mpackdb

1.0 KB

1. export function isObject(item) {
2. return (item && item !== null && typeof item === 'object' && !Array.isArray(item));
3. }
5. // with recursion detection
6. export function assignDeep(target, ...sources) {
7. const seen = new WeakSet(); // Use WeakSet to store processed objects
9. const mergeInternal = (target, source) => {
10. if (!isObject(target) || !isObject(source)) {
11. return;
12. }
14. // Check if the object has been processed before
15. if (seen.has(source)) {
16. return;
17. }
19. seen.add(source); // Mark the object as processed
21. for (const key in source) {
22. if (isObject(source[key]) && target[key]) {
23. mergeInternal(target[key], source[key]);
24. } else {
25. try {
26. target[key] = source[key];
27. } catch (e) {
28. // Handle the case where a non-writable property is tried to be set
29. }
30. }
31. }
32. };
34. for (const source of sources) {
35. mergeInternal(target, source);
36. }
38. return target;
39. }
41. export class Model {
42. constructor(data = {}, merge = true) {
43. if (merge) {
44. assignDeep(this, data);
45. } else {
46. Object.assign(this, data);
47. }
48. }
49. }