Initial Flutter booru app

lib/backend/models/collection.dart

@@ -0,0 +1,34 @@
+class Collection {
+  const Collection({
+    required this.id,
+    required this.name,
+    this.description,
+    this.coverUrl,
+    required this.createdAt,
+    required this.updatedAt,
+  });
+
+  final String id;
+  final String name;
+  final String? description;
+  final String? coverUrl;
+  final DateTime createdAt;
+  final DateTime updatedAt;
+
+  Collection copyWith({
+    String? id,
+    String? name,
+    String? description,
+    String? coverUrl,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+  }) =>
+      Collection(
+        id: id ?? this.id,
+        name: name ?? this.name,
+        description: description ?? this.description,
+        coverUrl: coverUrl ?? this.coverUrl,
+        createdAt: createdAt ?? this.createdAt,
+        updatedAt: updatedAt ?? this.updatedAt,
+      );
+}