Add custom time warnings

app/src/main/java/io/timelimit/android/data/Database.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
@@ -40,6 +40,7 @@ interface Database {
     fun userLimitLoginCategoryDao(): UserLimitLoginCategoryDao
     fun categoryNetworkId(): CategoryNetworkIdDao
     fun childTasks(): ChildTaskDao
+    fun timeWarning(): CategoryTimeWarningDao
 
     fun <T> runInTransaction(block: () -> T): T
     fun <T> runInUnobservedTransaction(block: () -> T): T

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

@@ -280,4 +280,10 @@ object DatabaseMigrations {
             // nothing to do, there was just a new config item type added
         }
     }
+
+    val MIGRATE_TO_V40 = object: Migration(39, 40) {
+        override fun migrate(database: SupportSQLiteDatabase) {
+            database.execSQL("CREATE TABLE IF NOT EXISTS `category_time_warning` (`category_id` TEXT NOT NULL, `minutes` INTEGER NOT NULL, PRIMARY KEY(`category_id`, `minutes`), FOREIGN KEY(`category_id`) REFERENCES `category`(`id`) ON UPDATE CASCADE ON DELETE CASCADE )")
+        }
+    }
 }

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

@@ -50,8 +50,9 @@ import java.util.concurrent.TimeUnit
     SessionDuration::class,
     UserLimitLoginCategory::class,
     CategoryNetworkId::class,
-    ChildTask::class
+    ChildTask::class,
-], version = 39)
+    CategoryTimeWarning::class
+], version = 40)
 abstract class RoomDatabase: RoomDatabase(), io.timelimit.android.data.Database {
     companion object {
         private val lock = Object()
@@ -124,7 +125,8 @@ abstract class RoomDatabase: RoomDatabase(), io.timelimit.android.data.Database
                     DatabaseMigrations.MIGRATE_TO_V36,
                     DatabaseMigrations.MIGRATE_TO_V37,
                     DatabaseMigrations.MIGRATE_TO_V38,
-                    DatabaseMigrations.MIGRATE_TO_V39
+                    DatabaseMigrations.MIGRATE_TO_V39,
+                    DatabaseMigrations.MIGRATE_TO_V40
                 )
                 .setQueryExecutor(Threads.database)
                 .addCallback(object: Callback() {

app/src/main/java/io/timelimit/android/data/backup/DatabaseBackupLowlevel.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
@@ -45,6 +45,7 @@ object DatabaseBackupLowlevel {
     private const val USER_LIMIT_LOGIN_CATEGORY = "userLimitLoginCategory"
     private const val CATEGORY_NETWORK_ID = "categoryNetworkId"
     private const val CHILD_TASK = "childTask"
+    private const val CATEGORY_TIME_WARNINGS = "timeWarnings"
 
     fun outputAsBackupJson(database: Database, outputStream: OutputStream) {
         val writer = JsonWriter(OutputStreamWriter(outputStream, Charsets.UTF_8))
@@ -73,6 +74,14 @@ object DatabaseBackupLowlevel {
             writer.endArray()
         }
 
+        fun <T: JsonSerializable> handleCollection(name: String, items: List<T>) {
+            writer.name(name).beginArray()
+
+            items.forEach { it.serialize(writer) }
+
+            writer.endArray()
+        }
+
         handleCollection(APP) {offset, pageSize -> database.app().getAppPageSync(offset, pageSize) }
         handleCollection(CATEGORY) {offset: Int, pageSize: Int -> database.category().getCategoryPageSync(offset, pageSize) }
         handleCollection(CATEGORY_APP) { offset, pageSize -> database.categoryApp().getCategoryAppPageSync(offset, pageSize) }
@@ -94,6 +103,7 @@ object DatabaseBackupLowlevel {
         handleCollection(USER_LIMIT_LOGIN_CATEGORY) { offset, pageSize -> database.userLimitLoginCategoryDao().getAllowedContactPageSync(offset, pageSize) }
         handleCollection(CATEGORY_NETWORK_ID) { offset, pageSize -> database.categoryNetworkId().getPageSync(offset, pageSize) }
         handleCollection(CHILD_TASK) { offset, pageSize -> database.childTasks().getPageSync(offset, pageSize) }
+        handleCollection(CATEGORY_TIME_WARNINGS, database.timeWarning().getAllItemsSync())
 
         writer.endObject().flush()
     }
@@ -104,6 +114,7 @@ object DatabaseBackupLowlevel {
         var userLoginLimitCategories = emptyList<UserLimitLoginCategory>()
         var categoryNetworkId = emptyList<CategoryNetworkId>()
         var childTasks = emptyList<ChildTask>()
+        var timeWarnings = emptyList<CategoryTimeWarning>()
 
         database.runInTransaction {
             database.deleteAllData()
@@ -283,6 +294,19 @@ object DatabaseBackupLowlevel {
 
                         reader.endArray()
                     }
+                    CATEGORY_TIME_WARNINGS -> {
+                        reader.beginArray()
+
+                        mutableListOf<CategoryTimeWarning>().let { list ->
+                            while (reader.hasNext()) {
+                                list.add(CategoryTimeWarning.parse(reader))
+                            }
+
+                            timeWarnings = list
+                        }
+
+                        reader.endArray()
+                    }
                     else -> reader.skipValue()
                 }
             }
@@ -291,6 +315,7 @@ object DatabaseBackupLowlevel {
             if (userLoginLimitCategories.isNotEmpty()) { database.userLimitLoginCategoryDao().addItemsSync(userLoginLimitCategories) }
             if (categoryNetworkId.isNotEmpty()) { database.categoryNetworkId().insertItemsSync(categoryNetworkId) }
             if (childTasks.isNotEmpty()) { database.childTasks().insertItemsSync(childTasks) }
+            if (timeWarnings.isNotEmpty()) { database.timeWarning().insertItemsSync(timeWarnings) }
         }
     }
 }

