-import 'multer'
-import * as sharp from 'sharp'
-import { readFile, remove } from 'fs-extra'
+import { copy, readFile, remove, rename } from 'fs-extra'
+import * as Jimp from 'jimp'
+import { v4 as uuidv4 } from 'uuid'
+import { getLowercaseExtension } from './core-utils'
+import { convertWebPToJPG, processGIF } from './ffmpeg-utils'
import { logger } from './logger'
+function generateImageFilename (extension = '.jpg') {
+ return uuidv4() + extension
+}
+
async function processImage (
- physicalFile: { path: string },
+ path: string,
destination: string,
- newSize: { width: number, height: number }
+ newSize: { width: number, height: number },
+ keepOriginal = false
) {
- if (physicalFile.path === destination) {
- throw new Error('Sharp needs an input path different that the output path.')
- }
+ const extension = getLowercaseExtension(path)
- logger.debug('Processing image %s to %s.', physicalFile.path, destination)
-
- // Avoid sharp cache
- const buf = await readFile(physicalFile.path)
- const sharpInstance = sharp(buf)
+ if (path === destination) {
+ throw new Error('Jimp/FFmpeg needs an input path different that the output path.')
+ }
- await remove(destination)
+ logger.debug('Processing image %s to %s.', path, destination)
- await sharpInstance
- .resize(newSize.width, newSize.height)
- .toFile(destination)
+ // Use FFmpeg to process GIF
+ if (extension === '.gif') {
+ await processGIF(path, destination, newSize)
+ } else {
+ await jimpProcessor(path, destination, newSize, extension)
+ }
- await remove(physicalFile.path)
+ if (keepOriginal !== true) await remove(path)
}
// ---------------------------------------------------------------------------
export {
+ generateImageFilename,
processImage
}
+
+// ---------------------------------------------------------------------------
+
+async function jimpProcessor (path: string, destination: string, newSize: { width: number, height: number }, inputExt: string) {
+ let jimpInstance: Jimp
+ const inputBuffer = await readFile(path)
+
+ try {
+ jimpInstance = await Jimp.read(inputBuffer)
+ } catch (err) {
+ logger.debug('Cannot read %s with jimp. Try to convert the image using ffmpeg first.', path, { err })
+
+ const newName = path + '.jpg'
+ await convertWebPToJPG(path, newName)
+ await rename(newName, path)
+
+ jimpInstance = await Jimp.read(path)
+ }
+
+ await remove(destination)
+
+ // Optimization if the source file has the appropriate size
+ const outputExt = getLowercaseExtension(destination)
+ if (skipProcessing({ jimpInstance, newSize, imageBytes: inputBuffer.byteLength, inputExt, outputExt })) {
+ return copy(path, destination)
+ }
+
+ await jimpInstance
+ .resize(newSize.width, newSize.height)
+ .quality(80)
+ .writeAsync(destination)
+}
+
+function skipProcessing (options: {
+ jimpInstance: Jimp
+ newSize: { width: number, height: number }
+ imageBytes: number
+ inputExt: string
+ outputExt: string
+}) {
+ const { jimpInstance, newSize, imageBytes, inputExt, outputExt } = options
+ const { width, height } = newSize
+
+ if (jimpInstance.getWidth() > width || jimpInstance.getHeight() > height) return false
+ if (inputExt !== outputExt) return false
+
+ const kB = 1000
+
+ if (height >= 1000) return imageBytes <= 200 * kB
+ if (height >= 500) return imageBytes <= 100 * kB
+
+ return imageBytes <= 15 * kB
+}