fix: Allow joining of unpublished aliases again

lib/utils/url_launcher.dart

@@ -35,7 +35,6 @@ class UrlLauncher {
       // we got a room! Let's open that one
       final roomIdOrAlias = identityParts.primaryIdentifier;
       final event = identityParts.secondaryIdentifier;
-      final query = identityParts.queryString;
       var room = matrix.client.getRoomByAlias(roomIdOrAlias) ??
           matrix.client.getRoomById(roomIdOrAlias);
       var roomId = room?.id;
@@ -49,26 +48,15 @@ class UrlLauncher {
           future: () =>
               matrix.client.requestRoomAliasInformations(roomIdOrAlias),
         );
-        if (response.error == null) {
-          roomId = response.result.roomId;
-          servers.addAll(response.result.servers);
-          room = matrix.client.getRoomById(roomId);
+        if (response.error != null) {
+          return; // nothing to do, the alias doesn't exist
         }
+        roomId = response.result.roomId;
+        servers.addAll(response.result.servers);
+        room = matrix.client.getRoomById(roomId);
       }
-      if (query != null) {
-        // the query information might hold additional servers to try, so let's try them!
-        // as there might be multiple "via" tags we can't just use Uri.splitQueryString, we need to do our own thing
-        for (final parameter in query.split('&')) {
-          final index = parameter.indexOf('=');
-          if (index == -1) {
-            continue;
-          }
-          if (Uri.decodeQueryComponent(parameter.substring(0, index)) !=
-              'via') {
-            continue;
-          }
-          servers.add(Uri.decodeQueryComponent(parameter.substring(index + 1)));
-        }
+      if (identityParts.via != null) {
+        servers.addAll(identityParts.via);
       }
       if (room != null) {
         // we have the room, so....just open it!

lib/views/discover_view.dart

@@ -116,10 +116,25 @@ class _DiscoverPageState extends State<DiscoverPage> {
     final server = _genericSearchTerm?.isValidMatrixId ?? false
         ? _genericSearchTerm.domain
         : _server;
-    _publicRoomsResponse ??= Matrix.of(context).client.searchPublicRooms(
+    _publicRoomsResponse ??= Matrix.of(context)
+        .client
+        .searchPublicRooms(
           server: server,
           genericSearchTerm: _genericSearchTerm,
-        );
+        )
+        .then((PublicRoomsResponse res) {
+      if (widget.alias != null &&
+          !res.chunk.any((room) =>
+              room.aliases.contains(widget.alias) ||
+              room.canonicalAlias == widget.alias)) {
+        // we have to tack on the original alias
+        res.chunk.add(PublicRoom.fromJson(<String, dynamic>{
+          'aliases': [widget.alias],
+          'name': widget.alias,
+        }));
+      }
+      return res;
+    });
     return Scaffold(
       appBar: AppBar(
         leading: BackButton(),