* move comment out of `widgets/`

* remove `Widget` suffix from widgets
* change `list.length != 0` to `list.isEmpty`
* convert MarkdownText into stateless widget

lib/comment.dart

@@ -1,14 +1,14 @@
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 
-import 'comment_tree.dart';
-import 'markdown_text.dart';
+import 'widgets/comment_tree.dart';
+import 'widgets/markdown_text.dart';
 
-class CommentWidget extends StatelessWidget {
+class Comment extends StatelessWidget {
   final int indent;
   final int postCreatorId;
   final CommentTree commentTree;
-  CommentWidget(
+  Comment(
     this.commentTree, {
     this.indent = 0,
     @required this.postCreatorId,
@@ -47,8 +47,7 @@ class CommentWidget extends StatelessWidget {
         style: TextStyle(fontStyle: FontStyle.italic),
       ));
     } else {
-      body =
-          Flexible(child: MarkdownText(commentTree.comment.content, context));
+      body = Flexible(child: MarkdownText(commentTree.comment.content));
     }
     return Column(
       children: [
@@ -108,7 +107,7 @@ class CommentWidget extends StatelessWidget {
                   top: BorderSide(width: 0.2))),
         ),
         for (var c in commentTree.children)
-          CommentWidget(
+          Comment(
             c,
             indent: indent + 1,
             postCreatorId: postCreatorId,

lib/widgets/comments.dart

@@ -2,24 +2,25 @@ import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:lemmy_api_client/lemmy_api_client.dart';
 
-import 'comment.dart';
+import '../comment.dart';
 import 'comment_tree.dart';
 
 /// Manages comments section, sorts them
-class CommentsWidget extends HookWidget {
+class Comments extends HookWidget {
   final List<CommentView> rawComments;
   final List<CommentTree> comments;
   final int postCreatorId;
 
-  CommentsWidget(this.rawComments, this.postCreatorId)
-      : comments = CommentTree.fromList(rawComments);
+  Comments(this.rawComments, {@required this.postCreatorId})
+      : comments = CommentTree.fromList(rawComments),
+        assert(postCreatorId != null);
 
   @override
   Widget build(BuildContext context) {
     var sorting = useState(SortType.active);
     return Column(children: [
       // sorting menu goes here
-      if (comments.length == 0)
+      if (comments.isEmpty)
         Padding(
           padding: EdgeInsets.symmetric(vertical: 50),
           child: Text(
@@ -27,8 +28,7 @@ class CommentsWidget extends HookWidget {
             style: TextStyle(fontStyle: FontStyle.italic),
           ),
         ),
-      for (var com in comments)
-        CommentWidget(com, postCreatorId: postCreatorId),
+      for (var com in comments) Comment(com, postCreatorId: postCreatorId),
     ]);
   }
 }

lib/widgets/markdown_text.dart

@@ -1,23 +1,37 @@
+import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:markdown/markdown.dart' as md;
 
 import '../url_launcher.dart';
 
-Widget MarkdownText(String text, BuildContext context) {
-  return MarkdownBody(
-    data: text,
-    extensionSet: md.ExtensionSet.gitHubWeb,
-    onTapLink: (href) {
-      urlLauncher(href)
-          .catchError((e) => Scaffold.of(context).showSnackBar(SnackBar(
-                content: Row(
-                  children: [
-                    Icon(Icons.warning),
-                    Text('couldn\'t open link'),
-                  ],
-                ),
-              )));
-    },
-  );
+class MarkdownText extends StatelessWidget {
+  final String text;
+  MarkdownText(this.text);
+
+  @override
+  Widget build(BuildContext context) => MarkdownBody(
+        data: text,
+        extensionSet: md.ExtensionSet.gitHubWeb,
+        onTapLink: (href) {
+          urlLauncher(href)
+              .catchError((e) => Scaffold.of(context).showSnackBar(SnackBar(
+                    content: Row(
+                      children: [
+                        Icon(Icons.warning),
+                        Text('couldn\'t open link'),
+                      ],
+                    ),
+                  )));
+        },
+        imageBuilder: (uri, title, alt) => CachedNetworkImage(
+          imageUrl: uri.toString(),
+          errorWidget: (context, url, error) => Row(
+            children: [
+              Icon(Icons.warning),
+              Text('couldn\'t load image, ${error.toString()}')
+            ],
+          ),
+        ),
+      );
 }

lib/widgets/post.dart

@@ -25,7 +25,7 @@ MediaType whatType(String url) {
   return MediaType.other;
 }
 
-class PostWidget extends StatelessWidget {
+class Post extends StatelessWidget {
   final PostView post;
   final String hostUrl;
 
@@ -35,7 +35,7 @@ class PostWidget extends StatelessWidget {
   ThemeData _theme;
   BuildContext _context;
 
-  PostWidget(this.post)
+  Post(this.post)
       : hostUrl = post.communityActorId.split('/')[2],
         linkPostDomain = post.url != null ? post.url.split('/')[2] : null;
 
@@ -327,7 +327,7 @@ class PostWidget extends StatelessWidget {
   Widget _textBody() {
     return Padding(
       padding: const EdgeInsets.all(10),
-      child: MarkdownText(post.body, _context),
+      child: MarkdownText(post.body),
     );
   }