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

@@ -0,0 +1,44 @@
+/*
+ * 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.*
+import io.timelimit.android.data.model.CategoryTimeWarning
+
+@Dao
+interface CategoryTimeWarningDao {
+    @Query("SELECT * FROM category_time_warning")
+    fun getAllItemsSync(): List<CategoryTimeWarning>
+
+    @Query("SELECT * FROM category_time_warning WHERE category_id = :categoryId")
+    fun getItemsByCategoryIdSync(categoryId: String): List<CategoryTimeWarning>
+
+    @Query("SELECT * FROM category_time_warning WHERE category_id = :categoryId")
+    fun getItemsByCategoryIdLive(categoryId: String): LiveData<List<CategoryTimeWarning>>
+
+    @Insert
+    fun insertItemsSync(items: List<CategoryTimeWarning>)
+
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
+    fun insertItemIgnoreConflictSync(item: CategoryTimeWarning)
+
+    @Query("DELETE FROM category_time_warning WHERE category_id = :categoryId AND minutes = :minutes")
+    fun deleteItem(categoryId: String, minutes: Int)
+
+    @Query("DELETE FROM category_time_warning WHERE category_id = :categoryId")
+    fun deleteByCategoryIdSync(categoryId: String)
+}

app/src/main/java/io/timelimit/android/data/invalidation/Tables.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
@@ -33,7 +33,8 @@ enum class Table {
     User,
     UserKey,
     UserLimitLoginCategory,
-    CategoryNetworkId
+    CategoryNetworkId,
+    CategoryTimeWarning
 }
 
 object TableNames {
@@ -54,6 +55,7 @@ object TableNames {
     const val USER_KEY = "user_key"
     const val USER_LIMIT_LOGIN_CATEGORY = "user_limit_login_category"
     const val CATEGORY_NETWORK_ID = "category_network_id"
+    const val CATEGORY_TIME_WARNING = "category_time_warning"
 }
 
 object TableUtil {
@@ -75,6 +77,7 @@ object TableUtil {
         Table.UserKey -> TableNames.USER_KEY
         Table.UserLimitLoginCategory -> TableNames.USER_LIMIT_LOGIN_CATEGORY
         Table.CategoryNetworkId -> TableNames.CATEGORY_NETWORK_ID
+        Table.CategoryTimeWarning -> TableNames.CATEGORY_TIME_WARNING
     }
 
     fun toEnum(value: String): Table = when (value) {
@@ -95,6 +98,7 @@ object TableUtil {
         TableNames.USER_KEY -> Table.UserKey
         TableNames.USER_LIMIT_LOGIN_CATEGORY -> Table.UserLimitLoginCategory
         TableNames.CATEGORY_NETWORK_ID -> Table.CategoryNetworkId
+        TableNames.CATEGORY_TIME_WARNING -> Table.CategoryTimeWarning
         else -> throw IllegalArgumentException()
     }
 }

app/src/main/java/io/timelimit/android/data/model/Category.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
@@ -263,15 +263,13 @@ data class Category(
 }
 
 object CategoryTimeWarnings {
-    val durationToBitIndex = mapOf(
+    val durationInMinutesToBitIndex = mapOf(
-            1000L * 60 to 0, // 1 minute
+        1 to 0,
-            1000L * 60 * 3 to 1, // 3 minutes
+        3 to 1,
-            1000L * 60 * 5 to 2, // 5 minutes
+        5 to 2,
-            1000L * 60 * 10 to 3, // 10 minutes
+        10 to 3,
-            1000L * 60 * 15 to 4 // 15 minutes
+        15 to 4
     )
-
-    val durations = durationToBitIndex.keys
 }
 
 object CategoryFlags {

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

@@ -0,0 +1,85 @@
+/*
+ * 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 android.util.JsonReader
+import android.util.JsonWriter
+import androidx.room.*
+import io.timelimit.android.data.IdGenerator
+import io.timelimit.android.data.JsonSerializable
+
+@Entity(
+    tableName = "category_time_warning",
+    primaryKeys = ["category_id", "minutes"],
+    foreignKeys = [
+        ForeignKey(
+            entity = Category::class,
+            parentColumns = ["id"],
+            childColumns = ["category_id"],
+            onUpdate = ForeignKey.CASCADE,
+            onDelete = ForeignKey.CASCADE
+        )
+    ]
+)
+data class CategoryTimeWarning (
+    @ColumnInfo(name = "category_id")
+    val categoryId: String,
+    val minutes: Int
+): JsonSerializable {
+    companion object {
+        private const val CATEGORY_ID = "categoryId"
+        private const val MINUTES = "minutes"
+        const val MIN = 1
+        const val MAX = 60 * 24 * 7 - 2
+
+        fun parse(reader: JsonReader): CategoryTimeWarning {
+            var categoryId: String? = null
+            var minutes: Int? = null
+
+            reader.beginObject()
+            while (reader.hasNext()) {
+                when (reader.nextName()) {
+                    CATEGORY_ID -> categoryId = reader.nextString()
+                    MINUTES -> minutes = reader.nextInt()
+                    else -> reader.skipValue()
+                }
+            }
+            reader.endObject()
+
+            return CategoryTimeWarning(
+                categoryId = categoryId!!,
+                minutes = minutes!!
+            )
+        }
+    }
+
+    init {
+        IdGenerator.assertIdValid(categoryId)
+
+        if (minutes < MIN || minutes > MAX) {
+            throw IllegalArgumentException()
+        }
+    }
+
+    override fun serialize(writer: JsonWriter) {
+        writer.beginObject()
+
+        writer.name(CATEGORY_ID).value(categoryId)
+        writer.name(MINUTES).value(minutes)
+
+        writer.endObject()
+    }
+}

app/src/main/java/io/timelimit/android/data/model/derived/CategoryRelatedData.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
@@ -25,7 +25,8 @@ data class CategoryRelatedData(
         val usedTimes: List<UsedTimeItem>,
         val durations: List<SessionDuration>,
         val networks: List<CategoryNetworkId>,
-        val limitLoginCategories: List<UserLimitLoginCategory>
+        val limitLoginCategories: List<UserLimitLoginCategory>,
+        val additionalTimeWarnings: List<CategoryTimeWarning>
 ) {
     companion object {
         fun load(category: Category, database: Database): CategoryRelatedData = database.runInUnobservedTransaction {
@@ -34,6 +35,7 @@ data class CategoryRelatedData(
             val durations = database.sessionDuration().getSessionDurationItemsByCategoryIdSync(category.id)
             val networks = database.categoryNetworkId().getByCategoryIdSync(category.id)
             val limitLoginCategories = database.userLimitLoginCategoryDao().getByCategoryIdSync(category.id)
+            val additionalTimeWarnings = database.timeWarning().getItemsByCategoryIdSync(category.id)
 
             CategoryRelatedData(
                     category = category,
@@ -41,11 +43,24 @@ data class CategoryRelatedData(
                     usedTimes = usedTimes,
                     durations = durations,
                     networks = networks,
-                    limitLoginCategories = limitLoginCategories
+                    limitLoginCategories = limitLoginCategories,
+                    additionalTimeWarnings = additionalTimeWarnings
             )
         }
     }
 
