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<?php // phpcs:ignore
class Snapshot_Model_Full_Local extends Snapshot_Model_Full_Abstract {
const MAX_BACKUPS = 3;
/**
* Gets model type
*
* Used in filtering implementation
*
* @return string Model type tag
*/
public function get_model_type () {
return 'local';
}
/**
* Gets a list of backups
*
* @return array A list of full backup items
*/
public function get_backups () {
return apply_filters(
$this->get_filter('get_backups'),
$this->_get_raw_backup_items()
);
}
/**
* Gets a local backup file instance path
*
* @param int $timestamp Timestamp for backup to resolve
*
* @return mixed Path to backup if local file exists, (bool)false otherwise
*/
public function get_backup ($timestamp) {
$backups = $this->_get_raw_backup_files();
$pattern = preg_quote(Snapshot_Helper_Backup::FINAL_PREFIX . '-' . $timestamp . '-', '/') . '.*\.zip$';
$result = false;
if (empty($backups)) return $result;
foreach ($backups as $path) {
if (!preg_match("/{$pattern}/", $path)) continue;
$result = $path;
break;
}
return $result;
}
/**
* Deletes a local backup instance
*
* @param int $timestamp Timestamp for backup to resolve
*
* @return bool
*/
public function delete_backup ($timestamp) {
$path = $this->get_backup($timestamp);
if (empty($path)) return false;
if ( ! is_writable( $path ) ) return false;
return unlink($path);
}
/**
* Check if the timestamp backup exists locally
*
* @param int $timestamp Timestamp for backup to resolve
*
* @return bool
_*/
public function has_backup ($timestamp) {
$path = $this->get_backup($timestamp);
return !empty($path);
}
/**
* Rotates local backups
*
* @return bool
*/
public function rotate_backups () {
$to_remove = array();
$raw_list = $this->_get_raw_backup_items();
$count = count($raw_list);
$max_items = defined('SNAPSHOT_MAX_LOCAL_MANAGED_BACKUPS') && SNAPSHOT_MAX_LOCAL_MANAGED_BACKUPS
? (int)constant(SNAPSHOT_MAX_LOCAL_MANAGED_BACKUPS)
: self::MAX_BACKUPS
;
if (empty($max_items) || $count <= $max_items) return true; // Already there
Snapshot_Helper_Log::info("Preparing to rotate local backups: {$max_items} to keep around");
$max_removal = count($raw_list) - $max_items;
$oldest_item = $this->_get_oldest_file_item($raw_list);
$oldest = !empty($oldest_item)
? $oldest_item['name']
: false
;
foreach (range(1, $max_removal) as $idx) {
$item = $this->_get_newer_file_item($raw_list, $oldest);
if (empty($item)) {
break; // No more oldest files
}
$oldest = $item['name'];
$to_remove[] = $item['timestamp'];
}
if (empty($to_remove)) return true; // Done already
$status = true;
foreach ($to_remove as $rmv) {
Snapshot_Helper_Log::note("Removing local backup item {$rmv}");
if (!$this->delete_backup($rmv)) {
Snapshot_Helper_Log::error("Error rotating local backup item {$rmv}");
$status = false;
}
}
return $status;
}
/**
* Get a list of raw local full backup filepaths
*
* @return array
*/
private function _get_raw_backup_files () {
$root = trailingslashit(WPMUDEVSnapshot::instance()->get_setting('backupBaseFolderFull'));
$pattern = Snapshot_Helper_Backup::FINAL_PREFIX . '*.zip';
$list = glob($root . $pattern);
return !empty($list)
? $list
: array()
;
}
/**
* Gets a list of backup items from local files
*
* @return array
*/
private function _get_raw_backup_items () {
$list = $this->_get_raw_backup_files();
$result = array();
foreach ($list as $raw) {
$timestamp = $this->_get_file_timestamp_from_name(basename($raw));
if (empty($timestamp)) continue;
$result[] = array(
'name' => basename($raw),
'size' => filesize($raw),
'timestamp' => $timestamp,
'local' => true,
);
}
return $result;
}
}