Adds Message retrieval

backend/src/main/java/net/buzzert/kordophone/backend/db/CachedChatDatabase.kt

@@ -3,12 +3,16 @@ package net.buzzert.kordophone.backend.db
 import io.realm.kotlin.Realm
 import io.realm.kotlin.RealmConfiguration
 import net.buzzert.kordophone.backend.db.model.Conversation
+import net.buzzert.kordophone.backend.db.model.Message
 import net.buzzert.kordophone.backend.db.model.toDatabaseConversation
+import net.buzzert.kordophone.backend.db.model.toDatabaseMessage
+import net.buzzert.kordophone.backend.model.GUID
 import net.buzzert.kordophone.backend.model.Conversation as ModelConversation
+import net.buzzert.kordophone.backend.model.Message as ModelMessage
 
 internal class CachedChatDatabase (private val realmConfig: RealmConfiguration) {
     companion object {
-        private val schema = setOf(Conversation::class)
+        private val schema = setOf(Conversation::class, Message::class)
 
         fun liveDatabase(): CachedChatDatabase {
             return CachedChatDatabase(
@@ -43,4 +47,22 @@ internal class CachedChatDatabase (private val realmConfig: RealmConfiguration)
         val items = realm.query(Conversation::class).find()
         return items.map { it.toConversation() }
     }
+
+    fun writeMessages(messages: List<ModelMessage>, conversation: ModelConversation) {
+        val dbConversation = getConversationByGuid(conversation.guid)
+        realm.writeBlocking {
+            findLatest(dbConversation)?.messages?.addAll(messages.map { it.toDatabaseMessage() })
+        }
+    }
+
+    fun fetchMessages(conversation: ModelConversation): List<ModelMessage> {
+        val dbConversation = getConversationByGuid(conversation.guid)
+        return dbConversation.messages.map { it.toMessage() }
+    }
+
+    private fun getConversationByGuid(guid: GUID): Conversation {
+        return realm.query(Conversation::class, "guid == '$guid'")
+            .find()
+            .first()
+    }
 }

backend/src/main/java/net/buzzert/kordophone/backend/db/model/Conversation.kt

@@ -24,18 +24,19 @@ open class Conversation(
     var lastMessagePreview: String,
     var guid: GUID,
 
-    // TODO: Not sure how to do this yet...
-    // var messages: RealmList<Message>,
+    var messages: RealmList<Message>,
 ): RealmObject
 {
     constructor(): this(
         _id = ObjectId().toString(),
         displayName = null,
-        participants = realmListOf(),
+        participants = realmListOf<String>(),
         date = RealmInstant.now(),
         unreadCount = 0,
         lastMessagePreview = "",
         guid = "",
+
+        messages = realmListOf<Message>()
     )
 
     fun toConversation(): ModelConversation {

backend/src/test/java/net/buzzert/kordophone/backend/DatabaseTests.kt

@@ -2,13 +2,14 @@ package net.buzzert.kordophone.backend
 
 import net.buzzert.kordophone.backend.db.CachedChatDatabase
 import net.buzzert.kordophone.backend.model.Conversation
+import net.buzzert.kordophone.backend.model.Message
 import org.junit.Assert.assertEquals
 import org.junit.Test
 import java.util.Date
 
 class DatabaseTests {
     @Test
-    fun testCreateRetrieve() {
+    fun testConversationRetrieval() {
         val db = CachedChatDatabase.testDatabase()
 
         val conversation = Conversation(
@@ -28,4 +29,35 @@ class DatabaseTests {
         val readConversation = readBackConversations[0]
         assertEquals(readConversation, conversation)
     }
+
+    @Test
+    fun testMessageRetrieval() {
+        val db = CachedChatDatabase.testDatabase()
+
+        val conversation = Conversation(
+            date = Date(),
+            participants = listOf("james@magahern.com"),
+            displayName = "Test",
+            unreadCount = 1,
+            lastMessagePreview = "Hello!",
+            guid = "1234",
+        )
+
+        db.writeConversations(listOf(conversation))
+
+        val message = Message(
+            text = "Hello!",
+            guid = "4321",
+            date = Date(),
+            sender = "james@magahern.com"
+        )
+
+        db.writeMessages(listOf(message), conversation)
+
+        val readMessages = db.fetchMessages(conversation)
+        assertEquals(readMessages.count(), 1)
+
+        val readMessage = readMessages[0]
+        assertEquals(readMessage, message)
+    }
 }