/**
* Load the list of sample attributes into a static variable.
* By maintaining a single list of attributes we can track which have already
* been output.
* @param array $readAuth Read authorisation tokens.
* @param integer $surveyId ID of the survey to load sample attributes for.
*/
protected static function loadSmpAttrs($readAuth, $surveyId)
{
if (!isset(self::$smpAttrs)) {
$attrArgs = array('valuetable' => 'sample_attribute_value', 'attrtable' => 'sample_attribute', 'fieldprefix' => 'smpAttr', 'extraParams' => $readAuth, 'survey_id' => $surveyId);
if (!empty($args['sample_method_id'])) {
// Select only the custom attributes that are for this sample method.
$attrOpts['sample_method_id'] = $args['sample_method_id'];
}
self::$smpAttrs = data_entry_helper::getAttributes($attrArgs, false);
}
}
