MediaGroupMessage implementation

CHANGELOG

@@ -1 +1,8 @@
 # TelegramBotAPI changelog
+
+## 0.8.1
+
+* Update `MediaGroupMessage` interface
+* Add implementation of `MediaGroupMessage`
+* Add generating of `MediaGroupMessage` in `RawMessage`
+

src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/message/MediaGroupMessage.kt

@@ -0,0 +1,17 @@
+package com.github.insanusmokrassar.TelegramBotAPI.types.message
+
+import com.github.insanusmokrassar.TelegramBotAPI.types.MediaGroupIdentifier
+import com.github.insanusmokrassar.TelegramBotAPI.types.MessageIdentifier
+import com.github.insanusmokrassar.TelegramBotAPI.types.chat.Chat
+import com.github.insanusmokrassar.TelegramBotAPI.types.message.abstracts.MediaGroupMessage
+import com.github.insanusmokrassar.TelegramBotAPI.types.message.abstracts.Message
+import com.github.insanusmokrassar.TelegramBotAPI.types.message.content.abstracts.MediaGroupContent
+import org.joda.time.DateTime
+
+data class MediaGroupMessage(
+    override val messageId: MessageIdentifier,
+    override val chat: Chat,
+    override val date: DateTime,
+    override val mediaGroupId: MediaGroupIdentifier,
+    override val content: MediaGroupContent
+) : Message, MediaGroupMessage

src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/message/RawMessage.kt

@@ -207,7 +207,19 @@ data class RawMessage(
             }
         } ?: content ?.let {
             content ->
-            when (chat) {
+            media_group_id ?.let {
+                MediaGroupMessage(
+                    messageId,
+                    chat,
+                    date.asDate,
+                    it,
+                    when (content) {
+                        is PhotoContent -> content
+                        is VideoContent -> content
+                        else -> throw IllegalStateException("Unsupported content for media group")
+                    }
+                )
+            } ?: when (chat) {
                 is ChannelChat -> ChannelMessage(
                     messageId,
                     chat,

src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/message/abstracts/MediaGroupMessage.kt

@@ -1,8 +1,9 @@
 package com.github.insanusmokrassar.TelegramBotAPI.types.message.abstracts
 
+import com.github.insanusmokrassar.TelegramBotAPI.types.MediaGroupIdentifier
 import com.github.insanusmokrassar.TelegramBotAPI.types.message.content.abstracts.MediaGroupContent
 
-interface MediaGroupMessage<T: MediaGroupContent> {
+interface MediaGroupMessage : Message {
-    val mediaGroupId: String
+    val mediaGroupId: MediaGroupIdentifier
-    val content: T
+    val content: MediaGroupContent
 }