protected function _compile_wh($qb_key)
{
if (count($this->{$qb_key}) > 0) {
for ($i = 0, $c = count($this->{$qb_key}); $i < $c; $i++) {
// Is this condition already compiled?
if (is_string($this->{$qb_key}[$i])) {
continue;
} elseif ($this->{$qb_key}[$i]['escape'] === FALSE) {
$this->{$qb_key}[$i] = $this->{$qb_key}[$i]['condition'];
continue;
}
// Split multiple conditions
$conditions = preg_split('/((?:^|\\s+)AND\\s+|(?:^|\\s+)OR\\s+)/i', $this->{$qb_key}[$i]['condition'], -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
for ($ci = 0, $cc = count($conditions); $ci < $cc; $ci++) {
if (($op = $this->_get_operator($conditions[$ci])) === FALSE or !preg_match('/^(\\(?)(.*)(' . preg_quote($op, '/') . ')\\s*(.*(?<!\\)))?(\\)?)$/i', $conditions[$ci], $matches)) {
continue;
}
// $matches = array(
// 0 => '(test <= foo)', /* the whole thing */
// 1 => '(', /* optional */
// 2 => 'test', /* the field name */
// 3 => ' <= ', /* $op */
// 4 => 'foo', /* optional, if $op is e.g. 'IS NULL' */
// 5 => ')' /* optional */
// );
if (!empty($matches[4])) {
$this->_is_literal($matches[4]) or $matches[4] = $this->protect_identifiers(trim($matches[4]));
$matches[4] = ' ' . $matches[4];
}
$conditions[$ci] = $matches[1] . $this->protect_identifiers(trim($matches[2])) . ' ' . trim($matches[3]) . $matches[4] . $matches[5];
}
$this->{$qb_key}[$i] = implode('', $conditions);
}
return ($qb_key === 'qb_having' ? "\nHAVING " : "\nWHERE ") . implode("\n", $this->{$qb_key});
}
return '';
}
