Craft\AmForms_ExportsService::saveExport PHP Method

    public function saveExport(AmForms_ExportModel $export)
    {
        $isNewExport = !$export->id;
        // Get the export record
        if ($export->id) {
            $exportRecord = AmForms_ExportRecord::model()->findById($export->id);
            if (!$exportRecord) {
                throw new Exception(Craft::t('No export exists with the ID “{id}”.', array('id' => $export->id)));
            }
        } else {
            $exportRecord = new AmForms_ExportRecord();
        }
        // Get the form
        $form = craft()->amForms_forms->getFormById($export->formId);
        if (!$form) {
            throw new Exception(Craft::t('No form exists with the ID “{id}”.', array('id' => $export->formId)));
        }
        // Export attributes
        if ($isNewExport) {
            // Do we need to get the total submissions to export?
            if (!$export->submissions && !$export->startRightAway) {
                // Set total records to export
                $export->total = craft()->db->createCommand()->select('COUNT(*)')->from('amforms_submissions')->where('formId=:formId', array(':formId' => $export->formId))->queryScalar();
            }
            // We need to create an export file when we already have the submissions
            // Or when we have no manually given submissions and don't export right way
            if (!$export->startRightAway || $export->submissions) {
                // Create a new export file
                $export->file = $this->_createExportFile($export, $form);
            }
        }
        $exportRecord->setAttributes($export->getAttributes(), false);
        // Validate the attributes
        $exportRecord->validate();
        $export->addErrors($exportRecord->getErrors());
        if (!$export->hasErrors()) {
            if ($export->startRightAway) {
                // Get max power
                craft()->config->maxPowerCaptain();
                // Run the export!
                return $this->runExport($export);
            } else {
                // Save the export!
                $result = $exportRecord->save(false);
                // Skip validation now
                // Start export task?
                if ($result && $isNewExport) {
                    // Start task
                    $params = array('exportId' => $exportRecord->id, 'batchSize' => craft()->amForms_settings->getSettingsValueByHandleAndType('exportRowsPerSet', AmFormsModel::SettingExport, 100));
                    craft()->tasks->createTask('AmForms_Export', Craft::t('{form} export', array('form' => $form->name)), $params);
                    // Notify user
                    craft()->userSession->setNotice(Craft::t('Export started.'));
                }
                return $result;
            }
        }
        return false;
    }