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| 1 | <?php |
| 2 | /** |
| 3 | * FileRestorer file. |
| 4 | * |
| 5 | * @package wpcomsh |
| 6 | */ |
| 7 | |
| 8 | namespace Imports\Utils; |
| 9 | |
| 10 | require_once __DIR__ . '/../class-backup-import-action.php'; |
| 11 | |
| 12 | use RecursiveDirectoryIterator; |
| 13 | use RecursiveIteratorIterator; |
| 14 | use SplQueue; |
| 15 | use WP_Error; |
| 16 | |
| 17 | /** |
| 18 | * Class FileRestorer |
| 19 | * |
| 20 | * The FileRestorer class is used to restore files from a source directory |
| 21 | * to a destination directory. It uses a queue to manage the files to be |
| 22 | * restored, and it can optionally log its operations. |
| 23 | */ |
| 24 | class FileRestorer extends \Imports\Backup_Import_Action { |
| 25 | /** |
| 26 | * The source directory from which files will be restored. |
| 27 | * |
| 28 | * @var string |
| 29 | */ |
| 30 | private $source_dir; |
| 31 | /** |
| 32 | * The destination directory to which files will be restored. |
| 33 | * |
| 34 | * @var string |
| 35 | */ |
| 36 | private $dest_dir; |
| 37 | /** |
| 38 | * The queue that manages the files to be restored. |
| 39 | * |
| 40 | * @var \SplQueue |
| 41 | */ |
| 42 | private $queue; |
| 43 | /** |
| 44 | * The list of symlinked directories. |
| 45 | * |
| 46 | * @var array |
| 47 | */ |
| 48 | private $symlinked_dirs; |
| 49 | /** |
| 50 | * The total number of files to be restored. |
| 51 | * |
| 52 | * @var int |
| 53 | */ |
| 54 | private $total_count; |
| 55 | const THEMES_DIR = 'wp-content/themes/'; |
| 56 | const PLUGINS_DIR = 'wp-content/plugins/'; |
| 57 | |
| 58 | /** |
| 59 | * FileRestorer constructor. |
| 60 | * |
| 61 | * Initializes a new instance of the FileRestorer class with the specified |
| 62 | * source directory, destination directory, and optional logger. |
| 63 | * |
| 64 | * @param string $source_dir The source directory. |
| 65 | * @param string $dest_dir The destination directory. |
| 66 | * @param null|LoggerInterface $logger An optional logger. |
| 67 | */ |
| 68 | public function __construct( $source_dir, $dest_dir, $logger = null ) { |
| 69 | parent::__construct( $logger ); |
| 70 | $this->source_dir = trailingslashit( $source_dir ); |
| 71 | $this->dest_dir = trailingslashit( $dest_dir ); |
| 72 | $this->queue = new SplQueue(); |
| 73 | $this->total_count = 0; |
| 74 | $this->symlinked_dirs = array(); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Enqueues the files to be restored. |
| 79 | * |
| 80 | * This method iterate over the files in the source directory and enqueue them for restoration. |
| 81 | * |
| 82 | * @return bool|\WP_Error True if at least one file was enqueued, or a WP_Error if no files were enqueued. |
| 83 | */ |
| 84 | public function enqueue_files() { |
| 85 | $dir_iterator = new RecursiveDirectoryIterator( $this->source_dir, RecursiveDirectoryIterator::SKIP_DOTS ); |
| 86 | $iterator = new RecursiveIteratorIterator( $dir_iterator, RecursiveIteratorIterator::SELF_FIRST ); |
| 87 | $this->symlinked_dirs = $this->get_symlinked_dirs(); |
| 88 | foreach ( $iterator as $fileinfo ) { |
| 89 | if ( $fileinfo->isFile() && $this->should_enqueue_file( $fileinfo ) ) { |
| 90 | $this->queue->enqueue( $this->create_file_info_array( $fileinfo ) ); |
| 91 | ++$this->total_count; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | $this->log( "Total files to copy: $this->total_count" ); |
| 96 | if ( $this->total_count === 0 ) { |
| 97 | return new WP_Error( 'file_queue_failed', __( 'No files are queued.', 'wpcomsh' ) ); |
| 98 | } |
| 99 | // This shouldn't be a hard stop, but we should log it. |
| 100 | $this->install_default_themes(); |
| 101 | |
| 102 | return true; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Restores files from the source directory to the destination directory. |
| 107 | * |
| 108 | * This method dequeues files from the queue and copies them from the source directory to the destination directory. |
| 109 | * It skips files that are inside a symlinked theme or plugin, or that are symbolic links themselves. |
