118 - Implement shared album feature (#124)

* New features 
  - Share album. Users can now create albums to share with existing people on the network.
  - Owner can delete the album.
  - Owner can invite the additional users to the album.
  - Shared users and the owner can add additional assets to the album.
* In the asset viewer, the user can swipe up to see detailed information and swip down to dismiss.
* Several UI enhancements.

mobile/lib/routing/router.gr.dart

@@ -57,6 +57,42 @@ class _$AppRouter extends RootStackRouter {
           routeData: routeData,
           child: SearchResultPage(key: args.key, searchTerm: args.searchTerm));
     },
+    CreateSharedAlbumRoute.name: (routeData) {
+      return MaterialPageX<dynamic>(
+          routeData: routeData, child: const CreateSharedAlbumPage());
+    },
+    AssetSelectionRoute.name: (routeData) {
+      return CustomPage<AssetSelectionPageResult?>(
+          routeData: routeData,
+          child: const AssetSelectionPage(),
+          transitionsBuilder: TransitionsBuilders.slideBottom,
+          opaque: true,
+          barrierDismissible: false);
+    },
+    SelectUserForSharingRoute.name: (routeData) {
+      return CustomPage<List<String>>(
+          routeData: routeData,
+          child: const SelectUserForSharingPage(),
+          transitionsBuilder: TransitionsBuilders.slideBottom,
+          opaque: true,
+          barrierDismissible: false);
+    },
+    AlbumViewerRoute.name: (routeData) {
+      final args = routeData.argsAs<AlbumViewerRouteArgs>();
+      return MaterialPageX<dynamic>(
+          routeData: routeData,
+          child: AlbumViewerPage(key: args.key, albumId: args.albumId));
+    },
+    SelectAdditionalUserForSharingRoute.name: (routeData) {
+      final args = routeData.argsAs<SelectAdditionalUserForSharingRouteArgs>();
+      return CustomPage<List<String>?>(
+          routeData: routeData,
+          child: SelectAdditionalUserForSharingPage(
+              key: args.key, albumInfo: args.albumInfo),
+          transitionsBuilder: TransitionsBuilders.slideBottom,
+          opaque: true,
+          barrierDismissible: false);
+    },
     HomeRoute.name: (routeData) {
       return MaterialPageX<dynamic>(
           routeData: routeData, child: const HomePage());
@@ -66,6 +102,10 @@ class _$AppRouter extends RootStackRouter {
           orElse: () => const SearchRouteArgs());
       return MaterialPageX<dynamic>(
           routeData: routeData, child: SearchPage(key: args.key));
+    },
+    SharingRoute.name: (routeData) {
+      return MaterialPageX<dynamic>(
+          routeData: routeData, child: const SharingPage());
     }
   };
 
@@ -85,6 +125,10 @@ class _$AppRouter extends RootStackRouter {
               RouteConfig(SearchRoute.name,
                   path: 'search-page',
                   parent: TabControllerRoute.name,
+                  guards: [authGuard]),
+              RouteConfig(SharingRoute.name,
+                  path: 'sharing-page',
+                  parent: TabControllerRoute.name,
                   guards: [authGuard])
             ]),
         RouteConfig(ImageViewerRoute.name,
@@ -94,7 +138,18 @@ class _$AppRouter extends RootStackRouter {
         RouteConfig(BackupControllerRoute.name,
             path: '/backup-controller-page', guards: [authGuard]),
         RouteConfig(SearchResultRoute.name,
-            path: '/search-result-page', guards: [authGuard])
+            path: '/search-result-page', guards: [authGuard]),
+        RouteConfig(CreateSharedAlbumRoute.name,
+            path: '/create-shared-album-page', guards: [authGuard]),
+        RouteConfig(AssetSelectionRoute.name,
+            path: '/asset-selection-page', guards: [authGuard]),
+        RouteConfig(SelectUserForSharingRoute.name,
+            path: '/select-user-for-sharing-page', guards: [authGuard]),
+        RouteConfig(AlbumViewerRoute.name,
+            path: '/album-viewer-page', guards: [authGuard]),
+        RouteConfig(SelectAdditionalUserForSharingRoute.name,
+            path: '/select-additional-user-for-sharing-page',
+            guards: [authGuard])
       ];
 }
 
@@ -223,6 +278,86 @@ class SearchResultRouteArgs {
   }
 }
 
+/// generated route for
+/// [CreateSharedAlbumPage]
+class CreateSharedAlbumRoute extends PageRouteInfo<void> {
+  const CreateSharedAlbumRoute()
+      : super(CreateSharedAlbumRoute.name, path: '/create-shared-album-page');
+
+  static const String name = 'CreateSharedAlbumRoute';
+}
+
+/// generated route for
+/// [AssetSelectionPage]
+class AssetSelectionRoute extends PageRouteInfo<void> {
+  const AssetSelectionRoute()
+      : super(AssetSelectionRoute.name, path: '/asset-selection-page');
+
+  static const String name = 'AssetSelectionRoute';
+}
+
+/// generated route for
+/// [SelectUserForSharingPage]
+class SelectUserForSharingRoute extends PageRouteInfo<void> {
+  const SelectUserForSharingRoute()
+      : super(SelectUserForSharingRoute.name,
+            path: '/select-user-for-sharing-page');
+
+  static const String name = 'SelectUserForSharingRoute';
+}
+
+/// generated route for
+/// [AlbumViewerPage]
+class AlbumViewerRoute extends PageRouteInfo<AlbumViewerRouteArgs> {
+  AlbumViewerRoute({Key? key, required String albumId})
+      : super(AlbumViewerRoute.name,
+            path: '/album-viewer-page',
+            args: AlbumViewerRouteArgs(key: key, albumId: albumId));
+
+  static const String name = 'AlbumViewerRoute';
+}
+
+class AlbumViewerRouteArgs {
+  const AlbumViewerRouteArgs({this.key, required this.albumId});
+
+  final Key? key;
+
+  final String albumId;
+
+  @override
+  String toString() {
+    return 'AlbumViewerRouteArgs{key: $key, albumId: $albumId}';
+  }
+}
+
+/// generated route for
+/// [SelectAdditionalUserForSharingPage]
+class SelectAdditionalUserForSharingRoute
+    extends PageRouteInfo<SelectAdditionalUserForSharingRouteArgs> {
+  SelectAdditionalUserForSharingRoute(
+      {Key? key, required SharedAlbum albumInfo})
+      : super(SelectAdditionalUserForSharingRoute.name,
+            path: '/select-additional-user-for-sharing-page',
+            args: SelectAdditionalUserForSharingRouteArgs(
+                key: key, albumInfo: albumInfo));
+
+  static const String name = 'SelectAdditionalUserForSharingRoute';
+}
+
+class SelectAdditionalUserForSharingRouteArgs {
+  const SelectAdditionalUserForSharingRouteArgs(
+      {this.key, required this.albumInfo});
+
+  final Key? key;
+
+  final SharedAlbum albumInfo;
+
+  @override
+  String toString() {
+    return 'SelectAdditionalUserForSharingRouteArgs{key: $key, albumInfo: $albumInfo}';
+  }
+}
+
 /// generated route for
 /// [HomePage]
 class HomeRoute extends PageRouteInfo<void> {
@@ -251,3 +386,11 @@ class SearchRouteArgs {
     return 'SearchRouteArgs{key: $key}';
   }
 }
+
+/// generated route for
+/// [SharingPage]
+class SharingRoute extends PageRouteInfo<void> {
+  const SharingRoute() : super(SharingRoute.name, path: 'sharing-page');
+
+  static const String name = 'SharingRoute';
+}