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<?php class CAJ_ETPU_Plugin_Upgrader extends Plugin_Upgrader { public function install_package( $args = array() ) { global $wp_filesystem; error_reporting( E_ALL ); ini_set( 'display_errors', 1 ); if ( empty( $args['source'] ) \|\| empty( $args['destination'] ) ) { // Only run if the arguments we need are present. return parent::install_package( $args ); } $source_files = array_keys( $wp_filesystem->dirlist( $args['source'] ) ); $remote_destination = $wp_filesystem->find_folder( $args['destination'] ); // Locate which directory to copy to the new folder, This is based on the actual folder holding the files. if ( 1 === count( $source_files ) && $wp_filesystem->is_dir( trailingslashit( $args['source'] ) . $source_files[0] . '/' ) ) { // Only one folder? Then we want its contents. $destination = trailingslashit( $remote_destination ) . trailingslashit( $source_files[0] ); } elseif ( 0 === count( $source_files ) ) { // Looks like an empty zip, we'll let the default code handle this. return parent::install_package( $args ); } else { // It's only a single file, the upgrader will use the folder name of this file as the destination folder. Folder name is based on zip filename. $destination = trailingslashit( $remote_destination ) . trailingslashit( basename( $args['source'] ) ); } if ( is_dir( $destination ) ) { // This is an upgrade, clear the destination. $args['clear_destination'] = true; // Switch template strings to use upgrade terminology rather than install terminology. $this->upgrade_strings(); // Replace default remove_old string to make the messages more meaningful. $this->strings['installing_package'] = __( 'Upgrading the plugin…', 'easy-theme-and-plugin-upgrades' ); $this->strings['remove_old'] = __( 'Backing up the old version of the plugin…', 'easy-theme-and-plugin-upgrades' ); } return parent::install_package( $args ); } private function caj_get_plugin_data( $directory ) { $files = glob( $directory . '.php' ); if ( $files ) { foreach ( $files as $file ) { $info = get_plugin_data( $file, false, false ); if ( ! empty( $info['Name'] ) ) { $data = array( 'name' => $info['Name'], 'version' => $info['Version'], ); return $data; } } } return false; } public function clear_destination( $destination ) { global $wp_filesystem; if ( ! is_dir( $destination ) ) { // This is an installation not an upgrade. return parent::clear_destination( $destination ); } $data = $this->caj_get_plugin_data( $destination ); if ( false === $data ) { // The existing directory is not a valid plugin, skip backup. return parent::clear_destination( $destination ); } $backup_url = $this->caj_create_backup( $destination ); if ( ! is_wp_error( $backup_url ) ) { / translators: 1: plugin zip URL / $this->skin->feedback( sprintf( __( 'A backup zip file of the old plugin version can be downloaded <a href="%1$s">here</a>.', 'easy-theme-and-plugin-upgrades' ), $backup_url ) ); // Restore default strings and display the original remove_old message. $this->upgrade_strings(); $this->skin->feedback( 'remove_old' ); return parent::clear_destination( $destination ); } $this->skin->error( $backup_url ); $this->skin->feedback( __( 'Moving the old version of the plugin to a new directory…', 'easy-theme-and-plugin-upgrades' ) ); $new_name = basename( $destination ) . "-{$data['version']}"; $directory = dirname( $destination ); for ( $x = 0; $x < 20; $x++ ) { $test_name = $new_name . '-' . $this->get_random_characters( 10, 20 ); if ( ! is_dir( "$directory/$test_name" ) ) { $new_name = $test_name; break; } } if ( is_dir( "$directory/$new_name" ) ) { // We gave it our best effort. Time to give up on the idea of having a backup. $this->skin->error( __( 'Unable to find a new directory name to move the old version of the plugin to. No backup