/**
* Executes command from GET-filter.
* Command must be represented as method of this class named as "command".$commandName
* This method MUST return String WHERE-clause for passed arguments
* @param $command
* @param $field
* @param $arguments
* @return string
* @throws \Exception
*/
protected function exec($command, $field, $arguments)
{
$method = 'command' . ucfirst($command);
if (method_exists($this, $method)) {
if (is_array($field)) {
$field = implode(self::CMD_SEPARATOR, $field);
}
$field = $this->escaper->field($field);
if (is_array($arguments)) {
for ($i = 0; $i < count($arguments); $i++) {
$arguments[$i] = $this->escaper->value($arguments[$i]);
}
} else {
$arguments = $this->escaper->value($arguments);
}
return '(' . $this->{$method}($this->table . '.' . $field, $arguments) . ')';
} else {
// TODO: throw valid Exception
throw new \Exception("Filter " . $command . " not supported");
}
}
