ComposeActivity refactor (#1541)

* Convert ComposeActivity to Kotlin

* More ComposeActivity cleanups

* Move ComposeActivity to it's own package

* Remove ComposeActivity.IntentBuilder

* Re-do part of the media downsizing/uploading

* Add sending of status to ViewModel, draft media descriptions

* Allow uploading video, update description after uploading

* Enable camera, enable upload cancelling

* Cleanup of ComposeActivity

* Extract CaptionDialog, extract ComposeActivity methods

* Fix handling of redrafted media

* Add initial state and media uploading out of Activity

* Change ComposeOptions.mentionedUsernames to be Set rather than List

We probably don't want repeated usernames when we are writing a post
and Set provides such guarantee for free plus it tells it to the
callers. The only disadvantage is lack of order but it shouldn't be a
problem.

* Add combineOptionalLiveData. Add docs.

It it useful for nullable LiveData's. I think we cannot differentiate
between value not being set and value being null so I just added the
variant without null check.

* Add poll support to Compose.

* cleanup code

* move more classes into compose package

* cleanup code

* fix button behavior

* add error handling for media upload

* add caching for instance data again

* merge develop

* fix scheduled toots

* delete unused string

* cleanup ComposeActivity

* fix restoring media from drafts

* make media upload code a little bit clearer

* cleanup autocomplete search code

* avoid duplicate object creation in SavedTootActivity

* perf: avoid unnecessary work when initializing ComposeActivity

* add license header to new files

* use small toot button on bigger displays

* fix ComposeActivityTest

* fix bad merge

* use Singles.zip instead of Single.zip

app/src/main/java/com/keylesspalace/tusky/di/ActivitiesModule.kt

@@ -16,6 +16,7 @@
 package com.keylesspalace.tusky.di
 
 import com.keylesspalace.tusky.*
+import com.keylesspalace.tusky.components.compose.ComposeActivity
 import com.keylesspalace.tusky.components.instancemute.InstanceListActivity
 import com.keylesspalace.tusky.components.report.ReportActivity
 import com.keylesspalace.tusky.components.search.SearchActivity

app/src/main/java/com/keylesspalace/tusky/di/AppComponent.kt

@@ -35,7 +35,8 @@ import javax.inject.Singleton
     ServicesModule::class,
     BroadcastReceiverModule::class,
     ViewModelModule::class,
-    RepositoryModule::class
+    RepositoryModule::class,
+    MediaUploaderModule::class
 ])
 interface AppComponent {
     @Component.Builder

app/src/main/java/com/keylesspalace/tusky/di/MediaUploaderModule.kt

@@ -0,0 +1,30 @@
+/* Copyright 2019 Tusky Contributors
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.di
+
+import android.content.Context
+import com.keylesspalace.tusky.components.compose.MediaUploader
+import com.keylesspalace.tusky.components.compose.MediaUploaderImpl
+import com.keylesspalace.tusky.network.MastodonApi
+import dagger.Module
+import dagger.Provides
+
+@Module
+class MediaUploaderModule {
+    @Provides
+    fun providesMediaUploder(context: Context, mastodonApi: MastodonApi): MediaUploader =
+            MediaUploaderImpl(context, mastodonApi)
+}

app/src/main/java/com/keylesspalace/tusky/di/ServicesModule.kt

@@ -15,12 +15,25 @@
 
 package com.keylesspalace.tusky.di
 
+import android.content.Context
 import com.keylesspalace.tusky.service.SendTootService
+import com.keylesspalace.tusky.service.ServiceClient
+import com.keylesspalace.tusky.service.ServiceClientImpl
 import dagger.Module
+import dagger.Provides
 import dagger.android.ContributesAndroidInjector
 
 @Module
 abstract class ServicesModule {
     @ContributesAndroidInjector
     abstract fun contributesSendTootService(): SendTootService
+
+    @Module
+    companion object {
+        @Provides
+        @JvmStatic
+        fun providesServiceClient(context: Context): ServiceClient {
+            return ServiceClientImpl(context)
+        }
+    }
 }

app/src/main/java/com/keylesspalace/tusky/di/ViewModelFactory.kt

@@ -4,10 +4,13 @@ package com.keylesspalace.tusky.di
 
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
+import com.keylesspalace.tusky.components.compose.ComposeViewModel
 import com.keylesspalace.tusky.components.conversation.ConversationsViewModel
 import com.keylesspalace.tusky.components.report.ReportViewModel
 import com.keylesspalace.tusky.components.search.SearchViewModel
-import com.keylesspalace.tusky.viewmodel.*
+import com.keylesspalace.tusky.viewmodel.AccountViewModel
+import com.keylesspalace.tusky.viewmodel.AccountsInListViewModel
+import com.keylesspalace.tusky.viewmodel.EditProfileViewModel
 import com.keylesspalace.tusky.viewmodel.ListsViewModel
 import dagger.Binds
 import dagger.MapKey
@@ -71,5 +74,10 @@ abstract class ViewModelModule {
     @ViewModelKey(SearchViewModel::class)
     internal abstract fun searchViewModel(viewModel: SearchViewModel): ViewModel
 
+    @Binds
+    @IntoMap
+    @ViewModelKey(ComposeViewModel::class)
+    internal abstract fun composeViewModel(viewModel: ComposeViewModel): ViewModel
+
     //Add more ViewModels here
 }