: Migration(44, 45) {
+        override fun migrate(database: SupportSQLiteDatabase) {
+            database.execSQL("CREATE TABLE IF NOT EXISTS `widget_category` (`widget_id` INTEGER NOT NULL, `category_id` TEXT NOT NULL, PRIMARY KEY(`widget_id`, `category_id`), FOREIGN KEY(`category_id`) REFERENCES `category`(`id`) ON UPDATE CASCADE ON DELETE CASCADE )")
+            database.execSQL("CREATE INDEX IF NOT EXISTS `index_widget_category_category_id` ON `widget_category` (`category_id`)")
+        }
+    }
+
     val ALL = arrayOf(
         MIGRATE_TO_V2,
         MIGRATE_TO_V3,
@@ -369,6 +376,7 @@ object DatabaseMigrations {
         MIGRATE_TO_V41,
         MIGRATE_TO_V42,
         MIGRATE_TP_V43,
-        MIGRATE_TO_V44
+        MIGRATE_TO_V44,
+        MIGRATE_TO_V45
     )
 }

app/src/main/java/io/timelimit/android/data/RoomDatabase.kt

@@ -58,8 +58,9 @@ import java.util.concurrent.TimeUnit
     CryptContainerPendingKeyRequest::class,
     CryptContainerKeyResult::class,
     DevicePublicKey::class,
-    UserU2FKey::class
-], version = 44)
+    UserU2FKey::class,
+    WidgetCategory::class
+], version = 45)
 abstract class RoomDatabase: RoomDatabase(), io.timelimit.android.data.Database {
     companion object {
         private val lock = Object()

app/src/main/java/io/timelimit/android/data/dao/WidgetCategoryDao.kt

@@ -0,0 +1,47 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.data.dao
+
+import androidx.lifecycle.LiveData
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import io.timelimit.android.data.model.WidgetCategory
+
+@Dao
+interface WidgetCategoryDao {
+    @Query("DELETE FROM widget_category WHERE widget_id = :widgetId")
+    fun deleteByWidgetId(widgetId: Int)
+
+    @Query("DELETE FROM widget_category WHERE widget_id IN (:widgetIds)")
+    fun deleteByWidgetIds(widgetIds: IntArray)
+
+    @Query("DELETE FROM widget_category WHERE widget_id = :widgetId AND category_id IN (:categoryIds)")
+    fun deleteByWidgetIdAndCategoryIds(widgetId: Int, categoryIds: List<String>)
+
+    @Query("DELETE FROM widget_category")
+    fun deleteAll()
+
+    @Query("SELECT * FROM widget_category")
+    fun queryLive(): LiveData<List<WidgetCategory>>
+
+    @Query("SELECT category_id FROM widget_category WHERE widget_id = :widgetId")
+    fun queryByWidgetIdSync(widgetId: Int): List<String>
+
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
+    fun insert(items: List<WidgetCategory>)
+}

app/src/main/java/io/timelimit/android/data/model/WidgetCategory.kt

@@ -0,0 +1,40 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.data.model
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.ForeignKey
+
+@Entity(
+    tableName = "widget_category",
+    primaryKeys = ["widget_id", "category_id"],
+    foreignKeys = [
+        ForeignKey(
+            entity = Category::class,
+            parentColumns = ["id"],
+            childColumns = ["category_id"],
+            onUpdate = ForeignKey.CASCADE,
+            onDelete = ForeignKey.CASCADE
+        )
+    ]
+)
+data class WidgetCategory (
+    @ColumnInfo(name = "widget_id")
+    val widgetId: Int,
+    @ColumnInfo(name = "category_id", index = true)
+    val categoryId: String
+)

app/src/main/java/io/timelimit/android/integration/platform/android/BackgroundActionService.kt

@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -44,8 +44,13 @@ class BackgroundActionService: Service() {
         fun prepareRevokeTemporarilyAllowed(context: Context) = Intent(context, BackgroundActionService::class.java)
                 .putExtra(ACTION, ACTION_REVOKE_TEMPORARILY_ALLOWED_APPS)
 
-        fun prepareSwitchToDefaultUser(context: Context) = Intent(context, BackgroundActionService::class.java)
-                .putExtra(ACTION, ACTION_SWITCH_TO_DEFAULT_USER)
+        fun getSwitchToDefaultUserIntent(context: Context) = PendingIntent.getService(
+            context,
+            PendingIntentIds.SWITCH_TO_DEFAULT_USER,
+            Intent(context, BackgroundActionService::class.java)
+                .putExtra(ACTION, ACTION_SWITCH_TO_DEFAULT_USER),
+            PendingIntentIds.PENDING_INTENT_FLAGS
+        )
 
         fun prepareDismissNotification(context: Context, type: Int, id: String) = Intent(context, BackgroundActionService::class.java)
                 .putExtra(ACTION, ACTION_DISMISS_NOTIFICATION)

app/src/main/java/io/timelimit/android/integration/platform/android/BackgroundService.kt

@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,7 +17,6 @@ package io.timelimit.android.integration.platform.android
 
 import android.app.ActivityManager
 import android.app.NotificationManager
-import android.app.PendingIntent
 import android.app.Service
 import android.content.Context
 import android.content.Intent
@@ -89,12 +88,7 @@ class BackgroundService: Service() {
                                 NotificationCompat.Action.Builder(
                                         R.drawable.ic_account_circle_black_24dp,
                                         context.getString(R.string.manage_device_default_user_switch_btn),
-                                        PendingIntent.getService(
-                                                context,
-                                                PendingIntentIds.SWITCH_TO_DEFAULT_USER,
-                                                BackgroundActionService.prepareSwitchToDefaultUser(context),
-                                                PendingIntentIds.PENDING_INTENT_FLAGS
-                                        )
+                                        BackgroundActionService.getSwitchToDefaultUserIntent(context)
                                 ).build()
                         )
                     }

app/src/main/java/io/timelimit/android/logic/AppLogic.kt

@@ -30,6 +30,7 @@ import io.timelimit.android.sync.SyncUtil
 import io.timelimit.android.sync.network.api.ServerApi
 import io.timelimit.android.sync.websocket.NetworkStatusInterface
 import io.timelimit.android.sync.websocket.WebsocketClientCreator
+import io.timelimit.android.ui.widget.TimesWidgetProvider
 
 class AppLogic(
         val platformIntegration: PlatformIntegration,
@@ -98,6 +99,7 @@ class AppLogic(
 
