lots of stuff

lib/widgets/avatar_or_hash.dart

@@ -0,0 +1,38 @@
+import "package:color_hash/color_hash.dart";
+import "package:flutter/widgets.dart";
+
+class AvatarOrHash extends StatelessWidget {
+  final Uri? avatar;
+  final String title;
+  final Widget? fallback;
+  final Map<String, String> headers;
+  const AvatarOrHash(
+    this.avatar,
+    this.title, {
+    this.fallback,
+    required this.headers,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final box = ColoredBox(
+      color: ColorHash(title).color,
+      child: Center(child: Text(title[0])),
+    );
+    return ClipRRect(
+      borderRadius: BorderRadius.all(Radius.circular(4)),
+      child: SizedBox(
+        width: 24,
+        height: 24,
+        child: avatar == null
+            ? fallback ?? box
+            : Image.network(
+                avatar.toString(),
+                headers: headers,
+                errorBuilder: (_, _, _) => box,
+              ),
+      ),
+    );
+  }
+}