Merge pull request #37 from krawieck/link-handling

lib/pages/communities_list.dart

@@ -31,7 +31,10 @@ class CommunitiesListPage extends StatelessWidget {
             subtitle: communities[i].description != null
                 ? Opacity(
                     opacity: 0.5,
-                    child: MarkdownText(communities[i].description),
+                    child: MarkdownText(
+                      communities[i].description,
+                      instanceUrl: communities[i].instanceUrl,
+                    ),
                   )
                 : null,
             onTap: () => goToCommunity.byId(

lib/pages/community.dart

@@ -433,7 +433,8 @@ class _AboutTab extends StatelessWidget {
         if (community.description != null) ...[
           Padding(
             padding: const EdgeInsets.symmetric(horizontal: 15),
-            child: MarkdownText(community.description),
+            child: MarkdownText(community.description,
+                instanceUrl: community.instanceUrl),
           ),
           _Divider(),
         ],

lib/pages/instance.dart

@@ -208,7 +208,9 @@ class InstancePage extends HookWidget {
                   Center(child: Text('comments go here')),
                 ],
               ),
-              _AboutTab(site, communitiesFuture: communitiesFuture),
+              _AboutTab(site,
+                  communitiesFuture: communitiesFuture,
+                  instanceUrl: instanceUrl),
             ],
           ),
         ),
@@ -241,9 +243,12 @@ class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate {
 class _AboutTab extends HookWidget {
   final FullSiteView site;
   final Future<List<CommunityView>> communitiesFuture;
+  final String instanceUrl;
 
-  const _AboutTab(this.site, {@required this.communitiesFuture})
-      : assert(communitiesFuture != null);
+  const _AboutTab(this.site,
+      {@required this.communitiesFuture, @required this.instanceUrl})
+      : assert(communitiesFuture != null),
+        assert(instanceUrl != null);
 
   void goToUser(int id) {
     print('GO TO USER $id');
@@ -280,7 +285,10 @@ class _AboutTab extends HookWidget {
           children: [
             Padding(
               padding: const EdgeInsets.symmetric(horizontal: 15, vertical: 15),
-              child: MarkdownText(site.site.description),
+              child: MarkdownText(
+                site.site.description,
+                instanceUrl: instanceUrl,
+              ),
             ),
             _Divider(),
             SizedBox(
@@ -356,7 +364,9 @@ class _AboutTab extends HookWidget {
                           e.preferredUsername.isEmpty)
                       ? '@${e.name}'
                       : e.preferredUsername),
-                  subtitle: e.bio != null ? MarkdownText(e.bio) : null,
+                  subtitle: e.bio != null
+                      ? MarkdownText(e.bio, instanceUrl: instanceUrl)
+                      : null,
                   onTap: () => goToUser(e.id),
                   leading: e.avatar != null
                       ? CachedNetworkImage(

lib/pages/user.dart

@@ -18,6 +18,15 @@ class UserPage extends HookWidget {
             .getUserDetails(
                 userId: userId, savedOnly: true, sort: SortType.active)
             .then((res) => res.user);
+  UserPage.fromName({@required this.instanceUrl, @required String username})
+      : assert(instanceUrl != null),
+        assert(username != null),
+        userId = null,
+        _userView = LemmyApi(instanceUrl)
+            .v1
+            .getUserDetails(
+                username: username, savedOnly: true, sort: SortType.active)
+            .then((res) => res.user);
 
   @override
   Widget build(BuildContext context) {

lib/pages/users_list.dart

@@ -2,6 +2,7 @@ import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:lemmy_api_client/lemmy_api_client.dart';
 
+import '../util/api_extensions.dart';
 import '../widgets/markdown_text.dart';
 
 class UsersListPage extends StatelessWidget {
@@ -35,7 +36,10 @@ class UsersListPage extends StatelessWidget {
             subtitle: users[i].bio != null
                 ? Opacity(
                     opacity: 0.5,
-                    child: MarkdownText(users[i].bio),
+                    child: MarkdownText(
+                      users[i].bio,
+                      instanceUrl: users[i].instanceUrl,
+                    ),
                   )
                 : null,
             onTap: () => goToUser(context, users[i].id),

lib/url_launcher.dart

@@ -1,8 +1,113 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 import 'package:url_launcher/url_launcher.dart' as ul;
 