     init {
         WatchdogLogic(this)
+        TimesWidgetProvider.triggerUpdates(context)
     }
 
     val suspendAppsLogic = SuspendAppsLogic(this)

app/src/main/java/io/timelimit/android/ui/widget/TimesWidgetConfig.kt

@@ -0,0 +1,24 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget
+
+import io.timelimit.android.data.model.WidgetCategory
+
+data class TimesWidgetConfig (val categories: List<WidgetCategory>) {
+    val widgetCategoriesByWidgetId by lazy {
+        categories.groupBy { it.widgetId }.mapValues { it.value.map { it.categoryId }.toSet() }
+    }
+}

app/src/main/java/io/timelimit/android/ui/widget/TimesWidgetContent.kt

@@ -0,0 +1,32 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget
+
+sealed class TimesWidgetContent {
+        object UnconfiguredDevice: TimesWidgetContent()
+        data class NoChildUser(val canSwitchToDefaultUser: Boolean): TimesWidgetContent()
+        data class Categories(
+                val categories: List<Item>,
+                val canSwitchToDefaultUser: Boolean
+        ): TimesWidgetContent() {
+                data class Item(
+                        val categoryId: String,
+                        val categoryName: String,
+                        val level: Int,
+                        val remainingTimeToday: Long?
+                )
+        }
+}

app/src/main/java/io/timelimit/android/ui/widget/TimesWidgetContentLoader.kt

@@ -0,0 +1,135 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MediatorLiveData
+import io.timelimit.android.async.Threads
+import io.timelimit.android.data.extensions.sortedCategories
+import io.timelimit.android.data.model.UserType
+import io.timelimit.android.livedata.ignoreUnchanged
+import io.timelimit.android.logic.AppLogic
+import io.timelimit.android.logic.RealTime
+import io.timelimit.android.logic.blockingreason.CategoryHandlingCache
+
+object TimesWidgetContentLoader {
+    fun with(logic: AppLogic): LiveData<TimesWidgetContent> {
+        val database = logic.database
+        val realTimeLogic = logic.realTimeLogic
+        val realTime = RealTime.newInstance()
+        val categoryHandlingCache = CategoryHandlingCache()
+        val handler = Threads.mainThreadHandler
+
+        val deviceAndUserRelatedDataLive = database.derivedDataDao().getUserAndDeviceRelatedDataLive()
+        var deviceAndUserRelatedDataLiveLoaded = false
+
+        val batteryStatusLive = logic.platformIntegration.getBatteryStatusLive()
+
+        lateinit var timeModificationListener: () -> Unit
+        lateinit var updateByClockRunnable: Runnable
+        var isActive = false
+
+        val newResult = object: MediatorLiveData<TimesWidgetContent>() {
+            override fun onActive() {
+                super.onActive()
+
+                isActive = true
+
+                realTimeLogic.registerTimeModificationListener(timeModificationListener)
+
+                // ensure that the next update gets scheduled
+                updateByClockRunnable.run()
+            }
+
+            override fun onInactive() {
+                super.onInactive()
+
+                isActive = true
+
+                realTimeLogic.unregisterTimeModificationListener(timeModificationListener)
+                handler.removeCallbacks(updateByClockRunnable)
+            }
+        }
+
+        fun update() {
+            handler.removeCallbacks(updateByClockRunnable)
+
+            if (!deviceAndUserRelatedDataLiveLoaded) { return }
+
+            val deviceAndUserRelatedData = deviceAndUserRelatedDataLive.value
+            val userRelatedData = deviceAndUserRelatedData?.userRelatedData
+            val canSwitchToDefaultUser = deviceAndUserRelatedData?.deviceRelatedData?.canSwitchToDefaultUser ?: false
+
+            if (deviceAndUserRelatedData == null) {
+                newResult.value = TimesWidgetContent.UnconfiguredDevice
+
+                return
+            } else if (userRelatedData?.user?.type != UserType.Child) {
+                newResult.value = TimesWidgetContent.NoChildUser(
+                    canSwitchToDefaultUser = canSwitchToDefaultUser
+                )
+
+                return
+            }
+
+            realTimeLogic.getRealTime(realTime)
+
+            categoryHandlingCache.reportStatus(
+                user = userRelatedData,
+                timeInMillis = realTime.timeInMillis,
+                batteryStatus = logic.platformIntegration.getBatteryStatus(),
+                shouldTrustTimeTemporarily = realTime.shouldTrustTimeTemporarily,
+                assumeCurrentDevice = true,
+                currentNetworkId = null, // not relevant here
+                hasPremiumOrLocalMode = false   // not relevant here
+            )
+
+            var maxTime = Long.MAX_VALUE
+
+            val categories = userRelatedData.sortedCategories().map { (level, category) ->
+                val handling = categoryHandlingCache.get(categoryId = category.category.id)
+
+                maxTime = maxTime.coerceAtMost(handling.dependsOnMaxTime)
+
+                TimesWidgetContent.Categories.Item(
+                        categoryId = category.category.id,
+                        categoryName = category.category.title,
+                        level = level,
+                        remainingTimeToday = handling.remainingTime?.includingExtraTime
+                )
+            }
+
+            newResult.value = TimesWidgetContent.Categories(
+                categories = categories,
+                canSwitchToDefaultUser = canSwitchToDefaultUser
+            )
+
+            if (isActive && maxTime != Long.MAX_VALUE) {
+                val delay = maxTime - realTime.timeInMillis
+
+                handler.postDelayed(updateByClockRunnable, delay)
+            }
+        }
+
+        timeModificationListener = { update() }
+        updateByClockRunnable = Runnable { update() }
+
+        newResult.addSource(deviceAndUserRelatedDataLive) { deviceAndUserRelatedDataLiveLoaded = true; update() }
+        newResult.addSource(batteryStatusLive) { update() }
+
+        return newResult.ignoreUnchanged()
+    }
+}

app/src/main/java/io/timelimit/android/ui/widget/TimesWidgetItem.kt

@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,8 +15,8 @@
  */
 package io.timelimit.android.ui.widget
 
-data class TimesWidgetItem(
-        val title: String,
-        val level: Int,
-        val remainingTimeToday: Long?
-)
+sealed class TimesWidgetItem {
+    data class TextMessage(val textRessourceId: Int): TimesWidgetItem()
+    data class Category(val category: TimesWidgetContent.Categories.Item): TimesWidgetItem()
+    object DefaultUserButton: TimesWidgetItem()
+}

app/src/main/java/io/timelimit/android/ui/widget/TimesWidgetItems.kt

@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,107 +15,31 @@
  */
 package io.timelimit.android.ui.widget
 
