<?php
class CacheMoissonnage {
	
	private $service;
	private $config;
	private $dureecache = 0;
	private $serviceNom;
	private $cache;
	private $cacheActif;
	
	public function __construct($service, $serviceNom, $cacheActif) {
		$this->cacheActif = $cacheActif;
		$this->service = $service;
		$this->chargerDureeCache();
		$this->serviceNom = $serviceNom;
		$this->cache = new CacheSimple(array(
			"mise_en_cache"   => true,
			"stockage_chemin" => Config::get("chemincache"),
			"duree_de_vie"    => $this->dureecache
		));
	}

	public function chargerDureeCache() {
		if ($this->cacheActif == "1") {
			$this->dureecache = $this->service->getDureeCache();
		}
	}
	
	public function consulter($ressources, $parametres) {
		$id = $this->genererID($ressources, $parametres);
		$retour = unserialize($this->cache->charger($id));
		if ($retour == false) {
			$retour = $this->mettreEnCache($ressources, $parametres);
		}
		
		return $retour;
	}
	
	public function mettreEnCache($ressources, $parametres) {
		$retour = $this->service->consulter($ressources, $parametres);
		$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 = $this->serviceNom.'/'.md5($chaineRessources.$chaineParametres);
		return $chaineMD5;
	}
}


?>