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<?php
# Movable Type (r) Open Source (C) 2001-2008 Six Apart, Ltd.
# This program is distributed under the terms of the
# GNU General Public License, version 2.
#
# $Id: block.mtifisancestor.php 1800 2008-04-08 06:36:25Z takayama $
function smarty_block_mtifisancestor($args, $content, &$ctx, &$repeat) {
$localvars = array('conditional', 'else_content');
if (!isset($content)) {
require_once("MTUtil.php");
$cat = get_category_context($ctx, $class);
$ctx->localize($localvars);
$children = $ctx->mt->db->fetch_categories(array('label' => $args['child'], 'blog_id' => $ctx->stash('blog_id'), 'show_empty' => 1));
$ret = false;
if ($children) {
foreach ($children as $child) {
if (_is_ancestor($cat, $child, $ctx)) {
$ret = true;
break;
}
}
unset($child);
}
$ctx->stash('else_content', null);
$ctx->stash('conditional', $ret ? 1 : 0);
} else {
if (!$ctx->stash('conditional'))
$content = $ctx->stash('else_content');
$ctx->restore($localvars);
}
return $content;
}
function _is_ancestor($cat, $possible_child, $ctx) {
# Catch the different blog edge case
if ($cat['category_blog_id'] != $possible_child['category_blog_id'])
return 0;
if ($cat['category_id'] == $possible_child['category_id'])
return 1;
# Keep having the child bump up one level in the hierarchy
# to see if it ever reaches the current category
# (more efficient than descending from the current category
# as the children lists do not need to be calculated)
while ($id = $possible_child['category_parent']) {
$possible_child = $ctx->mt->db->fetch_category($id);
if ($cat['category_id'] == $id)
return 1;
}
# Looks like we didn't find it
return 0;
}
?>
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