Create validator.js

src/utils/validator.js

@@ -0,0 +1,33 @@
+// utils/validator.js
+
+// Input validation utility
+class Validator {
+    static isEmail(email) {
+        const regex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+        return regex.test(email);
+    }
+
+    static isNotEmpty(value) {
+        return value && value.trim() !== '';
+    }
+
+    static isNumber(value) {
+        return !isNaN(value) && !isNaN(parseFloat(value));
+    }
+
+    static validateUser Input(input) {
+        const errors = [];
+        if (!this.isNotEmpty(input.username)) {
+            errors.push('Username is required.');
+        }
+        if (!this.isEmail(input.email)) {
+            errors.push('Invalid email format.');
+        }
+        if (!this.isNumber(input.age)) {
+            errors.push('Age must be a number.');
+        }
+        return errors.length > 0 ? errors : null;
+    }
+}
+
+module.exports = Validator;