/**
* Returns a boolean query param based on the current WP_Query
* @param array $query_vars
* @return string The resulting boolean query parameter
*/
public function wpToBooleanQuery($query_vars)
{
$meta_query = new WP_Meta_Query();
$meta_query->parse_query_vars($query_vars);
if (count($meta_query->queries) > 0) {
$expressionSet = new Lift_Expression_Set(strtolower($meta_query->relation));
foreach ($meta_query->queries as $subquery) {
if ($subquery['key'] == $this->meta_key) {
if ($subquery['compare'] === 'LIKE') {
foreach ((array) $subquery['value'] as $value) {
$expressionSet->addExpression(new Lift_Expression_Field($this->name, $value));
}
} elseif ($subquery['compare'] === 'NOT LIKE') {
$subExpression = new Lift_Expression_Set('NOT');
foreach ((array) $subquery['value'] as $value) {
$subExpression->addExpression(new Lift_Expression_Field($this->name, $value));
}
$expressionSet->addExpression($subExpression);
}
}
}
return $expressionSet;
}
return '';
}
protected function push()
{
if ($this->buffer_start !== null) {
// extract string from buffer start to current position
$buffer = substr($this->string, $this->buffer_start, $this->position - $this->buffer_start);
// clean buffer
$this->buffer_start = null;
// throw token into current scope
if (is_null($this->currentSet)) {
if (in_array($buffer, array('and', 'or', 'not'))) {
$this->currentSet = new Lift_Expression_Set($buffer);
} else {
list($name, $value) = explode(':', $buffer);
$is_str = false;
if ($value[0] === "'") {
$is_str = true;
$value = substr($value, 1, -1);
}
$this->currentSet = new Lift_Expression_Field($name, $value, $is_str);
}
} else {
list($name, $value) = explode(':', $buffer);
$is_str = false;
if ($value[0] === "'") {
$is_str = true;
$value = substr($value, 1, -1);
}
$exp = new Lift_Expression_Field($name, $value, $is_str);
$this->currentSet->addExpression($exp);
}
}
}