safe migration of database (#10)

Author: criticalAY

app/build.gradle.kts

@@ -52,8 +52,8 @@ android {
         //
         // This ensures the correct ordering between the various types of releases (dev < alpha < beta < release) which is
         // needed for upgrades to be offered correctly.
-        versionCode = 10300000
-        versionName = "1.03alpha1"
+        versionCode = 10200301
+        versionName = "1.02.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {

app/src/main/java/com/criticalay/neer/data/NeerDatabase.kt

@@ -16,9 +16,13 @@
 
 package com.criticalay.neer.data
 
+import androidx.room.AutoMigration
 import androidx.room.Database
 import androidx.room.RoomDatabase
 import androidx.room.TypeConverters
+import androidx.room.migration.AutoMigrationSpec
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
 import com.criticalay.neer.alarm.default_alarm.data.AlarmDao
 import com.criticalay.neer.alarm.default_alarm.data.AlarmItem
 import com.criticalay.neer.data.dao.BeverageDao
@@ -27,13 +31,43 @@ import com.criticalay.neer.data.dao.UserDao
 import com.criticalay.neer.data.model.Beverage
 import com.criticalay.neer.data.model.Intake
 import com.criticalay.neer.data.model.User
+import com.criticalay.neer.utils.Constants.ALARM_DATABASE_TABLE
 import com.criticalay.neer.utils.Converters
 
-@Database(entities = [Beverage::class, User::class, Intake::class, AlarmItem::class], version = 1, exportSchema = true)
+@Database(entities = [
+    Beverage::class,
+    User::class,
+    Intake::class,
+    AlarmItem::class],
+    version = 2, exportSchema = true)
 @TypeConverters(Converters::class)
 abstract class NeerDatabase : RoomDatabase() {
     abstract fun userDao(): UserDao
     abstract fun intakeDao() : IntakeDao
     abstract fun beverageDao() : BeverageDao
     abstract fun alarmDao(): AlarmDao
+
+    companion object {
+        val MIGRATION_1_2 = object : Migration(1, 2) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                // Migration code goes here
+                // Example:
+                // database.execSQL("ALTER TABLE users ADD COLUMN age INTEGER")
+                db.execSQL("DROP TABLE IF EXISTS $ALARM_DATABASE_TABLE")
+
+                // Create the new table for AlarmItem with the corrected structure
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS $ALARM_DATABASE_TABLE (" +
+                            "alarmId INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," +
+                            "time INTEGER NOT NULL," + // Corrected to INTEGER
+                            "interval REAL," +
+                            "title TEXT NOT NULL," +
+                            "message TEXT NOT NULL," +
+                            "repeating INTEGER NOT NULL DEFAULT 0," +
+                            "alarmState INTEGER NOT NULL DEFAULT 1)"
+                )
+            }
+        }
+
+    }
 }

app/src/main/java/com/criticalay/neer/di/DatabaseModule.kt

@@ -38,7 +38,7 @@ object DatabaseModule {
             context = context,
             NeerDatabase::class.java,
             NEER_DATABASE_NAME
-        ).build()
+        ).addMigrations(NeerDatabase.MIGRATION_1_2).build()
 
     @Provides
     @Singleton