Subversion Repositories eFlore/Applications.del

<?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__).DIRECTORY_SEPARATOR.'syndication'.DIRECTORY_SEPARATOR.'squelettes'.DIRECTORY_SEPARATOR;
        }

        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;
        }
}
?>