forked from extern/egroupware
228 lines
7.2 KiB
PHP
228 lines
7.2 KiB
PHP
<?php
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/**
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* EGroupware - Calendar holidays
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*
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* @link http://www.egroupware.org
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* @package calendar
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @copyright (c) 2016 by RalfBecker-At-outdoor-training.de
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @version $Id$
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*/
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use EGroupware\Api;
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/**
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* Calendar holidays
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*
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* Holidays are read from:
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* - a given iCal URL or
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* - json file with 2-digit iso country-code: URL pairs is read from https://community.egroupware.org or
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* - json file is read from /calendar/setup/ical_holiday_urls.json
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*
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* Holidays are cached on tree or instance level, later for custom urls.
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* As fetching and parsing iCal files is expensive, we always render them
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* from previous (requested) year until next 5 years.
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*/
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class calendar_holidays
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{
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const URL_CACHE_TIME = 864000;
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const URL_FAIL_CACHE_TIME = 300;
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const EGW_HOLIDAY_URL = 'https://community.egroupware.org/egw';
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const HOLIDAY_PATH = '/calendar/setup/ical_holiday_urls.json';
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const HOLIDAY_CACHE_TIME = 864000; // 10 days
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/**
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* Read holidays for given country/url and year
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*
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* @param string $country 2-digit iso country code or URL
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* @param int $year =null default current year
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* @return array of Ymd => array of array with values for keys 'occurence','month','day','name', (commented out) 'title'
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*/
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public static function read($country, $year=null)
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{
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if (!$year) $year = (int)Api\DateTime::to('now', 'Y');
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$level = self::is_url($country) ? Api\Cache::INSTANCE : Api\Cache::TREE;
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$holidays = Api\Cache::getCache($level, __CLASS__, $country.':'.$year);
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// if we dont find holidays in cache, we render from previous year until next 5 years
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if (!isset($holidays) && ($years = self::render($country, $year-1, $year+5)))
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{
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foreach($years as $y => $data)
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{
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Api\Cache::setCache($level, __CLASS__, $country.':'.$y, $data, self::HOLIDAY_CACHE_TIME);
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}
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$holidays = $years[$year];
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}
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return (array)$holidays;
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}
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/**
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* Fetch holiday iCal and convert it to usual holiday format
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*
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* @param string $country 2-digit iso country code or URL
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* @param int $year =null default current year
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* @param int $until_year =null default, fetch only one year, if given result is indexed additional by year
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* @return array of Ymd => array of array with values for keys 'occurence','month','day','name', (commented out) 'title'
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*/
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public static function render($country, $year=null, $until_year=null)
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{
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if (!$year) $year = (int)Api\DateTime::to('now', 'Y');
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$end_year = $until_year && $year < $until_year ? $until_year : $year;
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$starttime = microtime(true);
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if (!($holidays = self::fetch($country)))
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{
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return array();
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}
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$years = array();
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foreach($holidays as $event)
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{
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$start = new Api\DateTime($event['start']);
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$end = new Api\DateTime($event['end']);
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if ($start->format('Y') > $end_year) continue;
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if ($end->format('Y') < $year && !$event['recur_type']) continue;
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// recuring events
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if ($event['recur_type'])
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{
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// calendar_rrule limits no enddate, to 5 years
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if (!$event['recur_enddate']) $event['recur_enddate'] = (1+$end_year).'0101';
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$rrule = calendar_rrule::event2rrule($event);
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if ($rrule->enddate && $rrule->enddate->format('Y') < $year) continue;
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foreach($rrule as $rtime)
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{
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if (($y = (int)$rtime->format('Y')) < $year) continue;
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if ($y > $end_year) break;
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$ymd = (int)$rtime->format('Ymd');
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$years[$y][(string)$ymd][] = array(
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'day' => $ymd % 100,
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'month' => ($ymd / 100) % 100,
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'occurence' => $y,
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'name' => $event['title'],
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//'title' => $event['description'],
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);
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}
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}
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else
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{
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$end_ymd = (int)$end->format('Ymd');
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while(($ymd = (int)$start->format('Ymd')) <= $end_ymd)
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{
