/**
* Remove a facet from the parameters.
*
* @param string $field Facet field
* @param string $value Facet value
* @param bool $escape Should we escape the string for use in the view?
* @param string $operator Facet type to add (AND, OR, NOT)
* @param array $paramArray Optional array of parameters to use instead of
* getParamArray()
*
* @return string
*/
public function removeFacet($field, $value, $escape = true, $operator = 'AND', $paramArray = null)
{
$params = is_null($paramArray) ? $this->getParamArray() : $paramArray;
// Account for operators:
if ($operator == 'NOT') {
$field = '-' . $field;
} else {
if ($operator == 'OR') {
$field = '~' . $field;
}
}
$fieldAliases = $this->params->getAliasesForFacetField($field);
// Remove the filter:
$newFilter = [];
if (isset($params['filter']) && is_array($params['filter'])) {
foreach ($params['filter'] as $current) {
list($currentField, $currentValue) = $this->params->parseFilter($current);
if (!in_array($currentField, $fieldAliases) || $currentValue != $value) {
$newFilter[] = $current;
}
}
}
if (empty($newFilter)) {
unset($params['filter']);
} else {
$params['filter'] = $newFilter;
}
// Clear page:
unset($params['page']);
return '?' . $this->buildQueryString($params, $escape);
}
