Implement delete message action

app/src/main/java/chat/rocket/android/chatroom/presentation/ChatRoomPresenter.kt

@@ -7,12 +7,14 @@ import chat.rocket.android.server.domain.GetSettingsInteractor
 import chat.rocket.android.server.domain.MessagesRepository
 import chat.rocket.android.server.infraestructure.RocketChatClientFactory
 import chat.rocket.android.util.launchUI
+import chat.rocket.common.RocketChatException
 import chat.rocket.common.model.roomTypeOf
 import chat.rocket.common.util.ifNull
 import chat.rocket.core.internal.realtime.State
 import chat.rocket.core.internal.realtime.connect
 import chat.rocket.core.internal.realtime.subscribeRoomMessages
 import chat.rocket.core.internal.realtime.unsubscibre
+import chat.rocket.core.internal.rest.deleteMessage
 import chat.rocket.core.internal.rest.messages
 import chat.rocket.core.internal.rest.sendMessage
 import chat.rocket.core.model.Message
@@ -31,7 +33,6 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
                                             factory: RocketChatClientFactory,
                                             private val mapper: MessageViewModelMapper) {
     private val client = factory.create(serverInteractor.get()!!)
-    private val roomMessages = ArrayList<Message>()
     private var subId: String? = null
     private var settings: Map<String, Value<Any>>? = null
 
@@ -46,10 +47,7 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
             view.showLoading()
             try {
                 val messages = client.messages(chatRoomId, roomTypeOf(chatRoomType), offset, 30).result
-                synchronized(roomMessages) {
-                    roomMessages.addAll(messages)
                 messagesRepository.saveAll(messages)
-                }
 
                 val messagesViewModels = mapper.mapToViewModelList(messages, settings)
                 view.showMessages(messagesViewModels, serverInteractor.get()!!)
@@ -142,6 +140,26 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
         }
     }
 
+    /**
+     * Delete the message with the given id.
+     *
+     * @param roomId The room id of the message to be deleted.
+     * @param id The id of the message to be deleted.
+     */
+    fun deleteMessage(roomId: String, id: String) {
+        launchUI(strategy) {
+            //TODO: Default delete message always to true. Until we have the permissions system
+            //implemented, a user will only be able to delete his own messages.
+            try {
+                //TODO: Should honor permission 'Message_ShowDeletedStatus'
+                client.deleteMessage(roomId, id, true)
+            } catch (e: RocketChatException) {
+                //TODO: Handle permission error.
+                Timber.e(e)
+            }
+        }
+    }
+
     private suspend fun listenMessages(roomId: String) {
         launch(CommonPool + strategy.jobs) {
             for (message in client.messagesChannel) {
@@ -157,18 +175,17 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
     private fun updateMessage(streamedMessage: Message) {
         launchUI(strategy) {
             val viewModelStreamedMessage = mapper.mapToViewModel(streamedMessage, settings)
-            synchronized(roomMessages) {
+            val roomMessages = messagesRepository.getByRoomId(streamedMessage.roomId)
             val index = roomMessages.indexOfFirst { msg -> msg.id == streamedMessage.id }
-                if (index != -1) {
-                    Timber.d("Updatind message at $index")
-                    roomMessages[index] = streamedMessage
+            if (index > -1) {
+                Timber.d("Updating message at $index")
+                messagesRepository.save(streamedMessage)
                 view.dispatchUpdateMessage(index, viewModelStreamedMessage)
             } else {
                 Timber.d("Adding new message")
-                    roomMessages.add(0, streamedMessage)
+                messagesRepository.save(streamedMessage)
                 view.showNewMessage(viewModelStreamedMessage)
             }
         }
     }
-    }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomAdapter.kt

@@ -8,6 +8,7 @@ import android.widget.ImageView
 import android.widget.PopupMenu
 import android.widget.TextView
 import chat.rocket.android.R
+import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
 import chat.rocket.android.chatroom.viewmodel.AttachmentType
 import chat.rocket.android.chatroom.viewmodel.MessageViewModel
 import chat.rocket.android.player.PlayerActivity
@@ -21,7 +22,8 @@ import kotlinx.android.synthetic.main.avatar.view.*
 import kotlinx.android.synthetic.main.item_message.view.*
 import kotlinx.android.synthetic.main.message_attachment.view.*
 
