28
*/
29
export function recordChanges<TObs extends Record<any, IObservableWithChange<any, any>>>(obs: TObs):
31
>
& { changes: readonly ({ [TKey in keyof TObs]: { key: TKey; change: TObs[TKey]['TChange'] } }[keyof TObs])[] }> {
32
>
return {
33
>
createChangeSummary: (_previousChangeSummary) => {
34
>
// eslint-disable-next-line local/code-no-any-casts
35
>
return {
36
>
changes: [],
37
>
} as any;
38
>
},
39
>
handleChange(ctx, changeSummary) {
40
>
for (const key in obs) {
41
>
if (ctx.didChange(obs[key])) {
42
>
// eslint-disable-next-line local/code-no-any-casts
43
>
(changeSummary.changes as any).push({ key, change: ctx.change });
44
>
}
45
>
}
46
>
return true;
47
>
},
48
>
beforeUpdate(reader, changeSummary) {
49
>
for (const key in obs) {
50
>
if (key === 'changes') {
51
throw new BugIndicatingError('property name "changes" is reserved for change tracking');
52
}
54
>
}
55
>
}
56
>
};
57
>
}
58
59
/**