Mizah/Sharkey
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Improve type

Browse source
This commit is contained in:
syuilo 2021-05-31 23:00:48 +09:00
parent b2549d98f9
commit a1f2dd7846
2 changed files with 24 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

17
src/api.ts
View file

@ -24,6 +24,10 @@ export type FetchLike = (input: string, init?: {
json(): Promise<any>;
}>;
type IsNeverType<T> = [T] extends [never] ? true : false;
type StrictExtract<Union, Cond> = Cond extends Union ? Union : never;
export class APIClient {
public origin: string;
public credential: string | null | undefined;
@ -39,14 +43,19 @@ export class APIClient {
this.fetch = opts.fetch || fetch;
}
public request<E extends keyof Endpoints>(
endpoint: E, data: Endpoints[E]['req'] = {}, credential?: string | null | undefined,
): Promise<Endpoints[E]['res']> {
public request<E extends keyof Endpoints, P extends Endpoints[E]['req']>(
endpoint: E, params: P, credential?: string | null | undefined,
): Promise<Endpoints[E]['res'] extends { $switch: { $cases: [any, any][]; $default: any; }; }
? IsNeverType<StrictExtract<Endpoints[E]['res']['$switch']['$cases'][number], [P, any]>> extends true
? Endpoints[E]['res']['$switch']['$default']
: StrictExtract<Endpoints[E]['res']['$switch']['$cases'][number], [P, any]>[1]
: Endpoints[E]['res']>
{
const promise = new Promise<Endpoints[E]['res']>((resolve, reject) => {
this.fetch(`${this.origin}/api/${endpoint}`, {
method: 'POST',
body: JSON.stringify({
...data,
...params,
i: credential !== undefined ? credential : this.credential
}),
credentials: 'omit',