-Future<void> urlLauncher(String url) async {
+import 'pages/community.dart';
+import 'pages/full_post.dart';
+import 'pages/instance.dart';
+import 'pages/user.dart';
+import 'stores/accounts_store.dart';
+
+Future<void> linkLauncher({
+  @required BuildContext context,
+  @required String url,
+  @required String instanceUrl,
+}) async {
+  push(Widget Function() builder) {
+    Navigator.of(context).push(MaterialPageRoute(builder: (c) => builder()));
+  }
+
+  final instances = context.read<AccountsStore>().users.keys.toList();
+
+  final chonks = url.split('/');
+
+  // CHECK IF LINK TO USER
+  if (chonks[1] == 'u') {
+    return push(
+        () => UserPage.fromName(instanceUrl: instanceUrl, username: chonks[2]));
+  }
+
+  // CHECK IF LINK TO COMMUNITY
+  if (chonks[1] == 'c') {
+    return push(() => CommunityPage.fromName(
+        communityName: chonks[2], instanceUrl: instanceUrl));
+  }
+
+  // CHECK IF REDIRECTS TO A PAGE ON ONE OF ADDED INSTANCES
+
+  final instanceRegex = RegExp(r'^(?:https?:\/\/)?([\w\.-]+)(.*)$');
+  final match = instanceRegex.firstMatch(url);
+
+  final matchedInstance = match?.group(1);
+  final rest = match?.group(2);
+
+  if (matchedInstance != null && instances.any((e) => e == match.group(1))) {
+    if (rest.isEmpty || rest == '/') {
+      return push(() => InstancePage(instanceUrl: matchedInstance));
+    }
+    final split = rest.split('/');
+    switch (split[1]) {
+      case 'c':
+        return push(() => CommunityPage.fromName(
+            communityName: split[2], instanceUrl: matchedInstance));
+
+      case 'u':
+        return push(() => UserPage.fromName(
+            instanceUrl: matchedInstance, username: split[2]));
+
+      case 'post':
+        if (split.length == 3) {
+          return push(() => FullPostPage(
+              id: int.parse(split[2]), instanceUrl: matchedInstance));
+        } else if (split.length == 5) {
+          // TODO: post with focus on comment thread
+          print('comment in post');
+          return;
+        }
+        break;
+
+      case 'pictrs':
+        // TODO: put here push to media view
+        print('pictrs');
+        return;
+
+      case 'communities':
+        // TODO: put here push to communities page
+        print('communities');
+        return;
+
+      case 'modlog':
+        // TODO: put here push to modlog
+        print('modlog');
+        return;
+      case 'inbox':
+        // TODO: put here push to inbox
+        print('inbox');
+        return;
+      case 'search':
+        // TODO: *maybe* put here push to search. we'll see
+        //        how much web version differs form the app
+        print('search');
+        return;
+      case 'create_post':
+      case 'create_community':
+      case 'sponsors':
+      case 'instances':
+      case 'docs':
+        break;
+      default:
+        break;
+    }
+  }
+
+  // FALLBACK TO REGULAR LINK STUFF
+
+  return openInBrowser(url);
+}
+
+Future<void> openInBrowser(String url) async {
   if (await ul.canLaunch(url)) {
-    await ul.launch(url);
+    return await ul.launch(url);
   } else {
     throw Exception();
     // TODO: handle opening links to stuff in app

lib/widgets/comment.dart

@@ -169,7 +169,9 @@ class Comment extends StatelessWidget {
           style: TextStyle(fontStyle: FontStyle.italic),
         ));
       } else {
-        return Flexible(child: MarkdownText(commentTree.comment.content));
+        return Flexible(
+            child: MarkdownText(commentTree.comment.content,
+                instanceUrl: commentTree.comment.instanceUrl));
       }
     }();
 

lib/widgets/markdown_text.dart

@@ -6,20 +6,22 @@ import 'package:markdown/markdown.dart' as md;
 import '../url_launcher.dart';
 
 class MarkdownText extends StatelessWidget {
+  final String instanceUrl;
   final String text;
-  MarkdownText(this.text);
+  MarkdownText(this.text, {@required this.instanceUrl})
+      : assert(instanceUrl != null);
 
   @override
   Widget build(BuildContext context) => MarkdownBody(
         data: text,
         extensionSet: md.ExtensionSet.gitHubWeb,
         onTapLink: (href) {
-          urlLauncher(href)
+          linkLauncher(context: context, url: href, instanceUrl: instanceUrl)
               .catchError((e) => Scaffold.of(context).showSnackBar(SnackBar(
                     content: Row(
                       children: [
                         Icon(Icons.warning),
-                        Text("couldn't open link"),
+                        Text("couldn't open link, ${e.toString()}"),
                       ],
                     ),
                   )));

lib/widgets/post.dart

@@ -40,8 +40,6 @@ class Post extends StatelessWidget {
 
   // == ACTIONS ==
 
-  void _openLink() => urlLauncher(post.url);
-
   void _openFullImage() {
     // TODO: fullscreen media view
     print('OPEN FULL IMAGE');
@@ -146,6 +144,8 @@ class Post extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    void _openLink() =>
+        linkLauncher(context: context, url: post.url, instanceUrl: instanceUrl);
 
     final urlDomain = () {
       if (post.url == null) return null;
@@ -438,7 +438,7 @@ class Post extends StatelessWidget {
             if (post.body != null)
               Padding(
                   padding: const EdgeInsets.all(10),
-                  child: MarkdownText(post.body)),
+                  child: MarkdownText(post.body, instanceUrl: instanceUrl)),
             actions(),
           ],
         ),