accounts-frontend/packages/app/components/ui/bsod/BsodMiddleware.ts

import { InternalServerError } from 'app/services/request';
import { Resp, Middleware } from 'app/services/request';
import defaultLogger from 'app/services/logger';

type Logger = typeof defaultLogger;

const ABORT_ERR = 20;

class BsodMiddleware implements Middleware {
    dispatchBsod: () => any;
    logger: Logger;

    constructor(dispatchBsod: () => any, logger: Logger = defaultLogger) {
        this.dispatchBsod = dispatchBsod;
        this.logger = logger;
    }

    async catch<T extends Resp<any>>(resp?: T | InternalServerError | Error): Promise<T> {
        const { originalResponse } = (resp || {}) as InternalServerError;

        if (
            resp &&
            ((resp instanceof InternalServerError && (resp.error as any).code !== ABORT_ERR) ||
                (originalResponse && /5\d\d/.test(originalResponse.status)))
        ) {
            this.dispatchBsod();

            const { message: errorMessage } = resp as { [key: string]: any };

            if (!errorMessage || !/NetworkError/.test(errorMessage)) {
                let message = 'Unexpected response (BSoD)';

                if (errorMessage) {
                    message = `BSoD: ${errorMessage}`;
                }

                this.logger.warn(message, { resp });
            }
        }

        return Promise.reject(resp);
    }
}

export default BsodMiddleware;