Method fake

src/modules/helpers/index.ts:1350–1378

(pattern: string | ReadonlyArray<string>)

   */
  fake(pattern: string | ReadonlyArray<string>): string;
  fake(pattern: string | ReadonlyArray<string>): string {
    pattern =
      typeof pattern === 'string' ? pattern : this.arrayElement(pattern);

    // find first matching {{ and }}
    const start = pattern.search(/{{[a-z]/);
    const end = pattern.indexOf('}}', start);

    // if no {{ and }} is found, we are done
    if (start === -1 || end === -1) {
      return pattern;
    }

    // extract method name from between the {{ }} that we found
    // for example: {{person.firstName}}
    const token = pattern.substring(start + 2, end + 2);
    const method = token.replace('}}', '').replace('{{', '');

    const result = fakeEval(method, this.faker);
    const stringified = String(result);

    // Replace the found tag with the returned fake value
    // We cannot use string.replace here because the result might contain evaluated characters
    const patched =
      pattern.substring(0, start) + stringified + pattern.substring(end + 2);

    // return the response recursively until we are done finding all tags
    return this.fake(patched);
  }
}