moving some delete functions into Room

app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/EventActivity.kt

@@ -682,7 +682,7 @@ class EventActivity : SimpleActivity() {
                 when (it) {
                     DELETE_SELECTED_OCCURRENCE -> dbHelper.addEventRepeatException(mEvent.id!!, mEventOccurrenceTS, true)
                     DELETE_FUTURE_OCCURRENCES -> dbHelper.addEventRepeatLimit(mEvent.id!!, mEventOccurrenceTS)
-                    DELETE_ALL_OCCURRENCES -> dbHelper.deleteEvents(arrayListOf(mEvent.id!!), true)
+                    DELETE_ALL_OCCURRENCES -> EventsHelper(applicationContext).deleteEvent(mEvent.id!!, true)
                 }
                 runOnUiThread {
                     finish()
@@ -776,8 +776,8 @@ class EventActivity : SimpleActivity() {
 
         // recreate the event if it was moved in a different CalDAV calendar
         if (mEvent.id != 0L && oldSource != newSource) {
-            dbHelper.deleteEvents(arrayListOf(mEvent.id!!), true)
+            EventsHelper(this).deleteEvent(mEvent.id!!, true)
-            mEvent.id = 0
+            mEvent.id = null
         }
 
         storeEvent(wasRepeatable)

app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/SettingsActivity.kt

@@ -6,7 +6,10 @@ import android.media.AudioManager
 import android.os.Bundle
 import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.dialogs.SelectCalendarsDialog
-import com.simplemobiletools.calendar.pro.extensions.*
+import com.simplemobiletools.calendar.pro.extensions.config
+import com.simplemobiletools.calendar.pro.extensions.eventTypesDB
+import com.simplemobiletools.calendar.pro.extensions.getSyncedCalDAVCalendars
+import com.simplemobiletools.calendar.pro.extensions.updateWidgets
 import com.simplemobiletools.calendar.pro.helpers.*
 import com.simplemobiletools.calendar.pro.models.EventType
 import com.simplemobiletools.commons.dialogs.ConfirmationDialog
@@ -248,7 +251,7 @@ class SettingsActivity : SimpleActivity() {
         settings_delete_all_events_holder.setOnClickListener {
             ConfirmationDialog(this, messageId = R.string.delete_all_events_confirmation) {
                 Thread {
-                    dbHelper.deleteAllEvents()
+                    EventsHelper(applicationContext).deleteAllEvents()
                 }.start()
             }
         }

app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/DayEventsAdapter.kt

@@ -7,13 +7,9 @@ import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.activities.SimpleActivity
 import com.simplemobiletools.calendar.pro.dialogs.DeleteEventDialog
 import com.simplemobiletools.calendar.pro.extensions.config
-import com.simplemobiletools.calendar.pro.extensions.dbHelper
 import com.simplemobiletools.calendar.pro.extensions.handleEventDeleting
 import com.simplemobiletools.calendar.pro.extensions.shareEvents
-import com.simplemobiletools.calendar.pro.helpers.Formatter
+import com.simplemobiletools.calendar.pro.helpers.*
-import com.simplemobiletools.calendar.pro.helpers.ITEM_EVENT
-import com.simplemobiletools.calendar.pro.helpers.ITEM_EVENT_SIMPLE
-import com.simplemobiletools.calendar.pro.helpers.LOW_ALPHA
 import com.simplemobiletools.calendar.pro.models.Event
 import com.simplemobiletools.commons.adapters.MyRecyclerViewAdapter
 import com.simplemobiletools.commons.extensions.adjustAlpha
@@ -144,7 +140,7 @@ class DayEventsAdapter(activity: SimpleActivity, val events: ArrayList<Event>, r
 
