Added validators

validators/validator.js

@@ -0,0 +1,49 @@
+//Help file with needed validators for API calls 
+
+const { body, validationResult } = require('express-validator')
+
+//Validation rules function for call of adding user to group
+const addUserValidationRules = () => {
+  return [
+    //Groupname min character length is 3 and no special characters in name
+    body('reqgroup').isAlphanumeric().isLength({min:3}),
+    //Username min character length is 3 and no special characters in name
+    body('requser').isAlphanumeric().isLength({min:3})
+
+  ]
+}
+//Validation rules function for call of adding permission to a user or group
+const addPermissionValidationRules = () => {
+    return [
+        //Group or user name min character length is 3 and no special characters in name
+        body('reqowner').isAlphanumeric().isLength({min:3}),
+        //Object name min character length is 3
+        body('reqobjname').isLength({min:3}),
+        //Permission type min character length is 3 and no special characters
+        body('reqtype').isAlphanumeric().isLength({min:3}),
+        //Owner type can be user or group
+        body('reqownertype').custom((value, {req, loc, pah}) => {
+            if (value.toLowerCase()==='group' || value.toLowerCase()==='user') {
+                return value;
+            }
+            else {
+                return false;
+            }
+        })
+
+    ]
+  }
+//Function to perform validation 
+const validate = (req, res, next) => {
+  const errors = validationResult(req)
+  if (errors.isEmpty()) {
+    return next();
+  }
+    return res.status(422).json('Error! Incorrect input data!');
+}
+
+module.exports = {
+    addUserValidationRules,
+    addPermissionValidationRules,
+    validate,
+}