267 lines
6.7 KiB
PHP
267 lines
6.7 KiB
PHP
<?php
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namespace W3TC;
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/**
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* Interplugin communication
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*/
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class Dispatcher {
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static private $instances = array();
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/**
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* return component instance
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*/
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static public function component( $class ) {
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if ( !isset( self::$instances[$class] ) ) {
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$full_class = '\\W3TC\\' . $class;
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self::$instances[$class] = new $full_class();
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}
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$v = self::$instances[$class]; // Don't return reference
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return $v;
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}
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static public function config() {
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return self::component( 'Config' );
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}
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static public function reset_config() {
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unset(self::$instances['Config']);
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}
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static public function config_master() {
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static $config_master = null;
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if ( is_null( $config_master ) ) {
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$config_master = new Config( 0 );
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}
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return $config_master;
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}
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static public function config_state() {
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if ( Util_Environment::blog_id() <= 0 )
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return self::config_state_master();
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static $config_state = null;
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if ( is_null( $config_state ) )
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$config_state = new ConfigState( false );
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return $config_state;
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}
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static public function config_state_master() {
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static $config_state = null;
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if ( is_null( $config_state ) )
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$config_state = new ConfigState( true );
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return $config_state;
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}
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static public function config_state_note() {
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static $o = null;
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if ( is_null( $o ) )
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$o = new ConfigStateNote( self::config_state_master(),
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self::config_state() );
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return $o;
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}
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/**
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* Checks if specific local url is uploaded to CDN
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*
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* @param string $url
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* @return bool
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*/
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static public function is_url_cdn_uploaded( $url ) {
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$minify_enabled = self::config()->get_boolean( 'minify.enabled' );
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if ( $minify_enabled ) {
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$minify = Dispatcher::component( 'Minify_MinifiedFileRequestHandler' );
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$data = $minify->get_url_custom_data( $url );
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if ( is_array( $data ) && isset( $data['cdn.status'] ) && $data['cdn.status'] == 'uploaded' ) {
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return true;
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}
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}
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// supported only for minify-based urls, futher is not needed now
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return false;
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}
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/**
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* Creates file for CDN upload.
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* Needed because minify can handle urls of non-existing files but CDN needs
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* real file to upload it
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*/
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static public function create_file_for_cdn( $filename ) {
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$minify_enabled = self::config()->get_boolean( 'minify.enabled' );
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if ( $minify_enabled ) {
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$minify_document_root = Util_Environment::cache_blog_dir( 'minify' ) . '/';
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if ( !substr( $filename, 0, strlen( $minify_document_root ) ) == $minify_document_root ) {
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// unexpected file name
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return;
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}
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$short_filename = substr( $filename, strlen( $minify_document_root ) );
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$minify = Dispatcher::component( 'Minify_MinifiedFileRequestHandler' );
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$data = $minify->process( $short_filename, true );
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if ( !file_exists( $filename ) && isset( $data['content'] ) ) {
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if ( !file_exists( dirname( $filename ) ) )
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Util_File::mkdir_from_safe( dirname( $filename ), W3TC_CACHE_DIR );
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}
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@file_put_contents( $filename, $data['content'] );
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}
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}
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/**
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* Called on successful file upload to CDN
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*
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* @param unknown $file_name
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*/
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static public function on_cdn_file_upload( $file_name ) {
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$minify_enabled = self::config()->get_boolean( 'minify.enabled' );
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if ( $minify_enabled ) {
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$minify_document_root = Util_Environment::cache_blog_dir( 'minify' ) . '/';
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if ( !substr( $file_name, 0, strlen( $minify_document_root ) ) == $minify_document_root ) {
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// unexpected file name
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return;
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}
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$short_file_name = substr( $file_name, strlen( $minify_document_root ) );
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$minify = Dispatcher::component( 'Minify_MinifiedFileRequestHandler' );
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$minify->set_file_custom_data( $short_file_name,
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array( 'cdn.status' => 'uploaded' ) );
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}
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}
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/**
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* Returns common rules used by nginx for files belonging to browsercache
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* section
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* TODO: change to filters, like litespeed does
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*/
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static public function nginx_rules_for_browsercache_section( $config, $section,
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$extra_add_headers_set = false ) {
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$rules = array(
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'other' => array(),
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'add_header' => array()
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);
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if ( $config->get_boolean( 'browsercache.enabled' ) ) {
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$o = new BrowserCache_Environment_Nginx( $config );
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$rules = $o->section_rules( $section, $extra_add_headers_set );
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}
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if ( !empty( $rules['add_header'] ) &&
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$config->get_boolean( 'cdn.enabled' ) ) {
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$o = new Cdn_Environment_Nginx( $config );
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$rule = $o->generate_canonical();
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if ( !empty( $rule ) ) {
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$rules['add_header'][] = $rule;
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}
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}
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return array_merge( $rules['other'], $rules['add_header'] );
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}
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/**
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* Called when minify going to process request of some minified file
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*/
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static public function requested_minify_filename( $config, $file ) {
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// browsercache may alter filestructure, allow it to remove its
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// uniqualizator
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if ( $config->get_boolean( 'browsercache.enabled' ) &&
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$config->get_boolean( 'browsercache.rewrite' ) ) {
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if ( preg_match( '~(.+)\.([0-9a-z]+)(\.[^.]+)$~', $file, $m ) )
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$file = $m[1] . $m[3];
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}
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return $file;
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}
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/**
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* Usage statistics uses one of other module's cache
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* to store its temporary data
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*/
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static public function get_usage_statistics_cache() {
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static $cache = null;
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if ( is_null( $cache ) ) {
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$c = Dispatcher::config();
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$engineConfig = null;
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if ( $c->get_boolean( 'objectcache.enabled' ) ) {
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$provider = Dispatcher::component( 'ObjectCache_WpObjectCache_Regular' );
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} else if ( $c->get_boolean( 'dbcache.enabled' ) ) {
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$provider = Dispatcher::component( 'DbCache_Core' );
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} else if ( $c->get_boolean( 'pgcache.enabled' ) ) {
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$provider = Dispatcher::component( 'PgCache_ContentGrabber' );
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} else if ( $c->get_boolean( 'minify.enabled' ) ) {
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$provider = Dispatcher::component( 'Minify_Core' );
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} else {
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$engineConfig = array( 'engine' => 'file' );
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}
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if ( is_null( $engineConfig ) ) {
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$engineConfig = $provider->get_usage_statistics_cache_config();
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}
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$engineConfig['module'] = 'stats';
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$engineConfig['blog_id'] = 0; // count wpmu-wide stats
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if ( $engineConfig['engine'] == 'file' ) {
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$engineConfig['cache_dir'] = Util_Environment::cache_dir( 'stats' );
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}
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$cache = Cache::instance( $engineConfig['engine'],
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$engineConfig );
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}
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return $cache;
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}
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/**
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* In a case request processing has been finished before WP initialized,
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* but usage statistics metrics should be counted.
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* To work properly $metrics_function has to be added also by plugin
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* when add_action is available.
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*/
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static public function usage_statistics_apply_before_init_and_exit(
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$metrics_function ) {
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$c = Dispatcher::config();
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if ( !$c->get_boolean( 'stats.enabled' ) ) {
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exit();
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}
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$core = Dispatcher::component( 'UsageStatistics_Core' );
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$core->apply_metrics_before_init_and_exit( $metrics_function );
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}
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}
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