<?php
namespace W3TC;

/**
 * The W3 Total Cache plugin
 *
 * @package wp-cli
 * @subpackage commands/third-party
 */
class W3TotalCache_Command extends \WP_CLI_Command {

	/**
	 * Clear something from the cache
	 *
	 * @param array   $args
	 * @param array   $vars
	 */
	function flush( $args = array(), $vars = array() ) {
		$args = array_unique( $args );

		do {
			$cache_type = array_shift( $args );

			switch ( $cache_type ) {
			case 'db':
			case 'database':
				try {
					$w3_db = Dispatcher::component( 'CacheFlush' );
					$w3_db->dbcache_flush();
				}
				catch ( \Exception $e ) {
					\WP_CLI::error( __( 'Flushing the DB cache failed.', 'w3-total-cache' ) );
				}
				\WP_CLI::success( __( 'The DB cache is flushed successfully.', 'w3-total-cache' ) );
				break;

			case 'minify':
				try {
					$w3_minify = Dispatcher::component( 'CacheFlush' );
					$w3_minify->minifycache_flush();
				}
				catch ( \Exception $e ) {
					\WP_CLI::error( __( 'Flushing the minify cache failed.', 'w3-total-cache' ) );
				}
				\WP_CLI::success( __( 'The minify cache is flushed successfully.', 'w3-total-cache' ) );
				break;

			case 'object':
				try {
					$w3_objectcache = Dispatcher::component( 'CacheFlush' );
					$w3_objectcache->objectcache_flush();
				}
				catch ( \Exception $e ) {
					\WP_CLI::error( __( 'Flushing the object cache failed.', 'w3-total-cache' ) );
				}
				\WP_CLI::success( __( 'The object cache is flushed successfully.', 'w3-total-cache' ) );
				break;

			case 'post':
			default:
				if ( isset( $vars['post_id'] ) ) {
					if ( is_numeric( $vars['post_id'] ) ) {
						try {
							$w3_cacheflush = Dispatcher::component( 'CacheFlush' );
							$w3_cacheflush->flush_post( $vars['post_id'] );
						}
						catch ( \Exception $e ) {
							\WP_CLI::error( __( 'Flushing the page from cache failed.', 'w3-total-cache' ) );
						}
						\WP_CLI::success( __( 'The page is flushed from cache successfully.', 'w3-total-cache' ) );
					} else {
						\WP_CLI::error( __( 'This is not a valid post id.', 'w3-total-cache' ) );
					}

					w3tc_flush_post( $vars['post_id'] );
				}
				elseif ( isset( $vars['permalink'] ) ) {
					$id = url_to_postid( $vars['permalink'] );

					if ( is_numeric( $id ) ) {
						try {
							$w3_cacheflush = Dispatcher::component( 'CacheFlush' );
							$w3_cacheflush->flush_post( $id );
						}
						catch ( \Exception $e ) {
							\WP_CLI::error( __( 'Flushing the page from cache failed.', 'w3-total-cache' ) );
						}
						\WP_CLI::success( __( 'The page is flushed from cache successfully.', 'w3-total-cache' ) );
					} else {
						\WP_CLI::error( __( 'There is no post with this permalink.', 'w3-total-cache' ) );
					}
				} else {
					if ( isset( $flushed_page_cache ) && $flushed_page_cache )
						break;

					$flushed_page_cache = true;
					try {
						$w3_cacheflush = Dispatcher::component( 'CacheFlush' );
						$w3_cacheflush->flush_posts();
					}
					catch ( \Exception $e ) {
						\WP_CLI::error( __( 'Flushing the page cache failed.', 'w3-total-cache' ) );
					}
					\WP_CLI::success( __( 'The page cache is flushed successfully.', 'w3-total-cache' ) );
				}
			}
		} while ( !empty( $args ) );
	}


