<?php
// Include database configuration
require_once 'database/db_config.php';

try {
    // Add designation column if it doesn't exist
    $column_exists = $conn->query("SHOW COLUMNS FROM users LIKE 'designation'");
    if ($column_exists->num_rows == 0) {
        if ($conn->query("ALTER TABLE users ADD COLUMN designation VARCHAR(255) DEFAULT NULL")) {
            echo "<p>Added designation column to users table successfully.</p>";
        } else {
            throw new Exception("Failed to add designation column: " . $conn->error);
        }
    } else {
        echo "<p>designation column already exists.</p>";
    }
    
    echo "<p>Database update completed.</p>";
    echo "<p><a href='users.php'>Return to Users Management</a></p>";
} catch (Exception $e) {
    echo "<p style='color: red;'>Error: " . $e->getMessage() . "</p>";
    echo "<p><a href='users.php'>Return to Users Management</a></p>";
}
?>