/**
* special method to build events taking place relative to easter
*
* @param Tx_CzSimpleCal_Utility_DateTime $start
* @param Tx_CzSimpleCal_Utility_DateTime $end
* @param Tx_CzSimpleCal_Utility_DateTime $until
* @see http://de.php.net/manual/en/function.easter-days.php
*/
protected function buildEaster($start, $end, $until)
{
if (!function_exists('easter_days') || !function_exists('easter_date')) {
throw new RuntimeException('The function easter_days() or easter_date() is not available in your PHP installation.
The binaries were probably not compiled using --enable-calendar. Contact your
server administrator to fix this.');
}
/**
* calculate the day offset
*/
/**
* the day of the year of the date given as start
* 0 is the 1st January
*
* @var integer
*/
$dayOfYear = date('z', $start->getTimestamp());
$year = date('Y', $start->getTimestamp());
$dayOfYearEaster = $this->getDayOfYearForEasterSunday($year);
/**
* a string for DateTime->modify() to jump from easter sunday
* to the desired date
* null if no jumping required
*
* @var string|null
*/
$diffDaysStart = $dayOfYear - $dayOfYearEaster;
$diffDaysStart = sprintf('%+d days', $diffDaysStart);
/**
* a string for DateTime->modify() to jump from easter sunday
* to the desired date
* null if no jumping required
*
* @var string|null
*/
$diffDaysEnd = date('z', $end->getTimestamp()) - $dayOfYearEaster;
$diffDaysEnd = sprintf('%+d days', $diffDaysEnd);
while ($until >= $start) {
$this->timeline->add(array('start' => $start->getTimestamp(), 'end' => $end->getTimestamp()));
// calculate dates for the next year
$year = $year + 1;
/**
* timestamp for easter sunday of a given year
* @var integer
*/
$easter = easter_date($year);
$start->setDate($year, date('n', $easter), date('j', $easter));
if (!is_null($diffDaysStart)) {
$start->modify($diffDaysStart);
}
$end->setDate($year, date('n', $easter), date('j', $easter));
if (!is_null($diffDaysEnd)) {
$end->modify($diffDaysEnd);
}
}
}
/**
* Render the supplied unix Tx_CzSimpleCal_Utility_DateTime in a localized human-readable string.
*
* @param Tx_CzSimpleCal_Utility_DateTime $start
* @param Tx_CzSimpleCal_Utility_DateTime $end
* @return string formatted output
* @author Christian Zenker <*****@*****.**>
*/
public function render($start, $end)
{
if ($start->format('Y') != $end->format('Y')) {
return $this->getLL('timespan.from') . ' ' . strftime($this->getLL('timespan.format.else.start'), $start->getTimestamp()) . ' ' . $this->getLL('timespan.to') . ' ' . strftime($this->getLL('timespan.format.else.end'), $end->getTimestamp());
} elseif ($start->format('m') != $end->format('m')) {
return $this->getLL('timespan.from') . ' ' . strftime($this->getLL('timespan.format.sameYear.start'), $start->getTimestamp()) . ' ' . $this->getLL('timespan.to') . ' ' . strftime($this->getLL('timespan.format.sameYear.end'), $end->getTimestamp());
} elseif ($start->format('d') != $end->format('d')) {
return $this->getLL('timespan.from') . ' ' . strftime($this->getLL('timespan.format.sameMonth.start'), $start->getTimestamp()) . ' ' . $this->getLL('timespan.to') . ' ' . strftime($this->getLL('timespan.format.sameMonth.end'), $end->getTimestamp());
} else {
return $this->getLL('timespan.on') . ' ' . strftime($this->getLL('timespan.format.sameDay'), $start->getTimestamp());
}
}
/**
* special method to build events taking place on odd or even weeks
*
* @param Tx_CzSimpleCal_Utility_DateTime $start
* @param Tx_CzSimpleCal_Utility_DateTime $end
* @param Tx_CzSimpleCal_Utility_DateTime $until
*/
protected function buildOddEven($start, $end, $until)
{
$week = $start->format('W') % 2;
while ($until >= $start) {
$this->timeline->add(array('start' => $start->getTimestamp(), 'end' => $end->getTimestamp()));
$start->modify('+2 week');
$end->modify('+2 week');
// take care of year switches
if ($start->format('W') % 2 !== $week) {
$start->modify('-1 week');
$end->modify('-1 week');
}
}
}
/**
* find all events matching some settings and count them
*
* @param $settings
* @ugly doing dozens of database requests
* @return array
*/
protected function doCountAllWithSettings($settings = array())
{
if (!isset($settings['groupBy'])) {
return $this->setupSettings($settings)->count();
} else {
$output = array();
if ($settings['groupBy'] === 'day') {
$step = '+1 day';
} elseif ($settings['groupBy'] === 'week') {
$step = '+1 week';
} elseif ($settings['groupBy'] === 'month') {
$step = '+1 month';
} elseif ($settings['groupBy'] === 'year') {
$step = '+1 year';
} else {
$step = null;
}
$startDate = new Tx_CzSimpleCal_Utility_DateTime('@' . $settings['startDate']);
$startDate->setTimezone(new DateTimeZone(date_default_timezone_get()));
$endDate = $settings['endDate'];
while ($startDate->getTimestamp() < $endDate) {
if ($step === null) {
$tempEndDate = null;
} else {
$tempEndDate = clone $startDate;
$tempEndDate->modify($step . ' -1 second');
}
$output[] = array('date' => $startDate->format('c'), 'count' => $this->doCountAllWithSettings(array_merge($settings, array('startDate' => $startDate->format('U'), 'endDate' => $tempEndDate ? $tempEndDate->format('U') : null, 'groupBy' => null))));
if ($step === null) {
break;
} else {
$startDate->modify($step);
}
}
return $output;
}
}