| 110 | * It also creates any necessary directories in the destination directory. |
| 111 | * If a file cannot be copied for any reason, it is logged and the copy operation continues with the next file. |
| 112 | * After all files have been processed, it logs the number of files copied, skipped, and failed. |
| 113 | * If no files were copied, it returns a WP_Error; otherwise, it returns true. |
| 114 | * |
| 115 | * @return bool|\WP_Error True if at least one file was copied, or a WP_Error if no files were copied. |
| 116 | */ |
| 117 | public function restore_files() { |
| 118 | $file_seen_count = 0; |
| 119 | $copied_count = 0; |
| 120 | $skipped_count = 0; |
| 121 | $failed_count = 0; |
| 122 | |
| 123 | while ( ! $this->queue->isEmpty() ) { |
| 124 | $file_info_array = $this->queue->dequeue(); |
| 125 | $file_path = $file_info_array['source_file_path']; |
| 126 | $dest_path = $file_info_array['dest_file_path']; |
| 127 | $relative_path = $file_info_array['relative_file_path']; |
| 128 | $file_type = $file_info_array['file_type']; |
| 129 | ++$file_seen_count; |
| 130 | |
| 131 | // Skip if the file is inside a symlinked theme or plugin |
| 132 | if ( $file_type === 'theme_files' || $file_type === 'plugin_files' ) { |
| 133 | if ( $this->is_in_symlinked_directory( $file_type, $relative_path ) ) { |
| 134 | ++$skipped_count; |
| 135 | $this->log( "$file_seen_count/$this->total_count entries seen. $relative_path is inside a symlinked directory, skipping..." ); |
| 136 | continue; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | if ( is_link( $dest_path ) ) { |
| 141 | ++$skipped_count; |
| 142 | $this->log( "$file_seen_count/$this->total_count entries seen. $relative_path is a symbolic link, skipping..." ); |
| 143 | continue; |
| 144 | } |
| 145 | |
| 146 | if ( ! is_dir( dirname( $dest_path ) ) ) { |
| 147 | if ( ! wp_mkdir_p( dirname( $dest_path ) ) ) { |
| 148 | $this->log( 'Failed to create directory ' . dirname( $dest_path ) ); |
| 149 | continue; |
| 150 | } else { |
| 151 | $this->log( 'Created directory ' . dirname( $dest_path ) ); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | if ( ! copy( $file_path, $dest_path ) ) { |
| 156 | ++$failed_count; |
| 157 | $this->log( "$file_seen_count/$this->total_count entries seen. Failed to copy: $relative_path" ); |
| 158 | } else { |
| 159 | ++$copied_count; |
| 160 | $this->log( "$file_seen_count/$this->total_count entries seen. Restoring: $relative_path" ); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | $this->log( "Finished copying $this->total_count files. Copied: $copied_count files. Skipped: $skipped_count files. Failed: $failed_count files." ); |
| 165 | |
| 166 | if ( $copied_count === 0 ) { |
| 167 | return new \WP_Error( 'file_restoration_failed', __( 'No files are restored.', 'wpcomsh' ) ); |
| 168 | } |
| 169 | |
| 170 | return true; |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * Retrieves the list of symlinked directories. |
| 175 | * |
| 176 | * This method iterates over the themes and plugins directories in the source directory, |
| 177 | * and checks each subdirectory to determine if it is symlinked in the destination directory. |
| 178 | * If a subdirectory is symlinked, or if it is a plugin directory managed by us, its name is added to the list. |
| 179 | * |
| 180 | * @return array The list of symlinked directory names. |
| 181 | */ |
| 182 | private function get_symlinked_dirs() { |
| 183 | $dirs = array( |
| 184 | $this->source_dir . self::THEMES_DIR, |
| 185 | $this->source_dir . self::PLUGINS_DIR, |
| 186 | ); |
| 187 | $symlinked_dirs = array(); |
| 188 | |
| 189 | foreach ( $dirs as $dir ) { |
| 190 | $dir_iterator = array(); |
| 191 | |
| 192 | try { |
| 193 | $dir_iterator = new \DirectoryIterator( $dir ); |
| 194 | } catch ( \Exception $e ) { |
| 195 | // The directory does not exist. |
| 196 | continue; |
| 197 | } |
| 198 | |
| 199 | foreach ( $dir_iterator as $fileinfo ) { |
| 200 | $dest_dir = str_replace( $this->source_dir, $this->dest_dir, $fileinfo->getPathname() ); |
| 201 | // check if it's symlinked and not a dot directory on destination |
