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<?php
/**
 * Classe principale de chargement des sous-services d'accès aux infos sur les communes.
 *
 * Encodage en entrée : utf8
 * Encodage en sortie : utf8
 *
 * @category    DEL
 * @package             Services
 * @subpackage  Communes
 * @version             0.1
 * @author              Jennifer DHÉ <jennifer.dhe@tela-botanica.org>
 * @author              Delphine CAUQUIL <delphine@tela-botanica.org>
 * @author              Jean-Pascal MILCENT <jpm@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>
 * @copyright   ©1999-2014, Tela Botanica (<accueil@tela-botanica.org>)
 */
class Communes extends RestService {

        private $parametres = array();
        private $ressources = array();
        private $methode = null;
        private $serviceNom = 'communes';
        private $sousServiceNom = null;
        private $cheminCourant = 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;
        }

        public function consulter($ressources, $parametres) {
                $this->methode = 'consulter';
                $this->initialiserRessourcesEtParametres($ressources, $parametres);
                return $this->executerService();
        }

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

        private function executerService() {
                $reponseHttp = new ReponseHttp();
                try {
                        $this->conteneur = new Conteneur($this->parametres);
                        $resultat = $this->traiterRessources();
                        $reponseHttp->setResultatService($resultat);
                } catch (Exception $e) {
                        $reponseHttp->ajouterErreur($e);
                }
                $reponseHttp->emettreLesEntetes();
                $corps = $reponseHttp->getCorps();
                return $corps;
        }

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

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

        private function analyserRessources() {
                if ($this->methode == 'consulter') {
                        if (count($this->ressources) == 0) {
                                if ($this->verifierPresenceParametre('masque.nom')) {
                                        $this->sousServiceNom = 'liste-communes';
                                } else {
                                        $message = "Le service demandé '{$this->serviceNom}' ".
                                                "nécessite l'utilisation d'un paramètre (non vide) : masque.nom \n";
                                        $code = RestServeur::HTTP_CODE_ECHEC_CONDITION;
                                        throw new Exception($message, $code);
                                }
                        }
                }
                if ($this->sousServiceNom == null) {
                        $this->lancerMessageErreurRessource();
                }
        }

        private function verifierPresenceParametre($cle) {
                $ok = false;
                if (isset($this->parametres[$cle]) && trim($this->parametres[$cle]) != '') {
                        $ok = true;
                }
                return $ok;
        }

        private function lancerMessageErreurRessource() {
                $ressource = $this->sousServiceNom.'/'.implode('/', $this->ressources);
                $message = "La ressource demandée '$ressource' ".
                        "n'est pas disponible pour le service ".$this->serviceNom." !\n".
                        "Les URLs disponibles sont : \n".
                        " - en GET : communes (paramètres : masque.nom) \n";
                $code = RestServeur::HTTP_CODE_RESSOURCE_INTROUVABLE;
                throw new Exception($message, $code);
        }

        private function initialiserService() {
                $classe = $this->obtenirNomClasseService($this->sousServiceNom);
                $chemins = array();
                $chemins[] = $this->cheminCourant.$this->serviceNom.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->serviceNom.'.ini');
                                require_once $chemin;
                                $service = new $classe($this->conteneur);
                                if ($this->methode == 'consulter') {
                                        $retour = $service->consulter($this->ressources, $this->parametres);
                                } else {
                                        $message = "Le sous-service '{$this->sousServiceNom}' du service '{$this->serviceNom}' ".
                                                "ne possède pas de méthode '{$this->methode}' !";
                                        $code = RestServeur::HTTP_NON_IMPLEMENTE;
                                        throw new Exception($message, $code);
                                }
                        }
                }

                if (is_null($service)) {
                        $ressource = $this->sousServiceNom.'/'.implode('/', $this->ressources);
                        $message = "Le classe '$classe' correspondant à la ressource '$ressource' ".
                                "est introuvable par le service '{$this->serviceNom}' !";
                        $code = RestServeur::HTTP_CODE_RESSOURCE_INTROUVABLE;
                        throw new Exception($message, $code);
                }
                return $retour;
        }

        private function obtenirNomClasseService($mot) {
                $classeNom = str_replace(' ', '', ucwords(strtolower(str_replace('-', ' ', $mot))));
                return $classeNom;
        }
}