<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/announcements/utils/cache.php';

class Announcement {

	var $creationDate;
	var $referedSubjectBegin;
	var $referedSubjectEnd;
	var $publicationBegin;
	var $publicationEnd;
	var $lastModification;
	var $subject;
	var $keywords;
	var $body;
	var $excerpt;
	var $author;
	var $authorEmail;
	var $visible;
	var $place;
	var $id;

	function Announcement($aa) {
		foreach ($aa as $k => $v) {
			$this-> $k = utf8_decode($aa[$k]);
		}
	}

	function translateStringToTime($string) {
		$components = split(' ', $string);
		$date = $components[0];
		$hour = $components[1];
		$dateComponents = split('/', $date);
		$day = $dateComponents[0];
		$month = $dateComponents[1];
		$year = $dateComponents[2];
		$hourComponents = split(':', $hour);
		$hour = $hourComponents[0];
		$minutes = $hourComponents[1];
		return mktime($hour, $minutes, 0, $month, $day, $year);
	}

	function getCreationDate() {
		if (isset ($this->creationDate) && (strcmp($this->creationDate, "") != 0)) {
			return $this->translateStringToTime($this->creationDate);
		}
	}

	function getReferedSubjectBegin() {
		if (isset ($this->referedSubjectBegin) && (strcmp($this->referedSubjectBegin, "") != 0)) {
			return $this->translateStringToTime($this->referedSubjectBegin);
		}
	}

	function getReferedSubjectEnd() {
		if (isset ($this->referedSubjectEnd) && (strcmp($this->referedSubjectEnd, "") != 0)) {
			return $this->translateStringToTime($this->referedSubjectEnd);
		}
	}

	function getPublicationBegin() {
		if (isset ($this->publicationBegin) && (strcmp($this->publicationBegin, "") != 0)) {
			return $this->translateStringToTime($this->publicationBegin);
		}
	}

	function getPublicationEnd() {
		if (isset ($this->publicationEnd) && (strcmp($this->publicationEnd, "") != 0)) {
			return $this->translateStringToTime($this->publicationEnd);
		}
	}
	
	function hasAuthor() {
		return isset($this->author) && (strcmp($this->author, "") != 0);
	}
	
	function hasPlace() {
		return isset($this->place) && (strcmp($this->place, "") != 0);
	}
}

function readAnnouncementDatabase($data) {

	if (!isset ($data) || strcmp($data, "") == 0) {
		return array ();
	}

	// read the XML database
	$parser = xml_parser_create();
	xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
	xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
	xml_parse_into_struct($parser, $data, $values, $tags);
	xml_parser_free($parser);

	// loop through the structures
	foreach ($tags as $key => $val) {
		if ($key == "net.sourceforge.fenixedu.presentationTier.Action.externalServices.AnnouncementDTO") {
			$molranges = $val;
			for ($i = 0; $i < count($molranges); $i += 2) {
				$offset = $molranges[$i] + 1;
				$len = $molranges[$i +1] - $offset;
				$tdb[] = parseMol(array_slice($values, $offset, $len));
			}
		} else {
			continue;
		}
	}
	return $tdb;
}

function parseMol($mvalues) {
	for ($i = 0; $i < count($mvalues); $i++) {
		@ $mol[$mvalues[$i]["tag"]] = $mvalues[$i]["value"];
	}
	return new Announcement($mol);
}

function eventsComparator($a1, $a2) {
	$a1ReferedSubjectBegin = $a1->getReferedSubjectBegin();
	$a2ReferedSubjectBegin = $a2->getReferedSubjectBegin();
	$now = time();
	if (isset ($a1ReferedSubjectBegin) && isset ($a2ReferedSubjectBegin)) {
		if ($a1ReferedSubjectBegin < $now)
			return 1;
		if ($a2ReferedSubjectBegin < $now)
			return -1;
		return $a1ReferedSubjectBegin - $a2ReferedSubjectBegin;
	}
	return 1;
}

function newsComparator($a1, $a2) {
	return $a2->getCreationDate() - $a1->getCreationDate();
}

function publishedAnnouncementFilter($a) {
	$today = time();
	$announcementPublicationEnd = $a->getPublicationEnd();
	$announcementPublicationBegin = $a->getPublicationBegin();
	$announcementCreationDate = $a->getCreationDate();

	//return (!isset ($announcementPublicationBegin) || $announcementPublicationBegin <= $today) && ($today >= $announcementCreationDate);
	return (((!isset ($announcementPublicationEnd) || $announcementPublicationEnd >= $today)) && ((!isset ($announcementPublicationBegin) || $announcementPublicationBegin <= $today)) && ($today >= $announcementCreationDate));
}

function sameAnnouncement($a1, $a2) {
	return (strcmp($a1->id, $a2->id) == 0);
}

function arrayContainsAnnouncement($array, $annouccement) {
	$result = false;
	for ($i = 0; $i < count($array); $i++) {
		if (sameAnnouncement($annouccement, $array[$i])) {
			$result = true;
			break;
		}
	}
	return $result;
}

function removeAnnouncementDuplicates($array) {
	$newArray = array ();
	for ($i = 0; $i < count($array); $i++) {
		if (!arrayContainsAnnouncement($newArray, $array[$i])) {
			$newArray[count($newArray)] = $array[$i];
		}
	}

	return $newArray;
}

function getLatestActiveAnnouncements($board, $howMany, $sorter, $since) {

	$currentYear = date("Y");
	$currentMonth = date("n");
	$contents = getAnnouncements($currentMonth, $currentYear, $board);
	$contents = removeSuccessString($contents);
	$announcements = readAnnouncementDatabase($contents);
	$announcements = array_filter($announcements, "publishedAnnouncementFilter");
	$i = 0;
	
	if (count($announcements) < $howMany) {
		$previousContentsMonth = $currentMonth;
	}
	$previousContentsYear = $currentYear;
	while (count($announcements) < $howMany && $previousContentsYear >= $since) {
		
		$previousContentsMonth--;
		if ($previousContentsMonth == 0) {
			$previousContentsMonth = 12;
			$previousContentsYear--;
		}
		
		$moreContents = getAnnouncements($previousContentsMonth, $previousContentsYear, $board);
		$moreContents = removeSuccessString($moreContents);
		$moreAnnouncements = readAnnouncementDatabase($moreContents);
		$moreAnnouncements = array_filter($moreAnnouncements, "publishedAnnouncementFilter");
		$announcements = array_merge($announcements, $moreAnnouncements);
		$announcements = removeAnnouncementDuplicates($announcements);
		if ($i == 3) {
			break;
		}
		$i++;
	}

	usort($announcements, $sorter);
	$announcements = array_slice($announcements, 0, $howMany);
	return $announcements;

}

function getAnnouncementsFor($month, $year, $board) {
	$contents = getAnnouncements($month, $year, $board);
	$contents = removeSuccessString($contents);
	$announcements = readAnnouncementDatabase($contents);

	return $announcements;
}
?>