+    val allTimeWarningMinutes: Set<Int> by lazy {
+        mutableSetOf<Int>().also { result ->
+            CategoryTimeWarnings.durationInMinutesToBitIndex.entries.forEach { (durationInMinutes, bitIndex) ->
+                if (category.timeWarnings and (1 shl bitIndex) != 0) {
+                    result.add(durationInMinutes)
+                }
+            }
+
+            additionalTimeWarnings.forEach { result.add(it.minutes) }
+        }
+    }
+
     fun update(
             category: Category,
             updateRules: Boolean,
@@ -53,6 +68,7 @@ data class CategoryRelatedData(
             updateDurations: Boolean,
             updateNetworks: Boolean,
             updateLimitLoginCategories: Boolean,
+            updateTimeWarnings: Boolean,
             database: Database
     ): CategoryRelatedData = database.runInUnobservedTransaction {
         if (category.id != this.category.id) {
@@ -64,10 +80,12 @@ data class CategoryRelatedData(
         val durations = if (updateDurations) database.sessionDuration().getSessionDurationItemsByCategoryIdSync(category.id) else durations
         val networks = if (updateNetworks) database.categoryNetworkId().getByCategoryIdSync(category.id) else networks
         val limitLoginCategories = if (updateLimitLoginCategories) database.userLimitLoginCategoryDao().getByCategoryIdSync(category.id) else limitLoginCategories
+        val additionalTimeWarnings = if (updateTimeWarnings) database.timeWarning().getItemsByCategoryIdSync(category.id) else additionalTimeWarnings
 
         if (
                 category == this.category && rules == this.rules && usedTimes == this.usedTimes &&
-                durations == this.durations && networks == this.networks && limitLoginCategories == this.limitLoginCategories
+                durations == this.durations && networks == this.networks &&
+                limitLoginCategories == this.limitLoginCategories && additionalTimeWarnings == this.additionalTimeWarnings
         ) {
             this
         } else {
@@ -77,7 +95,8 @@ data class CategoryRelatedData(
                     usedTimes = usedTimes,
                     durations = durations,
                     networks = networks,
-                    limitLoginCategories = limitLoginCategories
+                    limitLoginCategories = limitLoginCategories,
+                    additionalTimeWarnings = additionalTimeWarnings
             )
         }
     }

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

@@ -39,7 +39,7 @@ data class UserRelatedData(
         private val relatedTables = arrayOf(
                 Table.User, Table.Category, Table.TimeLimitRule,
                 Table.UsedTimeItem, Table.SessionDuration, Table.CategoryApp,
-                Table.CategoryNetworkId
+                Table.CategoryNetworkId, Table.UserLimitLoginCategory, Table.CategoryTimeWarning
         )
 
         fun load(user: User, database: Database): UserRelatedData = database.runInUnobservedTransaction {
@@ -103,11 +103,12 @@ data class UserRelatedData(
     private var categoryAppsInvalidated = false
     private var categoryNetworksInvalidated = false
     private var limitLoginCategoriesInvalidated = false
+    private var timeWarningsInvalidated = false
 
     private val invalidated
         get() = userInvalidated || categoriesInvalidated || rulesInvalidated || usedTimesInvalidated ||
                 sessionDurationsInvalidated || categoryAppsInvalidated || categoryNetworksInvalidated ||
-                limitLoginCategoriesInvalidated
+                limitLoginCategoriesInvalidated || timeWarningsInvalidated
 
     override fun onInvalidated(tables: Set<Table>) {
         tables.forEach {
@@ -120,6 +121,7 @@ data class UserRelatedData(
                 Table.CategoryApp -> categoryAppsInvalidated = true
                 Table.CategoryNetworkId -> categoryNetworksInvalidated = true
                 Table.UserLimitLoginCategory -> limitLoginCategoriesInvalidated = true
+                Table.CategoryTimeWarning -> timeWarningsInvalidated = true
                 else -> {/* do nothing */}
             }
         }
@@ -144,13 +146,17 @@ data class UserRelatedData(
                         updateRules = rulesInvalidated,
                         updateTimes = usedTimesInvalidated,
                         updateNetworks = categoryNetworksInvalidated,
-                        updateLimitLoginCategories = limitLoginCategoriesInvalidated
+                        updateLimitLoginCategories = limitLoginCategoriesInvalidated,
+                        updateTimeWarnings = timeWarningsInvalidated
                 ) ?: CategoryRelatedData.load(
                         category = category,
                         database = database
                 )
             }
-        } else if (sessionDurationsInvalidated || rulesInvalidated || usedTimesInvalidated || categoryNetworksInvalidated || limitLoginCategoriesInvalidated) {
+        } else if (
+            sessionDurationsInvalidated || rulesInvalidated || usedTimesInvalidated ||
+            categoryNetworksInvalidated || limitLoginCategoriesInvalidated || timeWarningsInvalidated
+        ) {
             categories.map {
                 it.update(
                         category = it.category,
@@ -159,7 +165,8 @@ data class UserRelatedData(
                         updateRules = rulesInvalidated,
                         updateTimes = usedTimesInvalidated,
                         updateNetworks = categoryNetworksInvalidated,
-                        updateLimitLoginCategories = limitLoginCategoriesInvalidated
+                        updateLimitLoginCategories = limitLoginCategoriesInvalidated,
+                        updateTimeWarnings = timeWarningsInvalidated
                 )
             }
         } else {

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

@@ -25,7 +25,6 @@ import io.timelimit.android.coroutines.executeAndWait
 import io.timelimit.android.coroutines.runAsync
 import io.timelimit.android.coroutines.runAsyncExpectForever
 import io.timelimit.android.data.backup.DatabaseBackup
-import io.timelimit.android.data.model.CategoryTimeWarnings
 import io.timelimit.android.data.model.ExperimentalFlags
 import io.timelimit.android.data.model.UserType
 import io.timelimit.android.data.model.derived.UserRelatedData
@@ -46,7 +45,6 @@ import io.timelimit.android.logic.blockingreason.needsNetworkId
 import io.timelimit.android.sync.actions.ForceSyncAction
 import io.timelimit.android.sync.actions.UpdateDeviceStatusAction
 import io.timelimit.android.sync.actions.apply.ApplyActionUtil
-import io.timelimit.android.ui.IsAppInForeground
 import io.timelimit.android.ui.lock.LockActivity
 import io.timelimit.android.util.AndroidVersion
 import io.timelimit.android.util.TimeTextUtil
@@ -393,33 +391,50 @@ class BackgroundTaskLogic(val appLogic: AppLogic) {
                         val oldSessionDuration = handling.remainingSessionDuration?.let { it - timeToSubtractForCategory }
 