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MediatorLiveData
-import io.timelimit.android.async.Threads
-import io.timelimit.android.data.extensions.sortedCategories
-import io.timelimit.android.livedata.ignoreUnchanged
-import io.timelimit.android.logic.AppLogic
-import io.timelimit.android.logic.RealTime
-import io.timelimit.android.logic.blockingreason.CategoryHandlingCache
+import io.timelimit.android.R
 
 object TimesWidgetItems {
-    fun with(logic: AppLogic): LiveData<List<TimesWidgetItem>> {
-        val database = logic.database
-        val realTimeLogic = logic.realTimeLogic
-        val categoryHandlingCache = CategoryHandlingCache()
-        val realTime = RealTime.newInstance()
-        val handler = Threads.mainThreadHandler
+    fun with(content: TimesWidgetContent, config: TimesWidgetConfig, appWidgetId: Int): List<TimesWidgetItem> = when (content) {
+        is TimesWidgetContent.UnconfiguredDevice -> listOf(TimesWidgetItem.TextMessage(R.string.widget_msg_unconfigured))
+        is TimesWidgetContent.NoChildUser -> {
+            val base = TimesWidgetItem.TextMessage(R.string.widget_msg_no_child)
 
-        val deviceAndUserRelatedDataLive = database.derivedDataDao().getUserAndDeviceRelatedDataLive()
-        var deviceAndUserRelatedDataLiveLoaded = false
+            if (content.canSwitchToDefaultUser) listOf(base, TimesWidgetItem.DefaultUserButton)
+            else listOf(base)
+        }
+        is TimesWidgetContent.Categories -> {
+            val categoryFilter = config.widgetCategoriesByWidgetId[appWidgetId] ?: emptySet()
 
-        val batteryStatusLive = logic.platformIntegration.getBatteryStatusLive()
+            val categoryItems = if (content.categories.isEmpty()) listOf(TimesWidgetItem.TextMessage(R.string.widget_msg_no_category))
+            else if (categoryFilter.isEmpty()) content.categories.map { TimesWidgetItem.Category(it) }
+            else {
+                val filteredCategories = content.categories.filter { categoryFilter.contains(it.categoryId) }
 
-        lateinit var timeModificationListener: () -> Unit
-        lateinit var updateByClockRunnable: Runnable
-        var isActive = false
-
-        val newResult = object: MediatorLiveData<List<TimesWidgetItem>>() {
-            override fun onActive() {
-                super.onActive()
-
-                isActive = true
-
-                realTimeLogic.registerTimeModificationListener(timeModificationListener)
-
-                // ensure that the next update gets scheduled
-                updateByClockRunnable.run()
+                if (filteredCategories.isEmpty()) listOf(TimesWidgetItem.TextMessage(R.string.widget_msg_no_filtered_category))
+                else filteredCategories.map { TimesWidgetItem.Category(it) }
             }
 
-            override fun onInactive() {
-                super.onInactive()
-
-                isActive = true
-
-                realTimeLogic.unregisterTimeModificationListener(timeModificationListener)
-                handler.removeCallbacks(updateByClockRunnable)
+            if (content.canSwitchToDefaultUser) categoryItems + TimesWidgetItem.DefaultUserButton
+            else categoryItems
         }
     }
-
-        fun update() {
-            handler.removeCallbacks(updateByClockRunnable)
-
-            if (!deviceAndUserRelatedDataLiveLoaded) { return }
-
-            val deviceAndUserRelatedData = deviceAndUserRelatedDataLive.value
-            val userRelatedData = deviceAndUserRelatedData?.userRelatedData
-
-            if (userRelatedData == null) {
-                newResult.value = emptyList(); return
-            }
-
-            realTimeLogic.getRealTime(realTime)
-
-            categoryHandlingCache.reportStatus(
-                    user = userRelatedData,
-                    timeInMillis = realTime.timeInMillis,
-                    batteryStatus = logic.platformIntegration.getBatteryStatus(),
-                    shouldTrustTimeTemporarily = realTime.shouldTrustTimeTemporarily,
-                    assumeCurrentDevice = true,
-                    currentNetworkId = null, // not relevant here
-                    hasPremiumOrLocalMode = false   // not relevant here
-            )
-
-            var maxTime = Long.MAX_VALUE
-
-            val list = userRelatedData.sortedCategories().map { (level, category) ->
-                val handling = categoryHandlingCache.get(categoryId = category.category.id)
-
-                maxTime = maxTime.coerceAtMost(handling.dependsOnMaxTime)
-
-                TimesWidgetItem(
-                        title = category.category.title,
-                        level = level,
-                        remainingTimeToday = handling.remainingTime?.includingExtraTime
-                )
-            }
-
-            newResult.value = list
-
-            if (isActive && maxTime != Long.MAX_VALUE) {
-                val delay = maxTime - realTime.timeInMillis
-
-                handler.postDelayed(updateByClockRunnable, delay)
-            }
-        }
-
-        timeModificationListener = { update() }
-        updateByClockRunnable = Runnable { update() }
-
-        newResult.addSource(deviceAndUserRelatedDataLive) { deviceAndUserRelatedDataLiveLoaded = true; update() }
-        newResult.addSource(batteryStatusLive) { update() }
-
-        return newResult.ignoreUnchanged()
-    }
 }

app/src/main/java/io/timelimit/android/ui/widget/TimesWidgetProvider.kt

@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,13 +17,45 @@ package io.timelimit.android.ui.widget
 
 import android.appwidget.AppWidgetManager
 import android.appwidget.AppWidgetProvider
+import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
+import android.util.Log
 import android.widget.RemoteViews
+import androidx.core.content.getSystemService
+import io.timelimit.android.BuildConfig
 import io.timelimit.android.R
+import io.timelimit.android.async.Threads
+import io.timelimit.android.integration.platform.android.BackgroundActionService
 import io.timelimit.android.logic.DefaultAppLogic
 
 class TimesWidgetProvider: AppWidgetProvider() {
+    companion object {
+        private const val LOG_TAG = "TimesWidgetProvider"
+
+        private fun handleUpdate(context: Context, appWidgetManager: AppWidgetManager, appWidgetIds: IntArray) {
+            for (appWidgetId in appWidgetIds) {
+                val views = RemoteViews(context.packageName, R.layout.widget_times)
+
+                views.setRemoteAdapter(android.R.id.list, TimesWidgetService.intent(context, appWidgetId))
+                views.setPendingIntentTemplate(android.R.id.list, BackgroundActionService.getSwitchToDefaultUserIntent(context))
+                views.setEmptyView(android.R.id.list, android.R.id.empty)
+
+                appWidgetManager.updateAppWidget(appWidgetId, views)
+            }
+
+            TimesWidgetService.notifyContentChanges(context)
+        }
+
+        fun triggerUpdates(context: Context) {
+            context.getSystemService<AppWidgetManager>()?.also { appWidgetManager ->
+                val appWidgetIds = appWidgetManager.getAppWidgetIds(ComponentName(context, TimesWidgetProvider::class.java))
+
+                handleUpdate(context, appWidgetManager, appWidgetIds)
+            }
+        }
+    }
+
     override fun onReceive(context: Context, intent: Intent?) {
         super.onReceive(context, intent)
 
