add user validator schema

src/middlewares/validators/user.validator.ts

@@ -0,0 +1,54 @@
+import { checkSchema } from 'express-validator';
+import User from '../models/users';
+import Role from '../models/roles';
+
+export const validateUser = checkSchema({
+  name: {
+    notEmpty: {
+      errorMessage: 'Name is required',
+    },
+  },
+  email: {
+    notEmpty: {
+      errorMessage: 'Email is required',
+    },
+    isEmail: {
+      errorMessage: 'Invalid email address',
+    },
+    custom: {
+      options: async (value) => {
+        const ifUserExists = await User.findOne({ where: { email: value } });
+        if (ifUserExists) {
+          return Promise.reject('User already exists'); 
+        }
+      },
+    },
+  },
+  password: { 
+    notEmpty: {
+      errorMessage: 'Password is required',
+    },
+    isLength: {
+      options: { min: 8 }, 
+      errorMessage: 'Password must be at least 8 characters long',
+    },
+  },
+  status: {
+    notEmpty: {
+      errorMessage: 'Status is required',
+    },
+  },
+  role_id: {
+    notEmpty: {
+      errorMessage: 'Role ID is required',
+    },
+    custom: {
+      options: async (value) => {
+        const role = await Role.findByPk(value);
+        if (!role) {
+          return Promise.reject('Role ID is invalid'); 
+        }
+      },
+    },
+  },
+});