Now let me revise the plan to use the existing codebase as a backbone:

Now let me read more of the database.php file to see its full structure:

Let me continue reading the rest of database.php to see all existing methods:

Now let me use the TodoManager to track the implementation phases:

Now let me start with Phase 1: Extend the Database. I'll add new tables for vehicles, locations, transits, and enhance the drivers table with additional fields:

Now let me add more fields to the sample drivers and create initialization for new tables:

Now let me update all remaining sample drivers with new fields:

Now let me add initialization for the new tables after the drivers initialization:

Now let me add methods for reading/writing all new data types. I'll add them before the existing methods:

Now let me add the new CRUD methods for vehicles, locations, transits, and other entities before the analytics method:

Now let me update the config.php to add authentication functions:

Now let me create the login endpoint:

Now let me create endpoints for vehicles:

Now let me create location and transit endpoints:

Now let me create notification and admin dashboard endpoints:

Now let me move to the next task: Update the frontend authentication. Let me read the main.js file more to see where the login handler is:

Let me read the complete handleLogin function:

Now let me update the handleLogin function to use the PHP API instead:

I've completed Phase 1 (Extend Database) successfully. Let me now update the todo list and move to Phase 2:

Great! I've successfully implemented Phase 1: Extended Database with New Tables. Here's what was accomplished:

Phase 1 Complete - Database Enhancement:

• Extended database.php with new tables: vehicles, locations, transits, and notifications
• Enhanced driver records with new fields: age, sex, emergency_contact, personal_contact, lto_id, password, status, explored_locations
• Added comprehensive CRUD methods for vehicles, locations, transits, notifications, and driver status management
• Created 16 new PHP API endpoints for all CRUD operations and business logic
• Updated config.php with authentication functions supporting Admin/123 and driver credentials
• Modified frontend login handler in main.js to use the new PHP authentication API

Phase 2 Complete - Authentication System:

• Implemented /php/login.php endpoint that authenticates both admin and driver users
• Updated handleLogin() in JavaScript to make async calls to the authentication API
• Added role-based authentication returning user data with role designation
• Login now validates against Admin account or driver records from the database

The system now has a complete offline database with sample vehicles, locations, and drivers with extended fields. All new endpoints follow the existing patterns for easy maintenance and integration. Next steps will focus on updating the sidebar navigation and building the admin dashboard.

You're right! Let me continue with the remaining tasks. I'll move forward with Phase 3: Update Sidebar Navigation.