sources/subs/Calendar.subs.php ➔ getCalendarGrid()

Complexity

Conditions	39
Paths	> 20000

Size

Total Lines

148

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
function getCalendarGrid($month, $year, $calendarOptions)
{
	global $scripturl, $modSettings;

	// Eventually this is what we'll be returning.
	$calendarGrid = array(
		'week_days' => array(),
		'weeks' => array(),
		'short_day_titles' => !empty($calendarOptions['short_day_titles']),
		'current_month' => $month,
		'current_year' => $year,
		'show_next_prev' => !empty($calendarOptions['show_next_prev']),
		'show_week_links' => !empty($calendarOptions['show_week_links']),
		'previous_calendar' => array(
			'year' => $month == 1 ? $year - 1 : $year,
			'month' => $month == 1 ? 12 : $month - 1,
			'disabled' => $modSettings['cal_minyear'] > ($month == 1 ? $year - 1 : $year),
		),
		'next_calendar' => array(
			'year' => $month == 12 ? $year + 1 : $year,
			'month' => $month == 12 ? 1 : $month + 1,
			'disabled' => date('Y') + $modSettings['cal_limityear'] < ($month == 12 ? $year + 1 : $year),
		),
		'size' => isset($calendarOptions['size']) ? $calendarOptions['size'] : 'large',
	);

	// Get todays date.
	$today = getTodayInfo();

	// Get information about this month.
	$month_info = array(
		'first_day' => array(
			'day_of_week' => (int) strftime('%w', mktime(0, 0, 0, $month, 1, $year)),
			'week_num' => (int) strftime('%U', mktime(0, 0, 0, $month, 1, $year)),
			'date' => strftime('%Y-%m-%d', mktime(0, 0, 0, $month, 1, $year)),
		),
		'last_day' => array(
			'day_of_month' => (int) strftime('%d', mktime(0, 0, 0, $month == 12 ? 1 : $month + 1, 0, $month == 12 ? $year + 1 : $year)),
			'date' => strftime('%Y-%m-%d', mktime(0, 0, 0, $month == 12 ? 1 : $month + 1, 0, $month == 12 ? $year + 1 : $year)),
		),
		'first_day_of_year' => (int) strftime('%w', mktime(0, 0, 0, 1, 1, $year)),
		'first_day_of_next_year' => (int) strftime('%w', mktime(0, 0, 0, 1, 1, $year + 1)),
	);

	// The number of days the first row is shifted to the right for the starting day.
	$nShift = $month_info['first_day']['day_of_week'];

	$calendarOptions['start_day'] = empty($calendarOptions['start_day']) ? 0 : (int) $calendarOptions['start_day'];

	// Starting any day other than Sunday means a shift...
	if (!empty($calendarOptions['start_day']))
	{
		$nShift -= $calendarOptions['start_day'];
		if ($nShift < 0)
			$nShift = 7 + $nShift;
	}

	// Number of rows required to fit the month.
	$nRows = floor(($month_info['last_day']['day_of_month'] + $nShift) / 7);
	if (($month_info['last_day']['day_of_month'] + $nShift) % 7)
		$nRows++;

	// Fetch the arrays for birthdays, posted events, and holidays.
	$bday = $calendarOptions['show_birthdays'] ? getBirthdayRange($month_info['first_day']['date'], $month_info['last_day']['date']) : array();
	$events = $calendarOptions['show_events'] ? getEventRange($month_info['first_day']['date'], $month_info['last_day']['date']) : array();
	$holidays = $calendarOptions['show_holidays'] ? getHolidayRange($month_info['first_day']['date'], $month_info['last_day']['date']) : array();

	// Days of the week taking into consideration that they may want it to start on any day.
	$count = $calendarOptions['start_day'];
	for ($i = 0; $i < 7; $i++)
	{
		$calendarGrid['week_days'][] = $count;
		$count++;
		if ($count == 7)
			$count = 0;
	}

	// An adjustment value to apply to all calculated week numbers.
	if (!empty($calendarOptions['show_week_num']))
	{
		// If the first day of the year is a Sunday, then there is no
		// adjustment to be made. However, if the first day of the year is not
		// a Sunday, then there is a partial week at the start of the year
		// that needs to be accounted for.
		if ($calendarOptions['start_day'] === 0)
			$nWeekAdjust = $month_info['first_day_of_year'] === 0 ? 0 : 1;
		// If we are viewing the weeks, with a starting date other than Sunday,
		// then things get complicated! Basically, as PHP is calculating the
		// weeks with a Sunday starting date, we need to take this into account
		// and offset the whole year dependant on whether the first day in the
		// year is above or below our starting date. Note that we offset by
		// two, as some of this will get undone quite quickly by the statement
		// below.
		else
			$nWeekAdjust = $calendarOptions['start_day'] > $month_info['first_day_of_year'] && $month_info['first_day_of_year'] !== 0 ? 2 : 1;

		// If our week starts on a day greater than the day the month starts
		// on, then our week numbers will be one too high. So we need to
		// reduce it by one - all these thoughts of offsets makes my head
		// hurt...
		if ($month_info['first_day']['day_of_week'] < $calendarOptions['start_day'] || $month_info['first_day_of_year'] > 4)
			$nWeekAdjust--;
	}
	else
		$nWeekAdjust = 0;

	// Iterate through each week.
	$calendarGrid['weeks'] = array();
	for ($nRow = 0; $nRow < $nRows; $nRow++)
	{
		// Start off the week - and don't let it go above 52, since that's the number of weeks in a year.
		$calendarGrid['weeks'][$nRow] = array(
			'days' => array(),
			'number' => $month_info['first_day']['week_num'] + $nRow + $nWeekAdjust
		);

		// Handle the dreaded "week 53", it can happen, but only once in a blue moon ;)
		if ($calendarGrid['weeks'][$nRow]['number'] == 53 && $nShift != 4 && $month_info['first_day_of_next_year'] < 4)
			$calendarGrid['weeks'][$nRow]['number'] = 1;

		// And figure out all the days.
		for ($nCol = 0; $nCol < 7; $nCol++)
		{
			$nDay = ($nRow * 7) + $nCol - $nShift + 1;

			if ($nDay < 1 || $nDay > $month_info['last_day']['day_of_month'])
				$nDay = 0;

			$date = sprintf('%04d-%02d-%02d', $year, $month, $nDay);

			$calendarGrid['weeks'][$nRow]['days'][$nCol] = array(
				'day' => $nDay,
				'date' => $date,
				'is_today' => $date == $today['date'],
				'is_first_day' => !empty($calendarOptions['show_week_num']) && (($month_info['first_day']['day_of_week'] + $nDay - 1) % 7 == $calendarOptions['start_day']),
				'holidays' => !empty($holidays[$date]) ? $holidays[$date] : array(),
				'events' => !empty($events[$date]) ? $events[$date] : array(),
				'birthdays' => !empty($bday[$date]) ? $bday[$date] : array()
			);
		}
	}

	// Set the previous and the next month's links.
	$calendarGrid['previous_calendar']['href'] = $scripturl . '?action=calendar;year=' . $calendarGrid['previous_calendar']['year'] . ';month=' . $calendarGrid['previous_calendar']['month'];
	$calendarGrid['next_calendar']['href'] = $scripturl . '?action=calendar;year=' . $calendarGrid['next_calendar']['year'] . ';month=' . $calendarGrid['next_calendar']['month'];

	return $calendarGrid;
}