             Thread {
                 val nonRepeatingEventIDs = eventsToDelete.asSequence().filter { it.repeatInterval == 0 }.mapNotNull { it.id }.toMutableList()
-                activity.dbHelper.deleteEvents(nonRepeatingEventIDs, true)
+                EventsHelper(activity).deleteEvents(nonRepeatingEventIDs, true)
 
                 val repeatingEventIDs = eventsToDelete.asSequence().filter { it.repeatInterval != 0 }.mapNotNull { it.id }.toList()
                 activity.handleEventDeleting(repeatingEventIDs, timestamps, it)

app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListAdapter.kt

@@ -7,7 +7,6 @@ import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.activities.SimpleActivity
 import com.simplemobiletools.calendar.pro.dialogs.DeleteEventDialog
 import com.simplemobiletools.calendar.pro.extensions.config
-import com.simplemobiletools.calendar.pro.extensions.dbHelper
 import com.simplemobiletools.calendar.pro.extensions.handleEventDeleting
 import com.simplemobiletools.calendar.pro.extensions.shareEvents
 import com.simplemobiletools.calendar.pro.helpers.*
@@ -208,7 +207,7 @@ class EventListAdapter(activity: SimpleActivity, var listItems: ArrayList<ListIt
 
             Thread {
                 val nonRepeatingEventIDs = eventsToDelete.filter { !it.isRepeatable }.mapNotNull { it.id }.toMutableList()
-                activity.dbHelper.deleteEvents(nonRepeatingEventIDs, true)
+                EventsHelper(activity).deleteEvents(nonRepeatingEventIDs, true)
 
                 val repeatingEventIDs = eventsToDelete.filter { it.isRepeatable }.map { it.id }
                 activity.handleEventDeleting(repeatingEventIDs, timestamps, it)

app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Context.kt

@@ -457,7 +457,7 @@ fun Context.handleEventDeleting(eventIds: List<Long>, timestamps: List<Int>, act
             }
         }
         DELETE_ALL_OCCURRENCES -> {
-            dbHelper.deleteEvents(eventIds.toMutableList(), true)
+            EventsHelper(this).deleteEvents(eventIds.toMutableList(), true)
         }
     }
 }

app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/CalDAVHandler.kt

@@ -259,7 +259,7 @@ class CalDAVHandler(val context: Context) {
             }
         }
 
-        context.dbHelper.deleteEvents(eventIdsToDelete.toMutableList(), false)
+        EventsHelper(context).deleteEvents(eventIdsToDelete.toMutableList(), false)
     }
 
     @SuppressLint("MissingPermission")
@@ -358,7 +358,7 @@ class CalDAVHandler(val context: Context) {
     fun deleteCalDAVCalendarEvents(calendarId: Long) {
         val events = context.dbHelper.getCalDAVCalendarEvents(calendarId)
         val eventIds = events.mapNotNull { it.id }.toMutableList()
-        context.dbHelper.deleteEvents(eventIds, false)
+        EventsHelper(context).deleteEvents(eventIds, false)
     }
 
     fun deleteCalDAVEvent(event: Event) {

app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/DBHelper.kt

@@ -90,57 +90,6 @@ class DBHelper private constructor(val context: Context) : SQLiteOpenHelper(cont
         }
     }
 
-    fun deleteAllEvents() {
-        val cursor = getEventsCursor()
-        val events = fillEvents(cursor).mapNotNull { it.id }.toMutableList()
-        deleteEvents(events, true)
-    }
-
-    fun deleteEvents(ids: MutableList<Long>, deleteFromCalDAV: Boolean) {
-        val eventIds = TextUtils.join(", ", ids)
-        val selection = "$MAIN_TABLE_NAME.$COL_ID IN ($eventIds)"
-        val cursor = getEventsCursor(selection)
-        val eventsWithImportId = fillEvents(cursor).filter { it.importId.isNotEmpty() }
-
-        mDb.delete(MAIN_TABLE_NAME, selection, null)
-
-        // temporary workaround, will be rewritten in Room
-        ids.filterNot { it == 0L }.forEach {
-            context.cancelNotification(it)
-        }
-
-        if (deleteFromCalDAV && context.config.caldavSync) {
-            eventsWithImportId.forEach {
-                CalDAVHandler(context).deleteCalDAVEvent(it)
-            }
-        }
-
-        deleteChildEvents(ids, deleteFromCalDAV)
-        context.updateWidgets()
-    }
-
-    private fun deleteChildEvents(ids: MutableList<Long>, deleteFromCalDAV: Boolean) {
-        val projection = arrayOf(COL_ID)
-        val selection = "$COL_PARENT_EVENT_ID IN ($ids)"
-        val childIds = ArrayList<Long>()
-
-        var cursor: Cursor? = null
-        try {
-            cursor = mDb.query(MAIN_TABLE_NAME, projection, selection, null, null, null, null)
-            if (cursor?.moveToFirst() == true) {
-                do {
-                    childIds.add(cursor.getLongValue(COL_ID))
-                } while (cursor.moveToNext())
-            }
-        } finally {
-            cursor?.close()
-        }
-
-        if (childIds.isNotEmpty()) {
-            deleteEvents(childIds, deleteFromCalDAV)
-        }
-    }
-
     fun getCalDAVCalendarEvents(calendarId: Long): List<Event> {
         val selection = "$MAIN_TABLE_NAME.$COL_EVENT_SOURCE = (?)"
         val selectionArgs = arrayOf("$CALDAV-$calendarId")
@@ -177,7 +126,7 @@ class DBHelper private constructor(val context: Context) : SQLiteOpenHelper(cont
         val cursor = getEventsCursor(selection, selectionArgs)
         val events = fillEvents(cursor)
         val eventIDs = events.mapNotNull { it.id }.toMutableList()
-        deleteEvents(eventIDs, true)
+        EventsHelper(context).deleteEvents(eventIDs, true)
     }
 
