Merge pull request #1073 from RocketChat/new/offline-sending

[IMPROVEMENT] Offline message sending support

app/src/main/AndroidManifest.xml

@@ -102,13 +102,18 @@
                 <action android:name="com.google.android.c2dm.intent.RECEIVE" />
             </intent-filter>
         </service>
+        <service
+            android:name=".chatroom.service.MessageService"
+            android:exported="true"
+            android:permission="android.permission.BIND_JOB_SERVICE" />
 
         <meta-data
             android:name="io.fabric.ApiKey"
             android:value="12ac6e94f850aaffcdff52001af77ca415d06a43" />
 
-        <activity android:name=".settings.about.ui.AboutActivity"
-            android:theme="@style/AppTheme"/>
+        <activity
+            android:name=".settings.about.ui.AboutActivity"
+            android:theme="@style/AppTheme" />
     </application>
 
 </manifest>

app/src/main/java/chat/rocket/android/authentication/server/presentation/ServerPresenter.kt

@@ -16,6 +16,7 @@ class ServerPresenter @Inject constructor(private val view: ServerView,
                                           private val serverInteractor: SaveCurrentServerInteractor,
                                           private val refreshSettingsInteractor: RefreshSettingsInteractor,
                                           private val getAccountsInteractor: GetAccountsInteractor) {
+
     fun connect(server: String) {
         if (!server.isValidUrl()) {
             view.showInvalidServerUrlMessage()

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

@@ -117,12 +117,22 @@ class ChatRoomAdapter(
     }
 
     fun prependData(dataSet: List<BaseViewModel<*>>) {
-        val item = dataSet.firstOrNull { newItem ->
+        val item = dataSet.indexOfFirst { newItem ->
             this.dataSet.indexOfFirst { it.messageId == newItem.messageId && it.viewType == newItem.viewType } > -1
         }
-        if (item == null) {
+        if (item == -1) {
             this.dataSet.addAll(0, dataSet)
             notifyItemRangeInserted(0, dataSet.size)
+        } else {
+            dataSet.forEach { item ->
+                val index = this.dataSet.indexOfFirst {
+                    item.messageId == it.messageId && item.viewType == it.viewType
+                }
+                if (index > -1) {
+                    this.dataSet[index] = item
+                    notifyItemChanged(index)
+                }
+            }
         }
     }
 

app/src/main/java/chat/rocket/android/chatroom/adapter/MessageViewHolder.kt

 package chat.rocket.android.chatroom.adapter
 
+import android.graphics.Color
 import android.text.method.LinkMovementMethod
 import android.view.View
 import chat.rocket.android.chatroom.viewmodel.MessageViewModel
@@ -29,6 +30,9 @@ class MessageViewHolder(
             text_sender.text = data.senderName
             text_content.text = data.content
             image_avatar.setImageURI(data.avatar)
+            text_content.setTextColor(
+                if (data.isTemporary) Color.GRAY else Color.BLACK
+            )
         }
     }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/di/MessageServiceProvider.kt

+package chat.rocket.android.chatroom.di
+
+import chat.rocket.android.chatroom.service.MessageService
+import chat.rocket.android.dagger.module.AppModule
+import dagger.Module
+import dagger.android.ContributesAndroidInjector
+
+@Module abstract class MessageServiceProvider {
+    @ContributesAndroidInjector(modules = [AppModule::class])
+    abstract fun provideMessageService(): MessageService
+}
\ No newline at end of file

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

@@ -92,10 +92,8 @@ interface ChatRoomView : LoadingView, MessageView {
 
     /**
      * Enables the send message button.
-     *
-     * @param sendFailed Whether the sent message has failed.
      */
-    fun enableSendMessageButton(sendFailed: Boolean)
+    fun enableSendMessageButton()
 
     /**
      * Clears the message composition.

