ResponseHandler.ts

ResponseHandler.ts

export class ResponseHandler {
    private promise: Promise<Response>;

    private constructor(promise: Promise<Response>) {
        this.promise = promise;
    };

    public receive(status: number, handler: (response: Response) => void) {
        const next = this.promise.then((response: Response) => {
            if (status === response.status) {
                handler(response);
            }
            return response;
        });
        return new ResponseHandler(next);
    };

    public failure(handler: (reason: unknown) => void) {
        const next = this.promise.catch((reason) => {
            handler(reason);
            return this.promise;
        });
        return new ResponseHandler(next);
    }

    public bottom(handler: () => void) {
        const next = this.promise.finally(handler);
        return new ResponseHandler(next);
    }

    public static call(input: URL | RequestInfo, init?: RequestInit) {
        return new ResponseHandler(fetch(input, init));
    }
};