1 files changed, 35 insertions, 0 deletions
diff --git a/goodgame/src/utils/common.js b/goodgame/src/utils/common.js
new file mode 100644
index 0000000..7f40658
--- /dev/null
+++ b/goodgame/src/utils/common.js
@@ -0,0 +1,35 @@
+const { validationResult } = require('express-validator/check');
+
+const formatResponse = (status, data) => ({ ok: status, response: data });
+
+const validatorMiddleware = (req, res, next) => {
+  const errorFormatter = ({ msg, param }) => `${param}: ${msg}`;
+  const errors = validationResult(req).formatWith(errorFormatter);
+  if (!errors.isEmpty()) {
+    return res.status(422).json(formatResponse(false, errors.array()));
+  }
+  return next();
+};
+
+const getRandomArbitrary = (min, max) => {
+  return Math.random() * (max - min) + min;
+};
+
+const shuffle = array => {
+  let j;
+  let x;
+  for (let i = array.length - 1; i > 0; i -= 1) {
+    j = Math.floor(Math.random() * (i + 1));
+    x = array[i];
+    array[i] = array[j];
+    array[j] = x;
+  }
+  return array;
+};
+
+module.exports = {
+  formatResponse,
+  validatorMiddleware,
+  getRandomArbitrary,
+  shuffle,
+};