server/server -> server/core

server/core/helpers/captions-utils.ts

@@ -0,0 +1,55 @@
+import { createReadStream, createWriteStream } from 'fs'
+import { move, remove } from 'fs-extra/esm'
+import { join } from 'path'
+import { Transform } from 'stream'
+import { MVideoCaption } from '@server/types/models/index.js'
+import { CONFIG } from '../initializers/config.js'
+import { pipelinePromise } from './core-utils.js'
+
+async function moveAndProcessCaptionFile (physicalFile: { filename: string, path: string }, videoCaption: MVideoCaption) {
+  const videoCaptionsDir = CONFIG.STORAGE.CAPTIONS_DIR
+  const destination = join(videoCaptionsDir, videoCaption.filename)
+
+  // Convert this srt file to vtt
+  if (physicalFile.path.endsWith('.srt')) {
+    await convertSrtToVtt(physicalFile.path, destination)
+    await remove(physicalFile.path)
+  } else if (physicalFile.path !== destination) { // Just move the vtt file
+    await move(physicalFile.path, destination, { overwrite: true })
+  }
+
+  // This is important in case if there is another attempt in the retry process
+  physicalFile.filename = videoCaption.filename
+  physicalFile.path = destination
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  moveAndProcessCaptionFile
+}
+
+// ---------------------------------------------------------------------------
+
+async function convertSrtToVtt (source: string, destination: string) {
+  const fixVTT = new Transform({
+    transform: (chunk, _encoding, cb) => {
+      let block: string = chunk.toString()
+
+      block = block.replace(/(\d\d:\d\d:\d\d)(\s)/g, '$1.000$2')
+                   .replace(/(\d\d:\d\d:\d\d),(\d)(\s)/g, '$1.00$2$3')
+                   .replace(/(\d\d:\d\d:\d\d),(\d\d)(\s)/g, '$1.0$2$3')
+
+      return cb(undefined, block)
+    }
+  })
+
+  const srt2vtt = await import('srt-to-vtt')
+
+  return pipelinePromise(
+    createReadStream(source),
+    srt2vtt.default(),
+    fixVTT,
+    createWriteStream(destination)
+  )
+}