added new file for snyk code scan

routes/.dccache

@@ -0,0 +1 @@
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routes/delikeProductReviews.js

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2014-2021 Bjoern Kimminich.
+ * SPDX-License-Identifier: MIT
+ */
+
+const utils = require('../lib/utils')
+const challenges = require('../data/datacache').challenges
+const db = require('../data/mongodb')
+const insecurity = require('../lib/insecurity')
+
+module.exports = function productReviews () {
+  return (req, res, next) => {
+    const id = req.body.id
+    const user = insecurity.authenticatedUsers.from(req)
+    db.reviews.findOne({ _id: id }).then(review => {
+      var likedBy = review.likedBy
+      if (!likedBy.includes(user.data.email)) {
+        db.reviews.update(
+          { _id: id },
+          { $inc: { likesCount: 1 } }
+        ).then(
+          result => {
+            // Artificial wait for timing attack challenge
+            setTimeout(function () {
+              db.reviews.findOne({ _id: id }).then(review => {
+                var likedBy = review.likedBy
+                likedBy.push(user.data.email)
+                var count = 0
+                for (var i = 0; i < likedBy.length; i++) {
+                  if (likedBy[i] === user.data.email) {
+                    count++
+                  }
+                }
+                utils.solveIf(challenges.timingAttackChallenge, () => { return count > 2 })
+                db.reviews.update(
+                  { _id: id },
+                  { $set: { likedBy: likedBy } }
+                ).then(
+                  result => {
+                    res.json(result)
+                  }, err => {
+                    res.status(500).json(err)
+                  })
+              }, () => {
+                res.status(400).json({ error: 'Wrong Params' })
+              })
+            }, 150)
+          }, err => {
+            res.status(500).json(err)
+          })
+      } else {
+        res.status(403).json({ error: 'Not allowed' })
+      }
+    }, () => {
+      res.status(400).json({ error: 'Wrong Params' })
+    })
+  }
+}