pm2 / cron worker to send reminder

app/storage.js

@@ -0,0 +1,56 @@
+const fs = require('fs')
+const os = require('os')
+const path = require('path')
+const crypto = require('crypto')
+const mkdirp = require('mkdirp')
+const sharp = require('sharp')
+
+function getDestination (req, file, cb) {
+  cb(null, os.tmpdir())
+}
+
+function DiskStorage (opts) {
+  if (typeof opts.destination === 'string') {
+    mkdirp.sync(opts.destination)
+    this.getDestination = function ($0, $1, cb) { cb(null, opts.destination) }
+  } else {
+    this.getDestination = (opts.destination || getDestination)
+  }
+}
+
+DiskStorage.prototype._handleFile = function _handleFile (req, file, cb) {
+  var that = this
+  that.getDestination(req, file, function (err, destination) {
+    if (err) return cb(err)
+
+    const filename = crypto.randomBytes(16).toString('hex') + '.webp'
+    const finalPath = path.join(destination, filename)
+    const outStream = fs.createWriteStream(finalPath)
+    const resizer = sharp().resize(800).webp()
+
+    file.stream.pipe(resizer).pipe(outStream)
+    outStream.on('error', cb)
+    outStream.on('finish', function () {
+      cb(null, {
+        destination,
+        filename,
+        path: finalPath,
+        size: outStream.bytesWritten
+      })
+    })
+  })
+}
+
+DiskStorage.prototype._removeFile = function _removeFile (req, file, cb) {
+  var path = file.path
+
+  delete file.destination
+  delete file.filename
+  delete file.path
+
+  fs.unlink(path, cb)
+}
+
+module.exports = function (opts) {
+  return new DiskStorage(opts)
+}