app/src/main/java/chat/rocket/android/chatroom/service/MessageService.kt

+package chat.rocket.android.chatroom.service
+
+import android.app.job.JobParameters
+import android.app.job.JobService
+import chat.rocket.android.server.domain.CurrentServerRepository
+import chat.rocket.android.server.domain.MessagesRepository
+import chat.rocket.android.server.infraestructure.ConnectionManagerFactory
+import chat.rocket.common.RocketChatException
+import chat.rocket.core.internal.rest.sendMessage
+import chat.rocket.core.model.Message
+import dagger.android.AndroidInjection
+import kotlinx.coroutines.experimental.CommonPool
+import kotlinx.coroutines.experimental.launch
+import timber.log.Timber
+import javax.inject.Inject
+
+class MessageService : JobService() {
+    @Inject
+    lateinit var factory: ConnectionManagerFactory
+    @Inject
+    lateinit var currentServerRepository: CurrentServerRepository
+    @Inject
+    lateinit var messageRepository: MessagesRepository
+
+    override fun onCreate() {
+        super.onCreate()
+        AndroidInjection.inject(this)
+    }
+
+    override fun onStopJob(params: JobParameters?): Boolean {
+        return false
+    }
+
+    override fun onStartJob(params: JobParameters?): Boolean {
+        launch(CommonPool) {
+            val currentServer = currentServerRepository.get()
+            if (currentServer != null) {
+                retrySendingMessages(params, currentServer)
+                jobFinished(params, false)
+            }
+        }
+        return true
+    }
+
+    private suspend fun retrySendingMessages(params: JobParameters?, currentServer: String) {
+        val temporaryMessages = messageRepository.getAllUnsent()
+            .sortedWith(compareBy(Message::timestamp))
+        if (temporaryMessages.isNotEmpty()) {
+            val connectionManager = factory.create(currentServer)
+            val client = connectionManager.client
+            temporaryMessages.forEach { message ->
+                try {
+                    client.sendMessage(
+                        message = message.message,
+                        messageId = message.id,
+                        roomId = message.roomId,
+                        avatar = message.avatar,
+                        attachments = message.attachments,
+                        alias = message.senderAlias
+                    )
+                    messageRepository.save(message.copy(isTemporary = false))
+                    Timber.d("Sent scheduled message given by id: ${message.id}")
+                } catch (ex: RocketChatException) {
+                    Timber.e(ex)
+                    if (ex.message?.contains("E11000", true) == true) {
+                        // XXX: Temporary solution. We need proper error codes from the api.
+                        messageRepository.save(message.copy(isTemporary = false))
+                    }
+                    jobFinished(params, true)
+                }
+            }
+        }
+    }
+
+    companion object {
+        const val RETRY_SEND_MESSAGE_ID = 1
+    }
+}
\ No newline at end of file

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

@@ -4,7 +4,6 @@ import android.Manifest
 import android.app.Activity
 import android.content.ClipData
 import android.content.ClipboardManager
-import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
@@ -70,8 +69,10 @@ private const val BUNDLE_CHAT_ROOM_LAST_SEEN = "chat_room_last_seen"
 private const val BUNDLE_CHAT_ROOM_IS_SUBSCRIBED = "chat_room_is_subscribed"
 
 class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiReactionListener {
-    @Inject lateinit var presenter: ChatRoomPresenter
-    @Inject lateinit var parser: MessageParser
+    @Inject
+    lateinit var presenter: ChatRoomPresenter
+    @Inject
+    lateinit var parser: MessageParser
     private lateinit var adapter: ChatRoomAdapter
     private lateinit var chatRoomId: String
     private lateinit var chatRoomName: String
@@ -207,7 +208,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
 
             if (recycler_view.adapter == null) {
                 adapter = ChatRoomAdapter(chatRoomType, chatRoomName, presenter,
-                        reactionListener = this@ChatRoomFragment)
+                    reactionListener = this@ChatRoomFragment)
                 recycler_view.adapter = adapter
                 if (dataSet.size >= 30) {
                     recycler_view.addOnScrollListener(endlessRecyclerViewScrollListener)
@@ -316,16 +317,15 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
         }
     }
 
-    override fun enableSendMessageButton(sendFailed: Boolean) {
+    override fun enableSendMessageButton() {
         ui {
             button_send.isEnabled = true
             text_message.isEnabled = true
-            if (!sendFailed) {
-                clearMessageComposition()
-            }
+            clearMessageComposition()
         }
     }
 
+
     override fun clearMessageComposition() {
         ui {
             citation = null
@@ -408,7 +408,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
 
     override fun copyToClipboard(message: String) {
         ui {
-            val clipboard: ClipboardManager  = it.systemService()
+            val clipboard: ClipboardManager = it.systemService()
             clipboard.primaryClip = ClipData.newPlainText("", message)
         }
     }
@@ -469,10 +469,10 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
     override fun showFileSelection(filter: Array<String>) {
         ui {
             if (ContextCompat.checkSelfPermission(it, Manifest.permission.READ_EXTERNAL_STORAGE)
-                    != PackageManager.PERMISSION_GRANTED) {
+                != PackageManager.PERMISSION_GRANTED) {
                 ActivityCompat.requestPermissions(it,
-                        arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
-                        1)
+                    arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
+                    1)
             } else {
                 val intent = Intent(Intent.ACTION_GET_CONTENT)
                 intent.type = "*/*"
@@ -536,7 +536,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
         recycler_view.layoutManager = linearLayoutManager
         recycler_view.itemAnimator = DefaultItemAnimator()
         endlessRecyclerViewScrollListener = object :
-                EndlessRecyclerViewScrollListener(recycler_view.layoutManager as LinearLayoutManager) {
+            EndlessRecyclerViewScrollListener(recycler_view.layoutManager as LinearLayoutManager) {
             override fun onLoadMore(page: Int, totalItemsCount: Int, recyclerView: RecyclerView?) {
                 presenter.loadMessages(chatRoomId, chatRoomType, page * 30L)
             }
@@ -589,6 +589,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
                 var textMessage = citation ?: ""
                 textMessage += text_message.textContent
                 sendMessage(textMessage)
+                clearMessageComposition()
             }
 