@@ -34,13 +66,38 @@ class TimesWidgetProvider: AppWidgetProvider() {
     override fun onUpdate(context: Context, appWidgetManager: AppWidgetManager, appWidgetIds: IntArray) {
         super.onUpdate(context, appWidgetManager, appWidgetIds)
 
-        for (appWidgetId in appWidgetIds) {
-            val views = RemoteViews(context.packageName, R.layout.widget_times)
+        handleUpdate(context, appWidgetManager, appWidgetIds)
+    }
 
-            views.setRemoteAdapter(android.R.id.list, Intent(context, TimesWidgetService::class.java))
-            views.setEmptyView(android.R.id.list, android.R.id.empty)
+    override fun onDeleted(context: Context, appWidgetIds: IntArray) {
+        super.onDeleted(context, appWidgetIds)
 
-            appWidgetManager.updateAppWidget(appWidgetId, views)
+        val database = DefaultAppLogic.with(context).database
+
+        Threads.database.execute {
+            try {
+                database.widgetCategory().deleteByWidgetIds(appWidgetIds)
+            } catch (ex: Exception) {
+                if (BuildConfig.DEBUG) {
+                    Log.d(LOG_TAG, "onDisabled", ex)
+                }
+            }
+        }
+    }
+
+    override fun onDisabled(context: Context) {
+        super.onDisabled(context)
+
+        val database = DefaultAppLogic.with(context).database
+
+        Threads.database.execute {
+            try {
+                database.widgetCategory().deleteAll()
+            } catch (ex: Exception) {
+                if (BuildConfig.DEBUG) {
+                    Log.d(LOG_TAG, "onDisabled", ex)
+                }
+            }
         }
     }
 }

app/src/main/java/io/timelimit/android/ui/widget/TimesWidgetService.kt

@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2021 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,101 +17,150 @@ package io.timelimit.android.ui.widget
 
 import android.appwidget.AppWidgetManager
 import android.content.ComponentName
+import android.content.Context
 import android.content.Intent
+import android.net.Uri
 import android.view.View
 import android.widget.RemoteViews
 import android.widget.RemoteViewsService
+import androidx.core.content.getSystemService
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.Observer
+import androidx.lifecycle.map
 import io.timelimit.android.R
 import io.timelimit.android.async.Threads
+import io.timelimit.android.livedata.mergeLiveDataWaitForValues
 import io.timelimit.android.logic.DefaultAppLogic
 import io.timelimit.android.ui.manage.child.category.CategoryItemLeftPadding
-import io.timelimit.android.util.TimeTextUtil
 
 class TimesWidgetService: RemoteViewsService() {
-    private val appWidgetManager: AppWidgetManager by lazy { AppWidgetManager.getInstance(this) }
+    companion object {
+        private const val EXTRA_APP_WIDGET_ID = "appWidgetId"
 
-    private val categoriesLive: LiveData<List<TimesWidgetItem>> by lazy {
-        TimesWidgetItems.with(DefaultAppLogic.with(this))
-    }
+        fun intent(context: Context, appWidgetId: Int) = Intent(context, TimesWidgetService::class.java)
+            .setData(Uri.parse("widget:$appWidgetId"))
+            .putExtra(EXTRA_APP_WIDGET_ID, appWidgetId)
 
-    private var categoriesInput: List<TimesWidgetItem> = emptyList()
-    private var categoriesCurrent: List<TimesWidgetItem> = categoriesInput
-
-    private val categoriesObserver = Observer<List<TimesWidgetItem>> {
-        categoriesInput = it
-
-        val widgetIds = appWidgetManager.getAppWidgetIds(ComponentName(this, TimesWidgetProvider::class.java))
+        fun notifyContentChanges(context: Context) {
+            context.getSystemService<AppWidgetManager>()?.also { appWidgetManager ->
+                val widgetIds = appWidgetManager.getAppWidgetIds(ComponentName(context, TimesWidgetProvider::class.java))
 
                 appWidgetManager.notifyAppWidgetViewDataChanged(widgetIds, android.R.id.list)
             }
+        }
+    }
+
+    private val content: LiveData<Pair<TimesWidgetContent, TimesWidgetConfig>> by lazy {
+        val logic = DefaultAppLogic.with(this)
+
+        val content = TimesWidgetContentLoader.with(logic)
+        val config = logic.database.widgetCategory().queryLive().map { TimesWidgetConfig(it) }
+
+        mergeLiveDataWaitForValues(content, config)
+    }
+
+    private var observerCounter = 0
+    private var contentInput: Pair<TimesWidgetContent, TimesWidgetConfig>? = null
+
+    private val contentObserver = Observer<Pair<TimesWidgetContent, TimesWidgetConfig>> {
+        contentInput = it
+
+        notifyContentChanges(this)
+    }
+
+    private fun createFactory(appWidgetId: Int) = object : RemoteViewsFactory {
+        private var currentItems: List<TimesWidgetItem> = emptyList()
+
+        init { onDataSetChanged() }
 
-    private val factory = object : RemoteViewsFactory {
         override fun onCreate() {
-            Threads.mainThreadHandler.post { categoriesLive.observeForever(categoriesObserver) }
+            Threads.mainThreadHandler.post {
+                if (observerCounter < 0) throw IllegalStateException()
+                else if (observerCounter == 0) content.observeForever(contentObserver)
+
+                observerCounter++
+            }
         }
 
         override fun onDestroy() {
-            Threads.mainThreadHandler.post { categoriesLive.removeObserver(categoriesObserver) }
+            Threads.mainThreadHandler.post {
+                if (observerCounter <= 0) throw IllegalStateException()
+                else if (observerCounter == 1) content.removeObserver(contentObserver)
+
+                observerCounter--
+            }
         }
 
         override fun onDataSetChanged() {
-            categoriesCurrent = categoriesInput
+            currentItems = contentInput?.let { TimesWidgetItems.with(it.first, it.second, appWidgetId) } ?: emptyList()
         }
 
