<?php
//FJ Moodle integrator

//core_calendar_create_calendar_events function
function core_calendar_create_calendar_events_object()
{
	//first, gather the necessary variables
	global $_REQUEST;

	//then, convert variables for the Moodle object:
	/*
	list of (
	//event
	object {
	name string   //event name
	description string  Default to "null" //Description
	format int  Default to "1" //description format (1 = HTML, 0 = MOODLE, 2 = PLAIN or 4 = MARKDOWN)
	courseid int  Default to "0" //course id
	groupid int  Default to "0" //group id
	repeats int  Default to "0" //number of repeats
	eventtype string  Default to "user" //Event type
	timestart int  Default to "1370827707" //timestart
	timeduration int  Default to "0" //time duration (in minutes)
	visible int  Default to "1" //visible
	sequence int  Default to "1" //sequence
	}
	)
	 */
	//update_calendar_event

	if ( $_REQUEST['event_id'] !== 'new' )
	{
		//get calendar event title & description
		$calendar_event = DBGet( "SELECT TITLE,DESCRIPTION
			FROM calendar_events
			WHERE ID='" . (int) $_REQUEST['event_id'] . "'" );
	}

	if ( empty( $_REQUEST['values']['TITLE'] ) )
	{
		$name = $calendar_event[1]['TITLE'];
	}
	else
	{
		$name = $_REQUEST['values']['TITLE'];
	}

	if ( ! isset( $_REQUEST['values']['DESCRIPTION'] ) )
	{
		$description = $calendar_event[1]['DESCRIPTION'];
	}
	else
	{
		$description = $_REQUEST['values']['DESCRIPTION'];
	}

	$format = 4;
	$courseid = 1;
	$eventtype = 'site';
	$timestart = strtotime( $_REQUEST['values']['SCHOOL_DATE'] );

	$events = [
		[
			'name' => $name,
			'description' => $description,
			'format' => $format,
			'courseid' => $courseid,
			'timestart' => $timestart,
			'eventtype' => $eventtype,
		],
	];

	if ( MOODLE_API_PROTOCOL === 'rest' )
	{
		return [ 'events' => $events ];
	}

	return [ $events ];
}

/**
 * @param $response
 */
function core_calendar_create_calendar_events_response( $response )
{
	//first, gather the necessary variables
	global $calendar_event_id, $_REQUEST;

	//then, save the ID in the moodlexrosario cross-reference table if no error:
	/*
	object {
	events list of (
	//event
	object {
	id int   //event id
	name string   //event name
	description string  Optional //Description
	format int   //description format (1 = HTML, 0 = MOODLE, 2 = PLAIN or 4 = MARKDOWN)
	courseid int   //course id
	groupid int   //group id
	userid int   //user id
	repeatid int  Optional //repeat id
	modulename string  Optional //module name
	instance int   //instance id
	eventtype string   //Event type
	timestart int   //timestart
	timeduration int   //time duration
	visible int   //visible
	uuid string  Optional //unique id of ical events
	sequence int   //sequence
	timemodified int   //time modified
	subscriptionid int  Optional //Subscription id
	}
	)warnings  Optional //list of warnings
	list of (
	//warning
	object {
	item string  Optional //item
	itemid int  Optional //item id
	warningcode string   //the warning code can be used by the client app to implement specific behaviour
	message string   //untranslated english message to explain the warning
	}
	)}
	 */

	if ( isset( $response['warnings'][0] )
		&& is_array( $response['warnings'][0] ) )
	{
		global $error;

		$error[] = 'Moodle: ' . 'Code: ' . $response['warnings'][0]['warningcode'] . ' - ' .
			$response['warnings'][0]['message'];

		return false;
	}

	if ( empty( $response['events'][0]['id'] ) )
	{
		return false;
	}

	if ( empty( $calendar_event_id ) ) //case: update event
	{
		$calendar_event_id = $_REQUEST['event_id'];
	}

	DBQuery( "INSERT INTO moodlexrosario (" . DBEscapeIdentifier( 'column' ) . ",rosario_id,moodle_id)
		VALUES('calendar_event_id', '" . $calendar_event_id . "', " . $response['events'][0]['id'] . ")" );

	return null;
}

//core_calendar_delete_calendar_events function
function core_calendar_delete_calendar_events_object()
{
	//first, gather the necessary variables
	global $_REQUEST;

	//then, convert variables for the Moodle object:
	/*
	list of (
	//List of events to delete
	object {
	eventid int   //Event ID
	repeat int   //Delete comeplete series if repeated event
	}
	)
	 */

	//gather the Moodle Event ID
	$eventid = MoodleXRosarioGet( 'calendar_event_id', $_REQUEST['event_id'] );

	if ( empty( $eventid ) )
	{
		return null;
	}

	$repeat = 0;

	$events = [
		[
			'eventid' => $eventid,
			'repeat' => $repeat,
		],
	];

	if ( MOODLE_API_PROTOCOL === 'rest' )
	{
		return [ 'events' => $events ];
	}

	return [ $events ];
}

/**
 * @param $response
 */
function core_calendar_delete_calendar_events_response( $response )
{
	//first, gather the necessary variables
	global $_REQUEST;

	$rosario_id = $_REQUEST['event_id'];

	//delete the reference the moodlexrosario cross-reference table:
	DBQuery( "DELETE FROM moodlexrosario
		WHERE " . DBEscapeIdentifier( 'column' ) . "='calendar_event_id'
		AND rosario_id='" . (int) $rosario_id . "'" );

	return null;
}