Send message using SDK

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

@@ -8,6 +8,7 @@ import chat.rocket.common.model.BaseRoom
 import chat.rocket.common.util.ifNull
 import chat.rocket.core.RocketChatClient
 import chat.rocket.core.internal.rest.messages
+import chat.rocket.core.internal.rest.sendMessage
 import javax.inject.Inject
 
 class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
@@ -16,7 +17,7 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
                                             factory: RocketChatClientFactory) {
     private val client = factory.create(serverInteractor.get()!!)
 
-    fun messages(chatRoomId: String, chatRoomType: String, offset: Int = 0) {
+    fun loadMessages(chatRoomId: String, chatRoomType: String, offset: Int = 0) {
         launchUI(strategy) {
             view.showLoading()
             try {
@@ -33,4 +34,19 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
             }
         }
     }
+
+    fun sendMessage(chatRoomId: String, text: String) {
+        launchUI(strategy) {
+            try {
+                val message = client.sendMessage(chatRoomId, text)
+                view.showSentMessage(message)
+            } catch (ex: Exception) {
+                ex.message?.let {
+                    view.showMessage(it)
+                }.ifNull {
+                    view.showGenericErrorMessage()
+                }
+            }
+        }
+    }
 }
\ No newline at end of file

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

@@ -13,4 +13,18 @@ interface ChatRoomView : LoadingView, MessageView {
      * @param serverUrl The server URL.
      */
     fun showMessages(dataSet: MutableList<Message>, serverUrl: String)
+
+    /**
+     * Send a message to a chat room.
+     *
+     * @param text The text to send.
+     */
+    fun sendMessage(text: String)
+
+    /**
+     * Shows a (recent) message sent to a chat room.
+
+     * @param message The (recent) message sent to a chat room.
+     */
+    fun showSentMessage(message: Message)
 }
\ No newline at end of file

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

@@ -35,6 +35,11 @@ class ChatRoomAdapter(private val context: Context,
         notifyItemRangeInserted(previousDataSetSize, dataSet.size)
     }
 
+    fun addItem(message: Message) {
+        dataSet.add(0, message)
+        notifyItemInserted(0)
+    }
+
     inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
 
         fun bind(message: Message) = with(itemView) {

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

@@ -14,9 +14,11 @@ import chat.rocket.android.chatroom.presentation.ChatRoomView
 import chat.rocket.android.helper.EndlessRecyclerViewScrollListener
 import chat.rocket.android.util.inflate
 import chat.rocket.android.util.setVisibility
+import chat.rocket.android.util.textContent
 import chat.rocket.core.model.Message
 import dagger.android.support.AndroidSupportInjection
-import kotlinx.android.synthetic.main.fragment_chat_rooms.*
+import kotlinx.android.synthetic.main.fragment_chat_room.*
+import kotlinx.android.synthetic.main.message_composer.*
 import javax.inject.Inject
 
 fun newInstance(chatRoomId: String, chatRoomName: String, chatRoomType: String, isChatRoomOpen: Boolean): Fragment {
@@ -41,6 +43,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
     private lateinit var chatRoomName: String
     private lateinit var chatRoomType: String
     private var isChatRoomOpen: Boolean = true
+    private lateinit var adapter: ChatRoomAdapter
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -61,28 +64,42 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        presenter.messages(chatRoomId, chatRoomType)
+        presenter.loadMessages(chatRoomId, chatRoomType)
+        setupComposer()
     }
 
     override fun showMessages(dataSet: MutableList<Message>, serverUrl: String) {
         activity?.apply {
             if (recycler_view.adapter == null) {
-                recycler_view.adapter = ChatRoomAdapter(this, dataSet, serverUrl)
+                adapter = ChatRoomAdapter(this, dataSet, serverUrl)
+                recycler_view.adapter = adapter
                 val linearLayoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, true)
                 recycler_view.layoutManager = linearLayoutManager
                 if (dataSet.size >= 30) {
                     recycler_view.addOnScrollListener(object : EndlessRecyclerViewScrollListener(linearLayoutManager) {
                         override fun onLoadMore(page: Int, totalItemsCount: Int, recyclerView: RecyclerView?) {
-                            presenter.messages(chatRoomId, chatRoomType, page * 30)
+                            presenter.loadMessages(chatRoomId, chatRoomType, page * 30)
                         }
                     })
                 }
             } else {
-                (recycler_view.adapter as ChatRoomAdapter).addDataSet(dataSet)
+                adapter.addDataSet(dataSet)
             }
         }
     }
 
+    override fun sendMessage(text: String) {
+        if (!text.isBlank()) {
+            presenter.sendMessage(chatRoomId, text)
+        }
+    }
+
+    override fun showSentMessage(message: Message) {
+        text_message.textContent = ""
+        adapter.addItem(message)
+        recycler_view.smoothScrollToPosition(0)
+    }
+
     override fun showLoading() = view_loading.setVisibility(true)
 
     override fun hideLoading() = view_loading.setVisibility(false)
@@ -90,4 +107,13 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
     override fun showMessage(message: String) = Toast.makeText(activity, message, Toast.LENGTH_SHORT).show()
 
     override fun showGenericErrorMessage() = showMessage(getString(R.string.msg_generic_error))
+
+    private fun setupComposer() {
+        if (isChatRoomOpen) {
+            text_send.setOnClickListener { sendMessage(text_message.textContent) }
+        } else {
+            text_room_is_read_only.setVisibility(true)
+            top_container.setVisibility(false)
+        }
+    }
 }
\ No newline at end of file

app/src/main/res/layout/message_composer.xml

@@ -10,6 +10,17 @@
         android:layout_height="1dp"
         android:background="@color/colorDividerMessageComposer" />
 
+    <TextView
+        android:id="@+id/text_room_is_read_only"
+        android:layout_width="match_parent"
+        android:layout_height="45dp"
+        android:background="@color/white"
+        android:gravity="center"
+        android:text="@string/msg_this_room_is_read_only"
+        android:textColor="@color/black"
+        android:visibility="gone"
+        app:layout_constraintTop_toBottomOf="@+id/divider" />
+
     <LinearLayout
         android:id="@+id/top_container"
         android:layout_width="match_parent"

app/src/main/res/values-pt-rBR/strings.xml

@@ -27,6 +27,7 @@
     <string name="msg_invalid_2fa_code">Código 2FA inválido</string>
     <string name="msg_yesterday">ontem</string>
     <string name="msg_message">Messagem</string>
+    <string name="msg_this_room_is_read_only">Este chat é apenas de leitura</string>
     <string name="msg_content_description_log_in_using_facebook">Fazer login através do Facebook</string>
     <string name="msg_content_description_log_in_using_github">Fazer login através do Github</string>
     <string name="msg_content_description_log_in_using_google">Fazer login através do Google</string>

app/src/main/res/values/strings.xml

@@ -29,6 +29,7 @@
     <string name="msg_more_than_ninety_nine_unread_messages" translatable="false">99+</string>
     <string name="msg_yesterday">Yesterday</string>
     <string name="msg_message">Message</string>
+    <string name="msg_this_room_is_read_only">This room is read only</string>
     <string name="msg_content_description_log_in_using_facebook">Login using Facebook</string>
     <string name="msg_content_description_log_in_using_github">Login using Github</string>
     <string name="msg_content_description_log_in_using_google">Login using Google</string>