<?php

/**

 * A File upgrader class for WordPress.

 *

 * This set of classes are designed to be used to upgrade/install a local set of files on the filesystem via the Filesystem Abstraction classes.

 *

 * @link http://trac.wordpress.org/ticket/7875 consolidate plugin/theme/core upgrade/install functions

 *

 * @package WordPress

 * @subpackage Upgrader

 * @since 2.8.0

 */

/**

 * WordPress Upgrader class for Upgrading/Installing a local set of files via the Filesystem Abstraction classes from a Zip file.

 *

 * @TODO More Detailed docs, for methods as well.

 *

 * @package WordPress

 * @subpackage Upgrader

 * @since 2.8.0

 */

class WP_Upgrader {

	var $strings = array();

	var $skin = null;

	var $result = array();

	function WP_Upgrader($skin = null) {

		return $this->__construct($skin);

	}

	function __construct($skin = null) {

		if ( null == $skin )

			$this->skin = new WP_Upgrader_Skin();

		else

			$this->skin = $skin;

	}

	function init() {

		$this->skin->set_upgrader($this);

		$this->generic_strings();

	}

	function generic_strings() {

		$this->strings['bad_request'] = __('Invalid Data provided.');

		$this->strings['fs_unavailable'] = __('Could not access filesystem.');

		$this->strings['fs_error'] = __('Filesystem error');

		$this->strings['fs_no_root_dir'] = __('Unable to locate WordPress Root directory.');

		$this->strings['fs_no_content_dir'] = __('Unable to locate WordPress Content directory (wp-content).');

		$this->strings['fs_no_plugins_dir'] = __('Unable to locate WordPress Plugin directory.');

		$this->strings['fs_no_themes_dir'] = __('Unable to locate WordPress Theme directory.');

		$this->strings['fs_no_folder'] = __('Unable to locate needed folder (%s).');

		$this->strings['download_failed'] = __('Download failed.');

		$this->strings['installing_package'] = __('Installing the latest version.');

		$this->strings['folder_exists'] = __('Destination folder already exists.');

		$this->strings['mkdir_failed'] = __('Could not create directory.');

		$this->strings['bad_package'] = __('Incompatible Archive');

		$this->strings['maintenance_start'] = __('Enabling Maintenance mode.');

		$this->strings['maintenance_end'] = __('Disabling Maintenance mode.');

	}

	function fs_connect( $directories = array() ) {

		global $wp_filesystem;

		if ( false === ($credentials = $this->skin->request_filesystem_credentials()) )

			return false;

		if ( ! WP_Filesystem($credentials) ) {

			$error = true;

			if ( is_object($wp_filesystem) && $wp_filesystem->errors->get_error_code() )

				$error = $wp_filesystem->errors;

			$this->skin->request_filesystem_credentials($error); //Failed to connect, Error and request again

			return false;

		}

		if ( ! is_object($wp_filesystem) )

			return new WP_Error('fs_unavailable', $this->strings['fs_unavailable'] );

		if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() )

			return new WP_Error('fs_error', $this->strings['fs_error'], $wp_filesystem->errors);

		foreach ( (array)$directories as $dir ) {

			if ( ABSPATH == $dir && ! $wp_filesystem->abspath() )

				return new WP_Error('fs_no_root_dir', $this->strings['fs_no_root_dir']);

			elseif ( WP_CONTENT_DIR == $dir && ! $wp_filesystem->wp_content_dir() )

				return new WP_Error('fs_no_content_dir', $this->strings['fs_no_content_dir']);

			elseif ( WP_PLUGIN_DIR == $dir && ! $wp_filesystem->wp_plugins_dir() )

				return new WP_Error('fs_no_plugins_dir', $this->strings['fs_no_plugins_dir']);

			elseif ( WP_CONTENT_DIR . '/themes' == $dir && ! $wp_filesystem->find_folder(WP_CONTENT_DIR . '/themes') )

				return new WP_Error('fs_no_themes_dir', $this->strings['fs_no_themes_dir']);

			elseif ( ! $wp_filesystem->find_folder($dir) )

				return new WP_Error('fs_no_folder', sprintf($strings['fs_no_folder'], $dir));

		}

		return true;

	} //end fs_connect();

	function download_package($package) {

		if ( ! preg_match('!^(http|https|ftp)://!i', $package) && file_exists($package) ) //Local file or remote?

			return $package; //must be a local file..

		if ( empty($package) )

			return new WP_Error('no_package', $this->strings['no_package']);

		$this->skin->feedback('downloading_package', $package);

		$download_file = download_url($package);

		if ( is_wp_error($download_file) )

			return new WP_Error('download_failed', $this->strings['download_failed'], $download_file->get_error_message());

		return $download_file;

	}

	function unpack_package($package, $delete_package = true) {

		global $wp_filesystem;

		$this->skin->feedback('unpack_package');

		$upgrade_folder = $wp_filesystem->wp_content_dir() . 'upgrade/';

		//Clean up contents of upgrade directory beforehand.