             button_show_attachment_options.setOnClickListener {
@@ -621,23 +622,23 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
 
     private fun setupSuggestionsView() {
         suggestions_view.anchorTo(text_message)
-                .setMaximumHeight(resources.getDimensionPixelSize(R.dimen.suggestions_box_max_height))
-                .addTokenAdapter(PeopleSuggestionsAdapter(context!!))
-                .addTokenAdapter(CommandSuggestionsAdapter())
-                .addTokenAdapter(RoomSuggestionsAdapter())
-                .addSuggestionProviderAction("@") { query ->
-                    if (query.isNotEmpty()) {
-                        presenter.spotlight(query, PEOPLE, true)
-                    }
+            .setMaximumHeight(resources.getDimensionPixelSize(R.dimen.suggestions_box_max_height))
+            .addTokenAdapter(PeopleSuggestionsAdapter(context!!))
+            .addTokenAdapter(CommandSuggestionsAdapter())
+            .addTokenAdapter(RoomSuggestionsAdapter())
+            .addSuggestionProviderAction("@") { query ->
+                if (query.isNotEmpty()) {
+                    presenter.spotlight(query, PEOPLE, true)
                 }
-                .addSuggestionProviderAction("#") { query ->
-                    if (query.isNotEmpty()) {
-                        presenter.loadChatRooms()
-                    }
-                }
-                .addSuggestionProviderAction("/") { _ ->
-                    presenter.loadCommands()
+            }
+            .addSuggestionProviderAction("#") { query ->
+                if (query.isNotEmpty()) {
+                    presenter.loadChatRooms()
                 }
+            }
+            .addSuggestionProviderAction("/") { _ ->
+                presenter.loadCommands()
+            }
 
         presenter.loadCommands()
     }
@@ -672,7 +673,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
 
     private fun subscribeTextMessage() {
         val disposable = text_message.asObservable(0)
-                .subscribe({ t -> setupComposeMessageButtons(t) })
+            .subscribe({ t -> setupComposeMessageButtons(t) })
 
         compositeDisposable.add(disposable)
     }

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

@@ -13,7 +13,8 @@ data class AudioAttachmentViewModel(
         override val id: Long,
         override var reactions: List<ReactionViewModel>,
         override var nextDownStreamMessage: BaseViewModel<*>? = null,
-        override var preview: Message? = null
+        override var preview: Message? = null,
+        override var isTemporary: Boolean = false
 ) : BaseFileAttachmentViewModel<AudioAttachment> {
     override val viewType: Int
         get() = BaseViewModel.ViewType.AUDIO_ATTACHMENT.viewType

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

@@ -5,17 +5,18 @@ import chat.rocket.core.model.Message
 import chat.rocket.core.model.attachment.AuthorAttachment
 
 data class AuthorAttachmentViewModel(
-    override val attachmentUrl: String,
-    val id: Long,
-    val name: CharSequence?,
-    val icon: String?,
-    val fields: CharSequence?,
-    override val message: Message,
-    override val rawData: AuthorAttachment,
-    override val messageId: String,
-    override var reactions: List<ReactionViewModel>,
-    override var nextDownStreamMessage: BaseViewModel<*>? = null,
-    override var preview: Message? = null
+        override val attachmentUrl: String,
+        val id: Long,
+        val name: CharSequence?,
+        val icon: String?,
+        val fields: CharSequence?,
+        override val message: Message,
+        override val rawData: AuthorAttachment,
+        override val messageId: String,
+        override var reactions: List<ReactionViewModel>,
+        override var nextDownStreamMessage: BaseViewModel<*>? = null,
+        override var preview: Message? = null,
+        override var isTemporary: Boolean = false
 ) : BaseAttachmentViewModel<AuthorAttachment> {
     override val viewType: Int
         get() = BaseViewModel.ViewType.AUTHOR_ATTACHMENT.viewType

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

@@ -12,6 +12,7 @@ interface BaseViewModel<out T> {
     var reactions: List<ReactionViewModel>
     var nextDownStreamMessage: BaseViewModel<*>?
     var preview: Message?
+    var isTemporary: Boolean
 
     enum class ViewType(val viewType: Int) {
         MESSAGE(0),

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

@@ -13,7 +13,8 @@ data class ImageAttachmentViewModel(
         override val id: Long,
         override var reactions: List<ReactionViewModel>,
         override var nextDownStreamMessage: BaseViewModel<*>? = null,
-        override var preview: Message? = null
+        override var preview: Message? = null,
+        override var isTemporary: Boolean = false
 ) : BaseFileAttachmentViewModel<ImageAttachment> {
     override val viewType: Int
         get() = BaseViewModel.ViewType.IMAGE_ATTACHMENT.viewType

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

@@ -14,7 +14,8 @@ data class MessageAttachmentViewModel(
         override var reactions: List<ReactionViewModel>,
         override var nextDownStreamMessage: BaseViewModel<*>? = null,
         var messageLink: String? = null,
-        override var preview: Message? = null
+        override var preview: Message? = null,
+        override var isTemporary: Boolean = false
 ) : BaseViewModel<Message> {
     override val viewType: Int
         get() = BaseViewModel.ViewType.MESSAGE_ATTACHMENT.viewType