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$y = (int)$start->format('Y');
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$years[$y][(string)$ymd][] = array(
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'day' => $ymd % 100,
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'month' => ($ymd / 100) % 100,
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'occurence' => $y,
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'name' => $event['title'],
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//'title' => $event['description'],
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);
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$start->add('1day');
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}
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}
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}
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foreach($years as $y => &$data)
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{
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ksort($data);
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}
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error_log(__METHOD__."('$country', $year, $end_year) took ". number_format(microtime(true)-$starttime, 3).'s to fetch '.count(call_user_func_array('array_merge', $years)).' events');
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unset($starttime);
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return $until_year ? $years : $years[$year];
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}
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protected static function is_url($url)
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{
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return $url[0] == '/' || strpos($url, '://') !== false;
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}
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/**
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* Fetch iCal for given country
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*
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* @param string $country 2-digit iso country code or URL
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* @return array|Iterator parsed events
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*/
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protected static function fetch($country)
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{
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if (!($url = self::is_url($country) ? $country : self::ical_url($country)))
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{
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error_log("No holiday iCal for '$country'!");
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return array();
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}
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if (!($f = fopen($url, 'r', false, Api\Framework::proxy_context())))
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{
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error_log("Can NOT open holiday iCal '$url' for country '$country'!");
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return array();
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}
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// php does not automatic gzip decode, but it does not accept that in request headers
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// iCloud eg. always gzip compresses: https://p16-calendars.icloud.com/holidays/au_en-au.ics
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foreach($http_response_header as $h)
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{
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if (preg_match('/^content-encoding:.*gzip/i', $h))
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{
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stream_filter_append($f, 'zlib.inflate', STREAM_FILTER_READ, array('window' => 15|16));
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break;
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}
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}
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$parser = new calendar_ical();
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if (!($icals = $parser->icaltoegw($f)))
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{
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error_log("Error parsing holiday iCal '$url' for country '$country'!");
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return array();
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}
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return $icals;
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}
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/**
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* Get iCal url for holidays of given country
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*
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* We first try to fetch urls from https://community.egroupware.org and if that fails we use the local one.
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*
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* @param string $country
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* @return string|boolean|null string with url, false if we cant load urls, NULL if $country is not included
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*/
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protected static function ical_url($country)
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{
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$urls = Api\Cache::getTree(__CLASS__, 'ical_holiday_urls');
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if (!isset($urls))
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{
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if (!($json = file_get_contents(self::EGW_HOLIDAY_URL.self::HOLIDAY_PATH, false,
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Api\Framework::proxy_context(null, null, array('timeout' => 1)))))
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{
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$json = file_get_contents(EGW_SERVER_ROOT.self::HOLIDAY_PATH);
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}
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if (!$json || !($urls = json_decode($json, true)))
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{
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error_log(__METHOD__."() cant read ical_holiday_urls.json!");
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$urls = false;
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}
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Api\Cache::setTree(__CLASS__, 'ical_holiday_urls', $urls, $urls ? self::URL_CACHE_TIME : self::URL_FAIL_CACHE_TIME);
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}
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return $urls[$country];
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}
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}
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// some tests when url is called direct
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if (isset($_SERVER['SCRIPT_FILENAME']) && $_SERVER['SCRIPT_FILENAME'] == __FILE__)
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{
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$GLOBALS['egw_info'] = array(
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'flags' => array(
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'currentapp' => 'login',
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)
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);
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include('../../header.inc.php');
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$country = !empty($_GET['country']) && preg_match('/^[A-Z]{2}$/i', $_GET['country']) ? strtoupper($_GET['country']) : 'DE';
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$year = !empty($_GET['year']) && (int)$_GET['year'] > 2000 ? (int)$_GET['year'] : (int)date('Y');
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$year_until = !empty($_GET['year_until']) && (int)$_GET['year_until'] >= $year ? (int)$_GET['year_until'] : $year;
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Api\Header\Content::type('holidays-'.$country.'.txt', 'text/plain', 0, true, false);
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print_r(calendar_holidays::render($country, $year, $year_until));
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}
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