                         // trigger time warnings
-                        fun showTimeWarningNotification(title: Int, roundedNewTime: Long) {
+                        fun handleTimeWarnings(
-                            appLogic.platformIntegration.showTimeWarningNotification(
+                            notificationTitleStringResource: Int,
-                                    title = appLogic.context.getString(title, category.title),
+                            roundedNewTimeInMilliseconds: Long
-                                    text = TimeTextUtil.remaining(roundedNewTime.toInt(), appLogic.context)
+                        ) {
-                            )
+                            val roundedNewTimeInMinutes = roundedNewTimeInMilliseconds / (1000 * 60)
+
+                            if (
+                            // CategoryTimeWarning.MAX is still small enough for an integer
+                                roundedNewTimeInMilliseconds >= 0 &&
+                                roundedNewTimeInMilliseconds < Int.MAX_VALUE &&
+                                roundedNewTimeInMinutes >= 0 &&
+                                roundedNewTimeInMinutes < Int.MAX_VALUE &&
+                                handling.createdWithCategoryRelatedData.allTimeWarningMinutes.contains(
+                                    roundedNewTimeInMinutes.toInt()
+                                )
+                            ) {
+                                appLogic.platformIntegration.showTimeWarningNotification(
+                                    title = appLogic.context.getString(
+                                        notificationTitleStringResource,
+                                        category.title
+                                    ),
+                                    text = TimeTextUtil.remaining(
+                                        roundedNewTimeInMilliseconds.toInt(),
+                                        appLogic.context
+                                    )
+                                )
+                            }
                         }
 
                         if (oldRemainingTime / (1000 * 60) != newRemainingTime / (1000 * 60)) {
-                            // eventually show remaining time warning
+                            handleTimeWarnings(
-                            val roundedNewTime = ((newRemainingTime / (1000 * 60)) + 1) * (1000 * 60)
+                                notificationTitleStringResource = R.string.time_warning_not_title,
-                            val flagIndex = CategoryTimeWarnings.durationToBitIndex[roundedNewTime]
+                                roundedNewTimeInMilliseconds = ((newRemainingTime / (1000 * 60)) + 1) * 1000 * 60
-
+                            )
-                            if (flagIndex != null && category.timeWarnings and (1 shl flagIndex) != 0) {
-                                showTimeWarningNotification(title = R.string.time_warning_not_title, roundedNewTime = roundedNewTime)
-                            }
                         }
 
                         if (oldSessionDuration != null) {
                             val newSessionDuration = oldSessionDuration - timeToSubtract
-                            // eventually show session duration warning
-                            if (oldSessionDuration / (1000 * 60) != newSessionDuration / (1000 * 60)) {
-                                val roundedNewTime = ((newSessionDuration / (1000 * 60)) + 1) * (1000 * 60)
-                                val flagIndex = CategoryTimeWarnings.durationToBitIndex[roundedNewTime]
 
-                                if (flagIndex != null && category.timeWarnings and (1 shl flagIndex) != 0) {
+                            if (oldSessionDuration / (1000 * 60) != newSessionDuration / (1000 * 60)) {
-                                    showTimeWarningNotification(title = R.string.time_warning_not_title_session, roundedNewTime = roundedNewTime)
+                                handleTimeWarnings(
-                                }
+                                    notificationTitleStringResource = R.string.time_warning_not_title_session,
+                                    roundedNewTimeInMilliseconds = ((newSessionDuration / (1000 * 60)) + 1) * (1000 * 60)
+                                )
                             }
                         }
 
@@ -434,12 +449,11 @@ class BackgroundTaskLogic(val appLogic: AppLogic) {
 
                             if (nextBlockedMinute != null) {
                                 val minutesUntilNextBlockedMinute = nextBlockedMinute - nowMinuteOfWeek
-                                val msUntilNextBlocking = minutesUntilNextBlockedMinute.toLong() * 1000 * 60
-                                val flagIndex = CategoryTimeWarnings.durationToBitIndex[msUntilNextBlocking]
 
-                                if (flagIndex != null && category.timeWarnings and (1 shl flagIndex) != 0) {
+                                handleTimeWarnings(
-                                    showTimeWarningNotification(title = R.string.time_warning_not_title_blocked_time_area, roundedNewTime = msUntilNextBlocking)
+                                    notificationTitleStringResource = R.string.time_warning_not_title_blocked_time_area,
-                                }
+                                    roundedNewTimeInMilliseconds = minutesUntilNextBlockedMinute.toLong() * 1000 * 60
+                                )
                             }
                         }
 

app/src/main/java/io/timelimit/android/sync/ApplyServerDataStatus.kt

@@ -387,6 +387,20 @@ object ApplyServerDataStatus {
                                     }
                             )
                         }
+
+                        // apply time warnings
+                        database.timeWarning().deleteByCategoryIdSync(newCategory.categoryId)
+
+                        if (newCategory.additionalTimeWarnings.isNotEmpty()) {
+                            database.timeWarning().insertItemsSync(
+                                newCategory.additionalTimeWarnings.map { minutes ->
+                                    CategoryTimeWarning(
+                                        categoryId = newCategory.categoryId,
+                                        minutes = minutes
+                                    )
+                                }
+                            )
+                        }
                     }
                 }
             }

app/src/main/java/io/timelimit/android/sync/actions/Actions.kt

@@ -726,16 +726,28 @@ data class UpdateCategoryTemporarilyBlockedAction(val categoryId: String, val bl
         writer.endObject()
     }
 }
-data class UpdateCategoryTimeWarningsAction(val categoryId: String, val enable: Boolean, val flags: Int): ParentAction() {
+data class UpdateCategoryTimeWarningsAction(
+    val categoryId: String,
+    val enable: Boolean,
+    val flags: Int,
+    val minutes: Int?
+): ParentAction() {
     companion object {
         const val TYPE_VALUE = "UPDATE_CATEGORY_TIME_WARNINGS"
         private const val CATEGORY_ID = "categoryId"
         private const val ENABLE = "enable"
         private const val FLAGS = "flags"
+        private const val MINUTES = "minutes"
     }
 
     init {
         IdGenerator.assertIdValid(categoryId)
+
+        if (minutes != null) {
+            if (minutes < CategoryTimeWarning.MIN || minutes > CategoryTimeWarning.MAX) {
+                throw IllegalArgumentException()
+            }
+        }
     }
 
     override fun serialize(writer: JsonWriter) {
@@ -746,6 +758,10 @@ data class UpdateCategoryTimeWarningsAction(val categoryId: String, val enable:
         writer.name(ENABLE).value(enable)
         writer.name(FLAGS).value(flags)
 