-        override fun getCount(): Int = categoriesCurrent.size
+        override fun getCount(): Int = currentItems.size
 
         override fun getViewAt(position: Int): RemoteViews {
-            if (position >= categoriesCurrent.size) {
-                return RemoteViews(packageName, R.layout.widget_times_item)
+            if (position >= currentItems.size) {
+                return RemoteViews(packageName, R.layout.widget_times_category_item)
             }
 
-            val category = categoriesCurrent[position]
-            val result = RemoteViews(packageName, R.layout.widget_times_item)
-
-            result.setTextViewText(R.id.title, category.title)
-            result.setTextViewText(
-                    R.id.subtitle,
-                    if (category.remainingTimeToday == null)
-                        getString(R.string.manage_child_category_no_time_limits)
-                    else
-                        TimeTextUtil.remaining(category.remainingTimeToday.toInt(), this@TimesWidgetService)
-            )
-
-            result.setViewPadding(
-                    R.id.widgetInnerContainer,
-                    // not much space here => / 2
-                    CategoryItemLeftPadding.calculate(category.level, this@TimesWidgetService) / 2,
-                    0, 0, 0
-            )
+            fun createCategoryItem(title: String?, subtitle: String, paddingLeft: Int) = RemoteViews(packageName, R.layout.widget_times_category_item).also { result ->
+                result.setTextViewText(R.id.title, title ?: "")
+                result.setTextViewText(R.id.subtitle, subtitle)
 
+                result.setViewPadding(R.id.widgetInnerContainer, paddingLeft, 0, 0, 0)
+                result.setViewVisibility(R.id.title, if (title != null) View.VISIBLE else View.GONE)
                 result.setViewVisibility(R.id.topPadding, if (position == 0) View.VISIBLE else View.GONE)
                 result.setViewVisibility(R.id.bottomPadding, if (position == count - 1) View.VISIBLE else View.GONE)
-
-            return result
             }
 
-        override fun getLoadingView(): RemoteViews? {
-            return null
+            val item = currentItems[position]
+
+            return when (item) {
+                is TimesWidgetItem.Category -> item.category.let { category ->
+                    createCategoryItem(
+                        title = if (category.remainingTimeToday == null)
+                            getString(R.string.manage_child_category_no_time_limits_short)
+                        else {
+                            val remainingTimeToday = category.remainingTimeToday.coerceAtLeast(0) / (1000 * 60)
+                            val minutes = remainingTimeToday % 60
+                            val hours = remainingTimeToday / 60
+
+                            if (hours == 0L) "$minutes m"
+                            else "$hours h $minutes m"
+                        },
+                        subtitle = category.categoryName,
+                        // not much space here => / 2
+                        paddingLeft = CategoryItemLeftPadding.calculate(category.level, this@TimesWidgetService) / 2
+                    )
+                }
+                is TimesWidgetItem.TextMessage -> createCategoryItem(null, getString(item.textRessourceId), 0)
+                is TimesWidgetItem.DefaultUserButton -> RemoteViews(packageName, R.layout.widget_times_button).also { result ->
+                    result.setTextViewText(R.id.button, getString(R.string.manage_device_default_user_switch_btn))
+                    result.setOnClickFillInIntent(R.id.button, Intent())
+                }
+            }
         }
 
-        override fun getViewTypeCount(): Int {
-            return 1
-        }
+        override fun getLoadingView(): RemoteViews?  = null
+
+        override fun getViewTypeCount(): Int = 2
 
         override fun getItemId(position: Int): Long {
-            if (position >= categoriesCurrent.size) {
+            if (position >= currentItems.size) {
                 return -(position.toLong())
             }
 
-            return categoriesCurrent[position].hashCode().toLong()
+            val item = currentItems[position]
+
+            return when (item) {
+                is TimesWidgetItem.Category -> item.category.categoryId.hashCode()
+                else -> item.hashCode()
+            }.toLong()
         }
 
-        override fun hasStableIds(): Boolean {
-            return true
-        }
+        override fun hasStableIds(): Boolean = true
     }
 
-    override fun onGetViewFactory(intent: Intent): RemoteViewsFactory = factory
+    override fun onGetViewFactory(intent: Intent): RemoteViewsFactory = createFactory(
+        intent.getIntExtra(EXTRA_APP_WIDGET_ID, 0)
+    )
 }

app/src/main/java/io/timelimit/android/ui/widget/config/UnconfiguredDialogFragment.kt

@@ -0,0 +1,51 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget.config
+
+import android.app.Dialog
+import android.content.DialogInterface
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.fragment.app.DialogFragment
+import androidx.fragment.app.activityViewModels
+import io.timelimit.android.R
+
+class UnconfiguredDialogFragment: DialogFragment() {
+    companion object {
+        const val DIALOG_TAG = "UnconfiguredDialogFragment"
+    }
+
+    private val model: WidgetConfigModel by activityViewModels()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        model.state.observe(this) {
+            if (!(it is WidgetConfigModel.State.Unconfigured)) dismissAllowingStateLoss()
+        }
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog = AlertDialog.Builder(requireContext(), theme)
+        .setMessage(R.string.widget_msg_unconfigured)
+        .setPositiveButton(R.string.generic_ok) { _, _ -> model.userCancel() }
+        .create()
+
+    override fun onCancel(dialog: DialogInterface) {
+        super.onCancel(dialog)
+
+        model.userCancel()
+    }
+}

