protected function parse_every($type = 'every', $opening_tag, $condition_contents, $exact_match, $template_contents, $content_vars, $index_in_group)
{
$tag = new PerchXMLTag($opening_tag);
$positive = $condition_contents;
$negative = '';
// else condition
if (strpos($condition_contents, 'perch:else') > 0) {
$parts = preg_split('/<perch:else\\s*\\/>/', $condition_contents);
if (is_array($parts) && count($parts) > 1) {
$positive = $parts[0];
$negative = $parts[1];
}
}
if ($tag->count()) {
$count = (int) $tag->count();
$offset = 0;
if ($count !== 0 && $index_in_group % $count == 0) {
$template_contents = str_replace($exact_match, $positive, $template_contents);
} else {
$template_contents = str_replace($exact_match, $negative, $template_contents);
}
} elseif ($tag->nth_child()) {
$nth_child = $tag->nth_child();
$nths = array(0);
if (is_numeric($nth_child)) {
$nths[] = (int) $nth_child;
} else {
$multiplier = 0;
$offset = 0;
switch ($nth_child) {
case 'odd':
$multiplier = 2;
$offset = 1;
break;
case 'even':
$multiplier = 2;
$offset = 0;
break;
default:
$s = '/([\\+-]{0,1}[0-9]*)n([\\+-]{0,1}[0-9]+){0,1}/';
if (preg_match($s, $tag->nth_child(), $matches)) {
if (isset($matches[1]) && $matches[1] != '' && $matches[1] != '-') {
$multiplier = (int) $matches[1];
} else {
if ($matches[1] == '-') {
$multiplier = -1;
} else {
$multiplier = 1;
}
}
if (isset($matches[2])) {
$offset = (int) $matches[2];
} else {
$offset = 0;
}
}
break;
}
$n = 0;
if ($multiplier > 0) {
while ($n < 1000 && max($nths) <= $index_in_group) {
$nths[] = $multiplier * $n + $offset;
$n++;
}
} else {
while ($n < 1000) {
$nth = $multiplier * $n + $offset;
if ($nth > 0) {
$nths[] = $nth;
} else {
break;
}
$n++;
}
}
}
if (PerchUtil::count($nths)) {
if (in_array($index_in_group, $nths)) {
$template_contents = str_replace($exact_match, $positive, $template_contents);
} else {
$template_contents = str_replace($exact_match, $negative, $template_contents);
}
} else {
$template_contents = str_replace($exact_match, $negative, $template_contents);
}
} else {
// No count or nth-child, so scrub it.
$template_contents = str_replace($exact_match, $negative, $template_contents);
}
return $template_contents;
}
