<?php
/**
 * Elgg pagination
 *
 * @package Elgg
 * @subpackage Core
 *
 */

if (!isset($vars['offset'])) {
	$offset = 0;
} else {
	$offset = $vars['offset'];
}
if (!isset($vars['limit'])) {
	$limit = 10;
} else {
	$limit = (int)$vars['limit'];
}
if (!isset($vars['count'])) {
	$count = 0;
} else {
	$count = $vars['count'];
}
if (!isset($vars['word'])) {
	$word = "offset";
} else {
	$word = $vars['word'];
}
if (isset($vars['nonefound'])) {
	$nonefound = $vars['nonefound'];
} else {
	$nonefound = true;
}

// if displaying all entities, we do not need pagination
if ($limit == 0) {
	return true;
}

$totalpages = ceil($count / $limit);
$currentpage = ceil($offset / $limit) + 1;

//only display if there is content to paginate through or if we already have an offset
if (($count > $limit || $offset > 0) && get_context() != 'widget') {

	?>

	<div class="pagination">
	<?php

	if ($offset > 0) {

		$prevoffset = $offset - $limit;
		if ($prevoffset < 0) {
			$prevoffset = 0;
		}

		$prevurl = elgg_http_add_url_query_elements($vars['baseurl'], array($word => $prevoffset));

		echo "<a href=\"{$prevurl}\" class=\"pagination_previous\">&laquo; ". elgg_echo("previous") ."</a> ";
	}

	if ($offset > 0 || $offset < ($count - $limit)) {

		$currentpage = round($offset / $limit) + 1;
		$allpages = ceil($count / $limit);

		$i = 1;
		$pagesarray = array();
		while ($i <= $allpages && $i <= 4) {
			$pagesarray[] = $i;
			$i++;
		}
		$i = $currentpage - 2;
		while ($i <= $allpages && $i <= ($currentpage + 2)) {
			if ($i > 0 && !in_array($i,$pagesarray)) {
				$pagesarray[] = $i;
			}
			$i++;
		}
		$i = $allpages - 3;
		while ($i <= $allpages) {
			if ($i > 0 && !in_array($i,$pagesarray)) {
				$pagesarray[] = $i;
			}
			$i++;
		}

		sort($pagesarray);

		$prev = 0;
		foreach($pagesarray as $i) {
			if (($i - $prev) > 1) {
				echo "<span class=\"pagination_more\">...</span>";
			}

			$curoffset = (($i - 1) * $limit);
			$counturl = elgg_http_add_url_query_elements($vars['baseurl'], array($word => $curoffset));

			if ($curoffset != $offset) {
				echo " <a href=\"{$counturl}\" class=\"pagination_number\">{$i}</a> ";
			} else {
				echo "<span class=\"pagination_currentpage\">{$i}</span>";
			}
			$prev = $i;

		}
	}

	if ($offset < ($count - $limit)) {

		$nextoffset = $offset + $limit;
		if ($nextoffset >= $count) {
			$nextoffset--;
		}

		$nexturl = elgg_http_add_url_query_elements($vars['baseurl'], array($word => $nextoffset));

		echo " <a href=\"{$nexturl}\" class=\"pagination_next\">" . elgg_echo("next") . " &raquo;</a>";

	}

	?>
	<div class="clearfloat"></div>
	</div>
	<?php
} // end of pagination check if statement
