ptut-vhost/build/database/repo/category.php

<?php
/**
 * Created by PhpStorm.
 * User: lucas
 * Date: 20/02/18
 * Time: 21:00
 */

namespace database\repo;


use database\core\Repo_i;

class category extends Repo_i{

	public function create(int $id, string $label) : bool{
		//create the category or update the label
		$st = $this->pdo->prepare("INSERT INTO Categorie (idCategorie, labelCategorie) VALUE (:id, :label)");

		return $st->execute([
			"id" => $id,
			"label" => $label
		]);

	}

	public function delete(int $id) :bool{
		$st = $this->pdo->prepare("DELETE FROM Categorie WHERE idCategorie = :id");

		return $st->execute([
			"id" => $id
		]);
	}

	public function getStats(?int $id = null){
		$st = $this->pdo->prepare("SELECT VHCours, VHTd, VHTp, Cat.idCategorie idCat, count(P.idProfesseur) nbrProf, Cat.labelCategorie labelCat
											FROM Categorie Cat
											  LEFT JOIN (SELECT IFNULL(SUM(Cours.volume),0) VHCours, Prof.Categorie_idCategorie idCat
											  			  FROM Professeur Prof
											  			  LEFT JOIN Cours ON Prof.idProfesseur = Cours.Professeur_idProfesseur
											  			  JOIN UE U ON Cours.UE_code = U.code
											  			  WHERE U.disabled = 0
											  			  GROUP BY Prof.Categorie_idCategorie) VHCours ON VHCours.idCat = Cat.idCategorie
											  			  
											  LEFT JOIN (SELECT IFNULL(SUM(TD.volume),0) VHTd , Prof.Categorie_idCategorie idCat
											  			FROM Professeur Prof
											  			LEFT JOIN TD ON TD.Professeur_idProfesseur = Prof.idProfesseur
											  			JOIN UE U2 ON TD.UE_code = U2.code
											  			WHERE U2.disabled = 0
											  			GROUP BY Prof.Categorie_idCategorie) VHTd ON VHTd.idCat = Cat.idCategorie
											  			
											  LEFT JOIN (SELECT IFNULL(SUM(TP.volume),0) VHTp, Prof.Categorie_idCategorie idCat
											  			FROM Professeur Prof
											  			LEFT JOIN TP ON TP.Professeur_idProfesseur = Prof.idProfesseur
											  			JOIN UE U3 ON TP.UE_code = U3.code
											  			WHERE U3.disabled = 0
											  			GROUP BY Prof.Categorie_idCategorie) VHTp ON VHTp.idCat = Cat.idCategorie
											  LEFT JOIN Professeur P ON Cat.idCategorie = P.Categorie_idCategorie
											  ".($id ? " WHERE Cat.idCategorie = :idCat" : "")."
											GROUP BY Cat.idCategorie;");

		$st->execute($id ? ["idCat" => $id] : []);

		if($id){
			return $st->fetch() ?: [];
		}else{
			return $st->fetchAll();
		}
	}

}