+        if (minutes != null) {
+            writer.name(MINUTES).value(minutes)
+        }
+
         writer.endObject()
     }
 }

app/src/main/java/io/timelimit/android/sync/actions/dispatch/ParentAction.kt

@@ -686,6 +686,19 @@ object LocalDatabaseParentActionDispatcher {
                         database.category().updateCategorySync(modified)
                     }
 
+                    if (action.minutes != null) {
+                        if (action.enable) database.timeWarning().insertItemIgnoreConflictSync(
+                            CategoryTimeWarning(
+                                categoryId = action.categoryId,
+                                minutes = action.minutes
+                            )
+                        )
+                        else database.timeWarning().deleteItem(
+                            categoryId = action.categoryId,
+                            minutes = action.minutes
+                        )
+                    }
+
                     null
                 }
                 is UpdateCategoryBatteryLimit -> {

app/src/main/java/io/timelimit/android/sync/network/ServerDataStatus.kt

@@ -459,7 +459,8 @@ data class ServerUpdatedCategoryBaseData(
         val networks: List<ServerCategoryNetworkId>,
         val disableLimitsUntil: Long,
         val flags: Long,
-        val blockNotificationDelay: Long
+        val blockNotificationDelay: Long,
+        val additionalTimeWarnings: Set<Int>
 ) {
     companion object {
         private const val CATEGORY_ID = "categoryId"
@@ -481,6 +482,7 @@ data class ServerUpdatedCategoryBaseData(
         private const val DISABLE_LIMITS_UNTIL = "dlu"
         private const val FLAGS = "flags"
         private const val BLOCK_NOTIFICATION_DELAY = "blockNotificationDelay"
+        private const val ADDITIONAL_TIME_WARNINGS = "atw"
 
         fun parse(reader: JsonReader): ServerUpdatedCategoryBaseData {
             var categoryId: String? = null
@@ -503,6 +505,7 @@ data class ServerUpdatedCategoryBaseData(
             var disableLimitsUntil = 0L
             var flags = 0L
             var blockNotificationDelay = 0L
+            var additionalTimeWarnings = emptySet<Int>()
 
             reader.beginObject()
             while (reader.hasNext()) {
@@ -526,31 +529,41 @@ data class ServerUpdatedCategoryBaseData(
                     DISABLE_LIMITS_UNTIL -> disableLimitsUntil = reader.nextLong()
                     FLAGS -> flags = reader.nextLong()
                     BLOCK_NOTIFICATION_DELAY -> blockNotificationDelay = reader.nextLong()
+                    ADDITIONAL_TIME_WARNINGS -> additionalTimeWarnings = mutableSetOf<Int>().also { result ->
+                        reader.beginArray()
+
+                        while (reader.hasNext()) {
+                            result.add(reader.nextInt())
+                        }
+
+                        reader.endArray()
+                    }
                     else -> reader.skipValue()
                 }
             }
             reader.endObject()
 
             return ServerUpdatedCategoryBaseData(
-                    categoryId = categoryId!!,
+                categoryId = categoryId!!,
-                    childId = childId!!,
+                childId = childId!!,
-                    title = title!!,
+                title = title!!,
-                    blockedMinutesInWeek = blockedMinutesInWeek!!,
+                blockedMinutesInWeek = blockedMinutesInWeek!!,
-                    extraTimeInMillis = extraTimeInMillis!!,
+                extraTimeInMillis = extraTimeInMillis!!,
-                    extraTimeDay = extraTimeDay,
+                extraTimeDay = extraTimeDay,
-                    temporarilyBlocked = temporarilyBlocked!!,
+                temporarilyBlocked = temporarilyBlocked!!,
-                    temporarilyBlockedEndTime = temporarilyBlockedEndTime,
+                temporarilyBlockedEndTime = temporarilyBlockedEndTime,
-                    baseDataVersion = baseDataVersion!!,
+                baseDataVersion = baseDataVersion!!,
-                    parentCategoryId = parentCategoryId!!,
+                parentCategoryId = parentCategoryId!!,
-                    blockAllNotifications = blockAllNotifications,
+                blockAllNotifications = blockAllNotifications,
-                    timeWarnings = timeWarnings,
+                timeWarnings = timeWarnings,
-                    minBatteryLevelCharging = minBatteryLevelCharging,
+                minBatteryLevelCharging = minBatteryLevelCharging,
-                    minBatteryLevelMobile = minBatteryLevelMobile,
+                minBatteryLevelMobile = minBatteryLevelMobile,
-                    sort = sort,
+                sort = sort,
-                    networks = networks,
+                networks = networks,
-                    disableLimitsUntil = disableLimitsUntil,
+                disableLimitsUntil = disableLimitsUntil,
-                    flags = flags,
+                flags = flags,
-                    blockNotificationDelay = blockNotificationDelay
+                blockNotificationDelay = blockNotificationDelay,
+                additionalTimeWarnings = additionalTimeWarnings
             )
         }
 

app/src/main/java/io/timelimit/android/ui/manage/category/settings/CategorySettingsFragment.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
@@ -23,6 +23,7 @@ import android.view.ViewGroup
 import android.widget.Toast
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.Observer
 import com.google.android.material.snackbar.Snackbar
 import io.timelimit.android.R
@@ -38,6 +39,8 @@ import io.timelimit.android.ui.main.ActivityViewModel
 import io.timelimit.android.ui.main.getActivityViewModel
 import io.timelimit.android.ui.manage.category.settings.addusedtime.AddUsedTimeDialogFragment
 import io.timelimit.android.ui.manage.category.settings.networks.ManageCategoryNetworksView
+import io.timelimit.android.ui.manage.category.settings.timewarning.CategoryTimeWarningStatus
+import io.timelimit.android.ui.manage.category.settings.timewarning.CategoryTimeWarningView
 import io.timelimit.android.ui.payment.RequiresPurchaseDialogFragment
 import io.timelimit.android.ui.util.bind
 
