creating some event related database tables

app/src/main/kotlin/com/simplemobiletools/calendar/pro/EventsDatabase.kt

@@ -0,0 +1,47 @@
+package com.simplemobiletools.calendar.pro
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import com.simplemobiletools.calendar.pro.interfaces.EventRepetitionExceptionsDao
+import com.simplemobiletools.calendar.pro.interfaces.EventRepetitionsDao
+import com.simplemobiletools.calendar.pro.interfaces.EventTypesDao
+import com.simplemobiletools.calendar.pro.interfaces.EventsDao
+import com.simplemobiletools.calendar.pro.models.Event
+import com.simplemobiletools.calendar.pro.models.EventRepetition
+import com.simplemobiletools.calendar.pro.models.EventRepetitionException
+import com.simplemobiletools.calendar.pro.models.EventType
+
+@Database(entities = [Event::class, EventType::class, EventRepetition::class, EventRepetitionException::class], version = 1)
+abstract class EventsDatabase : RoomDatabase() {
+
+    abstract fun EventsDao(): EventsDao
+
+    abstract fun EventTypesDao(): EventTypesDao
+
+    abstract fun EventRepetitionsDao(): EventRepetitionsDao
+
+    abstract fun EventRepetitionExceptionsDao(): EventRepetitionExceptionsDao
+
+    companion object {
+        private var db: EventsDatabase? = null
+
+        fun getInstance(context: Context): EventsDatabase {
+            if (db == null) {
+                synchronized(EventsDatabase::class) {
+                    if (db == null) {
+                        db = Room.databaseBuilder(context.applicationContext, EventsDatabase::class.java, "events.db")
+                                .build()
+                        db!!.openHelper.setWriteAheadLoggingEnabled(true)
+                    }
+                }
+            }
+            return db!!
+        }
+
+        fun destroyInstance() {
+            db = null
+        }
+    }
+}

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

@@ -21,12 +21,17 @@ import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.core.app.AlarmManagerCompat
 import androidx.core.app.NotificationCompat
+import com.simplemobiletools.calendar.pro.EventsDatabase
 import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.activities.EventActivity
 import com.simplemobiletools.calendar.pro.activities.SimpleActivity
 import com.simplemobiletools.calendar.pro.activities.SnoozeReminderActivity
 import com.simplemobiletools.calendar.pro.helpers.*
 import com.simplemobiletools.calendar.pro.helpers.Formatter
+import com.simplemobiletools.calendar.pro.interfaces.EventRepetitionExceptionsDao
+import com.simplemobiletools.calendar.pro.interfaces.EventRepetitionsDao
+import com.simplemobiletools.calendar.pro.interfaces.EventTypesDao
+import com.simplemobiletools.calendar.pro.interfaces.EventsDao
 import com.simplemobiletools.calendar.pro.models.*
 import com.simplemobiletools.calendar.pro.receivers.CalDAVSyncReceiver
 import com.simplemobiletools.calendar.pro.receivers.NotificationReceiver
@@ -43,6 +48,14 @@ import java.util.*
 
 val Context.config: Config get() = Config.newInstance(applicationContext)
 
+val Context.eventsDB: EventsDao get() = EventsDatabase.getInstance(applicationContext).EventsDao()
+
+val Context.eventTypesDB: EventTypesDao get() = EventsDatabase.getInstance(applicationContext).EventTypesDao()
+
+val Context.eventRepetitionssDB: EventRepetitionsDao get() = EventsDatabase.getInstance(applicationContext).EventRepetitionsDao()
+
+val Context.eventRepetitionExceptionsDB: EventRepetitionExceptionsDao get() = EventsDatabase.getInstance(applicationContext).EventRepetitionExceptionsDao()
+
 val Context.dbHelper: DBHelper get() = DBHelper.newInstance(applicationContext)
 
 fun Context.updateWidgets() {

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

@@ -0,0 +1,8 @@
+package com.simplemobiletools.calendar.pro.interfaces
+
+import androidx.room.Dao
+
+@Dao
+interface EventRepetitionExceptionsDao {
+
+}

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

@@ -0,0 +1,8 @@
+package com.simplemobiletools.calendar.pro.interfaces
+
+import androidx.room.Dao
+
+@Dao
+interface EventRepetitionsDao {
+
+}

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

@@ -0,0 +1,8 @@
+package com.simplemobiletools.calendar.pro.interfaces
+
+import androidx.room.Dao
+
+@Dao
+interface EventTypesDao {
+
+}

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

@@ -0,0 +1,8 @@
+package com.simplemobiletools.calendar.pro.interfaces
+
+import androidx.room.Dao
+
+@Dao
+interface EventsDao {
+
+}