mary.my.id
personal web client for Bluesky
typescript
solidjs
bluesky
atcute
1import { $RAW } from 'solid-js/store';
2
3export const snapshot = <T>(value: T, map: WeakMap<any, any> = new WeakMap()): T => {
4 const v = value as any;
5
6 if (v == null || typeof v !== 'object') {
7 return v;
8 }
9
10 if (!v[$RAW]) {
11 return v;
12 }
13
14 const cached = map.get(v);
15 if (cached) {
16 return cached;
17 }
18
19 const proto = Object.getPrototypeOf(v);
20 switch (proto) {
21 case Array.prototype: {
22 const result: unknown[] = new Array(v.length);
23 for (let idx = 0, len = v.length; idx < len; idx++) {
24 result[idx] = snapshot(v[idx], map);
25 }
26
27 map.set(v, result);
28 return result as T;
29 }
30 case Object.prototype: {
31 const result: Record<PropertyKey, unknown> = {};
32 for (const key in v) {
33 result[key] = snapshot(v[key], map);
34 }
35
36 map.set(v, result);
37 return result as T;
38 }
39 }
40
41 return v;
42};