	/**
	 * Update query string function
	 */
	function querystring() {

		try {
			$w3_querystring = Dispatcher::component( 'CacheFlush' );
			$w3_querystring->browsercache_flush();
		}
		catch ( \Exception $e ) {
			\WP_CLI::error( sprintf(
					__( 'updating the query string failed. with error %s', 'w3-total-cache' ),
					$e ) );
		}

		\WP_CLI::success( __( 'The query string was updated successfully.', 'w3-total-cache' ) );

	}

	/**
	 * Purge URL's from cdn and varnish if enabled
	 *
	 * @param array   $args
	 */
	function cdn_purge( $args = array() ) {
		$purgeitems = array();
		foreach ( $args as $file ) {
			$cdncommon = Dispatcher::component( 'Cdn_Core' );
			$local_path = WP_ROOT . $file;
			$remote_path = $file;
			$purgeitems[] = $cdncommon->build_file_descriptor( $local_path, $remote_path );
		}

		try {
			$w3_cdn_purge = Dispatcher::component( 'CacheFlush' );
			$w3_cdn_purge->cdn_purge_files( $purgeitems );
		}
		catch ( \Exception $e ) {
			\WP_CLI::error( __( 'Files did not successfully purge with error %s', 'w3-total-cache' ), $e );
		}
		\WP_CLI::success( __( 'Files purged successfully.', 'w3-total-cache' ) );

	}

	/**
	 * Tell opcache to reload PHP files
	 *
	 * @param array   $args
	 */
	function opcache_flush_file( $args = array() ) {
		try {
			$method = array_shift( $args );
			if ( !in_array( $method, array( 'SNS', 'local' ) ) )
				\WP_CLI::error( $method . __( ' is not supported. Change to SNS or local to reload opcache files', 'w3-total-cache' ) );
			if ( $method == 'SNS' ) {
				$w3_cache = Dispatcher::component( 'CacheFlush' );
				$w3_cache->opcache_flush_file( $args[0] );
			} else {
				$url = WP_PLUGIN_URL . '/' . dirname( W3TC_FILE ) . '/pub/opcache.php';
				$path = parse_url( $url, PHP_URL_PATH );
				$post = array(
					'method' => 'POST',
					'timeout' => 45,
					'redirection' => 5,
					'httpversion' => '1.0',
					'blocking' => true,
					'body' => array(
						'nonce' => wp_hash( $path ),
						'command' => 'flush_file',
						'file' => $args[0]
					),
				);
				$result = wp_remote_post( $url, $post );
				if ( is_wp_error( $result ) ) {
					\WP_CLI::error( __( 'Files did not successfully reload with error %s', 'w3-total-cache' ), $result );
				} elseif ( $result['response']['code'] != '200' ) {
					\WP_CLI::error( __( 'Files did not successfully reload with message: ', 'w3-total-cache' ) . $result['body'] );
				}
			}
		}
		catch ( \Exception $e ) {
			\WP_CLI::error( __( 'Files did not successfully reload with error %s', 'w3-total-cache' ), $e );
		}
		\WP_CLI::success( __( 'Files reloaded successfully.', 'w3-total-cache' ) );

	}

	/**
	 * Tell opcache to reload PHP files
	 *
	 * @param array   $args
	 */
	function opcache_flush( $args = array() ) {
		try {
			$method = array_shift( $args );
			if ( !in_array( $method, array( 'SNS', 'local' ) ) )
				\WP_CLI::error( $method . __( ' is not supported. Change to SNS or local to delete opcache files', 'w3-total-cache' ) );

