New file |
0,0 → 1,89 |
<?php |
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/** FONCTIONS D'ASSEMBLAGE DE REQUETE |
* |
* @package eflore-projets |
* @author Mathilde SALTHUN-LASSALLE <mathilde@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> |
* @version 1.0 |
* @copyright 1999-2011 Tela Botanica (accueil@tela-botanica.org) |
*/ |
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class RequetesAssemblage { |
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private $table; |
private $total_resultat; |
private $Bdd; |
private $condition; |
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public function __construct(BDD $bdd) { |
$this->Bdd = $bdd; |
} |
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public function getTotal_resultat() { |
return $this->total_resultat; |
} |
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public function retournerRequeteJointure($requete_jointure) { |
$jointure = ''; |
if ($requete_jointure !== "") { |
foreach ($requete_jointure as $req_j) { |
$jointure .= ' '.$req_j['type'].' '.$req_j['table'].' ON ' |
.implode(' AND', $req_j['on']); |
} |
} |
return $jointure; |
} |
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public function assemblerLaRequete(Requete $requete_param) { |
$this->table = $requete_param->table; |
$requete_jointure = $this->retournerRequeteJointure($requete_param->requete_jointure); |
$this->condition = $this->retournerRequeteCondition($requete_param->requete_condition); |
$limites = $this->delimiterResultatsRequete($requete_param->limite_besoin, $requete_param->limite_requete); |
$requete = ' SELECT '.$requete_param->champs_recherches.' FROM '.$requete_param->table.' ' |
.$requete_jointure .' '.$this->condition.' '.$limites; |
return $requete; |
} |
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public function retournerRequeteCondition($requete_condition) { |
$condition = ''; |
if ($requete_condition !== "") { |
$condition = ' WHERE '.implode(' AND ', $requete_condition); |
} |
return $condition; |
} |
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public function calculerTotalResultat() { |
$requete = 'SELECT count(*) as nombre FROM '.$this->table.' '.$this->condition; |
$res = $this->Bdd->recuperer($requete); |
if ($res) { |
$this->total_resultat = $res['nombre']; |
} else { |
$this->total_resultat = 0; |
$e = 'Données introuvables dans la base'; |
throw new Exception($e, RestServeur::HTTP_CODE_RESSOURCE_INTROUVABLE); |
} |
} |
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public function delimiterResultatsRequete($limite_besoin, $limite_requete) { |
$this->calculerTotalResultat(); |
$requete_limite = ''; |
if ($limite_besoin) { |
if (($limite_requete['depart'] < $this->total_resultat) && |
(($limite_requete['limite'] + $limite_requete['depart'] ) |
< $this->total_resultat )) { |
$requete_limite = 'LIMIT '.$limite_requete['depart'].', ' |
.$limite_requete['limite']; |
} else { |
$e = "Erreur : la valeur pour le paramètre navigation.départ est supérieure". |
" au nombre total de résultats."; |
throw new Exception($e, RestServeur::HTTP_CODE_RESSOURCE_INTROUVABLE); |
} |
} |
return $requete_limite; |
} |
} |
?> |