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

@@ -15,7 +15,8 @@ data class MessageViewModel(
         override var reactions: List<ReactionViewModel>,
         override var nextDownStreamMessage: BaseViewModel<*>? = null,
         override var preview: Message? = null,
-        var isFirstUnread: Boolean
+        var isFirstUnread: Boolean,
+        override var isTemporary: Boolean = false
 ) : BaseMessageViewModel<Message> {
     override val viewType: Int
         get() = BaseViewModel.ViewType.MESSAGE.viewType

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

@@ -14,7 +14,8 @@ data class UrlPreviewViewModel(
         val thumbUrl: String?,
         override var reactions: List<ReactionViewModel>,
         override var nextDownStreamMessage: BaseViewModel<*>? = null,
-        override var preview: Message? = null
+        override var preview: Message? = null,
+        override var isTemporary: Boolean = false
 ) : BaseViewModel<Url> {
     override val viewType: Int
         get() = BaseViewModel.ViewType.URL_PREVIEW.viewType

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

@@ -13,7 +13,8 @@ data class VideoAttachmentViewModel(
         override val id: Long,
         override var reactions: List<ReactionViewModel>,
         override var nextDownStreamMessage: BaseViewModel<*>? = null,
-        override var preview: Message? = null
+        override var preview: Message? = null,
+        override var isTemporary: Boolean = false
 ) : BaseFileAttachmentViewModel<VideoAttachment> {
     override val viewType: Int
         get() = BaseViewModel.ViewType.VIDEO_ATTACHMENT.viewType

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

@@ -212,12 +212,13 @@ class ViewModelMapper @Inject constructor(private val context: Context,
         val time = getTime(message.timestamp)
         val avatar = getUserAvatar(message)
         val preview = mapMessagePreview(message)
+        val isTemp = message.isTemporary ?: false
 
         val content = getContent(stripMessageQuotes(message))
         MessageViewModel(message = stripMessageQuotes(message), rawData = message,
                 messageId = message.id, avatar = avatar!!, time = time, senderName = sender,
                 content = content, isPinned = message.pinned, reactions = getReactions(message),
-                isFirstUnread = false, preview = preview)
+                isFirstUnread = false, preview = preview, isTemporary = isTemp)
     }
 
     private suspend fun mapMessagePreview(message: Message): Message {

app/src/main/java/chat/rocket/android/dagger/AppComponent.kt

@@ -2,6 +2,7 @@ package chat.rocket.android.dagger
 
 import android.app.Application
 import chat.rocket.android.app.RocketChatApplication
+import chat.rocket.android.chatroom.service.MessageService
 import chat.rocket.android.dagger.module.ActivityBuilder
 import chat.rocket.android.dagger.module.AppModule
 import chat.rocket.android.dagger.module.ReceiverBuilder
@@ -29,6 +30,8 @@ interface AppComponent {
 
     fun inject(service: FirebaseTokenService)
 
+    fun inject(service: MessageService)
+
     /*@Component.Builder
     abstract class Builder : AndroidInjector.Builder<RocketChatApplication>()*/
 }

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

@@ -2,7 +2,10 @@ package chat.rocket.android.dagger.module
 
 import android.app.Application
 import android.app.NotificationManager
+import android.app.job.JobInfo
+import android.app.job.JobScheduler
 import android.arch.persistence.room.Room
+import android.content.ComponentName
 import android.content.Context
 import android.content.SharedPreferences
 import androidx.core.content.systemService
@@ -11,6 +14,7 @@ import chat.rocket.android.R
 import chat.rocket.android.app.RocketChatDatabase
 import chat.rocket.android.authentication.infraestructure.SharedPreferencesMultiServerTokenRepository
 import chat.rocket.android.authentication.infraestructure.SharedPreferencesTokenRepository
+import chat.rocket.android.chatroom.service.MessageService
 import chat.rocket.android.dagger.qualifier.ForFresco
 import chat.rocket.android.helper.FrescoAuthInterceptor
 import chat.rocket.android.helper.MessageParser
@@ -19,19 +23,17 @@ import chat.rocket.android.infrastructure.SharedPrefsLocalRepository
 import chat.rocket.android.push.GroupedPush
 import chat.rocket.android.push.PushManager
 import chat.rocket.android.server.domain.*
-import chat.rocket.android.server.infraestructure.MemoryChatRoomsRepository
-import chat.rocket.android.server.infraestructure.MemoryMessagesRepository
-import chat.rocket.android.server.infraestructure.MemoryRoomRepository
-import chat.rocket.android.server.infraestructure.MemoryUsersRepository
-import chat.rocket.android.server.infraestructure.ServerDao
-import chat.rocket.android.server.infraestructure.SharedPreferencesAccountsRepository
-import chat.rocket.android.server.infraestructure.SharedPreferencesSettingsRepository
-import chat.rocket.android.server.infraestructure.SharedPrefsCurrentServerRepository
+import chat.rocket.android.server.infraestructure.*
 import chat.rocket.android.util.AppJsonAdapterFactory
 import chat.rocket.android.util.TimberLogger
 import chat.rocket.common.internal.FallbackSealedClassJsonAdapter
+import chat.rocket.common.internal.ISO8601Date
+import chat.rocket.common.model.TimestampAdapter
+import chat.rocket.common.util.CalendarISO8601Converter
+import chat.rocket.common.util.Logger
 import chat.rocket.common.util.PlatformLogger
 import chat.rocket.core.RocketChatClient
+import chat.rocket.core.internal.AttachmentAdapterFactory
 import com.facebook.drawee.backends.pipeline.DraweeConfig
 import com.facebook.imagepipeline.backends.okhttp3.OkHttpImagePipelineConfigFactory
 import com.facebook.imagepipeline.core.ImagePipelineConfig
@@ -121,7 +123,7 @@ class AppModule {
     @Provides
     @ForFresco
     @Singleton
-    fun provideFrescoAuthIntercepter(tokenRepository: TokenRepository, currentServerInteractor: GetCurrentServerInteractor): Interceptor {
+    fun provideFrescoAuthInterceptor(tokenRepository: TokenRepository, currentServerInteractor: GetCurrentServerInteractor): Interceptor {
         return FrescoAuthInterceptor(tokenRepository, currentServerInteractor)
     }
 