app/src/main/java/io/timelimit/android/ui/widget/config/WidgetConfigActivity.kt

@@ -0,0 +1,78 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget.config
+
+import android.appwidget.AppWidgetManager
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Toast
+import androidx.activity.viewModels
+import androidx.fragment.app.FragmentActivity
+import io.timelimit.android.R
+import io.timelimit.android.extensions.showSafe
+
+class WidgetConfigActivity: FragmentActivity() {
+    private val model: WidgetConfigModel by viewModels()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        if (model.state.value == WidgetConfigModel.State.WaitingForInit) {
+            model.init(
+                intent?.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID)
+                    ?: AppWidgetManager.INVALID_APPWIDGET_ID
+            )
+        }
+
+        model.state.observe(this) { state ->
+            when (state) {
+                is WidgetConfigModel.State.WaitingForInit -> {/* ignore */}
+                is WidgetConfigModel.State.Working -> {/* ignore */}
+                is WidgetConfigModel.State.Unconfigured -> {
+                    if (supportFragmentManager.findFragmentByTag(UnconfiguredDialogFragment.DIALOG_TAG) == null) {
+                        UnconfiguredDialogFragment().showSafe(supportFragmentManager, UnconfiguredDialogFragment.DIALOG_TAG)
+                    }
+                }
+                is WidgetConfigModel.State.ShowModeSelection -> {
+                    if (supportFragmentManager.findFragmentByTag(WidgetConfigModeDialogFragment.DIALOG_TAG) == null) {
+                        WidgetConfigModeDialogFragment().showSafe(supportFragmentManager, WidgetConfigModeDialogFragment.DIALOG_TAG)
+                    }
+                }
+                is WidgetConfigModel.State.ShowCategorySelection -> {
+                    if (supportFragmentManager.findFragmentByTag(WidgetConfigFilterDialogFragment.DIALOG_TAG) == null) {
+                        WidgetConfigFilterDialogFragment().showSafe(supportFragmentManager, WidgetConfigFilterDialogFragment.DIALOG_TAG)
+                    }
+                }
+                is WidgetConfigModel.State.Done -> {
+                    setResult(
+                        RESULT_OK,
+                        Intent().putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, state.appWidgetId)
+                    )
+
+                    finish()
+                }
+                is WidgetConfigModel.State.ErrorCancel -> {
+                    Toast.makeText(this, R.string.error_general, Toast.LENGTH_SHORT).show()
+
+                    finish()
+                }
+                is WidgetConfigModel.State.UserCancel -> finish()
+            }
+        }
+
+        setResult(RESULT_CANCELED)
+    }
+}

app/src/main/java/io/timelimit/android/ui/widget/config/WidgetConfigFilterDialogFragment.kt

@@ -0,0 +1,88 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget.config
+
+import android.app.Dialog
+import android.content.DialogInterface
+import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AlertDialog
+import androidx.fragment.app.DialogFragment
+import androidx.fragment.app.activityViewModels
+import io.timelimit.android.R
+
+class WidgetConfigFilterDialogFragment: DialogFragment() {
+    companion object {
+        private const val STATE_CATEGORY_IDS = "categoryIds"
+
+        const val DIALOG_TAG = "WidgetConfigFilterDialogFragment"
+    }
+
+    private val model: WidgetConfigModel by activityViewModels()
+    private val selectedCategoryIds = mutableSetOf<String>()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        model.state.value?.also { state ->
+            if (state is WidgetConfigModel.State.ShowCategorySelection) {
+                selectedCategoryIds.clear()
+                selectedCategoryIds.addAll(state.selectedFilterCategories)
+            }
+        }
+
+        savedInstanceState?.also {
+            selectedCategoryIds.clear()
+            selectedCategoryIds.addAll(it.getStringArray(STATE_CATEGORY_IDS) ?: emptyArray())
+        }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+
+        outState.putStringArray(STATE_CATEGORY_IDS, selectedCategoryIds.toTypedArray())
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val state = model.state.value
+
+        if (!(state is WidgetConfigModel.State.ShowCategorySelection)) return super.onCreateDialog(savedInstanceState)
+
+        return AlertDialog.Builder(requireContext(), theme)
+            .setMultiChoiceItems(
+                state.categories.map { it.title }.toTypedArray(),
+                state.categories.map { selectedCategoryIds.contains(it.id) }.toBooleanArray()
+            ) { _, index, checked ->
+                val categoryId = state.categories[index].id
+
+                if (checked) selectedCategoryIds.add(categoryId) else selectedCategoryIds.remove(categoryId)
+            }
+            .setPositiveButton(R.string.wiazrd_next) { _, _ ->
+                if (selectedCategoryIds.isEmpty()) {
+                    Toast.makeText(requireContext(), R.string.widget_config_error_filter_empty, Toast.LENGTH_SHORT).show()
+
+                    model.userCancel()
+                } else model.selectFilterItems(selectedCategoryIds)
+            }
+            .create()
+    }
+
+    override fun onCancel(dialog: DialogInterface) {
+        super.onCancel(dialog)
+
+        model.userCancel()
+    }
+}

app/src/main/java/io/timelimit/android/ui/widget/config/WidgetConfigModeDialogFragment.kt

@@ -0,0 +1,77 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget.config
+
+import android.app.Dialog
+import android.content.DialogInterface
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.fragment.app.DialogFragment
+import androidx.fragment.app.activityViewModels
+import io.timelimit.android.R
+
+class WidgetConfigModeDialogFragment: DialogFragment() {
+    companion object {
+        private const val STATE_SELECTION = "selection"
+
+        const val DIALOG_TAG = "WidgetConfigModeDialogFragment"
+    }
+
+    private val model: WidgetConfigModel by activityViewModels()
+    private var selection = 0
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        model.state.value?.also {
+            if (it is WidgetConfigModel.State.ShowModeSelection) {
+                selection = if (it.selectedFilterCategories.isEmpty()) 0 else 1
+            }
+        }
+
+        savedInstanceState?.also { selection = it.getInt(STATE_SELECTION) }
+
+        model.state.observe(this) {
+            if (!(it is WidgetConfigModel.State.ShowModeSelection)) dismissAllowingStateLoss()
+        }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+
+        outState.putInt(STATE_SELECTION, selection)
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog = AlertDialog.Builder(requireContext(), theme)
+        .setSingleChoiceItems(
+            arrayOf(
+                getString(R.string.widget_config_mode_all),
+                getString(R.string.widget_config_mode_filter)
+            ),
+            selection
+        ) { _, selectedItemIndex -> selection = selectedItemIndex }
+        .setPositiveButton(R.string.wiazrd_next) { _, _ ->
+            if (selection == 0) model.selectModeAll()
+            else model.selectModeFilter()
+        }
+        .create()
+
+    override fun onCancel(dialog: DialogInterface) {
+        super.onCancel(dialog)
+
+        model.userCancel()
+    }
+}

