pinned message in messages history draft

core/domain/src/main/kotlin/dev/meloda/fast/domain/MessagesUseCase.kt

@@ -47,6 +47,16 @@ interface MessagesUseCase {
         title: String?
     ): Flow<State<Int>>
 
+    fun pin(
+        peerId: Int,
+        messageId: Int?,
+        conversationMessageId: Int?
+    ): Flow<State<VkMessage>>
+
+    fun unpin(
+        peerId: Int
+    ): Flow<State<Int>>
+
     suspend fun storeMessage(message: VkMessage)
     suspend fun storeMessages(messages: List<VkMessage>)
 }

core/domain/src/main/kotlin/dev/meloda/fast/domain/MessagesUseCaseImpl.kt

@@ -108,6 +108,30 @@ class MessagesUseCaseImpl(
         emit(newState)
     }
 
+    override fun pin(
+        peerId: Int,
+        messageId: Int?,
+        conversationMessageId: Int?
+    ): Flow<State<VkMessage>> = flow {
+        emit(State.Loading)
+
+        val newState = repository.pin(
+            peerId = peerId,
+            messageId = messageId,
+            conversationMessageId = conversationMessageId
+        ).mapToState()
+
+        emit(newState)
+    }
+
+    override fun unpin(peerId: Int): Flow<State<Int>> = flow {
+        emit(State.Loading)
+
+        val newState = repository.unpin(peerId = peerId).mapToState()
+
+        emit(newState)
+    }
+
     override suspend fun storeMessage(message: VkMessage) {
         repository.storeMessages(listOf(message))
     }