-class ChatRoomAdapter(private val serverUrl: String) : RecyclerView.Adapter<ChatRoomAdapter.ViewHolder>() {
+class ChatRoomAdapter(private val serverUrl: String,
+                      private val presenter: ChatRoomPresenter) : RecyclerView.Adapter<ChatRoomAdapter.ViewHolder>() {
 
     init {
         setHasStableIds(true)
@@ -30,7 +32,7 @@ class ChatRoomAdapter(private val serverUrl: String) : RecyclerView.Adapter<Chat
     val dataSet = ArrayList<MessageViewModel>()
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder =
-            ViewHolder(parent.inflate(R.layout.item_message), serverUrl)
+            ViewHolder(parent.inflate(R.layout.item_message), serverUrl, presenter)
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) = holder.bind(dataSet[position])
 
@@ -53,16 +55,19 @@ class ChatRoomAdapter(private val serverUrl: String) : RecyclerView.Adapter<Chat
         notifyItemInserted(0)
     }
 
-    fun updateItem(index: Int, message: MessageViewModel) {
+    fun updateItem(message: MessageViewModel) {
+        val index = dataSet.indexOfFirst { it.id == message.id }
+        if (index > -1) {
             dataSet[index] = message
             notifyItemChanged(index)
         }
+    }
 
     override fun getItemId(position: Int): Long {
         return dataSet[position].id.hashCode().toLong()
     }
 
-    class ViewHolder(itemView: View, val serverUrl: String) : RecyclerView.ViewHolder(itemView) {
+    class ViewHolder(itemView: View, val serverUrl: String, val presenter: ChatRoomPresenter) : RecyclerView.ViewHolder(itemView) {
 
         fun bind(message: MessageViewModel) = with(itemView) {
             bindUserAvatar(message, image_avatar, image_unknown_avatar)
@@ -74,9 +79,16 @@ class ChatRoomAdapter(private val serverUrl: String) : RecyclerView.Adapter<Chat
             bindAttachment(message, message_attachment, image_attachment, audio_video_attachment,
                     file_name)
 
-            itemView.setOnClickListener {
+            text_content.setOnClickListener {
                 val popup = PopupMenu(it.context, it)
                 popup.menuInflater.inflate(R.menu.message_actions, popup.menu)
+                popup.setOnMenuItemClickListener {
+                    when (it.itemId) {
+                        R.id.action_menu_msg_delete -> presenter.deleteMessage(message.roomId, message.id)
+                        else -> TODO("Not implemented")
+                    }
+                    true
+                }
                 popup.show()
             }
         }

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomFragment.kt

@@ -39,7 +39,6 @@ private const val BUNDLE_CHAT_ROOM_TYPE = "chat_room_type"
 private const val BUNDLE_IS_CHAT_ROOM_READ_ONLY = "is_chat_room_read_only"
 
 class ChatRoomFragment : Fragment(), ChatRoomView {
-
     @Inject lateinit var presenter: ChatRoomPresenter
     private lateinit var chatRoomId: String
     private lateinit var chatRoomName: String
@@ -78,7 +77,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
     override fun showMessages(dataSet: List<MessageViewModel>, serverUrl: String) {
         activity?.apply {
             if (recycler_view.adapter == null) {
-                adapter = ChatRoomAdapter(serverUrl)
+                adapter = ChatRoomAdapter(serverUrl, presenter)
                 recycler_view.adapter = adapter
                 val linearLayoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, true)
                 recycler_view.layoutManager = linearLayoutManager
@@ -120,7 +119,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
     }
 
     override fun dispatchUpdateMessage(index: Int, message: MessageViewModel) {
-        adapter.updateItem(index, message)
+        adapter.updateItem(message)
     }
 
     override fun showLoading() = view_loading.setVisible(true)

app/src/main/java/chat/rocket/android/chatroom/viewmodel/MessageViewModel.kt

@@ -32,6 +32,7 @@ data class MessageViewModel(val context: Context,
                             private val parser: MessageParser,
                             private val messagesRepository: MessagesRepository) {
     val id: String = message.id
+    val roomId: String = message.roomId
     val time: CharSequence
     val sender: CharSequence
     val content: CharSequence