		$upgrade_files = $wp_filesystem->dirlist($upgrade_folder);

		if ( !empty($upgrade_files) ) {

			foreach ( $upgrade_files as $file )

				$wp_filesystem->delete($upgrade_folder . $file['name'], true);

		}

		//We need a working directory

		$working_dir = $upgrade_folder . basename($package, '.zip');

		// Clean up working directory

		if ( $wp_filesystem->is_dir($working_dir) )

			$wp_filesystem->delete($working_dir, true);

		// Unzip package to working directory

		$result = unzip_file($package, $working_dir); //TODO optimizations, Copy when Move/Rename would suffice?

		// Once extracted, delete the package if required.

		if ( $delete_package )

			unlink($package);

		if ( is_wp_error($result) ) {

			$wp_filesystem->delete($working_dir, true);

			return $result;

		}

		return $working_dir;

	}

	function install_package($args = array()) {

		global $wp_filesystem;

		$defaults = array( 'source' => '', 'destination' => '', //Please always pass these

						'clear_destination' => false, 'clear_working' => false,

						'hook_extra' => array());

		$args = wp_parse_args($args, $defaults);

		extract($args);

		@set_time_limit( 300 );

		if ( empty($source) || empty($destination) )

			return new WP_Error('bad_request', $this->strings['bad_request']);

		$this->skin->feedback('installing_package');

		$res = apply_filters('upgrader_pre_install', true, $hook_extra);

		if ( is_wp_error($res) )

			return $res;

		//Retain the Original source and destinations

		$remote_source = $source;

		$local_destination = $destination;

		$source_files = array_keys( $wp_filesystem->dirlist($remote_source) );

		$remote_destination = $wp_filesystem->find_folder($local_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) && $wp_filesystem->is_dir( trailingslashit($source) . $source_files[0] . '/') ) //Only one folder? Then we want its contents.

			$source = trailingslashit($source) . trailingslashit($source_files[0]);

		elseif ( count($source_files) == 0 )

			return new WP_Error('bad_package', $this->strings['bad_package']); //There are no files?

		//else //Its only a single file, The upgrader will use the foldername of this file as the destination folder. foldername is based on zip filename.

		//Hook ability to change the source file location..

		$source = apply_filters('upgrader_source_selection', $source, $remote_source, $this);

		if ( is_wp_error($source) )

			return $source;

		//Has the source location changed? If so, we need a new source_files list.

		if ( $source !== $remote_source )

			$source_files = array_keys( $wp_filesystem->dirlist($source) );

		//Protection against deleting files in any important base directories.

		if ( in_array( $destination, array(ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes') ) ) {

			$remote_destination = trailingslashit($remote_destination) . trailingslashit(basename($source));

			$destination = trailingslashit($destination) . trailingslashit(basename($source));

		}

		//If we're not clearing the destination folder, and something exists there allready, Bail.

		if ( ! $clear_destination && $wp_filesystem->exists($remote_destination) ) {

			$wp_filesystem->delete($remote_source, true); //Clear out the source files.

			return new WP_Error('folder_exists', $this->strings['folder_exists'], $remote_destination );

		} else if ( $clear_destination ) {

			//We're going to clear the destination if theres something there

			$this->skin->feedback('remove_old');

			$removed = true;

			if ( $wp_filesystem->exists($remote_destination) )

				$removed = $wp_filesystem->delete($remote_destination, true);

			$removed = apply_filters('upgrader_clear_destination', $removed, $local_destination, $remote_destination, $hook_extra);

			if ( is_wp_error($removed) )

				return $removed;

			else if ( ! $removed )

				return new WP_Error('remove_old_failed', $this->strings['remove_old_failed']);

		}

		//Create destination if needed

		if ( !$wp_filesystem->exists($remote_destination) )

			if ( !$wp_filesystem->mkdir($remote_destination, FS_CHMOD_DIR) )

				return new WP_Error('mkdir_failed', $this->strings['mkdir_failed'], $remote_destination);

		// Copy new version of item into place.

		$result = copy_dir($source, $remote_destination);

		if ( is_wp_error($result) ) {

			if ( $clear_working )

				$wp_filesystem->delete($remote_source, true);

			return $result;

		}

		//Clear the Working folder?

		if ( $clear_working )

			$wp_filesystem->delete($remote_source, true);

		$destination_name = basename( str_replace($local_destination, '', $destination) );

		if ( '.' == $destination_name )

			$destination_name = '';

		$this->result = compact('local_source', 'source', 'source_name', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination', 'delete_source_dir');

		$res = apply_filters('upgrader_post_install', true, $hook_extra, $this->result);

		if ( is_wp_error($res) ) {

			$this->result = $res;

			return $res;

		}

		//Bombard the calling function will all the info which we've just used.

		return $this->result;

	}

	function run($options) {

		$defaults = array( 	'package' => '', //Please always pass this.

