<?php

namespace api\module\ue;


use database\core\Repo;
use database\repo\cours;
use error\core\Error;
use error\core\Err;

class coursController{


	/* (1) Create a new Cours
	*
	* @code<String>					UE code
	*
	* @return groups<array>			The list of groups for this UE
	*
	---------------------------------------------------------*/
	public static function post($args){
		$code = "";
		$idProf = null;
		$volume = 0;
		$formations = [];
		extract($args);

		/* Get the cours repo */
		/** @var cours $cours_repo */
		$cours_repo = Repo::getRepo('cours');

		/* (1) Try to create cours */
		$created_id = $cours_repo->create($code, $idProf, $volume, $formations);

		/* (2) Manage error */
		if( is_null($created_id) || !is_int($created_id) )
			return ['error' => new Error(Err::RepoError)];

		return ['created_id' => $created_id];

	}


	/* (2) Get groups for a specific UE
	*
	* @code<String>					UE code
	*
	* @return groups<array>			The list of groups for this UE
	*
	---------------------------------------------------------*/
	public static function get($args){
		$code             = "";
		extract($args);

		/* Get the cours repo */
		/** @var cours $cours_repo */
		$cours_repo = Repo::getRepo('cours');

		/* (1) Try to fetch data */
		$fetched = $cours_repo->getGroups($code);

		/* (2) Manage error */
		if( is_null($fetched) || !is_array($fetched) )
			return ['error' => new Error(Err::RepoError)];

		/* (3) Parse JSON list */
		foreach($fetched as $f=>$v)
			$fetched[$f]['formations'] = json_decode($v['formations']);


		return ['groups' => $fetched];

	}


	/* (3) Updates an existing Cours
	*
	* @idCours<int>					Id of the Cours to update
	* @idProf<int>					[OPT] The new professor ID (-1 to unset)
	* @volume<int>					[OPT] The new number of hours for the Cours
	* @add_form<array>				List of ids of formations to add
	* @rem_form<array>				List of ids of formations to remove
	*
	* @return updated<bool>			Whether the Cours have been updated
	*
	---------------------------------------------------------*/
	public static function put($args){
		$idCours  = -1;
		$idProf   = null;
		$volume   = null;
		$add_form = [];
		$rem_form = [];
		extract($args);

		/* Get the cours repo */
		/** @var cours $cours_repo */
		$cours_repo = Repo::getRepo('cours');

		/* (1) If nothing to do -> error */
		if( is_null($idProf) && is_null($volume) && count($add_form) + count($rem_form) == 0)
			return ['error' => new Error(Err::MissingParam)];

		/* (2) If have to update @idProf */
		if( !is_null($idProf) ){

			// call repo
			$updated = $cours_repo->updateProf($idCours, $idProf < 0 ? NULL : $idProf );

			// if error -> dispatch
			if( !$updated )
				return ['error' => new Error(Err::RepoError)];

		}

		/* (3) If have to update @volume */
		if( !is_null($volume) ){

			// call repo
			$updated = $cours_repo->updateVolume($idCours, $volume);

			// if error -> dispatch
			if( !$updated )
				return ['error' => new Error(Err::RepoError)];

		}

		/* (4) If have to add formations -> add them */
		if( count($add_form) > 0 ){

			foreach($add_form as $id_form)
				$cours_repo->linkFormation($id_form, $idCours);

		}

		/* (5) If have to remove formations -> remove them */
		if( count($rem_form) > 0 ){

			foreach($rem_form as $id_form)
				$cours_repo->unlinkFormation($id_form, $idCours);

		}


		return ['updated' => true];

	}


	/* (4) Deletes an existing Cours
	*
	* @idCours<int>					Id of the Cours
	*
	* @return deleted<bool>			Whether it has been deleted
	*
	---------------------------------------------------------*/
	public static function delete($args){
		$idCours = 0;
		extract($args);

		/* Get the cours repo */
		/** @var cours $cours_repo */
		$cours_repo = Repo::getRepo('cours');

		/* (1) Dispatch response from repo */
		return ['deleted' => $cours_repo->delete($idCours)];

	}


}