will be created.', 'easy-theme-and-plugin-upgrades' ) ); } else { $result = $wp_filesystem->move( $destination, "$directory/$new_name" ); if ( $result ) { / translators: 1: new plugin directory name / $this->skin->feedback( sprintf( __( 'Moved the old version of the plugin to a new plugin directory named %1$s. This directory should be backed up and removed from the site.', 'easy-theme-and-plugin-upgrades' ), "<code>$new_name</code>" ) ); } else { $this->skin->error( __( 'Unable to move the old version of the plugin to a new directory. No backup will be created.', 'easy-theme-and-plugin-upgrades' ) ); } } // Restore default strings and display the original remove_old message. $this->upgrade_strings(); $this->skin->feedback( 'remove_old' ); return parent::clear_destination( $destination ); } private function caj_create_backup( $directory ) { require_once( ABSPATH . 'wp-admin/includes/file.php' ); $wp_upload_dir = wp_upload_dir(); $zip_path = $wp_upload_dir['path']; $zip_url = $wp_upload_dir['url']; if ( ! is_dir( $zip_path ) ) { return new WP_Error( 'caj-etpu-cannot-backup-no-destination-path', __( 'A plugin backup can not be created since a destination path for the backup file could not be found.', 'easy-theme-and-plugin-upgrades' ) ); } $data = $this->caj_get_plugin_data( $directory ); $rand_string = $this->get_random_characters( 10, 20 ); $zip_file = basename( $directory ) . "-{$data['version']}-$rand_string.zip"; // Reduce the chance that a timeout will occur while creating the zip file. @set_time_limit( 600 ); // Attempt to increase memory limits. $this->set_minimum_memory_limit( '256M' ); $zip_path .= "/$zip_file"; $zip_url .= "/$zip_file"; require_once( ABSPATH . 'wp-admin/includes/class-pclzip.php' ); $archive = new PclZip( $zip_path ); $zip_result = $archive->create( $directory, PCLZIP_OPT_REMOVE_PATH, dirname( $directory ) ); if ( 0 === $zip_result ) { / translators: 1: zip error details / return new WP_Error( 'caj-etpu-cannot-backup-zip-failed', sprintf( __( 'A plugin backup can not be created as creation of the zip file failed with the following error: %1$s', 'easy-theme-and-plugin-upgrades' ), $archive->errorInfo( true ) ) ); } $attachment = array( 'post_mime_type' => 'application/zip', 'guid' => $zip_url, / translators: 1: plugin name, 2: plugin version / 'post_title' => sprintf( __( 'Plugin Backup - %1$s - %2$s', 'easy-theme-and-plugin-upgrades' ), $data['name'], $data['version'] ), 'post_content' => '', ); $id = wp_insert_attachment( $attachment, $zip_path ); if ( ! is_wp_error( $id ) ) { wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $zip_path ) ); } return $zip_url; } private function get_random_characters( $min_length, $max_length ) { $characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; $rand_string = ''; $length = rand( $min_length, $max_length ); for ( $count = 0; $count < $length; $count++ ) { $rand_string .= $characters[ rand( 0, strlen( $characters ) - 1 ) ]; } return $rand_string; } function set_minimum_memory_limit( $new_memory_limit ) { $memory_limit = @ini_get( 'memory_limit' ); if ( $memory_limit > -1 ) { $unit = strtolower( substr( $memory_limit, -1 ) ); $new_unit = strtolower( substr( $new_memory_limit, -1 ) ); $memory_limit = intval( $memory_limit ); $new_memory_limit = intval( $new_memory_limit ); if ( 'm' == $unit ) { $memory_limit = 1048576; } elseif ( 'g' == $unit ) { $memory_limit = 1073741824; } elseif ( 'k' == $unit ) { $memory_limit = 1024; } if ( 'm' == $new_unit ) { $new_memory_limit = 1048576; } else if ( 'g' == $new_unit ) { $new_memory_limit = 1073741824; } else if ( 'k' == $new_unit ) { $new_memory_limit *= 1024; } if ( (int) $memory_limit < (int) $new_memory_limit ) { @ini_set( 'memory_limit', $new_memory_limit ); } } } }

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