✨ Better sticker & able embed attachment into markdown

lib/widgets/attachments/attachment_list.dart

@@ -322,3 +322,50 @@ class AttachmentListEntry extends StatelessWidget {
     );
   }
 }
+
+class AttachmentSelfContainedEntry extends StatefulWidget {
+  final int id;
+  final String parentId;
+  final bool isDense;
+
+  const AttachmentSelfContainedEntry({
+    super.key,
+    required this.id,
+    required this.parentId,
+    this.isDense = false,
+  });
+
+  @override
+  State<AttachmentSelfContainedEntry> createState() =>
+      _AttachmentSelfContainedEntryState();
+}
+
+class _AttachmentSelfContainedEntryState
+    extends State<AttachmentSelfContainedEntry> {
+  bool _showMature = false;
+
+  @override
+  Widget build(BuildContext context) {
+    final AttachmentProvider attachments = Get.find();
+
+    return FutureBuilder(
+      future: attachments.getMetadata(widget.id),
+      builder: (context, snapshot) {
+        if (!snapshot.hasData) {
+          return const Text('Loading...');
+        }
+
+        return AttachmentListEntry(
+          item: snapshot.data,
+          isDense: widget.isDense,
+          parentId: widget.parentId,
+          showMature: _showMature,
+          showBorder: true,
+          onReveal: (value) {
+            setState(() => _showMature = value);
+          },
+        );
+      },
+    );
+  }
+}

lib/widgets/chat/chat_event_message.dart

@@ -43,7 +43,11 @@ class ChatEventMessage extends StatelessWidget {
       );
     }
 
-    return MarkdownTextContent(content: body.text);
+    return MarkdownTextContent(
+      parentId: 'm${item.id}',
+      isSelectable: true,
+      content: body.text,
+    );
   }
 
   Widget _buildBody(BuildContext context) {

lib/widgets/markdown_text_content.dart

@@ -1,20 +1,25 @@
+import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_markdown_selectionarea/flutter_markdown.dart';
 import 'package:get/get.dart';
 import 'package:markdown/markdown.dart' as markdown;
 import 'package:markdown/markdown.dart';
+import 'package:solian/platform.dart';
 import 'package:solian/providers/stickers.dart';
+import 'package:solian/widgets/attachments/attachment_list.dart';
 import 'package:url_launcher/url_launcher_string.dart';
 
 import 'account/account_profile_popup.dart';
 
 class MarkdownTextContent extends StatelessWidget {
   final String content;
+  final String parentId;
   final bool isSelectable;
 
   const MarkdownTextContent({
     super.key,
     required this.content,
+    required this.parentId,
     this.isSelectable = false,
   });
 
@@ -42,6 +47,7 @@ class MarkdownTextContent extends StatelessWidget {
           _UserNameCardInlineSyntax(),
           _CustomEmoteInlineSyntax(),
           markdown.EmojiSyntax(),
+          markdown.AutolinkSyntax(),
           markdown.AutolinkExtensionSyntax(),
           ...markdown.ExtensionSet.gitHubFlavored.inlineSyntaxes
         ],
@@ -70,6 +76,38 @@ class MarkdownTextContent extends StatelessWidget {
           mode: LaunchMode.externalApplication,
         );
       },
+      imageBuilder: (uri, title, alt) {
+        var url = uri.toString();
+        double? width, height;
+        if (url.startsWith('solink://')) {
+          final segments = url.replaceFirst('solink://', '').split('/');
+          switch (segments[0]) {
+            case 'stickers':
+              final StickerProvider sticker = Get.find();
+              url = sticker.aliasImageMapping[segments[1]]!;
+              width = 28;
+              height = 28;
+              break;
+            case 'attachments':
+              const radius = BorderRadius.all(Radius.circular(8));
+              return LimitedBox(
+                maxHeight: 360,
+                child: ClipRRect(
+                  borderRadius: radius,
+                  child: AttachmentSelfContainedEntry(
+                    isDense: true,
+                    parentId: parentId,
+                    id: int.parse(segments[1]),
+                  ),
+                ),
+              ).paddingSymmetric(vertical: 4);
+          }
+        }
+
+        return PlatformInfo.canCacheImage
+            ? CachedNetworkImage(imageUrl: url, width: width, height: height)
+            : Image.network(url, width: width, height: height);
+      },
     );
   }
 
@@ -111,7 +149,7 @@ class _CustomEmoteInlineSyntax extends InlineSyntax {
     }
 
     final element = markdown.Element.empty('img');
-    element.attributes['src'] = sticker.aliasImageMapping[alias]!;
+    element.attributes['src'] = 'solink://stickers/$alias';
     parser.addNode(element);
 
     return true;

lib/widgets/posts/post_item.dart

@@ -295,6 +295,7 @@ class _PostItemState extends State<PostItem> {
                     setState(() => _contentHeight = size.height);
                   },
                   child: MarkdownTextContent(
+                    parentId: 'p${item.id}',
                     content: item.body['content'],
                     isSelectable: widget.isContentSelectable,
                   ).paddingOnly(
@@ -389,6 +390,7 @@ class _PostItemState extends State<PostItem> {
                               setState(() => _contentHeight = size.height);
                             },
                             child: MarkdownTextContent(
+                              parentId: 'p${item.id}',
                               content: item.body['content'],
                               isSelectable: widget.isContentSelectable,
                             ).paddingOnly(left: 12, right: 8),