SimpleCache.php

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<?php
namespace Elgg\Cache;
 
class SimpleCache {
    
    private $CONFIG;
 
    public function __construct() {
        global $CONFIG;
        $this->CONFIG = $CONFIG;
    }
 
    function registerView($view_name) {
        elgg_register_external_view($view_name, true);
    }
    
    function getUrl($type, $view) {
        // handle file type passed with view name
        if (($type === 'js' || $type === 'css') && 0 === strpos($view, $type . '/')) {
            $view = substr($view, strlen($type) + 1);
        }
    
        elgg_register_simplecache_view("$type/$view");
        return _elgg_get_simplecache_root() . "$type/$view";
    }
    
    
    function getRoot() {
        $viewtype = elgg_get_viewtype();
        if (elgg_is_simplecache_enabled()) {
            // stored in datalist as 'simplecache_lastupdate'
            $lastcache = (int)_elgg_services()->config->get('lastcache');
        } else {
            $lastcache = 0;
        }
    
        return elgg_normalize_url("/cache/$lastcache/$viewtype/");
    }
    
    function isEnabled() {
        return (bool) _elgg_services()->config->get('simplecache_enabled');
    }
    
    function enable() {
        _elgg_services()->datalist->set('simplecache_enabled', 1);
        _elgg_services()->config->set('simplecache_enabled', 1);
        elgg_invalidate_simplecache();
    }
    
    function disable() {
        if (_elgg_services()->config->get('simplecache_enabled')) {
            _elgg_services()->datalist->set('simplecache_enabled', 0);
            _elgg_services()->config->set('simplecache_enabled', 0);
    
            // purge simple cache
            _elgg_rmdir(_elgg_services()->config->getDataPath() . "views_simplecache");
        }
    }
    
    function invalidate() {
        
    
        if (!isset($this->CONFIG->views->simplecache) || !is_array($this->CONFIG->views->simplecache)) {
            return false;
        }
    
        _elgg_rmdir("{$this->CONFIG->dataroot}views_simplecache");
        mkdir("{$this->CONFIG->dataroot}views_simplecache");
    
        $time = time();
        _elgg_services()->datalist->set("simplecache_lastupdate", $time);
        $this->CONFIG->lastcache = $time;
    
        return true;
    }
 
    function init() {
        
 
        if (!defined('UPGRADING') && empty($this->CONFIG->lastcache)) {
            $this->CONFIG->lastcache = (int)_elgg_services()->datalist->get('simplecache_lastupdate');
        }
    }   
}