Implement sha256 checksum calculation controller (buerokratt#57)

* Implement sha256 checksum calculation method

* Add dependencies

controllers/utils.js

@@ -1,4 +1,6 @@
 import express from "express";
+import { createHash } from "crypto";
+import bodyParser from "body-parser";
 import { body, matchedData, validationResult } from "express-validator";
 
 const router = express.Router();
@@ -27,6 +29,19 @@ router.post("/object-list-contains-id", async (req, res) => {
   res.json(exists);
 });
 
+router.post(
+  "/calculate-sha256-checksum",
+  bodyParser.text({ type: "text/plain" }),
+  async (req, res) => {
+    if (Object.keys(req.body).length === 0) {
+      return res.status(400).json("error: request body is empty");
+    }
+    const hash = createHash("sha256");
+    hash.update(req.body);
+    res.send(hash.digest("hex"));
+  }
+);
+
 function checkIdExists(array, id) {
   for (const element of array) {
     if (element.id === id) return true;

package.json

@@ -7,6 +7,7 @@
     "start": "node server.js"
   },
   "dependencies": {
+    "body-parser": "^1.20.2",
     "crypto-js": "^4.1.1",
     "escape-string-regexp": "^5.0.0",
     "express": "^4.18.2",