/**
* Appends display field names to select statement.
* @param string $selectStatement
* @param DisplayField $displayField
* @return string
*/
public function constructSelectClauseForDisplayField($selectStatement, $displayField)
{
$clause = $displayField->getName();
if (KeyHandler::keyExists() && $displayField->getIsEncrypted()) {
$clause = 'AES_DECRYPT(UNHEX(' . $displayField->getName() . '),"' . KeyHandler::readKey() . '")';
}
if ($displayField->getIsValueList()) {
$clause = "GROUP_CONCAT(DISTINCT " . $clause . " SEPARATOR '|\\n|' ) ";
}
$fieldAlias = $displayField->getFieldAlias();
if (!empty($fieldAlias)) {
$clause = $clause . " AS " . $fieldAlias;
}
if (empty($selectStatement)) {
$selectStatement = $clause;
} else {
$selectStatement .= ',' . $clause;
}
return $selectStatement;
}