server/helpers/image-utils.ts

   1 import { remove, rename } from 'fs-extra'
   2 import { extname } from 'path'
   3 import { convertWebPToJPG, processGIF } from './ffmpeg-utils'
   4 import { logger } from './logger'
   5
   6 const Jimp = require('jimp')
   7
   8 async function processImage (
   9   path: string,
  10   destination: string,
  11   newSize: { width: number, height: number },
  12   keepOriginal = false
  13 ) {
  14   const extension = extname(path)
  15
  16   if (path === destination) {
  17     throw new Error('Jimp/FFmpeg needs an input path different that the output path.')
  18   }
  19
  20   logger.debug('Processing image %s to %s.', path, destination)
  21
  22   // Use FFmpeg to process GIF
  23   if (extension === '.gif') {
  24     await processGIF(path, destination, newSize)
  25   } else {
  26     await jimpProcessor(path, destination, newSize)
  27   }
  28
  29   if (keepOriginal !== true) await remove(path)
  30 }
  31
  32 // ---------------------------------------------------------------------------
  33
  34 export {
  35   processImage
  36 }
  37
  38 // ---------------------------------------------------------------------------
  39
  40 async function jimpProcessor (path: string, destination: string, newSize: { width: number, height: number }) {
  41   let jimpInstance: any
  42
  43   try {
  44     jimpInstance = await Jimp.read(path)
  45   } catch (err) {
  46     logger.debug('Cannot read %s with jimp. Try to convert the image using ffmpeg first.', path, { err })
  47
  48     const newName = path + '.jpg'
  49     await convertWebPToJPG(path, newName)
  50     await rename(newName, path)
  51
  52     jimpInstance = await Jimp.read(path)
  53   }
  54
  55   await remove(destination)
  56
  57   await jimpInstance
  58     .resize(newSize.width, newSize.height)
  59     .quality(80)
  60     .writeAsync(destination)
  61 }