			if ( $method == 'SNS' ) {
				$w3_cache = Dispatcher::component( 'CacheFlush' );
				$w3_cache->opcache_flush();
			} else {
				$url = WP_PLUGIN_URL . '/' . dirname( W3TC_FILE ) . '/pub/opcache.php';
				$path = parse_url( $url, PHP_URL_PATH );
				$post = array(
					'method' => 'POST',
					'timeout' => 45,
					'redirection' => 5,
					'httpversion' => '1.0',
					'blocking' => true,
					'body' => array(
						'nonce' => wp_hash( $path ),
						'command' => 'flush'
					),
				);
				$result = wp_remote_post( $url, $post );
				if ( is_wp_error( $result ) ) {
					\WP_CLI::error( __( 'Files did not successfully delete with error %s', 'w3-total-cache' ), $result );
				} elseif ( $result['response']['code'] != '200' ) {
					\WP_CLI::error( __( 'Files did not successfully delete with message: ', 'w3-total-cache' ). $result['body'] );
				}
			}
		}
		catch ( \Exception $e ) {
			\WP_CLI::error( __( 'Files did not successfully delete with error %s', 'w3-total-cache' ), $e );
		}
		\WP_CLI::success( __( 'Files deleted successfully.', 'w3-total-cache' ) );

	}

	/**
	 * triggers PgCache Garbage Cleanup
	 */
	function pgcache_cleanup() {
		try {
			$pgcache_cleanup = Dispatcher::component( 'PgCache_Plugin_Admin' );
			$pgcache_cleanup->cleanup();
		} catch ( \Exception $e ) {
			\WP_CLI::error( __( 'PageCache Garbage cleanup did not start with error %s',
					'w3-total-cache' ), $e );
		}

		\WP_CLI::success( __( 'PageCache Garbage cleanup triggered successfully.',
				'w3-total-cache' ) );
	}

	/**
	 * triggers PgCache Garbage Cleanup
	 */
	function fix_environment( $args = array(), $vars = array() ) {
		$server_type = array_shift( $args );
		switch ( $server_type ) {
		case 'apache':
			$_SERVER['SERVER_SOFTWARE'] = 'Apache';
			break;
		case 'nginx':
			$_SERVER['SERVER_SOFTWARE'] = 'nginx';
			break;
		}

		try {
			$config = Dispatcher::config();
			$environment = Dispatcher::component( 'Root_Environment' );
			$environment->fix_in_wpadmin( $config, true );
		} catch ( Util_Environment_Exceptions $e ) {
			\WP_CLI::error( __( 'Environment adjustment failed with error', 'w3-total-cache' ),
				$e->getCombinedMessage() );
		}

		\WP_CLI::success( __( 'Environment adjusted.', 'w3-total-cache' ) );
	}

	/**
	 * Help function for this command
	 */
	public static function help() {
		\WP_CLI::line( <<<EOB
usage: wp w3-total-cache flush [post|database|minify|object] [--post_id=<post-id>] [--permalink=<post-permalink>]
  or : wp w3-total-cache querystring
  or : wp w3-total-cache cdn_purge <file> [<file2>]...
  or : wp w3-total-cache pgcache_cleanup

			 flush    			   flushes whole cache or specific items based on provided arguments
			 querystring			 update query string for all static files
			 cdn_purge         Purges command line provided files from Varnish and the CDN
			 pgcache_cleanup   Generally triggered from a cronjob, allows for manual Garbage collection of page cache to be triggered
             opcache_flush_file SNS/local file.php Tells opcache to compile files
             opcache_flush SNS/local expression Tells opcache to delete all files
       fix_environment   Creates missing files, writes apache/nginx rules. Subcommand defines server type:
             apache      create rules for apache server
             nginx      create rules for nginx server
Available flush sub-commands:
			 --post_id=<id>                  flush a specific post ID
			 --permalink=<post-permalink>    flush a specific permalink
			 database                        flush the database cache
			 object                          flush the object cache
			 minify                          flush the minify cache
EOB
		);
	}
}

if ( method_exists( '\WP_CLI', 'add_command' ) ) {
	\WP_CLI::add_command( 'w3-total-cache', '\W3TC\W3TotalCache_Command' );
	\WP_CLI::add_command( 'total-cache', '\W3TC\W3TotalCache_Command' );
} else {
	// backward compatibility
	\WP_CLI::addCommand( 'w3-total-cache', '\W3TC\W3TotalCache_Command' );
	\WP_CLI::addCommand( 'total-cache', '\W3TC\W3TotalCache_Command' );
}