@@ -202,10 +204,16 @@ class AppModule {
 
     @Provides
     @Singleton
-    fun provideMoshi(): Moshi {
+    fun provideMoshi(logger: PlatformLogger,
+                     currentServerInteractor: GetCurrentServerInteractor):
+            Moshi {
+        val url = currentServerInteractor.get() ?: ""
         return Moshi.Builder()
                 .add(FallbackSealedClassJsonAdapter.ADAPTER_FACTORY)
                 .add(AppJsonAdapterFactory.INSTANCE)
+                .add(AttachmentAdapterFactory(Logger(logger, url)))
+                .add(java.lang.Long::class.java, ISO8601Date::class.java, TimestampAdapter(CalendarISO8601Converter()))
+                .add(Long::class.java, ISO8601Date::class.java, TimestampAdapter(CalendarISO8601Converter()))
                 .build()
     }
 
@@ -217,8 +225,9 @@ class AppModule {
 
     @Provides
     @Singleton
-    fun provideMessageRepository(): MessagesRepository {
-        return MemoryMessagesRepository()
+    fun provideMessageRepository(context: Application, moshi: Moshi, currentServerInteractor: GetCurrentServerInteractor): MessagesRepository {
+        val preferences = context.getSharedPreferences("messages", Context.MODE_PRIVATE)
+        return SharedPreferencesMessagesRepository(preferences, moshi, currentServerInteractor)
     }
 
     @Provides
@@ -278,4 +287,22 @@ class AppModule {
             getSettingsInteractor: GetSettingsInteractor): PushManager {
         return PushManager(groupedPushes, manager, moshi, getAccountInteractor, getSettingsInteractor, context)
     }
+
+    @Provides
+    fun provideJobScheduler(context: Application): JobScheduler {
+        return context.getSystemService(Context.JOB_SCHEDULER_SERVICE) as JobScheduler
+    }
+
+    @Provides
+    fun provideSendMessageJob(context: Application): JobInfo {
+        return JobInfo.Builder(MessageService.RETRY_SEND_MESSAGE_ID,
+                ComponentName(context, MessageService::class.java))
+                .setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
+                .build()
+    }
+
+    @Provides
+    fun provideJobSchedulerInteractor(jobScheduler: JobScheduler, jobInfo: JobInfo): JobSchedulerInteractor {
+        return JobSchedulerInteractorImpl(jobScheduler, jobInfo)
+    }
 }
\ No newline at end of file

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

 package chat.rocket.android.dagger.module
 
+import chat.rocket.android.chatroom.di.MessageServiceProvider
+import chat.rocket.android.chatroom.service.MessageService
 import chat.rocket.android.push.FirebaseTokenService
 import chat.rocket.android.push.GcmListenerService
 import chat.rocket.android.push.di.FirebaseTokenServiceProvider
@@ -14,4 +16,7 @@ import dagger.android.ContributesAndroidInjector
 
     @ContributesAndroidInjector(modules = [GcmListenerServiceProvider::class])
     abstract fun bindGcmListenerService(): GcmListenerService
+
+    @ContributesAndroidInjector(modules = [MessageServiceProvider::class])
+    abstract fun bindMessageService(): MessageService
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/infrastructure/LocalRepository.kt