| 202 | if ( $fileinfo->isDir() && ! $fileinfo->isDot() ) { |
| 203 | $dir_name = str_replace( $this->dest_dir, '', $dest_dir ); |
| 204 | // if it's not exist on destination, skip it |
| 205 | if ( ! is_dir( $dest_dir ) ) { |
| 206 | continue; |
| 207 | } |
| 208 | if ( is_link( $dest_dir ) ) { |
| 209 | $symlinked_dirs[] = $dir_name; |
| 210 | } elseif ( strpos( $dir_name, self::PLUGINS_DIR ) === 0 ) { |
| 211 | // if it's a plugin directory, check if the plugin is managed by us |
| 212 | $parts = explode( '/', $dir_name ); |
| 213 | // Last part is the plugin directory name |
| 214 | $plugin_to_symlink = array_pop( $parts ); |
| 215 | if ( $this->is_plugin_symlinked( $plugin_to_symlink ) ) { |
| 216 | $symlinked_dirs[] = $dir_name; |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | return $symlinked_dirs; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * Determines if a file should be enqueued for restoration. |
| 228 | * |
| 229 | * This method checks if a file is excluded from restoration. If the file is excluded, |
| 230 | * it logs a message and returns false. Otherwise, it returns true. |
| 231 | * |
| 232 | * @param \SplFileInfo $fileinfo The file to check. |
| 233 | * @return bool True if the file should be enqueued, false otherwise. |
| 234 | */ |
| 235 | private function should_enqueue_file( $fileinfo ) { |
| 236 | $source_file_path = $fileinfo->getRealPath(); |
| 237 | $relative_file_path = str_replace( $this->source_dir, '', $source_file_path ); |
| 238 | |
| 239 | if ( $this->is_file_excluded( $source_file_path ) ) { |
| 240 | $this->log( "Excluded: $relative_file_path" ); |
| 241 | return false; |
| 242 | } |
| 243 | |
| 244 | return true; |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Creates an array of file information for a given file. |
| 249 | * |
| 250 | * This method takes a SplFileInfo object and returns an array containing the source file path, |
| 251 | * destination file path, relative file path, and file type. |
| 252 | * |
| 253 | * @param \SplFileInfo $fileinfo The file to create information for. |
| 254 | * @return array An array containing the source file path, destination file path, relative file path, and file type. |
| 255 | */ |
| 256 | private function create_file_info_array( $fileinfo ) { |
| 257 | $source_file_path = $fileinfo->getRealPath(); |
| 258 | $relative_file_path = str_replace( $this->source_dir, '', $source_file_path ); |
| 259 | |
| 260 | return array( |
| 261 | 'source_file_path' => $source_file_path, |
| 262 | 'dest_file_path' => str_replace( $this->source_dir, $this->dest_dir, $source_file_path ), |
| 263 | 'relative_file_path' => $relative_file_path, |
| 264 | 'file_type' => $this->get_file_type( $relative_file_path ), |
| 265 | ); |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Checks if a file is in a symlinked directory. |
| 270 | * |
| 271 | * This method checks if the specified file, identified by its type and path, |
| 272 | * is located within a symlinked directory. It does this by extracting the |
| 273 | * extension slug from the file path and checking if the resulting directory |
| 274 | * is in the list of symlinked directories. |
| 275 | * |
| 276 | * @param string $file_type The type of the file ('theme_files', 'plugin_files', or 'regular_files'). |
| 277 | * @param string $file_path The path of the file to check. |
| 278 | * @return bool True if the file is in a symlinked directory, false otherwise. |
| 279 | */ |
| 280 | private function is_in_symlinked_directory( $file_type, $file_path ) { |
| 281 | $slug = $this->get_extension_slug_from_path( $file_path ); |
| 282 | $dir = null; |
| 283 | if ( $slug ) { |
| 284 | if ( $file_type === 'theme_files' ) { |
| 285 | $dir = self::THEMES_DIR . $slug; |
| 286 | } else { |
| 287 | $dir = self::PLUGINS_DIR . $slug; |
| 288 | } |
| 289 | } |
| 290 | if ( in_array( $dir, $this->symlinked_dirs, true ) ) { |
| 291 | return true; |
| 292 | } |
| 293 | |
| 294 | return false; |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Extracts the extension slug from a file path. |
| 299 | * |
