unofficial-fb-chat-api/src/addUserToGroup.js

A Facebook chat API that doesn't rely on XMPP

"use strict";

var utils = require("../utils");
var log = require("npmlog");

module.exports = function(defaultFuncs, api, ctx) {
  return function addUserToGroup(userID, threadID, callback) {
    var resolveFunc = function(){};
    var rejectFunc = function(){};
    var returnPromise = new Promise(function (resolve, reject) {
      resolveFunc = resolve;
      rejectFunc = reject;
    });

    if (
      !callback &&
      (utils.getType(threadID) === "Function" ||
        utils.getType(threadID) === "AsyncFunction")
    ) {
      throw { error: "please pass a threadID as a second argument." };
    }

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

    if (
      utils.getType(threadID) !== "Number" &&
      utils.getType(threadID) !== "String"
    ) {
      throw {
        error:
          "ThreadID should be of type Number or String and not " +
          utils.getType(threadID) +
          "."
      };
    }

    if (utils.getType(userID) !== "Array") {
      userID = [userID];
    }

    var messageAndOTID = utils.generateOfflineThreadingID();
    var form = {
      client: "mercury",
      action_type: "ma-type:log-message",
      author: "fbid:" + ctx.userID,
      thread_id: "",
      timestamp: Date.now(),
      timestamp_absolute: "Today",
      timestamp_relative: utils.generateTimestampRelative(),
      timestamp_time_passed: "0",
      is_unread: false,
      is_cleared: false,
      is_forward: false,
      is_filtered_content: false,
      is_filtered_content_bh: false,
      is_filtered_content_account: false,
      is_spoof_warning: false,
      source: "source:chat:web",
      "source_tags[0]": "source:chat",
      log_message_type: "log:subscribe",
      status: "0",
      offline_threading_id: messageAndOTID,
      message_id: messageAndOTID,
      threading_id: utils.generateThreadingID(ctx.clientID),
      manual_retry_cnt: "0",
      thread_fbid: threadID
    };

    for (var i = 0; i < userID.length; i++) {
      if (
        utils.getType(userID[i]) !== "Number" &&
        utils.getType(userID[i]) !== "String"
      ) {
        throw {
          error:
            "Elements of userID should be of type Number or String and not " +
            utils.getType(userID[i]) +
            "."
        };
      }

      form["log_message_data[added_participants][" + i + "]"] =
        "fbid:" + userID[i];
    }

    defaultFuncs
      .post("https://www.facebook.com/messaging/send/", ctx.jar, form)
      .then(utils.parseAndCheckLogin(ctx, defaultFuncs))
      .then(function(resData) {
        if (!resData) {
          throw { error: "Add to group failed." };
        }
        if (resData.error) {
          throw resData;
        }

        return callback();
      })
      .catch(function(err) {
        log.error("addUserToGroup", err);
        return callback(err);
      });
      
    return returnPromise;
  };
};