feat(mobile): add cast support (#18341)

* initial cast framework complete and mocked cast dialog working

* wip casting

* casting works!

just need to add session key check and remote video controls

* cleanup of classes

* add session expiration checks

* cast dialog now shows connected device at top of list with a list header. Discovered devices are also cached for app session.

* cast video player finalized

* show fullsize assets on casting

* translation already happens on the text element

* remove prints

* fix lintings

* code review changes from @shenlong-tanwen

* fix connect method override

* fix alphabetization

* remove important

* filter chromecast audio devices

* fix some disconnect command ordering issues and unawaited futures

* remove prints

* only disconnect if we are connected

* don't try to reconnect if its the current device

* add cast button to top bar

* format sessions api

* more formatting issues fixed

* add snack bar to tell user that we cannot cast an asset that is not uploaded to server

* make casting icon change to primary color when casting is active

* only show casting snackbar if we are casting

* dont show cast button if asset is remote and we are not casting

* stop playing media if we seek to an asset that is not remote

* remove https check since it works with local http IP addresses

* remove unneeded imports

* fix recasting when socket closes

* fix info plist formatting

* only show cast button if there is an active websocket connection (ie the server is accessible)

* add device capability bitmask checks

* small comment about bitmask

mobile/lib/widgets/asset_viewer/top_control_app_bar.dart

@@ -1,12 +1,16 @@
 import 'package:auto_route/auto_route.dart';
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/providers/activity_statistics.provider.dart';
 import 'package:immich_mobile/providers/album/current_album.provider.dart';
 import 'package:immich_mobile/entities/asset.entity.dart';
 import 'package:immich_mobile/providers/asset.provider.dart';
 import 'package:immich_mobile/providers/routes.provider.dart';
+import 'package:immich_mobile/providers/cast.provider.dart';
 import 'package:immich_mobile/providers/tab.provider.dart';
+import 'package:immich_mobile/providers/websocket.provider.dart';
+import 'package:immich_mobile/widgets/asset_viewer/cast_dialog.dart';
 import 'package:immich_mobile/widgets/asset_viewer/motion_photo_button.dart';
 import 'package:immich_mobile/providers/asset_viewer/current_asset.provider.dart';
 
@@ -44,6 +48,10 @@ class TopControlAppBar extends HookConsumerWidget {
     const double iconSize = 22.0;
     final a = ref.watch(assetWatcher(asset)).value ?? asset;
     final album = ref.watch(currentAlbumProvider);
+    final isCasting = ref.watch(castProvider.select((c) => c.isCasting));
+    final websocketConnected =
+        ref.watch(websocketProvider.select((c) => c.isConnected));
+
     final comments = album != null &&
             album.remoteId != null &&
             asset.remoteId != null
@@ -169,6 +177,22 @@ class TopControlAppBar extends HookConsumerWidget {
       );
     }
 
+    Widget buildCastButton() {
+      return IconButton(
+        onPressed: () {
+          showDialog(
+            context: context,
+            builder: (context) => const CastDialog(),
+          );
+        },
+        icon: Icon(
+          isCasting ? Icons.cast_connected_rounded : Icons.cast_rounded,
+          size: 20.0,
+          color: isCasting ? context.primaryColor : Colors.grey[200],
+        ),
+      );
+    }
+
     bool isInHomePage = ref.read(tabProvider.notifier).state == TabEnum.home;
     bool? isInTrash = ref.read(currentAssetProvider)?.isTrashed;
 
@@ -193,6 +217,8 @@ class TopControlAppBar extends HookConsumerWidget {
             !asset.isTrashed &&
             !isInLockedView)
           buildAddToAlbumButton(),
+        if (isCasting || (asset.isRemote && websocketConnected))
+          buildCastButton(),
         if (asset.isTrashed) buildRestoreButton(),
         if (album != null && album.shared && !isInLockedView)
           buildActivitiesButton(),