| 300 | * This method checks if the specified file path is part of a theme or a plugin, |
| 301 | * and if so, extracts and returns the extension slug. If the file is not part of a theme or a plugin, |
| 302 | * it returns null. |
| 303 | * |
| 304 | * @param string $file_path The path of the file to check. |
| 305 | * @return string|null The extension slug if the file is part of a theme or a plugin, or null otherwise. |
| 306 | */ |
| 307 | private function get_extension_slug_from_path( $file_path ) { |
| 308 | $dir = dirname( $file_path ); |
| 309 | if ( strpos( $dir, self::THEMES_DIR ) === 0 ) { |
| 310 | $relative_path = substr( $dir, strlen( self::THEMES_DIR ) ); |
| 311 | $slug = explode( '/', $relative_path )[0]; |
| 312 | return $slug; |
| 313 | } |
| 314 | |
| 315 | if ( strpos( $dir, self::PLUGINS_DIR ) === 0 ) { |
| 316 | $relative_path = substr( $dir, strlen( self::PLUGINS_DIR ) ); |
| 317 | $slug = explode( '/', $relative_path )[0]; |
| 318 | return $slug; |
| 319 | } |
| 320 | |
| 321 | return null; |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * Determines the type of a file based on its path. |
| 326 | * |
| 327 | * This method checks if the specified file path is part of a theme or a plugin, |
| 328 | * and returns a string indicating its type. |
| 329 | * |
| 330 | * @param string $file_path The path of the file to check. |
| 331 | * @return string 'theme_files' if the file is part of a theme, 'plugin_files' if the file is part of a plugin, or 'regular_files' otherwise. |
| 332 | */ |
| 333 | public function get_file_type( $file_path ) { |
| 334 | |
| 335 | if ( $this->is_theme_file( $file_path ) ) { |
| 336 | return 'theme_files'; |
| 337 | } |
| 338 | |
| 339 | if ( $this->is_plugin_file( $file_path ) ) { |
| 340 | return 'plugin_files'; |
| 341 | } |
| 342 | |
| 343 | return 'regular_files'; |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * Checks if a file is part of a themes. |
| 348 | * |
| 349 | * @param string $file_path The path of the file to check. |
| 350 | * @return bool True if the file is part of a themes, false otherwise. |
| 351 | */ |
| 352 | public function is_theme_file( $file_path ) { |
| 353 | if ( strpos( $file_path, self::THEMES_DIR ) !== false ) { |
| 354 | return true; |
| 355 | } |
| 356 | |
| 357 | return false; |
| 358 | } |
| 359 | /** |
| 360 | * Checks if a file is part of a plugins. |
| 361 | * |
| 362 | * @param string $file_path The path of the file to check. |
| 363 | * @return bool True if the file is part of a plugins, false otherwise. |
| 364 | */ |
| 365 | public function is_plugin_file( $file_path ) { |
| 366 | if ( strpos( $file_path, self::PLUGINS_DIR ) !== false ) { |
| 367 | return true; |
| 368 | } |
| 369 | |
| 370 | return false; |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * Checks if a plugin is symlinked. |
| 375 | * |
| 376 | * This method checks if the specified plugin is symlinked by checking |
| 377 | * if the realpath of the plugin's relative path exists. |
| 378 | * |
| 379 | * @param string $plugin_to_symlink The name of the plugin to check. |
| 380 | * @return bool True if the plugin is symlinked, false otherwise. |
| 381 | */ |
| 382 | public function is_plugin_symlinked( $plugin_to_symlink ) { |
| 383 | $managed_plugin_relative_path = "/../../../../wordpress/plugins/$plugin_to_symlink/latest"; |
| 384 | if ( realpath( $managed_plugin_relative_path ) !== false ) { |
| 385 | return true; |
| 386 | } |
| 387 | return false; |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * Checks if a file should be excluded from restoration. |
| 392 | * |
| 393 | * This method checks if a file matches any of the exclusion patterns |
| 394 | * defined in the get_file_exclusion_list method. |
| 395 | * |
| 396 | * @param string $path The path of the file to check. |
| 397 | * @return bool True if the file should be excluded, false otherwise. |
| 398 | */ |
| 399 | public function is_file_excluded( $path ) { |
| 400 | foreach ( $this->get_file_exclusion_list() as $exclusion ) { |
| 401 | if ( preg_match( $exclusion['pattern'], $path ) ) { |
