/**
* Generic callback used to call callback methods for form validation.
*
* @param string the value to be validated
* @param string a comma separated string that contains the model name,
* method name and any optional values to send to the method
* as a single parameter.
*
* - First value is the external class type (library,model)
* - Second value is the name of the class.
* - Third value is the name of the method.
* - Any additional values are values to be
* sent in an array to the method.
*
* EXAMPLE RULE FOR CALLBACK IN MODEL:
* external_callbacks[model,model_name,some_method,some_string,another_string]
*
* EXAMPLE RULE FOR CALLBACK IN LIBRARY:
* external_callbacks[library,library_name,some_method,some_string,another_string]
*/
public function external_callbacks( $postdata, $param )
{
$param_values = explode( ',', $param );
// Load the model or library holding the callback
$class_type = $param_values[0];
$class_name = $param_values[1];
$this->CI->load->$class_type( $class_name );
// Apply method name to variable for easy usage
$method = $param_values[2];
// Check to see if there are any additional values to send as an array
if( count( $param_values ) > 3 )
{
// Remove the first three elements in the param_values array
$argument = array_slice( $param_values, 3 );
}
// Do the actual validation in the external callback
if( isset( $argument ) )
{
$callback_result = $this->CI->$class_name->$method( $postdata, $argument );
}
else
{
$callback_result = $this->CI->$class_name->$method( $postdata );
}
return $callback_result;
}
// -----------------------------------------------------------------------
