<?php
class CacheEflore {

	private $service;
	private $config;
	private $dureecache = 0;
	private $projetNom;
	private $serviceNom;
	private $cache;
	private $cacheActif;

	public function __construct($service, $projetNom, $serviceNom, $cacheActif) {
		$this->cacheActif = $cacheActif;
		$this->service = $service;
		$this->chargerDureeCache();
		$this->projetNom = $projetNom;
		$this->serviceNom = $serviceNom;
		$this->cache = new CacheSimple(array(
			"mise_en_cache" => true, 
			"stockage_chemin" => Config::get('chemin_cache').'services'.DS, 
			"duree_de_vie" => $this->dureecache));
	}

	public function chargerDureeCache() {
		if ($this->cacheActif == "1") {
			$this->dureecache = Commun::getDureeCache();
		}
	}

	public function consulter() {
		list($ressources, $parametres) = func_get_args();
		$args = func_get_args(); // XXX: PHP-5.3
		$id = $this->genererID($ressources, $parametres);
		$retour = unserialize($this->cache->charger($id));
		if ($retour == false) {
			$retour = call_user_func_array(array($this, 'mettreEnCache'),
										   $args);
		}

		return $retour;
	}

	public function mettreEnCache() {
		list($ressources, $parametres) = func_get_args();
		$args = func_get_args(); // XXX: PHP-5.3
		$retour = call_user_func_array(array($this->service, 'consulter'),
									   $args);
		$id = $this->genererID($ressources, $parametres);
		if ($this->dureecache > 0) {
			$this->cache->sauver(serialize($retour), $id);
		}
		return $retour;
	}

	public function genererID($ressources, $parametres) {
		$chaineRessources = "";
		$chaineParametres = "";
		if (count($ressources) > 0) {
			foreach ($ressources as $key => $val) {
				$chaineRessources .= "$key:$val;";
			}
		}

		if (count($parametres) > 0) {
			foreach ($parametres as $key => $val) {
				$chaineParametres .= "$key:$val;";
			}
		}

		$chaineMD5 = $this->projetNom.'/'.$this->serviceNom.'/'.md5($chaineRessources.$chaineParametres);
		return $chaineMD5;
	}
}
?>