sadgod/source/extractSWF.js

SadGod helps you extract data from ROTMG's internal SWF files. Currently it allows you to read the names and values of all binary packet ids used in the network communication. This is helpful because the game often changes the packet ids.

const {join} = require('path')
const {exists} = require('fs-extra')
const {promisify} = require('util')
const SWFData = require('./SWFData')
const exec = promisify(require('child_process').exec)
const mkdirp = require('mkdirp-promise')
const jpexs = require( 'jpexs-flash-decompiler' )
const isFolderEmpty = require('./isFolderEmpty')

//const ffdecLibPath = join(__dirname, '..', 'ffdec_lib.jar')
const extractionFolder = join(__dirname, '..', 'extracted')
const cacheFolder = join(__dirname, '..', 'cache')

async function extractSWF(swfData) {
  await mkdirp(cacheFolder)
  if (!(swfData instanceof SWFData)) throw new Error("Expected SWF Data")
  if (!(await exists(swfData.downloadPath))) throw new Error("This swf has not been downloaded.")
  await mkdirp(swfData.extractionFolder)
  if (!(await isFolderEmpty(swfData.extractionFolder))) return // console.warn("It appears the library has already been extracted")
  await new Promise((resolve, reject) => {
    console.log("Extracting the SWF scripts, this can take a long time!")
    jpexs.export( {
      file: swfData.downloadPath,
      output: swfData.extractionFolder,
      items: [ jpexs.ITEM.SCRIPT ]
    }, err => {
      if ( err ) return reject(err)
      resolve()
    } )
  })
}

module.exports = extractSWF