@@ -46,6 +49,7 @@ class CategorySettingsFragment : Fragment() {
         private const val PERMISSION_REQUEST_CODE = 1
         private const val CHILD_ID = "childId"
         private const val CATEGORY_ID = "categoryId"
+        private const val TIME_WARNING_STATUS = "timeWarningStatus"
 
         fun newInstance(childId: String, categoryId: String) = CategorySettingsFragment().apply {
             arguments = Bundle().apply {
@@ -61,10 +65,35 @@ class CategorySettingsFragment : Fragment() {
     private val categoryId: String get() = requireArguments().getString(CATEGORY_ID)!!
     private val notificationFilterModel: ManageNotificationFilterModel by viewModels()
 
+    private val timeWarningStatus = MutableLiveData<CategoryTimeWarningStatus>()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        timeWarningStatus.value = savedInstanceState?.getParcelable(TIME_WARNING_STATUS) ?: CategoryTimeWarningStatus.default
+    }
+
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         val binding = FragmentCategorySettingsBinding.inflate(inflater, container, false)
 
         val categoryEntry = appLogic.database.category().getCategoryByChildIdAndId(childId, categoryId)
+        val timeWarnings = appLogic.database.timeWarning().getItemsByCategoryIdLive(categoryId)
+
+        categoryEntry.observe(viewLifecycleOwner) {
+            if (it != null) {
+                timeWarningStatus.value?.let { old ->
+                    timeWarningStatus.value = old.update(it)
+                }
+            }
+        }
+
+        timeWarnings.observe(viewLifecycleOwner) {
+            if (it != null) {
+                timeWarningStatus.value?.let { old ->
+                    timeWarningStatus.value = old.update(it)
+                }
+            }
+        }
 
         val childDate = appLogic.database.user().getChildUserByIdLive(childId).mapToTimezone().switchMap { timezone ->
             liveDataFromFunction (1000 * 10L) { DateInTimezone.newInstance(appLogic.timeApi.getCurrentTimeInMillis(), timezone) }
@@ -122,11 +151,13 @@ class CategorySettingsFragment : Fragment() {
         )
 
         CategoryTimeWarningView.bind(
-                view = binding.timeWarnings,
+            view = binding.timeWarnings,
-                auth = auth,
+            auth = auth,
-                categoryLive = categoryEntry,
+            statusLive = timeWarningStatus,
-                lifecycleOwner = this,
+            lifecycleOwner = this,
-                fragmentManager = parentFragmentManager
+            fragmentManager = parentFragmentManager,
+            categoryId = categoryId,
+            serverApiLevelInfo = appLogic.serverApiLevelLogic.infoLive
         )
 
         ManageCategoryNetworksView.bind(
@@ -254,4 +285,10 @@ class CategorySettingsFragment : Fragment() {
             }
         }
     }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+
+        timeWarningStatus.value?.let { outState.putParcelable(TIME_WARNING_STATUS, it) }
+    }
 }

app/src/main/java/io/timelimit/android/ui/manage/category/settings/CategoryTimeWarningView.kt

@@ -1,86 +0,0 @@
-/*
- * TimeLimit Copyright <C> 2019 - 2020 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.manage.category.settings
-
-import android.widget.CheckBox
-import androidx.fragment.app.FragmentManager
-import androidx.lifecycle.LifecycleOwner
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.Observer
-import io.timelimit.android.R
-import io.timelimit.android.data.model.Category
-import io.timelimit.android.data.model.CategoryTimeWarnings
-import io.timelimit.android.databinding.CategoryTimeWarningsViewBinding
-import io.timelimit.android.sync.actions.UpdateCategoryTimeWarningsAction
-import io.timelimit.android.ui.help.HelpDialogFragment
-import io.timelimit.android.ui.main.ActivityViewModel
-import io.timelimit.android.util.TimeTextUtil
-
-object CategoryTimeWarningView {
-    fun bind(
-            view: CategoryTimeWarningsViewBinding,
-            lifecycleOwner: LifecycleOwner,
-            categoryLive: LiveData<Category?>,
-            auth: ActivityViewModel,
-            fragmentManager: FragmentManager
-    ) {
-        view.titleView.setOnClickListener {
-            HelpDialogFragment.newInstance(
-                    title = R.string.time_warning_title,
-                    text = R.string.time_warning_desc
-            ).show(fragmentManager)
-        }
-
-        view.linearLayout.removeAllViews()
-
-        val durationToCheckbox = mutableMapOf<Long, CheckBox>()
-
-        CategoryTimeWarnings.durations.sorted().forEach { duration ->
-            CheckBox(view.root.context).let { checkbox ->
-                checkbox.text = TimeTextUtil.time(duration.toInt(), view.root.context)
-
-                view.linearLayout.addView(checkbox)
-                durationToCheckbox[duration] = checkbox
-            }
-        }
-
-        categoryLive.observe(lifecycleOwner, Observer { category ->
-            durationToCheckbox.entries.forEach { (duration, checkbox) ->
-                checkbox.setOnCheckedChangeListener { _, _ ->  }
-
-                val flag = (1 shl CategoryTimeWarnings.durationToBitIndex[duration]!!)
-                val enable = (category?.timeWarnings ?: 0) and flag != 0
-                checkbox.isChecked = enable
-
-                checkbox.setOnCheckedChangeListener { _, isChecked ->
-                    if (isChecked != enable && category != null) {
-                        if (auth.tryDispatchParentAction(
-                                        UpdateCategoryTimeWarningsAction(
-                                                categoryId = category.id,
-                                                enable = isChecked,
-                                                flags = flag
-                                        )
-                                )) {
-                            // it worked
-                        } else {
-                            checkbox.isChecked = enable
-                        }
-                    }
-                }
-            }
-        })
-    }
-}

app/src/main/java/io/timelimit/android/ui/manage/category/settings/timewarning/AddTimeWarningDialogFragment.kt

