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📄 Viewing: ./../../l7-pro-2-e-learning-2023-Epolleke/php/../php/login.php

<?php
/**
 * API Endpoint: User Login
 * POST parameters:
 *   - username: Username or email
 *   - password: Plain text password
 */

session_start();

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST');
header('Access-Control-Allow-Headers: Content-Type');
header('Access-Control-Allow-Credentials: true');

require_once 'config.php';

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
    http_response_code(200);
    exit();
}

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['success' => false, 'error' => 'Method not allowed']);
    exit();
}

try {
    $input = json_decode(file_get_contents('php://input'), true);
    
    if (json_last_error() !== JSON_ERROR_NONE) {
        throw new Exception('Invalid JSON: ' . json_last_error_msg());
    }
    
    if (!isset($input['username']) || !isset($input['password'])) {
        throw new Exception('Username and password are required');
    }
    
    $username = trim($input['username']);
    $password = $input['password'];
    
    $pdo = getDbConnection();
    
    // Find user by username or email
    $stmt = $pdo->prepare("
        SELECT user_id, username, email, password_hash, full_name, is_active
        FROM users
        WHERE (username = :username OR email = :email) AND is_active = 1
    ");
    $stmt->execute([
        ':username' => $username,
        ':email' => $username
    ]);
    $user = $stmt->fetch();
    
    if (!$user) {
        throw new Exception('Invalid username or password');
    }
    
    // Verify password
    if (!password_verify($password, $user['password_hash'])) {
        throw new Exception('Invalid username or password');
    }
    
    // Update last login
    $stmt = $pdo->prepare("UPDATE users SET last_login = CURRENT_TIMESTAMP WHERE user_id = :user_id");
    $stmt->execute([':user_id' => $user['user_id']]);
    
    // Set session
    $_SESSION['user_id'] = $user['user_id'];
    $_SESSION['username'] = $user['username'];
    $_SESSION['email'] = $user['email'];
    $_SESSION['full_name'] = $user['full_name'];
    
    echo json_encode([
        'success' => true,
        'message' => 'Login successful',
        'user' => [
            'user_id' => $user['user_id'],
            'username' => $user['username'],
            'email' => $user['email'],
            'full_name' => $user['full_name']
        ],
        'session_id' => session_id()
    ]);
    
} catch (Exception $e) {
    http_response_code(401);
    echo json_encode([
        'success' => false,
        'error' => $e->getMessage()
    ]);
}

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