Implement direct reply on Android N and above

app/src/main/AndroidManifest.xml

@@ -85,6 +85,15 @@
             </intent-filter>
         </receiver>
 
+        <receiver
+            android:name=".push.DirectReplyReceiver"
+            android:enabled="true"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="chat.rocket.android.ACTION_REPLY" />
+            </intent-filter>
+        </receiver>
+
         <service
             android:name=".push.FirebaseTokenService"
             android:exported="false">

app/src/main/java/chat/rocket/android/dagger/module/ReceiverBuilder.kt

 package chat.rocket.android.dagger.module
 
 import chat.rocket.android.push.DeleteReceiver
+import chat.rocket.android.push.DirectReplyReceiver
+import chat.rocket.android.push.DirectReplyReceiverProvider
 import chat.rocket.android.push.di.DeleteReceiverProvider
 import dagger.Module
 import dagger.android.ContributesAndroidInjector
@@ -10,4 +12,7 @@ abstract class ReceiverBuilder {
 
     @ContributesAndroidInjector(modules = [DeleteReceiverProvider::class])
     abstract fun bindDeleteReceiver(): DeleteReceiver
+
+    @ContributesAndroidInjector(modules = [DirectReplyReceiverProvider::class])
+    abstract fun bindDirectReplyReceiver(): DirectReplyReceiver
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/push/DirectReplyReceiver.kt

+package chat.rocket.android.push
+
+import android.app.NotificationManager
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.support.v4.app.RemoteInput
+import android.widget.Toast
+import chat.rocket.android.R
+import chat.rocket.android.server.infraestructure.ConnectionManagerFactory
+import chat.rocket.common.RocketChatException
+import chat.rocket.core.internal.rest.sendMessage
+import dagger.android.AndroidInjection
+import kotlinx.coroutines.experimental.android.UI
+import kotlinx.coroutines.experimental.launch
+import timber.log.Timber
+import java.util.*
+import javax.inject.Inject
+
+/**
+ * BroadcastReceiver for direct reply on notifications.
+ */
+class DirectReplyReceiver : BroadcastReceiver() {
+
+    @Inject
+    lateinit var factory: ConnectionManagerFactory
+    @Inject
+    lateinit var groupedPushes: GroupedPush
+
+    override fun onReceive(context: Context, intent: Intent) {
+        AndroidInjection.inject(this, context)
+        if (ACTION_REPLY == intent.action) {
+            val message = intent.getParcelableExtra<PushMessage>(EXTRA_PUSH_MESSAGE)
+            message?.let {
+                launch(UI) {
+                    try {
+                        println(it)
+                        sendMessage(it, extractReplyMessage(intent))
+                        val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+                        clearNotificationsByHostAndNotificationId(it.info.host, it.notificationId.toInt())
+                        manager.cancel(it.notificationId.toInt())
+                        val feedback = context.getString(R.string.notif_success_sending, it.title)
+                        Toast.makeText(context, feedback, Toast.LENGTH_SHORT).show()
+                    } catch (ex: RocketChatException) {
+                        Timber.e(ex)
+                        val feedback = context.getString(R.string.notif_error_sending)
+                        Toast.makeText(context, feedback, Toast.LENGTH_SHORT).show()
+                    }
+                }
+            }
+        }
+    }
+
+    private suspend fun sendMessage(message: PushMessage, replyText: CharSequence?) {
+        replyText?.let { reply ->
+            val currentServer = message.info.hostname
+            val roomId = message.info.roomId
+            val connectionManager = factory.create(currentServer)
+            val client = connectionManager.client
+            val id = UUID.randomUUID().toString()
+            client.sendMessage(id, roomId, reply.toString())
+            // Do we need to disconnect here?
+        }
+    }
+
+    private fun extractReplyMessage(intent: Intent): CharSequence? {
+        val bundle = RemoteInput.getResultsFromIntent(intent)
+        if (bundle != null) {
+            return bundle.getCharSequence(REMOTE_INPUT_REPLY)
+        }
+        return null
+    }
+
+    /**
+     * Clear notifications by the host they belong to and its unique id.
+     */
+    private fun clearNotificationsByHostAndNotificationId(host: String, notificationId: Int) {
+        if (groupedPushes.hostToPushMessageList.isNotEmpty()) {
+            val notifications = groupedPushes.hostToPushMessageList[host]
+            notifications?.let {
+                notifications.removeAll {
+                    it.notificationId.toInt() == notificationId
+                }
+            }
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/push/DirectReplyReceiverProvider.kt

+package chat.rocket.android.push
+
+import chat.rocket.android.dagger.module.AppModule
+import dagger.Module
+import dagger.android.ContributesAndroidInjector
+
+@Module
+abstract class DirectReplyReceiverProvider {
+    @ContributesAndroidInjector(modules = [AppModule::class])
+    abstract fun provideDirectReplyReceiver(): DirectReplyReceiver
+}
\ No newline at end of file

app/src/main/res/values-hi-rIN/strings.xml

@@ -177,4 +177,9 @@
     <string name="header_direct_messages">प्रत्यक्ष संदेश</string>
     <string name="header_live_chats">Live Chats</string>
     <string name="header_unknown">अज्ञात</string>
+
+    <!--Notifications-->
+    <string name="notif_action_reply_hint">जवाब</string>
+    <string name="notif_error_sending">उत्तर विफल हुआ है। कृपया फिर से प्रयास करें।</string>
+    <string name="notif_success_sending">संदेश भेजा गया %1$s!</string>
 </resources>
\ No newline at end of file

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

@@ -177,4 +177,9 @@
     <string name="header_direct_messages">Mensagens diretas</string>
     <string name="header_live_chats">Live Chats</string>
     <string name="header_unknown">Desconhecido</string>
+
+    <!--Notifications-->
+    <string name="notif_action_reply_hint">RESPONDER</string>
+    <string name="notif_error_sending">Falha ao enviar a mensagem.</string>
+    <string name="notif_success_sending">Mensagem enviada para %1$s!</string>
 </resources>
\ No newline at end of file

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

@@ -178,4 +178,9 @@
     <string name="header_direct_messages">Direct Messages</string>
     <string name="header_live_chats">Live Chats</string>
     <string name="header_unknown">Unknown</string>
+
+    <!--Notifications-->
+    <string name="notif_action_reply_hint">REPLY</string>
+    <string name="notif_error_sending">Reply has failed. Please try again.</string>
+    <string name="notif_success_sending">Message sent to %1$s!</string>
 </resources>
\ No newline at end of file