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

<?php
/**
 * Created by PhpStorm.
 * User: lucas
 * Date: 22/02/18
 * Time: 13:27
 */

namespace database\repo;


use database\core\Repo_i;

class cours extends Repo_i {

	public function create(string $codeUE, ?int $idProf, float $volume, array $formations) : int{
		//create the group
		$st = $this->pdo->prepare("INSERT INTO Cours(UE_code, Professeur_idProfesseur, volume)
											 VALUE(:UE, :idProf, :vol)");
		$st->execute([
			"UE" => $codeUE,
			"idProf" => $idProf,
			"vol" => $volume
		]);

		$idCours = $this->pdo->lastInsertId();

		//if there is formations, link them with the group
		if(count($formations) > 0){
			$linkSt = $this->pdo->prepare("INSERT INTO GroupeCours(Formation_idFormation, Cours_idCours)
													 VALUE (:form, :cours)");
			foreach ($formations as $form){
				$linkSt->execute([
					"form" => $form,
					"cours" => $idCours
				]);
			}
		}

		return $idCours;

	}

	public function unlinkFormation(int $idFormation, int $idCours) : bool{
		$st = $this->pdo->prepare("DELETE FROM GroupeCours WHERE Cours_idCours = :cours AND Formation_idFormation = :form");

		return $st->execute([
			"cours" => $idCours,
			"form" => $idFormation
		]);
	}

	public function linkFormation(int $idFormation, int $idCours) : bool{
		$st = $this->pdo->prepare("INSERT INTO GroupeCours(Cours_idCours,Formation_idFormation)
											 VALUE(:cours, :form)");

		return $st->execute([
			"cours" => $idCours,
			"form" => $idFormation
		]);
	}

	public function updateProf(?int $prof) : bool {
		$st = $this->pdo->prepare("UPDATE Cours SET Professeur_idProfesseur = :prof");

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

	public function updateVolume(float $volume) : bool {
		$st = $this->pdo->prepare("UPDATE Cours SET volume = :vol");

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

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

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


	/* (x) Get groups for a specific UE
	*
	* @code<String>					UE code
	*
	* @return groups<array>			The list of groups for this UE
	* 								NULL on error
	*
	---------------------------------------------------------*/
	public function getGroups(String $code) : ?array{

		/* (1) Prepare statement */
		$st = $this->pdo->prepare("SELECT
				c.UE_code code,
				c.idCours,
				p.idProfesseur idProf,
				p.firstName,
				p.lastName,
				IFNULL(lform.flist, '[]') formations,
				c.volume
			FROM Cours c
			LEFT JOIN ( SELECT gc.Cours_idCours idCours, CONCAT('[', GROUP_CONCAT(DISTINCT gc.Formation_idFormation),']') flist
				FROM GroupeCours gc
				GROUP BY gc.Cours_idCours
				ORDER BY gc.Formation_idFormation DESC
			) lform ON c.idCours = lform.idCours
			LEFT JOIN Professeur p ON p.idProfesseur = c.Professeur_idProfesseur
			WHERE c.UE_code = :code;");

		/* (2) Check statement */
		if( is_bool($st) )
			return NULL;

		/* (3) Execute statement */
		$success = $st->execute([':code' => $code]);

		/* (4) Check error */
		if( !$success )
			return NULL;

		/* (5) Dispatch fetch result */
		return $st->fetchAll();


	}

}