Add file card

lib/helpers/extensions/size_to_string.dart

@@ -0,0 +1,22 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+
+extension SizeToString on int {
+  String get sizeAsString {
+    const IListConst<String> suffixes = IListConst([
+      "B",
+      "KB",
+      "MB",
+      "GB",
+      "TB",
+      "PB",
+    ]);
+
+    var i = 0;
+    var size = toDouble();
+    while (size > 1024 && i < suffixes.length - 1) {
+      size /= 1024;
+      i++;
+    }
+    return "${size.toStringAsFixed(2)} ${suffixes[i]}";
+  }
+}

lib/widgets/file_card.dart

@@ -0,0 +1,29 @@
+import "package:flutter/material.dart";
+import "package:nexus/helpers/extensions/size_to_string.dart";
+import "package:nexus/models/info/file.dart";
+
+class FileCard extends StatelessWidget {
+  final Uri uri;
+  final FileInfo? info;
+  final String? filename;
+  const FileCard(this.uri, this.info, {this.filename, super.key});
+
+  @override
+  Widget build(BuildContext context) => SizedBox(
+    width: 320,
+    child: Card(
+      color: Theme.of(context).colorScheme.surfaceContainer,
+      child: ListTile(
+        leading: Icon(Icons.file_copy),
+        title: Text(
+          filename ?? "file",
+          maxLines: 1,
+          overflow: TextOverflow.ellipsis,
+        ),
+        subtitle: info?.size == null ? null : Text(info!.size!.sizeAsString),
+        // TODO: Downloading files
+        trailing: IconButton(onPressed: null, icon: Icon(Icons.download)),
+      ),
+    ),
+  );
+}

lib/widgets/renderers/event.dart

@@ -26,6 +26,7 @@ import "package:nexus/widgets/loading.dart";
 import "package:nexus/widgets/players/video.dart";
 import "package:nexus/widgets/players/audio.dart";
 import "package:nexus/widgets/renderers/membership.dart";
+import "package:nexus/widgets/file_card.dart";
 import "package:timeago/timeago.dart";
 import "package:flutter_linkify/flutter_linkify.dart";
 
@@ -238,8 +239,15 @@ class EventRenderer extends ConsumerWidget {
                                                 :final info,
                                               ) =>
                                                 AudioPlayer(url, info),
-                                              // FileMessageContent(:final info) =>
-                                              //   FileRenderer(url, info),
+                                              FileMessageContent(
+                                                :final info,
+                                                :final filename,
+                                              ) =>
+                                                FileCard(
+                                                  url,
+                                                  info,
+                                                  filename: filename,
+                                                ),
                                               ImageMessageContent(:final info) => ExpandableImage(
                                                 url.toString(),
                                                 child: ClipRRect(