auto_backup.php

<?php
require_once 'includes/functions.php';

// This script is meant to be called via cron job to create automated backups

// Check for security token to prevent unauthorized access
if (!isset($_GET['token']) || $_GET['token'] !== 'YOUR_SECURE_TOKEN_HERE') {
    http_response_code(403);
    echo 'Access denied';
    exit;
}

// Get cloud backup settings
$settings = getCloudBackupSettings();

// Check if automated backups are enabled
if (!$settings || !isset($settings['auto_backup']) || !$settings['auto_backup']) {
    echo 'Automated backups are not enabled';
    exit;
}

// Check if it's time for a backup based on frequency
$lastSync = isset($settings['last_sync']) ? $settings['last_sync'] : 0;
$now = time();
$shouldBackup = false;

switch ($settings['frequency']) {
    case 'hourly':
        $shouldBackup = ($now - $lastSync) >= 3600; // 1 hour
        break;
    case 'daily':
        $shouldBackup = ($now - $lastSync) >= 86400; // 24 hours
        break;
    case 'weekly':
        $shouldBackup = ($now - $lastSync) >= 604800; // 7 days
        break;
    case 'monthly':
        $shouldBackup = ($now - $lastSync) >= 2592000; // 30 days
        break;
    default:
        $shouldBackup = true; // Default to backing up if frequency is unknown
        break;
}

if (!$shouldBackup) {
    echo 'No backup needed at this time';
    exit;
}

// Create backup archive
$backupFile = createBackupArchive(true);

if (!$backupFile) {
    http_response_code(500);
    echo 'Failed to create backup archive';
    exit;
}

// Upload to cloud service if cloud providers file exists
if (file_exists(__DIR__ . '/includes/cloud/providers.php')) {
    require_once __DIR__ . '/includes/cloud/providers.php';
    
    $cloudProvider = $settings['provider'];
    $cloudApiKey = $settings['api_key'];
    $cloudFolder = $settings['folder'] ?: '/backups';
    $remotePath = $cloudFolder . '/' . basename($backupFile);
    
    $credentials = [
        'api_key' => $cloudApiKey,
        // Add other credentials as needed
    ];
    
    $cloudStorage = CloudStorageFactory::create($cloudProvider, $credentials);
    if ($cloudStorage && $cloudStorage->authenticate($credentials)) {
        $result = $cloudStorage->uploadFile($backupFile, $remotePath);
        if ($result === true) {
            echo "Successfully uploaded to $cloudProvider: " . basename($backupFile) . "\n";
        } else {
            echo "Upload failed: $result\n";
        }
    } else {
        echo "Could not authenticate with $cloudProvider\n";
    }
} else {
    // Simulate cloud upload based on provider
    $cloudProvider = $settings['provider'];
    $cloudApiKey = $settings['api_key'];
    $cloudFolder = $settings['folder'] ?: '/backups';
    
    echo "Simulating upload to $cloudProvider...\n";
    echo "Using folder: $cloudFolder\n";
    echo "File being uploaded: " . basename($backupFile) . "\n";
}

// Here you would add code for specific providers:
// For Dropbox:
// $dropbox = new \Dropbox\Client($cloudApiKey, "PHP Invoice Generator");
// $result = $dropbox->uploadFile($cloudFolder . "/" . basename($backupFile), \Dropbox\WriteMode::add(), file_get_contents($backupFile));

// For Google Drive:
// $googleClient = new \Google\Client();
// $googleClient->setAuthConfig($credentials);
// $service = new \Google\Service\Drive($googleClient);
// Upload file...

// Update the last_sync timestamp
$settings['last_sync'] = $now;
$result = saveCloudBackupSettings($settings);

if ($result) {
    echo 'Backup created and uploaded successfully: ' . basename($backupFile);
} else {
    http_response_code(500);
    echo 'Failed to update backup settings';
}
?>