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470 jpm 1 
<?php
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// declare(encoding='UTF-8');
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/**
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* Classe modèle spécifique à l'application, donc d'accés au données, elle ne devrait pas être appelée de l'extérieur.
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*
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* @category	php5
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* @package 	Widget
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* @author		Jean-Pascal MILCENT <jpm@tela-botanica.org>
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* @copyright	2010 Tela-Botanica
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* @license		http://www.cecill.info/licences/Licence_CeCILL_V2-fr.txt Licence CECILL
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* @license		http://www.gnu.org/licenses/gpl.html Licence GNU-GPL
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* @version		SVN: $Id$
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*/
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class Dao {
698 jpm 15 
	const HTTP_URL_REQUETE_SEPARATEUR = '&';
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	private $http_methodes = array('GET', 'POST', 'PUT', 'DELETE', 'HEAD', 'OPTIONS', 'CONNECT', 'TRACE');
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	protected $parametres = null;
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	private $url = null;
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	private $reponse_entetes = null;
470 jpm 20 
 
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	//+----------------------------------------------------------------------------------------------------------------+
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	// ACCESSEURS
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	public function getReponseEntetes($cle) {
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		return $this->reponse_entetes;
470 jpm 26 
	}
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	public function getParametre($cle) {
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		$valeur = (isset($this->parametres[$cle])) ? $this->parametres[$cle] : null;
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		return $valeur;
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	}
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	public function ajouterParametre($cle, $valeur) {
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		$this->parametres[$cle] = $valeur;
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	}
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	public function supprimerParametre($cle) {
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		unset($this->parametres[$cle]);
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	}
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	public function nettoyerParametres() {
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		$this->parametres = null;
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	}
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	//+----------------------------------------------------------------------------------------------------------------+
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	// MÉTHODES
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	public function consulter($url) {
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		$retour = $this->envoyerRequete($url, 'GET');
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		return $retour;
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	}
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698 jpm 53 
	public function ajouter($url, Array $donnees) {
470 jpm 54 
		$retour = $this->envoyerRequete($url, 'PUT', $donnees);
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		return $retour;
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	}
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698 jpm 58 
	public function modifier($url, Array $donnees) {
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		$retour = $this->envoyerRequete($url, 'POST', $donnees);
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		return $retour;
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	}
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698 jpm 63 
	public function supprimer($url) {
470 jpm 64 
		$retour = $this->envoyerRequete($url, 'DELETE');
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		return $retour;
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	}
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698 jpm 68 
	public function envoyerRequete($url, $mode, Array $donnees = array()) {
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		$this->url = $url;
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		$contenu = false;
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		if (! in_array($mode, $this->http_methodes)) {
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			$e = "Le mode de requête '$mode' n'est pas accepté!";
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			trigger_error($e, E_USER_WARNING);
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		} else {
698 jpm 75 
			if ($mode == 'GET') {
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				$this->traiterUrlParametres();
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			}
470 jpm 78 
			$contexte = stream_context_create(array(
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				'http' => array(
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      				'method' => $mode,
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					'header' => "Content-type: application/x-www-form-urlencoded\r\n",
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      				'content' => http_build_query($donnees, null, self::HTTP_URL_REQUETE_SEPARATEUR))));
470 jpm 83 
			$flux = @fopen($url, 'r', false, $contexte);
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			if (!$flux) {
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				$this->reponse_entetes = $http_response_header;
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				$e = "L'ouverture de l'url '$url' par la méthode HTTP '$mode' a échoué!";
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				trigger_error($e, E_USER_WARNING);
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			} else {
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				// Informations sur les en-têtes et métadonnées du flux
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				$this->reponse_entetes = stream_get_meta_data($flux);
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				// Contenu actuel de $url
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				$contenu = stream_get_contents($flux);
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				fclose($flux);
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			}
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			$this->traiterEntete();
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		}
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		$this->reinitialiser();
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		return $contenu;
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	}
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	private function traiterUrlParametres() {
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		$parametres = array();
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		if (count($this->parametres) > 0) {
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			foreach ($this->parametres as $cle => $valeur) {
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				$parametres[] = $cle.self::HTTP_URL_REQUETE_CLE_VALEUR_SEPARATEUR.$valeur;
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			}
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			$url_parametres = implode(self::HTTP_URL_REQUETE_SEPARATEUR, $parametres);
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			$this->url = $this->url.'?'.$url_parametres;
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		}
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	}
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698 jpm 114 
	private function traiterEntete() {
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		$infos = $this->analyserEntete();
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		$this->traiterEnteteDebogage($infos);
470 jpm 117 
	}
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698 jpm 119 
	private function analyserEntete() {
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		$entetes = $this->reponse_entetes;
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		$infos = array('date' => null, 'uri' => $this->url, 'debogages' => null);
470 jpm 122 
 
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		if (isset($entetes['wrapper_data'])) {
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			$entetes = $entetes['wrapper_data'];
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		}
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		foreach ($entetes as $entete) {
698 jpm 127 
			if (preg_match('/^X_REST_DEBOGAGE_MESSAGES: (.+)$/', $entete, $match)) {
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				$infos['debogages'] = json_decode($match[1]);
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			}
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			if (preg_match('/^Date: .+ ([012][0-9]:[012345][0-9]:[012345][0-9]) .*$/', $entete, $match)) {
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				$infos['date'] = $match[1];
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			}
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		}
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		return $infos;
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	}
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698 jpm 137 
	private function traiterEnteteDebogage($entetes_analyses) {
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		if (isset($entetes['debogages'])) {
470 jpm 139 
			$date = $entetes['date'];
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			$uri = $entetes['uri'];
698 jpm 141 
			$debogages = $entetes['debogages'];
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			foreach ($debogages as $debogage) {
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				$e = "DEBOGAGE : $date - $uri :\n$debogage";
470 jpm 144 
				trigger_error($e, E_USER_NOTICE);
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			}
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		}
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	}
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	private function reinitialiser() {
698 jpm 150 
		$this->nettoyerParametres();
470 jpm 151 
	}
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}