Migrate from Sugar ORM to Room

- table not altered so migration from db version 3 to 4 is simple
- bug fixes

Signed-off-by: Arka Prava Basu <[email protected]>

src/main/java/org/havenapp/main/database/HavenEventDB.kt

@@ -8,13 +8,14 @@ import android.content.Context
 import org.havenapp.main.dao.EventDAO
 import org.havenapp.main.dao.EventTriggerDAO
 import org.havenapp.main.database.converter.HavenEventDBConverters
+import org.havenapp.main.database.migration.RoomMigration
 import org.havenapp.main.model.Event
 import org.havenapp.main.model.EventTrigger
 
 /**
  * Created by Arka Prava Basu <[email protected]> on 23/5/18.
  */
-@Database(entities = [(Event::class), (EventTrigger::class)], version = 3)
+@Database(entities = [(Event::class), (EventTrigger::class)], version = 4)
 @TypeConverters(HavenEventDBConverters::class)
 abstract class HavenEventDB: RoomDatabase() {
 
@@ -34,6 +35,7 @@ abstract class HavenEventDB: RoomDatabase() {
                         INSTANCE = Room.databaseBuilder(context.applicationContext,
                                 HavenEventDB::class.java, "haven.db")
                                 .allowMainThreadQueries() // todo remove this
+                                .addMigrations(RoomMigration())
                                 .build()
                     }
                 }

src/main/java/org/havenapp/main/database/migration/RoomMigration.kt

@@ -0,0 +1,16 @@
+package org.havenapp.main.database.migration
+
+import android.arch.persistence.db.SupportSQLiteDatabase
+import android.arch.persistence.room.migration.Migration
+
+/**
+ * [Migration] for the transition from Sugar ORM (database version = 3)
+ * to Room database (database version = 4).
+ * <p>
+ * Created by Arka Prava Basu <[email protected]> on 28/8/18.
+ */
+class RoomMigration: Migration(3, 4) {
+    override fun migrate(database: SupportSQLiteDatabase) {
+        // Since we did not alter table, nothing to do here.
+    }
+}

src/main/java/org/havenapp/main/service/MonitorService.java

@@ -299,7 +299,7 @@ public synchronized void alert(int alertType, String path) {
             mLastEvent.setId(eventId);
             doNotification = true;
             // set current event start date in prefs
-            mPrefs.setCurrentSession(mLastEvent.getStartTime());
+            mPrefs.setCurrentSession(mLastEvent.getMStartTime());
         }
         else if (mPrefs.getNotificationTimeMs() == 0)
         {