@@ -0,0 +1,81 @@
+/*
+ * 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.manage.category.settings.timewarning
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.FragmentManager
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment
+import io.timelimit.android.data.model.CategoryTimeWarning
+import io.timelimit.android.data.model.CategoryTimeWarnings
+import io.timelimit.android.databinding.AddTimeWarningDialogBinding
+import io.timelimit.android.extensions.showSafe
+import io.timelimit.android.sync.actions.UpdateCategoryTimeWarningsAction
+import io.timelimit.android.ui.main.ActivityViewModelHolder
+
+class AddTimeWarningDialogFragment: BottomSheetDialogFragment() {
+    companion object {
+        private const val DIALOG_TAG = "AddTimeWarningDialogFragment"
+        private const val CATEGORY_ID = "categoryId"
+
+        fun newInstance(categoryId: String) = AddTimeWarningDialogFragment().apply {
+            arguments = Bundle().apply {
+                putString(CATEGORY_ID, categoryId)
+            }
+        }
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
+        val binding = AddTimeWarningDialogBinding.inflate(inflater, container, false)
+        val categoryId = requireArguments().getString(CATEGORY_ID)!!
+        val auth = (requireActivity() as ActivityViewModelHolder).getActivityViewModel()
+
+        auth.authenticatedUser.observe(viewLifecycleOwner) { if (it == null) dismissAllowingStateLoss() }
+
+        binding.numberPicker.minValue = CategoryTimeWarning.MIN
+        binding.numberPicker.maxValue = CategoryTimeWarning.MAX
+
+        binding.confirmButton.setOnClickListener {
+            val minutes = binding.numberPicker.value
+            val flagIndex = CategoryTimeWarnings.durationInMinutesToBitIndex[minutes]
+            val action = if (flagIndex != null) {
+                UpdateCategoryTimeWarningsAction(
+                    categoryId = categoryId,
+                    enable = true,
+                    flags = 1 shl flagIndex,
+                    minutes = null
+                )
+            } else {
+                UpdateCategoryTimeWarningsAction(
+                    categoryId = categoryId,
+                    enable = true,
+                    flags = 0,
+                    minutes = minutes
+                )
+            }
+
+            if (auth.tryDispatchParentAction(action)) {
+                dismissAllowingStateLoss()
+            }
+        }
+
+        return binding.root
+    }
+
+    fun show(fragmentManager: FragmentManager) = showSafe(fragmentManager, DIALOG_TAG)
+}

app/src/main/java/io/timelimit/android/ui/manage/category/settings/timewarning/CategoryTimeWarningStatus.kt

@@ -0,0 +1,118 @@
+/*
+ * 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.manage.category.settings.timewarning
+
+import android.os.Parcelable
+import io.timelimit.android.data.model.Category
+import io.timelimit.android.data.model.CategoryTimeWarning
+import io.timelimit.android.data.model.CategoryTimeWarnings
+import io.timelimit.android.sync.actions.UpdateCategoryTimeWarningsAction
+import kotlinx.parcelize.IgnoredOnParcel
+import kotlinx.parcelize.Parcelize
+import java.util.*
+
+@Parcelize
+data class CategoryTimeWarningStatus(
+    private val categoryFlags: Int?,
+    private val timeWarnings: Set<Int>?,
+    private val additionalTimeWarningSlots: Set<Int>
+): Parcelable {
+    companion object {
+        val default = CategoryTimeWarningStatus(
+            categoryFlags = null,
+            timeWarnings = null,
+            additionalTimeWarningSlots = emptySet()
+        )
+    }
+
+    fun update(category: Category): CategoryTimeWarningStatus {
+        if (this.categoryFlags == category.timeWarnings) return this
+
+        return this.copy(categoryFlags = category.timeWarnings)
+    }
+
+    fun update(warnings: List<CategoryTimeWarning>): CategoryTimeWarningStatus {
+        val timeWarnings = warnings.map { it.minutes }.toSet()
+
+        if (this.timeWarnings == timeWarnings) return this
+
+        return this.copy(
+            timeWarnings = timeWarnings,
+            additionalTimeWarningSlots = additionalTimeWarningSlots + timeWarnings
+        )
+    }
+
+    fun buildAction(categoryId: String, minutes: Int, enable: Boolean): UpdateCategoryTimeWarningsAction {
+        val flagIndex = CategoryTimeWarnings.durationInMinutesToBitIndex[minutes]
+
+        return if (enable) {
+            if (flagIndex != null) UpdateCategoryTimeWarningsAction(
+                categoryId = categoryId,
+                enable = true,
+                flags = 1 shl flagIndex,
+                minutes = null
+            ) else UpdateCategoryTimeWarningsAction(
+                categoryId = categoryId,
+                enable = true,
+                flags = 0,
+                minutes = minutes
+            )
+        } else {
+            UpdateCategoryTimeWarningsAction(
+                categoryId = categoryId,
+                enable = false,
+                flags = if (flagIndex != null) 1 shl flagIndex else 0,
+                minutes = if (timeWarnings != null && timeWarnings.contains(minutes)) minutes else null
+            )
+        }
+    }
+
+    @IgnoredOnParcel
+    val display = TreeMap<Int, CategoryTimeWarningOptionStatus>().also { result ->
+        val complete = categoryFlags != null && timeWarnings != null
+
+        additionalTimeWarningSlots.forEach { minute ->
+            result[minute] = if (complete) CategoryTimeWarningOptionStatus.Unchecked
+            else CategoryTimeWarningOptionStatus.Undefined
+        }
+
+        timeWarnings?.forEach { minute -> result[minute] = CategoryTimeWarningOptionStatus.Checked }
+
+        CategoryTimeWarnings.durationInMinutesToBitIndex.forEach { (minute, bitIndex) ->
+            result[minute] = if (complete && categoryFlags != null) {
+                if (categoryFlags and (1 shl bitIndex) != 0) CategoryTimeWarningOptionStatus.Checked
+                else CategoryTimeWarningOptionStatus.Unchecked
+            } else CategoryTimeWarningOptionStatus.Undefined
+        }
+    }.let { output ->
+        mutableListOf<CategoryTimeWarningOption>().also { result ->
+            output.entries.forEach { (minute, status) ->
+                result.add(CategoryTimeWarningOption(minute, status))
+            }
+        }
+    }.toList()
+
+    data class CategoryTimeWarningOption(
+        val minutes: Int,
+        val status: CategoryTimeWarningOptionStatus
+    )
+
+    enum class CategoryTimeWarningOptionStatus {
+        Checked,
+        Unchecked,
+        Undefined
+    }
+}

app/src/main/java/io/timelimit/android/ui/manage/category/settings/timewarning/CategoryTimeWarningView.kt

