Update

lib/gallery.dart

@@ -0,0 +1,88 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+import 'package:go_router/go_router.dart';
+import 'package:logging/logging.dart';
+import 'api/gallery.dart';
+import 'globals.dart';
+
+final _log = Logger("GalleryPage");
+
+class GalleryPage extends StatefulWidget {
+  const GalleryPage(int gid, {Key? key})
+      : _gid = gid,
+        super(key: key);
+
+  final int _gid;
+  static const String routeName = '/gallery/:gid';
+
+  @override
+  State<GalleryPage> createState() => _GalleryPage();
+}
+
+class _GalleryPage extends State<GalleryPage> with ThemeModeWidget {
+  _GalleryPage();
+  int _gid = 0;
+  GalleryData? _data;
+  Object? _error;
+  bool _isLoading = false;
+
+  Future<void> _fetchData() async {
+    try {
+      _isLoading = true;
+      final data = (await api.getGallery(_gid)).unwrap();
+      setState(() {
+        _data = data;
+        _isLoading = false;
+      });
+    } catch (e) {
+      _log.severe("Failed to load gallery $_gid:", e);
+      setState(() {
+        _error = e;
+        _isLoading = false;
+      });
+    }
+  }
+
+  @override
+  void initState() {
+    _gid = widget._gid;
+    _data = null;
+    _error = null;
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    tryInitApi(context);
+    final isLoading = _data == null && _error == null;
+    if (isLoading && !_isLoading) _fetchData();
+    final title = isLoading
+        ? AppLocalizations.of(context)!.loading
+        : _data != null
+            ? _data!.meta.preferredTitle
+            : AppLocalizations.of(context)!.gallery;
+    return Scaffold(
+        appBar: AppBar(
+          leading: IconButton(
+            icon: const Icon(Icons.arrow_back),
+            onPressed: () {
+              context.canPop() ? context.pop() : context.go("/");
+            },
+          ),
+          title: _data != null ? SelectableText(title) : Text(title),
+          actions: [
+            buildThemeModeIcon(context),
+            buildMoreVertSettingsButon(context),
+          ],
+        ),
+        body: isLoading
+            ? const Center(child: CircularProgressIndicator())
+            : _data != null
+                ? Center(
+                    child: Text("Gallery $_gid"),
+                  )
+                : Center(
+                    child: Text("Error: $_error"),
+                  ));
+  }
+}