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import { createReadStream, createWriteStream, move, remove } from 'fs-extra'
import { join } from 'path'
import * as srt2vtt from 'srt-to-vtt'
import { MVideoCaption } from '@server/types/models'
import { CONFIG } from '../initializers/config'
import { pipelinePromise } from './core-utils'
import { Transform } from 'stream'
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
}
// ---------------------------------------------------------------------------
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)
}
})
return pipelinePromise(
createReadStream(source),
srt2vtt(),
fixVTT,
createWriteStream(destination)
)
}
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