Adding download tab and download manager, ffmpeg in worker thread

server/utils/downloadWorker.js

@@ -0,0 +1,68 @@
+const Ffmpeg = require('fluent-ffmpeg')
+
+if (process.env.NODE_ENV !== 'production') {
+  Ffmpeg.setFfmpegPath(process.env.FFMPEG_PATH)
+}
+
+const { parentPort, workerData } = require("worker_threads")
+const Logger = require('../Logger')
+
+Logger.info('[DownloadWorker] Starting Worker...')
+
+
+const ffmpegCommand = Ffmpeg()
+const startTime = Date.now()
+
+ffmpegCommand.input(workerData.input)
+if (workerData.inputFormat) ffmpegCommand.inputFormat(workerData.inputFormat)
+if (workerData.inputOption) ffmpegCommand.inputOption(workerData.inputOption)
+if (workerData.options) ffmpegCommand.addOption(workerData.options)
+ffmpegCommand.output(workerData.output)
+
+var isKilled = false
+
+async function runFfmpeg() {
+  var success = await new Promise((resolve) => {
+    ffmpegCommand.on('start', (command) => {
+      Logger.info('[DownloadWorker] FFMPEG concat started with command: ' + command)
+    })
+
+    ffmpegCommand.on('stderr', (stdErrline) => {
+      Logger.info(stdErrline)
+    })
+
+    ffmpegCommand.on('error', (err, stdout, stderr) => {
+      if (err.message && err.message.includes('SIGKILL')) {
+        // This is an intentional SIGKILL
+        Logger.info('[DownloadWorker] User Killed singleAudio')
+      } else {
+        Logger.error('[DownloadWorker] Ffmpeg Err', err.message)
+      }
+      resolve(false)
+    })
+
+    ffmpegCommand.on('end', (stdout, stderr) => {
+      Logger.info('[DownloadWorker] singleAudio ended')
+      resolve(true)
+    })
+    ffmpegCommand.run()
+  })
+
+  var resultMessage = {
+    type: 'RESULT',
+    isKilled,
+    elapsed: Date.now() - startTime,
+    success
+  }
+  parentPort.postMessage(resultMessage)
+}
+
+parentPort.on('message', (message) => {
+  if (message === 'STOP') {
+    Logger.info('[DownloadWorker] Requested a hard stop')
+    isKilled = true
+    ffmpegCommand.kill()
+  }
+})
+
+runFfmpeg()