cyber-fca/src/changeAvt.js

A Facebook chat api for messenger bots.

"use strict";

var utils = require("../utils");
var log = require("npmlog");
/**
 * It posts an image to a Facebook profile
 * @param Api - The API object
 * @param BotID - The ID of the bot you want to post the image to.
 * @param form - The form data that you want to send.
 * @returns The JSON.parse(Data.split("for (;;);")[1]); is returning the following:
 * {"__ar":1,"payload":null,"jsmods":{"require":[["ImageUploader","uploadPhoto",[{"__m":"__elem_0"},{"__m":"__elem_1"},{"__m":"__elem_2"},{"__m":"__
 */
async function postImage(Api,BotID,form) {
    var Data = await Api.httpPostFormData(`https://www.facebook.com/profile/picture/upload/?profile_id=${BotID}&photo_source=57&av=${BotID}`, form);
    return JSON.parse(Data.split("for (;;);")[1]);
}

module.exports = function(defaultFuncs, api, ctx) {
/* Changing the profile picture of the bot. */
    return function changeAvt(link, caption, callback) {
        var resolveFunc = function() {};
        var rejectFunc = function() {};
        var returnPromise = new Promise(function(resolve, reject) {
            resolveFunc = resolve;
            rejectFunc = reject;
        });

        if (!callback) {
            callback = function(err, data) {
                if (err) return rejectFunc(err);
                resolveFunc(data);
            };
        }
        try {
            var Fetch = require('axios')
            Fetch.get(link, { responseType: "stream" }).then(data => { 
                postImage(api, ctx.userID, { file: data.data }).then(data => {
                    if (data.error) throw new Error({ error: data.error, des: data.error.errorDescription });
                    var form = {
                        av: ctx.userID,
                            fb_api_req_friendly_name: "ProfileCometProfilePictureSetMutation",
                            fb_api_caller_class: "RelayModern",
                            doc_id: "5066134240065849",
                            variables: JSON.stringify({
                                input: {
                                    caption: (caption || ""),
                                    existing_photo_id: data.payload.fbid,
                                    expiration_time: null,
                                    profile_id: ctx.userID,
                                    profile_pic_method: "EXISTING",
                                    profile_pic_source: "TIMELINE",
                                scaled_crop_rect: {
                                    height: 1,
                                    width: 1,
                                    x: 0,
                                    y: 0
                                },
                                skip_cropping: true,
                                actor_id: ctx.userID,
                                client_mutation_id: Math.round(Math.random() * 19).toString()
                                },
                            isPage: false,
                            isProfile: true,
                            scale: 3,
                        })
                    };
                    defaultFuncs
                        .post("https://www.facebook.com/api/graphql/", ctx.jar, form)
                        .then(utils.parseAndCheckLogin(ctx, defaultFuncs))
                        .then(function(resData) {
                            if (resData.error) throw resData;
                            else return callback(null,true)
                        })
                        .catch(function(err) {
                        return callback(err);
                    });
                })
            })  
        }
        catch (e) {
            throw e;
        }
        return returnPromise;
    };
};