cyber-fca/src/refreshFb_dtsg.js

A Facebook chat api for messenger bots.

"use strict";

const utils = require("../utils");
// @NethWs3Dev

module.exports = function (defaultFuncs, api, ctx) {
 /**
   * Refreshes the fb_dtsg and jazoest values.
   * @param {Function} callback
   * @returns {Promise}
   * @description if you don't update the value of fb_dtsg and jazoest for a long time an error "Please try closing and re-opening your browser window" will appear
   * @description you should refresh it every 48h or less
   */
  return function refreshFb_dtsg(obj, callback) {
    let resolveFunc = function () {};
    let rejectFunc = function () {};
    const returnPromise = new Promise(function (resolve, reject) {
      resolveFunc = resolve;
      rejectFunc = reject;
    });

    if (
      utils.getType(obj) === "Function" ||
      utils.getType(obj) === "AsyncFunction"
    ) {
      callback = obj;
      obj = {};
    }

    if (!obj) {
      obj = {};
    }

    if (utils.getType(obj) !== "Object") {
      throw new utils.CustomError(
        "the first parameter must be an object or a callback function",
      );
    }

    if (!callback) {
      callback = function (err, friendList) {
        if (err) {
          return rejectFunc(err);
        }
        resolveFunc(friendList);
      };
    }

    if (Object.keys(obj).length == 0) {
      utils
        .get("https://m.facebook.com/", ctx.jar, null, ctx.globalOptions, {
          noRef: true,
        })
        .then(function (resData) {
          const html = resData.body;
          const fb_dtsg = utils.getFrom(html, 'name="fb_dtsg" value="', '"');
          const jazoest = utils.getFrom(html, 'name="jazoest" value="', '"');
          if (!fb_dtsg) {
            throw new utils.CustomError(
              "Could not find fb_dtsg in HTML after requesting https://www.facebook.com/",
            );
          }
          ctx.fb_dtsg = fb_dtsg;
          ctx.jazoest = jazoest;
          callback(null, {
            data: {
              fb_dtsg: fb_dtsg,
              jazoest: jazoest,
            },
            message: "refreshed fb_dtsg and jazoest",
          });
        })
        .catch(function (err) {
          console.error("refreshFb_dtsg", err);
          return callback(err);
        });
    } else {
      Object.keys(obj).forEach(function (key) {
        ctx[key] = obj[key];
      });
      callback(null, {
        data: obj,
        message: "refreshed " + Object.keys(obj).join(", "),
      });
    }

    return returnPromise;
  };
};