							'destination' => '', //And this

							'clear_destination' => false,

							'clear_working' => true,

							'hook_extra' => array() //Pass any extra $hook_extra args here, this will be passed to any hooked filters.

						);

		$options = wp_parse_args($options, $defaults);

		extract($options);

		//Connect to the Filesystem first.

		$res = $this->fs_connect( array(WP_CONTENT_DIR, $destination) );

		if ( ! $res ) //Mainly for non-connected filesystem.

			return false;

		if ( is_wp_error($res) ) {

			$this->skin->error($res);

			return $res;

		}

		$this->skin->header();

		$this->skin->before();

		//Download the package (Note, This just returns the filename of the file if the package is a local file)

		$download = $this->download_package( $package );

		if ( is_wp_error($download) ) {

			$this->skin->error($download);

			return $download;

		}

		//Unzip's the file into a temporary directory

		$working_dir = $this->unpack_package( $download );

		if ( is_wp_error($working_dir) ) {

			$this->skin->error($working_dir);

			return $working_dir;

		}

		//With the given options, this installs it to the destination directory.

		$result = $this->install_package( array(

											'source' => $working_dir,

											'destination' => $destination,

											'clear_destination' => $clear_destination,

											'clear_working' => $clear_working,

											'hook_extra' => $hook_extra

										) );

		$this->skin->set_result($result);

		if ( is_wp_error($result) ) {

			$this->skin->error($result);

			$this->skin->feedback('process_failed');

		} else {

			//Install Suceeded

			$this->skin->feedback('process_success');

		}

		$this->skin->after();

		$this->skin->footer();

		return $result;

	}

	function maintenance_mode($enable = false) {

		global $wp_filesystem;

		$file = $wp_filesystem->abspath() . '.maintenance';

		if ( $enable ) {

			$this->skin->feedback('maintenance_start');

			// Create maintenance file to signal that we are upgrading

			$maintenance_string = '<?php $upgrading = ' . time() . '; ?>';

			$wp_filesystem->delete($file);

			$wp_filesystem->put_contents($file, $maintenance_string, FS_CHMOD_FILE);

		} else if ( !$enable && $wp_filesystem->exists($file) ) {

			$this->skin->feedback('maintenance_end');

			$wp_filesystem->delete($file);

		}

	}

}

/**

 * Plugin Upgrader class for WordPress Plugins, It is designed to upgrade/install plugins from a local zip, remote zip URL, or uploaded zip file.

 *

 * @TODO More Detailed docs, for methods as well.

 *

 * @package WordPress

 * @subpackage Upgrader

 * @since 2.8.0

 */

class Plugin_Upgrader extends WP_Upgrader {

	var $result;

	function upgrade_strings() {

		$this->strings['up_to_date'] = __('The plugin is at the latest version.');

		$this->strings['no_package'] = __('Upgrade package not available.');

		$this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>.');

		$this->strings['unpack_package'] = __('Unpacking the update.');

		$this->strings['deactivate_plugin'] = __('Deactivating the plugin.');

		$this->strings['remove_old'] = __('Removing the old version of the plugin.');

		$this->strings['remove_old_failed'] = __('Could not remove the old plugin.');

		$this->strings['process_failed'] = __('Plugin upgrade Failed.');

		$this->strings['process_success'] = __('Plugin upgraded successfully.');

	}

	function install_strings() {

		$this->strings['no_package'] = __('Install package not available.');

		$this->strings['downloading_package'] = __('Downloading install package from <span class="code">%s</span>.');

		$this->strings['unpack_package'] = __('Unpacking the package.');

		$this->strings['installing_package'] = __('Installing the plugin.');

		$this->strings['process_failed'] = __('Plugin Install Failed.');

		$this->strings['process_success'] = __('Plugin Installed successfully.');

	}

	function install($package) {

		$this->init();

		$this->install_strings();

		$this->run(array(

					'package' => $package,

					'destination' => WP_PLUGIN_DIR,

					'clear_destination' => false, //Do not overwrite files.

					'clear_working' => true,

					'hook_extra' => array()

					));

		// Force refresh of plugin update information

		delete_transient('update_plugins');

	}

	function upgrade($plugin) {

		$this->init();

		$this->upgrade_strings();

		$current = get_transient( 'update_plugins' );

		if ( !isset( $current->response[ $plugin ] ) ) {

			$this->skin->set_result(false);

			$this->skin->error('up_to_date');

			$this->skin->after();