<?php
// declare(encoding='UTF-8');
/**
 * Classe principale de chargement des sous-services de Protocoles.
 *
 * Urls possibles :
 * http://localhost/service:del:0.1/protocoles => tous les protocoles
 *
 * @category   DEL
 * @package    Services
 * @subpackage Protocoles
 * @version    0.1
 * @author     Mathias CHOUET <mathias@tela-botanica.org>
 * @author     Jean-Pascal MILCENT <jpm@tela-botanica.org>
 * @author     Aurelien 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>
 * @copyright  1999-2014 Tela Botanica <accueil@tela-botanica.org>
 */
class Protocoles extends RestService {

	private $parametres = array();
	private $ressources = array();
	private $methode = null;
	private $serviceNom = 'protocoles';
	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->analyserRessources();
		$retour = $this->initialiserService();
		return $retour;
	}

	private function analyserRessources() {
		if ($this->methode == 'consulter') {
			if (count($this->ressources) == 0) {
				$this->sousServiceNom = 'liste-protocoles';
			}
		}
		if ($this->sousServiceNom == null) {
			$this->lancerMessageErreurRessource();
		}
	}

	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 : protocoles (paramètres : aucun) \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)) {
				require_once $chemin;
				$service = new $classe($this->conteneur);
				if ($this->methode == 'consulter') {
					$retour = $service->consulter();
				} 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;
	}
}