SystemCache.php

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<?php
namespace Elgg\Cache;

use Elgg\Cacheable;
use Elgg\Config;
use Elgg\Profilable;
use ElggCache;

class SystemCache {

    use Profilable;
    use Cacheable;

    private $config;

    public function __construct(ElggCache $cache, Config $config) {
        $this->cache = $cache;
        $this->config = $config;
    }

    public function reset() {
        $this->cache->clear();
    }
    
    public function save($type, $data) {
        if ($this->isEnabled()) {
            return $this->cache->save($type, $data);
        }

        return false;
    }
    
    public function load($type) {
        if (!$this->isEnabled()) {
            return;
        }
        
        $cached_data = $this->cache->load($type);
        if (isset($cached_data)) {
            return $cached_data;
        }
    }
    
    public function delete($type) {
        return $this->cache->delete($type);
    }
    
    public function isEnabled() {
        return (bool) $this->config->system_cache_enabled;
    }
    
    public function enable() {
        $this->config->save('system_cache_enabled', 1);
        $this->reset();
    }
    
    public function disable() {
        $this->config->save('system_cache_enabled', 0);
        $this->reset();
    }
    
    public function init() {
        if (!$this->isEnabled()) {
            return;
        }

        // cache system data if enabled and not loaded
        if (!$this->config->system_cache_loaded) {
            _elgg_services()->views->cacheConfiguration($this);
        }
    }
}