@@ -0,0 +1,105 @@
+/*
+ * 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.manage.category.settings.timewarning
+
+import android.view.View
+import android.widget.CheckBox
+import androidx.fragment.app.FragmentManager
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LiveData
+import io.timelimit.android.R
+import io.timelimit.android.databinding.CategoryTimeWarningsViewBinding
+import io.timelimit.android.logic.ServerApiLevelInfo
+import io.timelimit.android.ui.help.HelpDialogFragment
+import io.timelimit.android.ui.main.ActivityViewModel
+import io.timelimit.android.util.TimeTextUtil
+
+object CategoryTimeWarningView {
+    fun bind(
+        view: CategoryTimeWarningsViewBinding,
+        lifecycleOwner: LifecycleOwner,
+        statusLive: LiveData<CategoryTimeWarningStatus>,
+        auth: ActivityViewModel,
+        fragmentManager: FragmentManager,
+        categoryId: String,
+        serverApiLevelInfo: LiveData<ServerApiLevelInfo>
+    ) {
+        view.titleView.setOnClickListener {
+            HelpDialogFragment.newInstance(
+                title = R.string.time_warning_title,
+                text = R.string.time_warning_desc
+            ).show(fragmentManager)
+        }
+
+        view.addTimeWarningButton.setOnClickListener {
+            if (auth.requestAuthenticationOrReturnTrue()) {
+                AddTimeWarningDialogFragment.newInstance(categoryId).show(fragmentManager)
+            }
+        }
+
+        serverApiLevelInfo.observe(lifecycleOwner) { info ->
+            view.addTimeWarningButton.visibility = if (info.hasLevelOrIsOffline(3)) View.VISIBLE else View.GONE
+        }
+
+        view.linearLayout.removeAllViews()
+
+        val views = mutableListOf<CheckBox>()
+
+        statusLive.observe(lifecycleOwner) { status ->
+            if (views.size != status.display.size) {
+                views.clear()
+                view.linearLayout.removeAllViews()
+
+                for (index in 1..status.display.size) {
+                    CheckBox(view.root.context).also { checkbox ->
+                        views.add(checkbox)
+                        view.linearLayout.addView(checkbox)
+                    }
+                }
+            }
+
+            status.display.forEachIndexed { index, item ->
+                val checkbox = views[index]
+
+                val enabled = item.status != CategoryTimeWarningStatus.CategoryTimeWarningOptionStatus.Undefined
+                val checked = item.status == CategoryTimeWarningStatus.CategoryTimeWarningOptionStatus.Checked
+
+                checkbox.text = TimeTextUtil.time(item.minutes * 1000 * 60, view.root.context)
+
+                checkbox.setOnCheckedChangeListener(null)
+
+                checkbox.isEnabled = enabled
+                checkbox.isChecked = checked
+
+                if (item.status != CategoryTimeWarningStatus.CategoryTimeWarningOptionStatus.Undefined) {
+                    checkbox.setOnCheckedChangeListener { _, isChecked ->
+                        if (isChecked != checked) {
+                            if (auth.tryDispatchParentAction(status.buildAction(
+                                    categoryId = categoryId,
+                                    minutes = item.minutes,
+                                    enable = isChecked
+                            ))) {
+                                // it worked
+                            } else {
+                                checkbox.isChecked = checked
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/io/timelimit/android/ui/manage/child/advanced/duplicate/DuplicateChildActions.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
@@ -89,13 +89,23 @@ object DuplicateChildActions {
                 oldCategory.category.timeWarnings.let { timeWarnings ->
                     if (timeWarnings != 0) {
                         result.add(UpdateCategoryTimeWarningsAction(
-                                categoryId = newCategoryId,
+                            categoryId = newCategoryId,
-                                enable = true,
+                            enable = true,
-                                flags = timeWarnings
+                            flags = timeWarnings,
+                            minutes = null
                         ))
                     }
                 }
 
+                oldCategory.additionalTimeWarnings.forEach { timeWarning ->
+                    result.add(UpdateCategoryTimeWarningsAction(
+                        categoryId = newCategoryId,
+                        enable = true,
+                        flags = 0,
+                        minutes = timeWarning.minutes
+                    ))
+                }
+
                 if (oldCategory.category.minBatteryLevelWhileCharging != 0 || oldCategory.category.minBatteryLevelMobile != 0) {
                     result.add(UpdateCategoryBatteryLimit(
                             categoryId = newCategoryId,

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

@@ -0,0 +1,60 @@
+<?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/>.
+-->
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <LinearLayout
+        android:orientation="vertical"
+        android:padding="8dp"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:textAppearance="?android:textAppearanceLarge"
+            android:text="@string/time_warning_custom_add"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+        <LinearLayout
+            android:orientation="horizontal"
+            android:layout_gravity="center_horizontal"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content">
+
+            <NumberPicker
+                android:id="@+id/number_picker"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content" />
+
+            <TextView
+                android:paddingStart="8dp"
+                android:paddingEnd="0dp"
+                android:textAppearance="?android:textAppearanceMedium"
+                android:layout_gravity="center_vertical"
+                android:text="@string/select_time_span_view_minutes"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content" />
+
+        </LinearLayout>
+
+        <Button
+            android:id="@+id/confirm_button"
+            android:text="@string/generic_ok"
+            android:layout_gravity="end"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content" />
+
+    </LinearLayout>
+</layout>

app/src/main/res/layout/category_time_warnings_view.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.
@@ -45,6 +45,14 @@
                 <!-- checkboxes will be added hear -->
             </LinearLayout>
 
+            <Button
+                style="?materialButtonOutlinedStyle"
+                android:layout_gravity="end"
+                android:text="@string/time_warning_custom_add"
+                android:id="@+id/add_time_warning_button"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content" />
+
         </LinearLayout>
     </androidx.cardview.widget.CardView>
 </layout>

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

@@ -1123,6 +1123,7 @@
 
     <string name="notification_channel_time_warning_title">Zeitwarnungen</string>
     <string name="notification_channel_time_warning_text">Benachrichtigungen für Kinder, wenn nur noch wenig Zeit übrig ist</string>
+    <string name="time_warning_custom_add">Zeitwarnung hinzufügen</string>
 
     <string name="notification_channel_premium_expires_title">Vollversionablauf</string>
     <string name="notification_channel_premium_expires_text">Benachrichtigungen, wenn die Vollversion bald abläuft</string>

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

@@ -1168,6 +1168,7 @@
 
     <string name="notification_channel_time_warning_title">Time warning</string>
     <string name="notification_channel_time_warning_text">Notification for childs if there is not much time remaining</string>
+    <string name="time_warning_custom_add">Add time warning</string>
 
     <string name="notification_channel_premium_expires_title">Premium version expires</string>
     <string name="notification_channel_premium_expires_text">Notification if the premium version expires shortly</string>