Add new Frontend API folder

frontend/src/api/utils/validation.ts

@@ -0,0 +1,72 @@
+// frontend/src/api/utils/validation.ts
+/**
+ * Request Validation Utilities
+ */
+
+export class RequestValidator {
+  static validateEmail(email: string): boolean {
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    return emailRegex.test(email);
+  }
+
+  static validatePassword(password: string): {
+    valid: boolean;
+    errors: string[];
+  } {
+    const errors: string[] = [];
+    
+    if (password.length < 8) {
+      errors.push('Password must be at least 8 characters long');
+    }
+    
+    if (!/(?=.*[a-z])/.test(password)) {
+      errors.push('Password must contain at least one lowercase letter');
+    }
+    
+    if (!/(?=.*[A-Z])/.test(password)) {
+      errors.push('Password must contain at least one uppercase letter');
+    }
+    
+    if (!/(?=.*\d)/.test(password)) {
+      errors.push('Password must contain at least one number');
+    }
+    
+    return {
+      valid: errors.length === 0,
+      errors,
+    };
+  }
+
+  static validateFile(file: File, allowedTypes: string[], maxSize: number): {
+    valid: boolean;
+    errors: string[];
+  } {
+    const errors: string[] = [];
+    
+    if (!allowedTypes.includes(file.type)) {
+      errors.push(`File type ${file.type} is not allowed`);
+    }
+    
+    if (file.size > maxSize) {
+      errors.push(`File size exceeds maximum of ${maxSize} bytes`);
+    }
+    
+    return {
+      valid: errors.length === 0,
+      errors,
+    };
+  }
+
+  static validatePhoneNumber(phone: string): boolean {
+    // Basic international phone number validation
+    const phoneRegex = /^\+?[1-9]\d{1,14}$/;
+    return phoneRegex.test(phone.replace(/\s/g, ''));
+  }
+
+  static validateRequired(value: any, fieldName: string): string | null {
+    if (value === null || value === undefined || value === '') {
+      return `${fieldName} is required`;
+    }
+    return null;
+  }
+}