Subversion Repositories eFlore/Applications.del

<?php
// declare(encoding='UTF-8');
/**
 * Classe principale de chargement des services Observations.
 *
 * URLs possibles :
 * GET :
 * http://localhost/service:del:0.1/observations
 * toutes les observations (infos obs, infos images, infos propositions, infos nb commentaires)
 *
 * http://localhost/service:del:0.1/observations?retour.format=widget
 * toutes les infos des observations pour le Widget DEL
 *
 * http://localhost/service:del:0.1/observations/#idObs
 * une observation donnée et ses images, SANS LES propositions & nombre de commentaire*
 *
 * http://localhost/service:del:0.1/observations/#idObs/#idVote/vote
 * toutes les infos sur les votes d'une proposition
 *
 * PUT :
 * http://localhost/service:del:0.1/observations/#idObs/#idCommentaire/vote
 * ajoute un vote (+ ou -) pour une obs et une proposition donnée
 *
 * POST :
 * http://localhost/service:del:0.1/observations/#idObs
 * utilisé seulement par les admins pour modifier une obs depuis DEL (dépublication des obs)
 *
 * http://localhost/service:del:0.1/observations/#idObs/#idCommentaire/vote
 * modifie un vote (+ ou -) pour une obs et une proposition donnée
 *
 * @category   DEL
 * @package    Services
 * @subpackage Observations
 * @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 Observations extends RestService {

        private $parametres = array();
        private $ressources = array();
        private $methode = null;
        private $serviceNom = 'observations';
        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();
        }

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

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

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

        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);
        }

        /*------------------------------------------------------------------------------------------------------------------
                                                                CONFIGURATION DU SERVICE
        ------------------------------------------------------------------------------------------------------------------*/

        private function analyserRessources() {
                if ($this->methode == 'consulter') {
                        $this->analyserRessoucesConsultation();
                } else if ($this->methode == 'modifier' || $this->methode == 'ajouter') {
                        $this->analyserRessoucesModification();
                }
        }

        private function analyserRessoucesConsultation() {
                if (count($this->ressources) == 0) {
                        if ($this->verifierParametreValeur('retour.format', 'widget')) {
                                // http://localhost/service:del:0.1/observations?retour.format=widget
                                $this->sousServiceNom = 'liste-observations-widget';
                        } else {
                                // http://localhost/service:del:0.1/observations
                                $this->sousServiceNom = 'liste-observations';
                        }
                } else if (count($this->ressources) == 1) {
                        if ($this->etreRessourceIdentifiant(0)) {
                                // http://localhost/service:del:0.1/observations/#idObs
                                $this->sousServiceNom = 'observation';
                        }
                } else if (count($this->ressources) == 3) {
                        if ($this->etreRessourceIdentifiant(0) && $this->etreRessourceIdentifiant(1) && $this->verifierRessourceValeur(2, 'vote')) {
                                // http://localhost/service:del:0.1/observations/#idObs/#idProposition/vote/
                                $this->sousServiceNom = 'vote-observation';
                        }
                }

                if ($this->sousServiceNom == null) {
                        $this->lancerMessageErreurRessource();
                }
        }

        private function analyserRessoucesModification() {
                if (count($this->ressources) == 1) {
                        if ($this->methode == 'modifier' && $this->etreRessourceIdentifiant(0)) {
                                // http://localhost/service:del:0.1/observations/#idObs
                                $this->sousServiceNom = 'observation';
                        }
                } else if (count($this->ressources) == 3) {
                        if ($this->etreRessourceIdentifiant(0) && $this->etreRessourceIdentifiant(1) && $this->verifierRessourceValeur(2, 'vote')) {
                                // http://localhost/service:del:0.1/observations/#idObs/#idProposition/vote/
                                $this->sousServiceNom = 'vote-observation';
                        }
                }

                if ($this->sousServiceNom == null) {
                        $this->lancerMessageErreurRessource();
                }
        }

        private function etreRessourceIdentifiant($num) {
                $presenceId = false;
                if (isset($this->ressources[$num]) && is_numeric($this->ressources[$num])) {
                        $presenceId = true;
                }
                return $presenceId;
        }

        private function verifierRessourceValeur($num, $valeur) {
                $ok = false;
                if (isset($this->ressources[$num]) && $this->ressources[$num] == $valeur) {
                        $ok = true;
                }
                return $ok;
        }

        private function verifierParametreValeur($cle, $valeur) {
                $ok = false;
                if (isset($this->parametres[$cle]) && $this->ressources[$cle] == $valeur) {
                        $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 : observations, observations/#idObs/#idProposition/vote \n".
                        " - en POST : observations/#id, observations/#idObs/#idProposition/vote \n".
                        " - en PUT : observations/#idObs/#idProposition/vote \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, $this->parametres);
                                } elseif ($this->methode == 'ajouter') {
                                        $retour = $service->ajouter($this->ressources, $this->parametres);
                                } elseif ($this->methode == 'modifier') {
                                        $retour = $service->modifier($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 '$ressource' ".
                                "n'existe pas dans le service '{$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;
        }
}