@@ -24,4 +24,5 @@ interface LocalRepository {
     }
 }
 
-fun LocalRepository.checkIfMyself(username: String) = get(LocalRepository.CURRENT_USERNAME_KEY) == username
\ No newline at end of file
+fun LocalRepository.checkIfMyself(username: String) = username() == username
+fun LocalRepository.username() = get(LocalRepository.CURRENT_USERNAME_KEY)
\ No newline at end of file

app/src/main/java/chat/rocket/android/main/presentation/MainPresenter.kt

@@ -23,26 +23,24 @@ import chat.rocket.core.internal.rest.logout
 import chat.rocket.core.internal.rest.me
 import chat.rocket.core.internal.rest.unregisterPushToken
 import chat.rocket.core.model.Myself
-import kotlinx.coroutines.experimental.CommonPool
 import kotlinx.coroutines.experimental.channels.Channel
-import kotlinx.coroutines.experimental.launch
 import timber.log.Timber
 import javax.inject.Inject
 
 class MainPresenter @Inject constructor(
-        private val view: MainView,
-        private val strategy: CancelStrategy,
-        private val navigator: MainNavigator,
-        private val tokenRepository: TokenRepository,
-        private val serverInteractor: GetCurrentServerInteractor,
-        private val localRepository: LocalRepository,
-        private val navHeaderMapper: NavHeaderViewModelMapper,
-        private val saveAccountInteractor: SaveAccountInteractor,
-        private val getAccountsInteractor: GetAccountsInteractor,
-        private val removeAccountInterector: RemoveAccountInterector,
-        private val factory: RocketChatClientFactory,
-        getSettingsInteractor: GetSettingsInteractor,
-        managerFactory: ConnectionManagerFactory
+    private val view: MainView,
+    private val strategy: CancelStrategy,
+    private val navigator: MainNavigator,
+    private val tokenRepository: TokenRepository,
+    private val serverInteractor: GetCurrentServerInteractor,
+    private val localRepository: LocalRepository,
+    private val navHeaderMapper: NavHeaderViewModelMapper,
+    private val saveAccountInteractor: SaveAccountInteractor,
+    private val getAccountsInteractor: GetAccountsInteractor,
+    private val removeAccountInteractor: RemoveAccountInteractor,
+    private val factory: RocketChatClientFactory,
+    getSettingsInteractor: GetSettingsInteractor,
+    managerFactory: ConnectionManagerFactory
 ) : CheckServerPresenter(strategy, client = factory.create(serverInteractor.get()!!), view = view) {
     private val currentServer = serverInteractor.get()!!
     private val manager = managerFactory.create(currentServer)
@@ -105,7 +103,7 @@ class MainPresenter @Inject constructor(
 
             try {
                 disconnect()
-                removeAccountInterector.remove(currentServer)
+                removeAccountInteractor.remove(currentServer)
                 tokenRepository.remove(currentServer)
                 navigator.toNewServer()
             } catch (ex: Exception) {

app/src/main/java/chat/rocket/android/server/domain/JobSchedulerInteractor.kt

+package chat.rocket.android.server.domain
+
+interface JobSchedulerInteractor {
+    /**
+     * Schedule job to retry previously failed sending messages.
+     */
+    fun scheduleSendingMessages()
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/server/domain/MessagesRepository.kt

@@ -11,7 +11,7 @@ interface MessagesRepository {
      *
      * @return The Message object given by the id or null if message wasn't found.
      */
-    fun getById(id: String): Message?
+    suspend fun getById(id: String): Message?
 
     /**
      * Get all messages from the current room id.
@@ -19,7 +19,7 @@ interface MessagesRepository {
      * @param rid The room id.
      * @return A list of Message objects for the room with given room id or an empty list.
      */
-    fun getByRoomId(rid: String): List<Message>
+    suspend fun getByRoomId(rid: String): List<Message>
 
     /**
      * Get most recent messages up to count different users.
@@ -29,43 +29,47 @@ interface MessagesRepository {
      *
      * @return List of last count messages.
      */
-    fun getRecentMessages(rid: String, count: Long): List<Message>
+    suspend fun getRecentMessages(rid: String, count: Long): List<Message>
 
     /**
      * Get all messages. Use carefully!
      *
      * @return All messages or an empty list.
      */
-    fun getAll(): List<Message>
+    suspend fun getAll(): List<Message>
 
     /**
      * Save a single message object.
      *
      * @param The message object to saveAll.
      */
-    fun save(message: Message)
+    suspend fun save(message: Message)
 
     /**
      * Save a list of messages.
      */
-    fun saveAll(newMessages: List<Message>)
+    suspend fun saveAll(newMessages: List<Message>)
 
     /**
      * Removes all messages.
      */
-    fun clear()
+    suspend fun clear()
 
     /**
      * Remove message by id.
      *
      * @param id The id of the message to remove.
      */
-    fun removeById(id: String)
+    suspend fun removeById(id: String)
 
     /**
      * Remove all messages from a given room.
      *
      * @param rid The room id where messages are to be removed.
      */
-    fun removeByRoomId(rid: String)
+    suspend fun removeByRoomId(rid: String)
+
+    suspend fun getAllUnsent(): List<Message>
+
+    suspend fun getUnsentByRoomId(roomId: String): List<Message>
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/server/domain/RemoveAccountInterector.kt → app/src/main/java/chat/rocket/android/server/domain/RemoveAccountInteractor.kt