app/src/main/java/io/timelimit/android/ui/widget/config/WidgetConfigModel.kt

@@ -0,0 +1,165 @@
+/*
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.widget.config
+
+import android.app.Application
+import android.util.Log
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.viewModelScope
+import io.timelimit.android.BuildConfig
+import io.timelimit.android.async.Threads
+import io.timelimit.android.coroutines.executeAndWait
+import io.timelimit.android.data.extensions.sortedCategories
+import io.timelimit.android.data.model.Category
+import io.timelimit.android.data.model.UserType
+import io.timelimit.android.data.model.WidgetCategory
+import io.timelimit.android.livedata.castDown
+import io.timelimit.android.logic.DefaultAppLogic
+import kotlinx.coroutines.launch
+
+class WidgetConfigModel(application: Application): AndroidViewModel(application) {
+    companion object {
+        private const val LOG_TAG = "WidgetConfigModel"
+    }
+
+    private val stateInternal = MutableLiveData<State>().apply { value = State.WaitingForInit }
+    private val database = DefaultAppLogic.with(application).database
+
+    val state = stateInternal.castDown()
+
+    fun init(appWidgetId: Int) {
+        if (state.value != State.WaitingForInit) return
+        stateInternal.value = State.Working
+
+        viewModelScope.launch {
+            try {
+                val (deviceAndUserRelatedData, selectedFilterCategories) = Threads.database.executeAndWait {
+                    database.runInTransaction {
+                        val deviceAndUserRelatedData = database.derivedDataDao().getUserAndDeviceRelatedDataSync()
+                        val selectedFilterCategories = database.widgetCategory().queryByWidgetIdSync(appWidgetId).toSet()
+
+                        Pair(deviceAndUserRelatedData, selectedFilterCategories)
+                    }
+                }
+
+                val isNoChildUser = deviceAndUserRelatedData?.userRelatedData?.user?.type != UserType.Child
+                val currentUserCategories = deviceAndUserRelatedData?.userRelatedData?.sortedCategories()?.map { it.second.category }
+
+                if (currentUserCategories == null || isNoChildUser) {
+                    stateInternal.value = State.Unconfigured
+
+                    return@launch
+                }
+
+                stateInternal.value = State.ShowModeSelection(appWidgetId, selectedFilterCategories, currentUserCategories)
+            } catch (ex: Exception) {
+                if (BuildConfig.DEBUG) {
+                    Log.d(LOG_TAG, "selectModeAll", ex)
+                }
+
+                stateInternal.value = State.ErrorCancel
+            }
+        }
+    }
+
+    fun selectModeAll() {
+        val oldState = state.value
+        if (!(oldState is State.ShowModeSelection)) return
+        stateInternal.value = State.Working
+
+        viewModelScope.launch {
+            try {
+                Threads.database.executeAndWait {
+                    database.widgetCategory().deleteByWidgetId(oldState.appWidgetId)
+                }
+
+                stateInternal.value = State.Done(appWidgetId = oldState.appWidgetId)
+            } catch (ex: Exception) {
+                if (BuildConfig.DEBUG) {
+                    Log.d(LOG_TAG, "selectModeAll", ex)
+                }
+
+                stateInternal.value = State.ErrorCancel
+            }
+        }
+    }
+
+    fun selectModeFilter() {
+        val oldState = state.value
+        if (!(oldState is State.ShowModeSelection)) return
+        stateInternal.value = State.Working
+
+        stateInternal.value = State.ShowCategorySelection(
+            appWidgetId = oldState.appWidgetId,
+            selectedFilterCategories = oldState.selectedFilterCategories,
+            categories = oldState.categories
+        )
+    }
+
+    fun selectFilterItems(selectedCategoryIds: Set<String>) {
+        val oldState = state.value
+        if (!(oldState is State.ShowCategorySelection)) return
+        stateInternal.value = State.Working
+
+        viewModelScope.launch {
+            try {
+                Threads.database.executeAndWait {
+                    val userAndDeviceRelatedData = database.derivedDataDao().getUserAndDeviceRelatedDataSync()
+                    val currentCategoryIds = userAndDeviceRelatedData!!.userRelatedData!!.categoryById.keys
+
+                    val categoriesToRemove = currentCategoryIds - selectedCategoryIds
+                    val categoriesToAdd = selectedCategoryIds.filter { currentCategoryIds.contains(it) }
+
+                    if (categoriesToRemove.isNotEmpty()) {
+                        database.widgetCategory().deleteByWidgetIdAndCategoryIds(
+                            oldState.appWidgetId, categoriesToRemove.toList()
+                        )
+                    }
+
+                    if (categoriesToAdd.isNotEmpty()) {
+                        database.widgetCategory().insert(
+                            categoriesToAdd.toList().map { WidgetCategory(oldState.appWidgetId, it) }
+                        )
+                    }
+                }
+
+                stateInternal.value = State.Done(appWidgetId = oldState.appWidgetId)
+            } catch (ex: Exception) {
+                if (BuildConfig.DEBUG) {
+                    Log.d(LOG_TAG, "selectModeAll", ex)
+                }
+
+                stateInternal.value = State.ErrorCancel
+            }
+        }
+    }
+
+    fun userCancel() {
+        stateInternal.value = State.UserCancel
+    }
+
+    sealed class State {
+        object WaitingForInit: State()
+        object Working: State()
+        data class ShowModeSelection(val appWidgetId: Int, val selectedFilterCategories: Set<String>, val categories: List<Category>): State()
+        data class ShowCategorySelection(val appWidgetId: Int, val selectedFilterCategories: Set<String>, val categories: List<Category>): State()
+        data class Done(val appWidgetId: Int): State()
+        object Unconfigured: State()
+        object UserCancel: State()
+        object ErrorCancel: State()
+    }
+}

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

@@ -1,6 +1,6 @@
-<?xml version="1.0" encoding="utf-8"?>
 <!--
-  TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+    TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation version 3 of the License.
@@ -17,7 +17,7 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@color/widget_background">
+    android:background="@color/widgetBackground">
 
     <ListView
         android:divider="@color/transparent"
@@ -26,13 +26,11 @@
         android:layout_height="match_parent"
         android:listSelector="@android:color/transparent"/>
 
-    <TextView
+    <ProgressBar
         android:id="@android:id/empty"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:gravity="center"
-        android:text="@string/widget_empty_view"
-        android:textAppearance="?android:textAppearanceMedium"
-        android:textColor="@color/white"/>
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        style="?android:attr/progressBarStyleLarge"
+        android:layout_gravity="center" />
 
