asksuite-core/util/DialogContext.js

function isChangeLanguageFacebook(postback) {
  try {
    const data = JSON.parse(JSON.parse(postback.payload.split('=')[1]).data);
    return Object.keys(data).length === 1 && data.language != null;
  } catch (e) {
    return false;
  }
}

module.exports = {
  get: item => {
    if (!item) {
      return {};
    }

    return {
      dialog: item.defaultDialog || item.dialog,
      events: item.events,
    };
  },
  getFromType: message => {
    const BUTTON_TAG = 'botaction?';

    if (message) {
      if (message.type === 'open_chat' || message.fromType === 'open_chat') {
        return 'open_chat';
      } else if (
        message.event &&
        message.event.action &&
        message.event.action.includes(BUTTON_TAG)
      ) {
        // Button MsBot
        return 'button';
      } else if (message.quick_reply) {
        // Button Facebook
        return 'button';
      } else if (message.type === 'button' || message.fromType === 'button') {
        // Button Whatsapp
        return 'button';
      } else if (message.type === 'form' || message.fromType === 'form') {
        return 'form';
      } else if (message.postback && process.env.PLATFORM === 'facebook') {
        if (isChangeLanguageFacebook(message.postback)) {
          // Change Language Facebook
          return 'change_language';
        }

        return 'button';
      }
    }

    return 'text';
  },
};