@@ -2,7 +2,7 @@ package chat.rocket.android.server.domain
 
 import javax.inject.Inject
 
-class RemoveAccountInterector @Inject constructor(val repository: AccountsRepository) {
+class RemoveAccountInteractor @Inject constructor(val repository: AccountsRepository) {
     suspend fun remove(serverUrl: String) {
         repository.remove(serverUrl)
     }

app/src/main/java/chat/rocket/android/server/infraestructure/JobSchedulerInteractorImpl.kt

+package chat.rocket.android.server.infraestructure
+
+import android.app.job.JobInfo
+import android.app.job.JobScheduler
+import chat.rocket.android.server.domain.JobSchedulerInteractor
+import timber.log.Timber
+import javax.inject.Inject
+
+/**
+ * Uses the Android framework [JobScheduler].
+ */
+class JobSchedulerInteractorImpl @Inject constructor(
+    private val jobScheduler: JobScheduler,
+    private val jobInfo: JobInfo
+) : JobSchedulerInteractor {
+
+    override fun scheduleSendingMessages() {
+        Timber.d("Scheduling unsent messages to send...")
+        jobScheduler.schedule(jobInfo)
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/server/infraestructure/MemoryMessagesRepository.kt

@@ -2,45 +2,67 @@ package chat.rocket.android.server.infraestructure
 
 import chat.rocket.android.server.domain.MessagesRepository
 import chat.rocket.core.model.Message
+import kotlinx.coroutines.experimental.CommonPool
+import kotlinx.coroutines.experimental.withContext
 
 class MemoryMessagesRepository : MessagesRepository {
 
     private val messages: HashMap<String, Message> = HashMap()
 
-    override fun getById(id: String): Message? {
-        return messages[id]
+    override suspend fun getById(id: String): Message? = withContext(CommonPool) {
+        return@withContext messages[id]
     }
 
-    override fun getByRoomId(rid: String): List<Message> {
-        return messages.filter { it.value.roomId == rid }.values.toList()
+    override suspend fun getByRoomId(rid: String): List<Message> = withContext(CommonPool) {
+        return@withContext messages.filter { it.value.roomId == rid }.values.toList()
     }
 
-    override fun getRecentMessages(rid: String, count: Long): List<Message> {
-        return getByRoomId(rid).sortedByDescending { it.timestamp }
+    override suspend fun getRecentMessages(rid: String, count: Long): List<Message> = withContext(CommonPool) {
+        return@withContext getByRoomId(rid).sortedByDescending { it.timestamp }
                 .distinctBy { it.sender }.take(count.toInt())
     }
 
-    override fun getAll(): List<Message> = messages.values.toList()
+    override suspend fun getAll(): List<Message> = withContext(CommonPool) {
+        return@withContext messages.values.toList()
+    }
+
+    override suspend fun getUnsentByRoomId(roomId: String): List<Message> = withContext(CommonPool) {
+        val allByRoomId = getByRoomId(roomId)
+        if (allByRoomId.isEmpty()) {
+            return@withContext emptyList<Message>()
+        }
+        return@withContext allByRoomId.filter { it.isTemporary ?: false && it.roomId == roomId }
+    }
 
-    override fun save(message: Message) {
+    override suspend fun getAllUnsent(): List<Message> = withContext(CommonPool) {
+        val all = getAll()
+        if (all.isEmpty()) {
+            return@withContext emptyList<Message>()
+        }
+        return@withContext all.filter { it.isTemporary ?: false }
+    }
+
+    override suspend fun save(message: Message) = withContext(CommonPool) {
         messages[message.id] = message
     }
 
-    override fun saveAll(newMessages: List<Message>) {
+    override suspend fun saveAll(newMessages: List<Message>) = withContext(CommonPool) {
         for (msg in newMessages) {
             messages[msg.id] = msg
         }
     }
 
-    override fun clear() {
+    override suspend fun clear() = withContext(CommonPool) {
         messages.clear()
     }
 
-    override fun removeById(id: String) {
-        messages.remove(id)
+    override suspend fun removeById(id: String) {
+        withContext(CommonPool) {
+            messages.remove(id)
+        }
     }
 
-    override fun removeByRoomId(rid: String) {
+    override suspend fun removeByRoomId(rid: String) = withContext(CommonPool) {
         val roomMessages = messages.filter { it.value.roomId == rid }.values
         roomMessages.forEach {
             messages.remove(it.roomId)

app/src/main/java/chat/rocket/android/server/infraestructure/SharedPreferencesMessagesRepository.kt

