Misago/frontend/src/services/zxcvbn.js

/* global zxcvbn */
export class Zxcvbn {
  init(include) {
    this._include = include;
    this._isLoaded = false;
  }

  scorePassword(password, inputs) {
    // 0-4 score, the more the stronger password
    if (this._isLoaded) {
      return zxcvbn(password, inputs).score;
    }

    return 0;
  }

  load() {
    if (!this._isLoaded) {
      this._include.include('misago/js/zxcvbn.js');
      return this._loadingPromise();
    } else {
      return this._loadedPromise();
    }
  }

  _loadingPromise() {
    const self = this;

    return new Promise(function(resolve, reject) {
      var wait = function(tries=0) {
        tries += 1;
        if (tries > 200) {
          reject();
        } else if (typeof zxcvbn === "undefined") {
          window.setTimeout(function() {
            wait(tries);
          }, 200);
        } else {
          self._isLoaded = true;
          resolve();
        }
      };
      wait();
    });
  }

  _loadedPromise() {
    // we have already loaded zxcvbn.js, resolve away!
    return new Promise(function(resolve) {
      resolve();
    });
  }
}

export default new Zxcvbn();