     fun resetEventsWithType(eventTypeId: Long) {

app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt

@@ -135,4 +135,36 @@ class EventsHelper(val context: Context) {
         }
         callback?.invoke()
     }
+
+    fun deleteAllEvents() {
+        val eventIds = context.eventsDB.getEventIds().toMutableList()
+        EventsHelper(context).deleteEvents(eventIds, true)
+    }
+
+    fun deleteEvent(id: Long, deleteFromCalDAV: Boolean) = deleteEvents(arrayListOf(id), deleteFromCalDAV)
+
+    fun deleteEvents(ids: MutableList<Long>, deleteFromCalDAV: Boolean) {
+        val eventsWithImportId = context.eventsDB.getEventsByIdsWithImportIds(ids)
+        context.eventsDB.deleteEvents(ids)
+
+        ids.forEach {
+            context.cancelNotification(it)
+        }
+
+        if (deleteFromCalDAV && context.config.caldavSync) {
+            eventsWithImportId.forEach {
+                CalDAVHandler(context).deleteCalDAVEvent(it)
+            }
+        }
+
+        deleteChildEvents(ids, deleteFromCalDAV)
+        context.updateWidgets()
+    }
+
+    fun deleteChildEvents(ids: MutableList<Long>, deleteFromCalDAV: Boolean) {
+        val childIds = context.eventsDB.getEventIdsWithParentIds(ids).toMutableList()
+        if (childIds.isNotEmpty()) {
+            deleteEvents(childIds, deleteFromCalDAV)
+        }
+    }
 }

app/src/main/kotlin/com/simplemobiletools/calendar/pro/interfaces/EventsDao.kt

@@ -13,15 +13,24 @@ interface EventsDao {
     @Query("SELECT * FROM events WHERE id = :id")
     fun getEventWithId(id: Long): Event?
 
+    @Query("SELECT id FROM events")
+    fun getEventIds(): List<Long>
+
     @Query("SELECT id FROM events WHERE import_id = :importId")
     fun getEventIdWithImportId(importId: String): Long?
 
     @Query("SELECT id FROM events WHERE import_id LIKE :importId")
     fun getEventIdWithLastImportId(importId: String): Long?
 
+    @Query("SELECT * FROM events WHERE id IN (:ids) AND import_id != \"\"")
+    fun getEventsByIdsWithImportIds(ids: List<Long>): List<Event>
+
     @Query("SELECT * FROM events WHERE id IN (:ids)")
     fun getEventsWithIds(ids: List<Long>): List<Event>
 
+    @Query("SELECT id FROM events WHERE parent_id IN (:parentIds)")
+    fun getEventIdsWithParentIds(parentIds: List<Long>): List<Long>
+
     @Query("SELECT * FROM events WHERE source = \'$SOURCE_CONTACT_BIRTHDAY\'")
     fun getBirthdays(): List<Event>
 
@@ -33,4 +42,7 @@ interface EventsDao {
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     fun insertOrUpdate(event: Event): Long
+
+    @Query("DELETE FROM events WHERE id IN (:ids)")
+    fun deleteEvents(ids: List<Long>)
 }