<?php

global $HOMEDIR;
include_once $HOMEDIR . '/config/consts.php';

function initCache() {
	global $newsBeginYear, $eventsBeginYear;
	initNewsCache($newsBeginYear);
	initEventsCache($eventsBeginYear);	
}

function initCacheFor($year) {
	initNewsCache($year);
	initEventsCache($year);	
}

function initNewsCache($year) {
	global $newsAnnouncementBoardId;	
	initBoardCache($newsAnnouncementBoardId, $year, "pt");
	initBoardCache($newsAnnouncementBoardId, $year, "en");
}

function initEventsCache($year) {
	global $eventsAnnouncementBoardId;
	initBoardCache($eventsAnnouncementBoardId, $year, "pt");
	initBoardCache($eventsAnnouncementBoardId, $year, "en");
}

function initBoardCache($board, $endYear, $currentLocale) {
	$currentYear = date("Y");
	for ($i = $currentYear; $i >= $endYear; $i--) {
		for ($j = 1; $j <= 12; $j++) {
			refreshCachedRequest($j, $i, $board, $currentLocale);
			if (date("Y") == $i && date("n") == $j) {
				break;
			}
		}
	}
}

function refreshCachedRequest($month, $year, $board, $currentLocale) {
	$request = retreiveMonthFromFenix($month, $year, $board, $currentLocale);
	if ($request != null && $request != "") {
		$request = utf8_encode($request);
		$path = cacheFilePathFor($month, $year, $board, $currentLocale);
		writeToFile($path, $request);
	}
}

function retreiveMonthFromFenix($month, $year, $board, $currentLocale) {
	global $fenixAnnouncementExportURL;
	$contents = '';
	$handle = @fopen($fenixAnnouncementExportURL . '?method=getAnnouncements&announcementBoardId=' . $board . '&selectedYear=' . $year . '&selectedMonth=' . $month . '&language=' . $currentLocale, "r");
	if ($handle) {
		while (!feof($handle)) {
			$contents .= fread($handle, 8192);
		}
		fclose($handle);
	}
	return $contents;
}

function cacheFilePathFor($month, $year, $board, $currentLocale) {
	return filePathPrefixFor($month, $year, $board, $currentLocale) . '.cache';
}

function filePathPrefixFor($month, $year, $board, $currentLocale) {
	global $HOMEDIR;
	$fullMonth = $month >= 10 ? $month : '0' . $month;
	return $HOMEDIR . '/newscache/' . $board . '.' . $fullMonth . '.' . $year . '.' . $currentLocale;
}

function writeToFile($path, $content) {
	$file = fopen($path, 'w+'); // binary update mode
	if (flock($file, LOCK_EX)) { // do an exclusive lock
		rewind($file);
		fwrite($file, $content);
		fflush($file);
		ftruncate($file, ftell($file));
   		flock($file, LOCK_UN); // release the lock
	}
	fclose($file);
}

?>