import { base64ToAscii } from '../../parsing/binary';

export class FirmwareClerk {
  resolve: Function;
  reject: Function;
  stringBuffer: string;

  constructor(resolve, reject) {
    this.resolve = resolve;
    this.reject = reject;
    this.stringBuffer = '';
  }

  appendString(aString) {
    this.stringBuffer += base64ToAscii(aString);

    try {
      const result = JSON.parse(this.stringBuffer);

      if (!result.Version) {
        throw Error('Version not found in probe info');
      }

      this.resolve(result.Version);
    } catch (err) {
      if (err instanceof SyntaxError) {
        // If it's a JSON parsing error, do nothing and wait for more bytes
      } else {
        console.error(err);
        this.reject('Se produjo un error al recuperar el firmware');
      }
    }
  }
}