neon: Fix articles without URLs

packages/neon/lib/src/apps/news/blocs/article.dart

@@ -64,7 +64,6 @@ class NewsArticleBloc extends $NewsArticleBloc {
 
     _unreadSubject.add(article.unread);
     _starredSubject.add(article.starred);
-    url = article.url;
   }
 
   void _wrapArticleAction(final Future Function() call) {
@@ -79,7 +78,6 @@ class NewsArticleBloc extends $NewsArticleBloc {
   final NextcloudClient _client;
   final NewsArticlesBloc _newsArticlesBloc;
 
-  late final String url;
   final _unreadSubject = BehaviorSubject<bool>();
   final _starredSubject = BehaviorSubject<bool>();
   final _errorsStreamController = StreamController<Exception>();

packages/neon/lib/src/apps/news/pages/article.dart

@@ -6,13 +6,16 @@ class NewsArticlePage extends StatefulWidget {
     required this.articlesBloc,
     required this.useWebView,
     this.bodyData,
+    this.url,
     super.key,
-  }) : assert(useWebView || bodyData != null, 'bodyData has to be set when not using a WebView');
+  })  : assert(useWebView || bodyData != null, 'bodyData has to be set when not using a WebView'),
+        assert(!useWebView || url != null, 'url has to be set when using a WebView');
 
   final NewsArticleBloc bloc;
   final NewsArticlesBloc articlesBloc;
   final bool useWebView;
   final String? bodyData;
+  final String? url;
 
   @override
   State<NewsArticlePage> createState() => _NewsArticlePageState();
@@ -75,7 +78,7 @@ class _NewsArticlePageState extends State<NewsArticlePage> {
       return (await _webviewController!.currentUrl())!;
     }
 
-    return widget.bloc.url;
+    return widget.url!;
   }
 
   @override
@@ -129,6 +132,7 @@ class _NewsArticlePageState extends State<NewsArticlePage> {
                   );
                 },
               ),
+              if (widget.url != null) ...[
                 IconButton(
                   onPressed: () async {
                     await launchUrlString(
@@ -145,6 +149,7 @@ class _NewsArticlePageState extends State<NewsArticlePage> {
                   icon: const Icon(Icons.share),
                 ),
               ],
+            ],
           ),
           body: widget.useWebView
               ? Stack(
@@ -155,7 +160,7 @@ class _NewsArticlePageState extends State<NewsArticlePage> {
                       javascriptMode: JavascriptMode.unrestricted,
                       onWebViewCreated: (final controller) async {
                         _webviewController = controller;
-                        await controller.loadUrl(widget.bloc.url);
+                        await controller.loadUrl(widget.url!);
                       },
                       onPageStarted: (final _) {
                         setState(() {

packages/neon/lib/src/apps/news/widgets/articles_view.dart

@@ -218,7 +218,7 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
             debugPrint(s.toString());
           }
 
-          if (viewType == ArticleViewType.direct && bodyData != null) {
+          if ((viewType == ArticleViewType.direct || article.url == null) && bodyData != null) {
             await Navigator.of(context).push(
               MaterialPageRoute(
                 builder: (final context) => NewsArticlePage(
@@ -231,11 +231,13 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
                   articlesBloc: widget.bloc,
                   useWebView: false,
                   bodyData: bodyData,
+                  url: article.url,
                 ),
               ),
             );
-          } else if (Provider.of<NeonPlatform>(context, listen: false).canUseWebView &&
+          } else if (viewType == ArticleViewType.internalBrowser &&
-              viewType == ArticleViewType.internalBrowser) {
+              article.url != null &&
+              Provider.of<NeonPlatform>(context, listen: false).canUseWebView) {
             await Navigator.of(context).push(
               MaterialPageRoute(
                 builder: (final context) => NewsArticlePage(
@@ -247,6 +249,7 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
                   ),
                   articlesBloc: widget.bloc,
                   useWebView: true,
+                  url: article.url,
                 ),
               ),
             );
@@ -254,11 +257,13 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
             if (article.unread) {
               bloc.markArticleAsRead(article);
             }
+            if (article.url != null) {
               await launchUrlString(
-              article.url,
+                article.url!,
                 mode: LaunchMode.externalApplication,
               );
             }
+          }
         },
       );