creating a database table for MessageAttachments too

app/src/main/kotlin/com/simplemobiletools/smsmessenger/databases/MessagesDatabase.kt

@@ -4,20 +4,27 @@ import android.content.Context
 import androidx.room.Database
 import androidx.room.Room
 import androidx.room.RoomDatabase
+import androidx.room.TypeConverters
 import androidx.room.migration.Migration
 import androidx.sqlite.db.SupportSQLiteDatabase
+import com.simplemobiletools.smsmessenger.helpers.Converters
 import com.simplemobiletools.smsmessenger.interfaces.AttachmentsDao
 import com.simplemobiletools.smsmessenger.interfaces.ConversationsDao
+import com.simplemobiletools.smsmessenger.interfaces.MessageAttachmentsDao
 import com.simplemobiletools.smsmessenger.models.Attachment
 import com.simplemobiletools.smsmessenger.models.Conversation
+import com.simplemobiletools.smsmessenger.models.MessageAttachment
 
-@Database(entities = [Conversation::class, Attachment::class], version = 2)
+@Database(entities = [Conversation::class, Attachment::class, MessageAttachment::class], version = 2)
+@TypeConverters(Converters::class)
 abstract class MessagesDatabase : RoomDatabase() {
 
     abstract fun ConversationsDao(): ConversationsDao
 
     abstract fun AttachmentsDao(): AttachmentsDao
 
+    abstract fun MessageAttachmentsDao(): MessageAttachmentsDao
+
     companion object {
         private var db: MessagesDatabase? = null
 
@@ -37,6 +44,8 @@ abstract class MessagesDatabase : RoomDatabase() {
 
         private val MIGRATION_1_2 = object : Migration(1, 2) {
             override fun migrate(database: SupportSQLiteDatabase) {
+                database.execSQL("CREATE TABLE IF NOT EXISTS `message_attachments` (`id` INTEGER PRIMARY KEY NOT NULL, `text` TEXT NOT NULL, `attachments` TEXT NOT NULL)")
+
                 database.execSQL("CREATE TABLE IF NOT EXISTS `attachments` (`id` INTEGER PRIMARY KEY AUTOINCREMENT, `message_id` INTEGER NOT NULL, `uri_string` TEXT NOT NULL, `mimetype` TEXT NOT NULL, `width` INTEGER NOT NULL, `height` INTEGER NOT NULL, `filename` TEXT NOT NULL)")
                 database.execSQL("CREATE UNIQUE INDEX `index_attachments_message_id` ON `attachments` (`message_id`)")
             }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt

@@ -29,6 +29,7 @@ import com.simplemobiletools.smsmessenger.databases.MessagesDatabase
 import com.simplemobiletools.smsmessenger.helpers.*
 import com.simplemobiletools.smsmessenger.interfaces.AttachmentsDao
 import com.simplemobiletools.smsmessenger.interfaces.ConversationsDao
+import com.simplemobiletools.smsmessenger.interfaces.MessageAttachmentsDao
 import com.simplemobiletools.smsmessenger.models.*
 import com.simplemobiletools.smsmessenger.receivers.DirectReplyReceiver
 import com.simplemobiletools.smsmessenger.receivers.MarkAsReadReceiver
@@ -44,6 +45,8 @@ val Context.conversationsDB: ConversationsDao get() = getMessagessDB().Conversat
 
 val Context.attachmentsDB: AttachmentsDao get() = getMessagessDB().AttachmentsDao()
 
+val Context.messageAttachmentsDB: MessageAttachmentsDao get() = getMessagessDB().MessageAttachmentsDao()
+
 fun Context.getMessages(threadId: Int): ArrayList<Message> {
     val uri = Sms.CONTENT_URI
     val projection = arrayOf(

app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Converters.kt

@@ -0,0 +1,17 @@
+package com.simplemobiletools.smsmessenger.helpers
+
+import androidx.room.TypeConverter
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import com.simplemobiletools.smsmessenger.models.Attachment
+
+class Converters {
+    private val gson = Gson()
+    private val attachmentType = object : TypeToken<List<Attachment>>() {}.type
+
+    @TypeConverter
+    fun jsonToAttachmentList(value: String) = gson.fromJson<ArrayList<Attachment>>(value, attachmentType)
+
+    @TypeConverter
+    fun attachmentListToJson(list: ArrayList<Attachment>) = gson.toJson(list)
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/interfaces/MessageAttachmentsDao.kt

@@ -0,0 +1,11 @@
+package com.simplemobiletools.smsmessenger.interfaces
+
+import androidx.room.Dao
+import androidx.room.Query
+import com.simplemobiletools.smsmessenger.models.MessageAttachment
+
+@Dao
+interface MessageAttachmentsDao {
+    @Query("SELECT * FROM message_attachments")
+    fun getAll(): List<MessageAttachment>
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/models/MessageAttachment.kt

@@ -1,3 +1,11 @@
 package com.simplemobiletools.smsmessenger.models
 
-data class MessageAttachment(val id: Long, var text: String, var attachments: ArrayList<Attachment>)
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "message_attachments")
+data class MessageAttachment(
+    @PrimaryKey val id: Long,
+    @ColumnInfo(name = "text") var text: String,
+    @ColumnInfo(name = "attachments") var attachments: ArrayList<Attachment>)