Add filter that takes care of D* reshares with link preview having duplicate images

lib/controls/search_result_status_control.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:logging/logging.dart';
+import 'package:provider/provider.dart';
 
 import '../models/timeline_entry.dart';
+import '../services/auth_service.dart';
 import '../utils/clipboard_utils.dart';
 import '../utils/url_opening_utils.dart';
 import 'html_text_viewer_control.dart';
@@ -135,6 +137,17 @@ class _SearchResultStatusControlState extends State<SearchResultStatusControl> {
       return const SizedBox();
     }
 
+    // A Diaspora reshare will have an HTML-built card with a link preview image
+    // to the same image as what would be in the single attachment but at a
+    // different link. So we don't want it to render twice.
+    final linkPhotoBaseUrl = Uri.https(
+      context.read<AccountsService>().currentProfile.serverName,
+      'photo/link',
+    ).toString();
+    if (widget.status.body.contains(linkPhotoBaseUrl) && items.length == 1) {
+      return const SizedBox();
+    }
+
     return SizedBox(
         height: 250.0,
         child: ListView.separated(

lib/controls/timeline/flattened_tree_entry_control.dart

@@ -10,6 +10,7 @@ import '../../globals.dart';
 import '../../models/filters/timeline_entry_filter.dart';
 import '../../models/flattened_tree_item.dart';
 import '../../models/timeline_entry.dart';
+import '../../services/auth_service.dart';
 import '../../services/timeline_entry_filter_service.dart';
 import '../../services/timeline_manager.dart';
 import '../../utils/active_profile_selector.dart';
@@ -236,6 +237,17 @@ class _StatusControlState extends State<FlattenedTreeEntryControl> {
       return const SizedBox();
     }
 
+    // A Diaspora reshare will have an HTML-built card with a link preview image
+    // to the same image as what would be in the single attachment but at a
+    // different link. So we don't want it to render twice.
+    final linkPhotoBaseUrl = Uri.https(
+      context.read<AccountsService>().currentProfile.serverName,
+      'photo/link',
+    ).toString();
+    if (entry.body.contains(linkPhotoBaseUrl) && items.length == 1) {
+      return const SizedBox();
+    }
+
     return SizedBox(
         height: ResponsiveSizesCalculator(context).maxThumbnailHeight,
         child: ListView.separated(