feat(Medias): use sharp and proper multer s3 setup to resize medias

src/MediaService.ts

@@ -1,7 +1,9 @@
 import Utils from './Utils'
 import aws from 'aws-sdk'
 import multer from 'multer'
-import multerS3 from 'multer-s3'
+// @ts-ignore
+import multerS3 from 'multer-s3-with-transforms'
+import sharp from 'sharp'
 
 export default class MediaService {
 
@@ -49,16 +51,36 @@ export default class MediaService {
         bucket: MediaService.getBucket(),
         acl: 'public-read',
         contentType: multerS3.AUTO_CONTENT_TYPE,
+        transforms: () => {
+          let transformOptions = {}
+          let quality = 80
+          if (type === 'media') {
+            transformOptions = { width: 953, withoutEnlargement: true, fit: 'cover' }
+          }
+          if (type === 'thumbnail') {
+            quality = 100
+            transformOptions = { width: 250, withoutEnlargement: true, fit: 'cover' }
+          }
+          if (type === 'cover') {
+            quality = 90
+            transformOptions = { height: 550, withoutEnlargement: true, fit: 'cover' }
+          }
+          console.log('transform called', transformOptions)
+          return sharp().resize(transformOptions).jpeg({
+            progressive: true,
+            quality,
+            force: false
+          })
+        },
         key: (_: any, file: any, cb: any) => {
-          console.log(file)
-          cb(null, Date.now().toString() + '_' + type)
+          // generate a random id for this image
+          let r = Math.random().toString(36).substring(4).toUpperCase()
+          console.log(r, file)
+          cb(null, r + '_' + type)
         }
       })
     })
-    if (multiple) {
-      return instance.array('file')
-    }
-    return instance.single('file')
+    return multiple ? instance.array('file') : instance.single('file')
   }
 
   static buildMedia(file: any, type: any) {