<?php
/**
* Description :
* Classe principale de chargement des services de syndication
*
* Encodage en entrée : utf8
* Encodage en sortie : utf8
* @package del-service
* @author Aurélien PERONNET <aurelien@tela-botanica.org>
* @license GPL v3 <http://www.gnu.org/licenses/gpl.txt>
* @license CECILL v2 <http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt>
* @version 0.1
* @copyright 1999-2011 Tela Botanica (accueil@tela-botanica.org)
*/
class Syndication extends RestService {

	private $parametres = array();
	private $ressources = array();
	private $methode = null;
	private $projetNom = array();
	private $serviceNom = array();
	private $cheminCourant = null;
	private $squelette_dossier = null;
	private $formats_autorises = null;

	private $conteneur;

	/** Indique si oui (true) ou non (false), on veut utiliser les paramètres bruts. */
	protected $utilisationParametresBruts = true;

	public function __construct() {
		$this->cheminCourant = dirname(__FILE__).DS;
		$this->squelette_dossier = dirname(__FILE__).DS.'syndication'.DS.'squelettes'.DS;
	}

	public function consulter($ressources, $parametres) {
		$this->methode = 'consulter';
		$resultat = '';
		$reponseHttp = new ReponseHttp();
		try {
			$this->initialiserProjet();
			$this->initialiserRessourcesEtParametres($ressources, $parametres);
			$this->conteneur = new Conteneur($this->parametres);
			$this->verifierRessourcesEtParametres();
			$resultat = $this->traiterRessources();
			$reponseHttp->setResultatService($this->creerResultatService($resultat));
		} catch (Exception $e) {
			$reponseHttp->ajouterErreur($e);
		}
		$reponseHttp->emettreLesEntetes();
		$corps = $reponseHttp->getCorps();
		return $corps;
	}

	private function initialiserRessourcesEtParametres($ressources, $parametres) {
		$this->ressources = $ressources;
		$this->parametres = $parametres;
	}

	private function verifierRessourcesEtParametres() {
		$servicesDispos = Config::get('servicesDispo');
		if (!isset($this->ressources[0]) || !in_array($this->ressources[0], explode(',',$servicesDispos))) {
			$message = "Vous devez indiquer un nom de service valide, les services disponibles sont ".$servicesDispos;
			$code = RestServeur::HTTP_CODE_ERREUR;
			throw new Exception($message, $code);
		}

		$chaineFormatsAutorises = Config::get('formatsRss');
		$this->formats_autorises = explode(',', $chaineFormatsAutorises);
		if (!isset($this->ressources[1]) || !in_array($this->ressources[1], $this->formats_autorises)) {
			$message = "Vous devez indiquer un format de flux valide, les formats acceptés sont ".$chaineFormatsAutorises;
			$code = RestServeur::HTTP_CODE_ERREUR;
			throw new Exception($message, $code);
		} else {
			$this->format = $this->ressources[1];
		}
	}

	private function traiterRessources() {
		$retour = '';
		$retour = $this->initialiserService();
		return $retour;
	}

	private function creerResultatService($donnees) {
		$resultat = new ResultatService();
		$resultat->mime = $this->getTypeMime();
		$resultat->corps = SquelettePhp::analyser($this->squelette_dossier.$this->format.'.tpl.xml', $donnees);
		return $resultat;
	}

	/*------------------------------------------------------------------------------------------------------------------
										CONFIGURATION DU PROJET
	------------------------------------------------------------------------------------------------------------------*/
	private function initialiserProjet() {
		$this->projetNom = 'syndication';
		$this->chargerConfigProjet();
	}

	private function chargerConfigProjet() {
		$projet = $this->projetNom;
		$chemin = Config::get('chemin_configurations')."config_$projet.ini";
		Config::charger($chemin);
	}

	/*------------------------------------------------------------------------------------------------------------------
								CONFIGURATION DU SERVICE
	------------------------------------------------------------------------------------------------------------------*/
	private function initialiserService() {
		$this->chargerNomService();

		$classe = $this->obtenirNomClasseService($this->serviceNom);
		$chemins = array();
		$chemins[] = $this->cheminCourant.$this->projetNom.DS.$classe.'.php';
		$chemins[] = $this->cheminCourant.'commun'.DS.$classe.'.php';
		$retour = '';
		$service = null;
		foreach ($chemins as $chemin) {
			if (file_exists($chemin)) {
				$this->conteneur->chargerConfiguration('config_'.$this->projetNom.'.ini');
				require_once $chemin;
				$service = new $classe($this->conteneur);
				if ($this->methode == 'consulter') {
					$retour = $service->consulter($this->ressources, $this->parametres);
				}
			}
		}

		if (is_null($service)) {
			$message = "Le service demandé '{$this->serviceNom}' n'existe pas dans le projet {$this->projetNom} !";
			$code = RestServeur::HTTP_CODE_RESSOURCE_INTROUVABLE;
			throw new Exception($message, $code);
		}
		return $retour;
	}

	private function chargerNomService() {
		if (!isset($this->ressources[0])) {
			$message = "Vous devez indiquer un nom de service";
			$code = RestServeur::HTTP_CODE_ERREUR;
			throw new Exception($message, $code);
		} else {
			$this->serviceNom = $this->ressources[0];
		}
	}

	private function obtenirNomClasseService($mot) {
		$classeNom = 'Syndication'.ucwords($mot);
		return $classeNom;
	}

	private function getTypeMime() {
		$mime = '';
		switch ($this->format) {
			case 'atom' :
				$mime = 'application/atom+xml';
				break;
			case 'rss1' :
			case 'rss2' :
				$mime = 'application/rss+xml';
				break;
			case 'opml' :
				$mime = 'text/x-opml';
				break;
			default:
				$mime = 'text/html';
		}
		return $mime;
	}
}
?>