+package chat.rocket.android.server.infraestructure
+
+import android.content.SharedPreferences
+import chat.rocket.android.server.domain.GetCurrentServerInteractor
+import chat.rocket.android.server.domain.MessagesRepository
+import chat.rocket.core.model.Message
+import com.squareup.moshi.Moshi
+import kotlinx.coroutines.experimental.CommonPool
+import kotlinx.coroutines.experimental.withContext
+
+class SharedPreferencesMessagesRepository(
+    private val prefs: SharedPreferences,
+    private val moshi: Moshi,
+    private val currentServerInteractor: GetCurrentServerInteractor
+) : MessagesRepository {
+
+    override suspend fun getById(id: String): Message? = withContext(CommonPool) {
+        currentServerInteractor.get()?.also { server ->
+            if (prefs.all.values.isEmpty()) {
+                return@withContext null
+            }
+            val adapter = moshi.adapter<Message>(Message::class.java)
+            val values = prefs.all.entries.filter { it.key.startsWith(server) }
+                .map { it.value } as Collection<String>
+            return@withContext values.map { adapter.fromJson(it) }.firstOrNull { it?.id == id }
+        }
+        return@withContext null
+    }
+
+    override suspend fun getByRoomId(rid: String): List<Message> = withContext(CommonPool) {
+        currentServerInteractor.get()?.also { server ->
+            val adapter = moshi.adapter<Message>(Message::class.java)
+            if (prefs.all.values.isEmpty()) {
+                return@withContext emptyList<Message>()
+            }
+            val values = prefs.all.entries.filter { it.key.startsWith(server) }
+                .map { it.value } as Collection<String>
+            return@withContext values.mapNotNull { adapter.fromJson(it) }.filter {
+                it.roomId == rid
+            }.toList().sortedWith(compareBy(Message::timestamp)).reversed()
+        }
+        return@withContext emptyList<Message>()
+    }
+
+    override suspend fun getRecentMessages(rid: String, count: Long): List<Message> = withContext(CommonPool) {
+        return@withContext getByRoomId(rid).sortedByDescending { it.timestamp }
+            .distinctBy { it.sender }.take(count.toInt())
+    }
+
+    override suspend fun getAll(): List<Message> = withContext(CommonPool) {
+        val adapter = moshi.adapter<Message>(Message::class.java)
+        if (prefs.all.values.isEmpty()) {
+            return@withContext emptyList<Message>()
+        }
+        currentServerInteractor.get()?.also { server ->
+            val values = prefs.all.entries.filter { it.key.startsWith(server) }
+                .map { it.value } as Collection<String>
+            return@withContext values.mapNotNull { adapter.fromJson(it) }
+        }
+        return@withContext emptyList<Message>()
+    }
+
+    override suspend fun getAllUnsent(): List<Message> = withContext(CommonPool) {
+        if (prefs.all.values.isEmpty()) {
+            return@withContext emptyList<Message>()
+        }
+        currentServerInteractor.get()?.also { server ->
+            val values = prefs.all.entries.filter { it.key.startsWith(server) }
+                .map { it.value } as Collection<String>
+            val adapter = moshi.adapter<Message>(Message::class.java)
+            return@withContext values.mapNotNull { adapter.fromJson(it) }
+                .filter { it.isTemporary ?: false }
+        }
+        return@withContext emptyList<Message>()
+    }
+
+    override suspend fun getUnsentByRoomId(roomId: String): List<Message> = withContext(CommonPool) {
+        val allByRoomId = getByRoomId(roomId)
+        if (allByRoomId.isEmpty()) {
+            return@withContext emptyList<Message>()
+        }
+        return@withContext allByRoomId.filter { it.isTemporary ?: false }
+    }
+
+    override suspend fun save(message: Message) {
+        withContext(CommonPool) {
+            currentServerInteractor.get()?.also {
+                val adapter = moshi.adapter<Message>(Message::class.java)
+                prefs.edit().putString("${it}_${message.id}", adapter.toJson(message)).apply()
+            }
+        }
+    }
+
+    override suspend fun saveAll(newMessages: List<Message>) {
+        withContext(CommonPool) {
+            currentServerInteractor.get()?.also {
+                val adapter = moshi.adapter<Message>(Message::class.java)
+                val editor = prefs.edit()
+                for (msg in newMessages) {
+                    editor.putString("${it}_${msg.id}", adapter.toJson(msg))
+                }
+                editor.apply()
+            }
+        }
+    }
+
+    override suspend fun clear() = withContext(CommonPool) {
+        prefs.edit().clear().apply()
+    }
+
+    override suspend fun removeById(id: String) {
+        withContext(CommonPool) {
+            currentServerInteractor.get()?.also {
+                prefs.edit().putString("${it}_$id", null).apply()
+            }
+        }
+    }
+
+    override suspend fun removeByRoomId(rid: String) {
+        withContext(CommonPool) {
+            currentServerInteractor.get()?.also { server ->
+                val adapter = moshi.adapter<Message>(Message::class.java)
+                val editor = prefs.edit()
+                prefs.all.entries.forEach {
+                    val value = it.value
+                    if (value is String) {
+                        val message = adapter.fromJson(value)
+                        if (message?.roomId == rid) {
+                            editor.putString("${server}_${message.id}", null)
+                        }
+                    }
+                }
+                editor.apply()
+            }
+        }
+    }
+}
\ No newline at end of file