aminul-remake-fca/src/editMessage.js

Aminul's remake of ws3-fca — next-generation Facebook Chat API fork

"use_strict";

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

module.exports = function(defaultFuncs, api, ctx) {
  return function editMessage(text, messageID, callback) {
    let reqID = ctx.wsReqNumber+1;
    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);
      };
    }

    var form = {
      message_id: messageID,
      text: text,
    };

    var content = {
      app_id: '2220391788200892',
      payload: JSON.stringify({
        data_trace_id: null,
        epoch_id: parseInt(utils.generateOfflineThreadingID()),
        tasks: [{
          failure_count: null,
          label: '742',
          payload: JSON.stringify(form),
          queue_name: 'edit_message',
          task_id: ++ctx.wsTaskNumber,
        }],
        version_id: '6903494529735864',
      }),
      request_id: ++ctx.wsReqNumber,
      type: 3
    }

    ctx.mqttClient.publish('/ls_req', JSON.stringify(content), {
      qos: 1, retain: false
    });
    const handleRes = function (topic, message) {
      if (topic === "/ls_resp") {
        let jsonMsg = JSON.parse(message.toString());
        jsonMsg.payload = JSON.parse(jsonMsg.payload);
        if (jsonMsg.request_id != reqID) return;
        ctx.mqttClient.removeListener('message', handleRes);

        let msgID = jsonMsg.payload.step[1][2][2][1][2];
        let msgReplace = jsonMsg.payload.step[1][2][2][1][4];
        
        if (msgReplace != text) {
          let err = {error: "The message is too old or not from you!"}
          // utils.error("editMessage", err);
          
          return callback(err, {
            body: msgReplace,
            messageID: msgID
          });
        }
        
        return callback(undefined, {
          body: msgReplace,
          messageID: msgID
        });
      }
    }
    ctx.mqttClient.on('message', handleRes);
    
    return returnPromise;
  };
}