SystemCache.php

Go to the documentation of this file.

<?php
namespace Elgg\Cache;

class SystemCache {
    private $CONFIG;

    public function __construct() {
        global $CONFIG;
        $this->CONFIG = $CONFIG;
    }

    function getFileCache() {
        
    
        static $FILE_PATH_CACHE;
    
        if (!$FILE_PATH_CACHE) {
            $FILE_PATH_CACHE = new \ElggFileCache($this->CONFIG->dataroot . 'system_cache/');
        }
    
        return $FILE_PATH_CACHE;
    }
    
    function reset() {
        $this->getFileCache()->clear();
    }
    
    function save($type, $data) {
        
    
        if ($this->CONFIG->system_cache_enabled) {
            return $this->getFileCache()->save($type, $data);
        }
    
        return false;
    }
    
    function load($type) {
        
    
        if ($this->CONFIG->system_cache_enabled) {
            $cached_data = $this->getFileCache()->load($type);
    
            if ($cached_data) {
                return $cached_data;
            }
        }
    
        return null;
    }
    
    function enable() {
        
    
        _elgg_services()->datalist->set('system_cache_enabled', 1);
        $this->CONFIG->system_cache_enabled = 1;
        $this->reset();
    }
    
    function disable() {
        
    
        _elgg_services()->datalist->set('system_cache_enabled', 0);
        $this->CONFIG->system_cache_enabled = 0;
        $this->reset();
    }
    
    function loadAll() {
        
    
        $this->CONFIG->system_cache_loaded = false;
    
        $this->CONFIG->views = new \stdClass();
        $data = $this->load('view_locations');
        if (!is_string($data)) {
            return;
        }
        $this->CONFIG->views->locations = unserialize($data);
        
        $data = $this->load('view_types');
        if (!is_string($data)) {
            return;
        }
        $this->CONFIG->view_types = unserialize($data);

        // Note: We don't need view_overrides for operation. Inspector can pull this from the cache
    
        $this->CONFIG->system_cache_loaded = true;
    }
    
    function init() {
        if (!$this->CONFIG->system_cache_enabled) {
            return;
        }

        // cache system data if enabled and not loaded
        if (!$this->CONFIG->system_cache_loaded) {
            $this->save('view_locations', serialize($this->CONFIG->views->locations));
            $this->save('view_types', serialize($this->CONFIG->view_types));

            // this is saved just for the inspector and is not loaded in loadAll()
            $this->save('view_overrides', serialize(_elgg_services()->views->getOverriddenLocations()));
        }
    
        if (!$this->CONFIG->i18n_loaded_from_cache) {
            _elgg_services()->translator->reloadAllTranslations();
            foreach ($this->CONFIG->translations as $lang => $map) {
                $this->save("$lang.lang", serialize($map));
            }
        }
    }
}