 </FrameLayout>

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

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation version 3 of the License.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program. If not, see <https://www.gnu.org/licenses/>.
+-->
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:background="@color/widget_background"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingTop="16dp"
+    android:paddingBottom="16dp"
+    android:paddingLeft="16dp"
+    android:paddingRight="16dp">
+
+    <Button
+        android:id="@+id/button"
+        tools:text="Action"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+</FrameLayout>

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+  TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation version 3 of the License.
@@ -35,20 +35,21 @@
             android:layout_height="12dp" />
 
         <TextView
-            tools:text="Erlaubte Apps"
+            tools:text="3 m"
             android:id="@+id/title"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:textAppearance="?android:textAppearanceMedium"
-            android:textColor="@color/white"/>
+            android:textAppearance="?android:textAppearanceLarge"
+            android:textStyle="bold"
+            android:textColor="@color/widgetText"/>
 
         <TextView
-            tools:text="wenige Minuten verbleibend"
+            tools:text="Erlaubte Apps"
             android:id="@+id/subtitle"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:textAppearance="?android:textAppearanceSmall"
-            android:textColor="@color/white"/>
+            android:textAppearance="?android:textAppearanceMedium"
+            android:textColor="@color/widgetText"/>
 
         <FrameLayout
             android:id="@+id/bottomPadding"

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

@@ -0,0 +1,58 @@
+<!--
+    TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation version 3 of the License.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program. If not, see <https://www.gnu.org/licenses/>.
+-->
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp"
+    android:background="@color/widgetBackground">
+
+    <TextView
+        tools:ignore="HardcodedText"
+        android:text="no limit"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textAppearance="?android:textAppearanceLarge"
+        android:textStyle="bold"
+        android:textColor="@color/widgetText"/>
+
+    <TextView
+        android:paddingBottom="8dp"
+        android:text="@string/setup_category_allowed"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textAppearance="?android:textAppearanceMedium"
+        android:textColor="@color/widgetText"/>
+
+    <TextView
+        tools:ignore="HardcodedText"
+        android:text="30 m"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textAppearance="?android:textAppearanceLarge"
+        android:textStyle="bold"
+        android:textColor="@color/widgetText"/>
+
+    <TextView
+        android:text="@string/setup_category_games"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textAppearance="?android:textAppearanceMedium"
+        android:textColor="@color/widgetText"/>
+
+</LinearLayout>

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

@@ -769,6 +769,7 @@
     <string name="manage_child_tab_other">erweiterte Einstellungen</string>
 
     <string name="manage_child_category_no_time_limits">Keine Zeitbegrenzung</string>
+    <string name="manage_child_category_no_time_limits_short">keine Begrenzung</string>
 
     <string name="manage_child_categories_intro_title">Kategorien</string>
     <string name="manage_child_categories_intro_text">
@@ -1608,10 +1609,13 @@
 
     <string name="util_day_from_to">%s bis %s</string>
 
-    <string name="widget_empty_view">Wenn dieses Gerät einem Kind zugeordnet
-        wird und dieses Kind Kategorien hat, dann sollten diese Kategorien
-        hier angezeigt werden.
-    </string>
+    <string name="widget_msg_unconfigured">Dieses Widget funktioniert nur auf beschränkten Geräten</string>
+    <string name="widget_msg_no_child">Momentan hat dieses Gerät keinen Kind-Benutzer</string>
+    <string name="widget_msg_no_category">Das Kind hat keine Kategorien</string>
+    <string name="widget_msg_no_filtered_category">Das Kind hat keine für das Widget ausgewählten Kategorien</string>
+    <string name="widget_config_mode_all">alle Kategorien anzeigen</string>
+    <string name="widget_config_mode_filter">sichtbare Kategorien filtern</string>
+    <string name="widget_config_error_filter_empty">Sie müssen mindestens eine Kategorie auswählen</string>
 
     <string name="wiazrd_next">Weiter</string>
 

app/src/main/res/values-night/colors.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+  TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation version 3 of the License.
@@ -23,4 +23,7 @@
     <color name="orange_text">#ff6f00</color>
     <color name="text_green">#4caf50</color>
     <color name="text_red">#f44</color>
+
+    <color name="widgetBackground">#000000</color>
+    <color name="widgetText">#ffffff</color>
 </resources>

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+  TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation version 3 of the License.
@@ -17,7 +17,8 @@
     <color name="colorPrimary">#009688</color>
     <color name="colorPrimaryDark">#00796B</color>
     <color name="colorAccent">#1976d2</color>
-    <color name="widget_background">#33000000</color>
+    <color name="widgetBackground">#ffffff</color>
+    <color name="widgetText">#000000</color>
 
     <color name="transparent">#00000000</color>
     <color name="gray">#9E9E9E</color>

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

@@ -821,6 +821,7 @@
     <string name="manage_child_tab_other">Advanced settings</string>
 
     <string name="manage_child_category_no_time_limits">no time limit</string>
+    <string name="manage_child_category_no_time_limits_short">no limit</string>
 
     <string name="manage_child_categories_intro_title">Categories</string>
     <string name="manage_child_categories_intro_text">
@@ -1656,10 +1657,13 @@
 
     <string name="util_day_from_to">%s to %s</string>
 
-    <string name="widget_empty_view">If this device is assigned to a child
-        and this child has got categories, then the categories should
-        appear here.
-    </string>
+    <string name="widget_msg_unconfigured">This Widget only works on limited devices</string>
+    <string name="widget_msg_no_child">This device is not used by a child right now</string>
+    <string name="widget_msg_no_category">This child does not have any categories</string>
+    <string name="widget_msg_no_filtered_category">For this child, no visible categories were chosen for this widget</string>
+    <string name="widget_config_mode_all">Show all Categories</string>
+    <string name="widget_config_mode_filter">Filter visible Categories</string>
+    <string name="widget_config_error_filter_empty">You must select at least one category</string>
 
     <string name="wiazrd_next">Next</string>
 

app/src/main/res/xml/times_widget_info.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  TimeLimit Copyright <C> 2019 - 2020 Jonas Lochmann
+    TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
+
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation version 3 of the License.
@@ -19,4 +20,7 @@
     android:updatePeriodMillis="0"
     android:resizeMode="horizontal|vertical"
     android:previewImage="@drawable/widget_preview"
+    android:configure="io.timelimit.android.ui.widget.config.WidgetConfigActivity"
+    android:widgetFeatures="reconfigurable|configuration_optional"
+    android:previewLayout="@layout/widget_times_preview"
     android:widgetCategory="home_screen" />