работающее сохранение

src/models/Document.zig

@@ -23,6 +23,23 @@ pub fn deinit(self: *Document, allocator: std.mem.Allocator) void {
     self.objects.deinit(allocator);
 }
 
+pub fn clone(self: *const Document, allocator: std.mem.Allocator) !Document {
+    var objects_list = std.ArrayList(Object).empty;
+    errdefer {
+        for (objects_list.items) |*obj| obj.deinit(allocator);
+        objects_list.deinit(allocator);
+    }
+    var next_id = self.next_object_id;
+    for (self.objects.items) |obj| {
+        try objects_list.append(allocator, try obj.clone(allocator, &next_id));
+    }
+    return .{
+        .size = self.size,
+        .objects = objects_list,
+        .next_object_id = next_id,
+    };
+}
+
 pub fn addObject(self: *Document, allocator: std.mem.Allocator, template: Object) !void {
     const obj = try template.clone(allocator, &self.next_object_id);
     try self.objects.append(allocator, obj);