Add built-in notifications filter

app/src/main/java/com/todoroo/astrid/core/BuiltInFilterExposer.kt

@@ -66,6 +66,11 @@ class BuiltInFilterExposer @Inject constructor(
         if (taskDao.activeTimers() > 0) {
             filters.add(TimerPlugin.createFilter(context))
         }
+        if (taskDao.hasNotifications() > 0) {
+            val element = NotificationsFilter(context)
+            element.icon = R.drawable.ic_outline_notifications_24px
+            filters.add(element)
+        }
         return filters
     }
 
@@ -160,6 +165,8 @@ class BuiltInFilterExposer @Inject constructor(
 
         fun getSnoozedFilter(r: Resources) = SnoozedFilter(r.getString(R.string.filter_snoozed))
 
+        fun getNotificationsFilter(context: Context) = NotificationsFilter(context)
+
         @JvmStatic
         fun isInbox(context: Context, filter: Filter?) =
                 filter == getMyTasksFilter(context.resources)
@@ -173,5 +180,8 @@ class BuiltInFilterExposer @Inject constructor(
 
         fun isSnoozedFilter(context: Context, filter: Filter?) =
                 filter == getSnoozedFilter(context.resources)
+
+        fun isNotificationsFilter(context: Context, filter: Filter?) =
+            filter == getNotificationsFilter(context)
     }
 }

app/src/main/java/org/tasks/data/TaskDao.kt

@@ -46,6 +46,9 @@ abstract class TaskDao(private val database: Database) {
     @Query("SELECT COUNT(1) FROM tasks INNER JOIN alarms ON tasks._id = alarms.task WHERE type = $TYPE_SNOOZE")
     abstract suspend fun snoozedReminders(): Int
 
+    @Query("SELECT COUNT(1) FROM tasks INNER JOIN notification ON tasks._id = notification.task")
+    abstract suspend fun hasNotifications(): Int
+
     @Query("SELECT tasks.* FROM tasks INNER JOIN notification ON tasks._id = notification.task")
     abstract suspend fun activeNotifications(): List<Task>
 

app/src/main/java/org/tasks/preferences/DefaultFilterProvider.kt

@@ -142,6 +142,7 @@ class DefaultFilterProvider @Inject constructor(
         FILTER_TODAY -> BuiltInFilterExposer.getTodayFilter(context.resources)
         FILTER_RECENTLY_MODIFIED -> BuiltInFilterExposer.getRecentlyModifiedFilter(context.resources)
         FILTER_SNOOZED -> BuiltInFilterExposer.getSnoozedFilter(context.resources)
+        FILTER_NOTIFICATIONS -> BuiltInFilterExposer.getNotificationsFilter(context)
         else -> getMyTasksFilter(context.resources)
     }
 
@@ -150,6 +151,7 @@ class DefaultFilterProvider @Inject constructor(
             isToday() -> FILTER_TODAY
             isRecentlyModified() -> FILTER_RECENTLY_MODIFIED
             isSnoozed() -> FILTER_SNOOZED
+            isNotifications() -> FILTER_NOTIFICATIONS
             else -> FILTER_MY_TASKS
         }
     }
@@ -196,6 +198,9 @@ class DefaultFilterProvider @Inject constructor(
     private fun Filter.isSnoozed() =
         BuiltInFilterExposer.isSnoozedFilter(context, this)
 
+    private fun Filter.isNotifications() =
+        BuiltInFilterExposer.isNotificationsFilter(context, this)
+
     companion object {
         private const val TYPE_FILTER = 0
         private const val TYPE_CUSTOM_FILTER = 1
@@ -208,5 +213,6 @@ class DefaultFilterProvider @Inject constructor(
         @Suppress("unused") private const val FILTER_UNCATEGORIZED = 2
         private const val FILTER_RECENTLY_MODIFIED = 3
         private const val FILTER_SNOOZED = 4
+        private const val FILTER_NOTIFICATIONS = 5
     }
 }