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made a start on the logic for saving files

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Chris Kruining 2024-10-21 16:25:57 +02:00
parent 6064fd3b45
commit a6fc5720d4
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GPG key ID: EB894A3560CCCAD2
5 changed files with 121 additions and 21 deletions
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23
src/utilities.ts
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@ -41,10 +41,15 @@ export const deepCopy = <T>(original: T): T => {
) as T;
}
type Added = { kind: 'added', value: any };
type Updated = { kind: 'updated', value: any, original: any };
type Removed = { kind: 'removed' };
export type Mutation = { key: string } & (Added | Updated | Removed);
export enum MutarionKind {
Create = 'created',
Update = 'updated',
Delete = 'deleted',
}
type Created = { kind: MutarionKind.Create, value: any };
type Updated = { kind: MutarionKind.Update, value: any, original: any };
type Deleted = { kind: MutarionKind.Delete };
export type Mutation = { key: string } & (Created | Updated | Deleted);
export function* deepDiff<T1 extends object, T2 extends object>(a: T1, b: T2, path: string[] = []): Generator<Mutation, void, unknown> {
if (!isIterable(a) || !isIterable(b)) {
@ -59,14 +64,14 @@ export function* deepDiff<T1 extends object, T2 extends object>(a: T1, b: T2, pa
}
if (!keyA && keyB) {
yield { key: path.concat(keyB.toString()).join('.'), kind: 'added', value: valueB };
yield { key: path.concat(keyB.toString()).join('.'), kind: MutarionKind.Create, value: valueB };
continue;
}
if (keyA && !keyB) {
// value was added
yield { key: path.concat(keyA.toString()).join('.'), kind: 'removed' };
yield { key: path.concat(keyA.toString()).join('.'), kind: MutarionKind.Delete };
continue;
}
@ -84,10 +89,10 @@ export function* deepDiff<T1 extends object, T2 extends object>(a: T1, b: T2, pa
const key = path.concat(keyA!.toString()).join('.');
yield ((): Mutation => {
if (valueA === null || valueA === undefined) return { key, kind: 'added', value: valueB };
if (valueB === null || valueB === undefined) return { key, kind: 'removed' };
if (valueA === null || valueA === undefined) return { key, kind: MutarionKind.Create, value: valueB };
if (valueB === null || valueB === undefined) return { key, kind: MutarionKind.Delete };
return { key, kind: 'updated', value: valueB, original: valueA };
return { key, kind: MutarionKind.Update, value: valueB, original: valueA };
})();
}
};