src/modules/identity-crossapp.js

/**
 * Identity SDK cross app helpers
 */
class IdentityCrossApp {
  /**
   * Set a list of available cookie names
   * @param {Class} nativeController
   */
  constructor(nativeController) {
    Object.assign(this, {
      _callbacks: {},
      _nativeController: nativeController,
    });

    this._commandList = {
      get: 'GetStoredCredentials',
      remove: 'RemoveStoredCredentials',
      set: 'StoreCredentials',
    };

    // Bind this to callback
    this._onBridgeMessage = this._onBridgeMessage.bind(this);
  }

  /**
   * Subscribe to native bridge messages
   * @param {string} subject
   * @param {Object} message
   */
  _onBridgeMessage(subject, message) {
    // Receive message from native bridge
    switch (subject) {
      case this._commandList.get:
        if (this._callbacks.get && this._callbacks.get.length > 0) {
          this._callbacks.get.forEach((callback) => callback(message));
        }
        break;
      case this._commandList.remove:
        if (this._callbacks.remove && this._callbacks.remove.length > 0) {
          this._callbacks.remove.forEach((callback) => callback(message));
        }
        break;
      case this._commandList.set:
        if (this._callbacks.set && this._callbacks.set.length > 0) {
          this._callbacks.set.forEach((callback) => callback(message));
        }
        break;
    }
  }

  /**
   * Initialize the cross app bridge
   * @return {Promise}
   */
  init() {
    return new Promise((resolve, reject) => {
      this._nativeController.init().then(() => {
        // Subscribe to the bridge
        this._nativeController.subscribe(this._onBridgeMessage);
        return resolve();
      }).catch(() => reject());
    });
  }

  /**
   * Send command through the cross app bridge
   * @param {string} name - command name
   * @param {Object} payload - keychain options
   * @return {Error}
   */
  command(name, payload) {
    const command = this._commandList[name];
    if (!command) return Error('Command name does not exist.');
    this._nativeController.sendCommand(command, payload);
  }

  /**
   * Set callbacks
   * @param {string} name
   * @param {function} callback
   * @return {Error}
   */
  on(name, callback) {
    const command = this._commandList[name];
    if (!command) return Error('Command name does not exist.');
    if (!this._callbacks[name]) this._callbacks[name] = [];
    this._callbacks[name].push(callback);
  }

  /**
   * Remove all cross app user data from the iOS keychain
   * @param {string} token - IDM session token
   */
  remove(token) {
    this.command('remove', {});
  }
}

export default IdentityCrossApp;