server/helpers/image-utils.ts

   1 import 'multer'
   2 import * as sharp from 'sharp'
   3 import { readFile, remove } from 'fs-extra'
   4 import { logger } from './logger'
   5
   6 async function processImage (
   7   physicalFile: { path: string },
   8   destination: string,
   9   newSize: { width: number, height: number }
  10 ) {
  11   if (physicalFile.path === destination) {
  12     throw new Error('Sharp needs an input path different that the output path.')
  13   }
  14
  15   logger.debug('Processing image %s to %s.', physicalFile.path, destination)
  16
  17   // Avoid sharp cache
  18   const buf = await readFile(physicalFile.path)
  19   const sharpInstance = sharp(buf)
  20
  21   await remove(destination)
  22
  23   await sharpInstance
  24     .resize(newSize.width, newSize.height)
  25     .toFile(destination)
  26
  27   await remove(physicalFile.path)
  28 }
  29
  30 // ---------------------------------------------------------------------------
  31
  32 export {
  33   processImage
  34 }