| 402 | return true; |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | return false; |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Installs default themes on the destination site via wp cli and skip if it's already symlinked. |
| 411 | * |
| 412 | * This function scans the themes directory in the source directory, identifies the default themes, |
| 413 | * and installs them on the destination site if they are not already installed. |
| 414 | */ |
| 415 | public function install_default_themes() { |
| 416 | $source_themes_dir = $this->source_dir . self::THEMES_DIR; |
| 417 | $dest_themes_dir = $this->dest_dir . self::THEMES_DIR; |
| 418 | |
| 419 | if ( ! is_dir( $source_themes_dir ) ) { |
| 420 | $this->log( 'Install default themes: Source themes directory does not exist.' ); |
| 421 | // Handle the case where the source themes directory does not exist |
| 422 | return; |
| 423 | } |
| 424 | |
| 425 | $default_themes = glob( $source_themes_dir . '/twentytwenty*', GLOB_ONLYDIR ); |
| 426 | |
| 427 | foreach ( $default_themes as $theme_dir ) { |
| 428 | $theme_slug = basename( $theme_dir ); |
| 429 | if ( ! is_dir( $dest_themes_dir . '/' . $theme_slug ) ) { |
| 430 | // The theme is not installed on the destination site, so install it |
| 431 | $this->log( 'Installing theme: ' . $theme_slug ); |
| 432 | $result = self::install_theme( $theme_slug ); |
| 433 | $this->log( 'Install theme result: ' . $result ); |
| 434 | } |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * Returns the list of file exclusion patterns. |
| 440 | * |
| 441 | * @return array The list of file exclusion patterns. |
| 442 | */ |
| 443 | public function get_file_exclusion_list() { |
| 444 | return array( |
| 445 | array( |
| 446 | 'pattern' => '/\/wp-admin\//', |
| 447 | 'message' => 'Excluded because path includes /wp-admin/.', |
| 448 | ), |
| 449 | array( |
| 450 | 'pattern' => '/\/wp-includes\//', |
| 451 | 'message' => 'Excluded because path includes /wp-includes/.', |
| 452 | ), |
| 453 | array( |
| 454 | 'pattern' => '/\.sql$/', |
| 455 | 'message' => 'Excluded because path is a .sql file.', |
| 456 | ), |
| 457 | array( |
| 458 | 'pattern' => '/\/wp-content\/mu-plugins\//', |
| 459 | 'message' => 'Excluded because path includes /wp-content/mu-plugins/', |
| 460 | ), |
| 461 | array( |
| 462 | 'pattern' => '/\/wp-content\/database\//', |
| 463 | 'message' => 'Excluded because path includes /wp-content/database/.', |
| 464 | ), |
| 465 | array( |
| 466 | 'pattern' => '/\/wp-content\/plugins\/wordpress-importer\//', |
| 467 | 'message' => 'Excluded because path includes /wp-content/plugins/wordpress-importer/.', |
| 468 | ), |
| 469 | array( |
| 470 | 'pattern' => '/\/wp-content\/plugins\/sqlite-database-integration\//', |
| 471 | 'message' => 'Excluded because path includes /wp-content/plugins/sqlite-database-integration/.', |
| 472 | ), |
| 473 | array( |
| 474 | 'pattern' => '/\/wp-config\.php$/', |
| 475 | 'message' => 'Excluded because file is wp-config.php.', |
| 476 | ), |
| 477 | array( |
| 478 | 'pattern' => '/\/wp-content\/themes\/twentytwenty.*/', |
| 479 | 'message' => 'Excluded because path includes a theme starting with twentytwenty.', |
| 480 | ), |
| 481 | ); |
| 482 | } |
| 483 | |
| 484 | /** |
| 485 | * Installs a theme using WP-CLI. |
| 486 | * |
| 487 | * @param string $theme_slug The slug of the theme to install. |
| 488 | * @return mixed |
| 489 | */ |
| 490 | public static function install_theme( $theme_slug ) { |
| 491 | return self::run_command( '--skip-plugins --skip-themes --format=json theme install ' . $theme_slug, array( 'return' => true ) ); |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * Run a WP-CLI command. |
| 496 | * |
| 497 | * @param string $command The command to run. |
| 498 | * @param array $args The arguments to pass to the command. |
| 499 | * |
| 500 | * @return mixed |
| 501 | */ |
| 502 | public static function run_command( $command, $args = array() ) { |
| 503 | if ( class_exists( 'WP_CLI' ) ) { |
| 504 | return \WP_CLI::runcommand( $command, $args ); |
| 505 | } |
| 506 | |
| 507 | return false; |
| 508 | } |
| 509 | } |