silverstripe-framework/admin/code/MemberImportForm.php

<?php

namespace SilverStripe\Admin;

use SilverStripe\Security\Group;
use SilverStripe\Security\MemberCsvBulkLoader;
use SilverStripe\Forms\LiteralField;
use SilverStripe\Forms\FileField;
use SilverStripe\Forms\FieldList;
use SilverStripe\Forms\FormAction;
use SilverStripe\Forms\RequiredFields;
use SilverStripe\Forms\Form;
use SilverStripe\View\Requirements;

/**
 * Imports {@link Member} records by CSV upload, as defined in
 * {@link MemberCsvBulkLoader}.
 */
class MemberImportForm extends Form {

	/**
	 * @var Group Optional group relation
	 */
	protected $group;

	public function __construct($controller, $name, $fields = null, $actions = null, $validator = null) {
		if(!$fields) {
			$helpHtml = _t(
				'MemberImportForm.Help1',
				'<p>Import users in <em>CSV format</em> (comma-separated values).'
				. ' <small><a href="#" class="toggle-advanced">Show advanced usage</a></small></p>'
			);
			$helpHtml .= _t(
				'MemberImportForm.Help2',
				'<div class="advanced">'
				. '<h4>Advanced usage</h4>'
				. '<ul>'
				. '<li>Allowed columns: <em>%s</em></li>'
				. '<li>Existing users are matched by their unique <em>Code</em> property, and updated with any new values from '
				. 'the imported file.</li>'
				. '<li>Groups can be assigned by the <em>Groups</em> column. Groups are identified by their <em>Code</em> property, '
				. 'multiple groups can be separated by comma. Existing group memberships are not cleared.</li>'
				. '</ul>'
				. '</div>'
			);

			$importer = new MemberCsvBulkLoader();
			$importSpec = $importer->getImportSpec();
			$helpHtml = sprintf($helpHtml, implode(', ', array_keys($importSpec['fields'])));

			$fields = new FieldList(
				new LiteralField('Help', $helpHtml),
				$fileField = new FileField(
					'CsvFile',
					_t(
						'SecurityAdmin_MemberImportForm.FileFieldLabel',
						'CSV File <small>(Allowed extensions: *.csv)</small>'
					)
				)
			);
			$fileField->getValidator()->setAllowedExtensions(array('csv'));
		}

		if(!$actions) {
			$action = new FormAction('doImport', _t('SecurityAdmin_MemberImportForm.BtnImport', 'Import from CSV'));
			$action->addExtraClass('btn btn-secondary-outline ss-ui-button');
			$actions = new FieldList($action);
		}

		if(!$validator) $validator = new RequiredFields('CsvFile');

		parent::__construct($controller, $name, $fields, $actions, $validator);

		Requirements::javascript(FRAMEWORK_ADMIN_DIR . '/client/dist/js/bundle-lib.js');
		Requirements::javascript(FRAMEWORK_ADMIN_DIR . '/client/dist/js/MemberImportForm.js');
		Requirements::css(FRAMEWORK_ADMIN_DIR . '/client/dist/styles/bundle.css');

		$this->addExtraClass('cms');
		$this->addExtraClass('import-form');
	}

	public function doImport($data, $form) {
		$loader = new MemberCsvBulkLoader();

		// optionally set group relation
		if($this->group) $loader->setGroups(array($this->group));

		// load file
		$result = $loader->load($data['CsvFile']['tmp_name']);

		// result message
		$msgArr = array();
		if($result->CreatedCount()) $msgArr[] = _t(
			'MemberImportForm.ResultCreated', 'Created {count} members',
			array('count' => $result->CreatedCount())
		);
		if($result->UpdatedCount()) $msgArr[] = _t(
			'MemberImportForm.ResultUpdated', 'Updated {count} members',
			array('count' => $result->UpdatedCount())
		);
		if($result->DeletedCount()) $msgArr[] = _t(
			'MemberImportForm.ResultDeleted', 'Deleted %d members',
			array('count' => $result->DeletedCount())
		);
		$msg = ($msgArr) ? implode(',', $msgArr) : _t('MemberImportForm.ResultNone', 'No changes');

		$this->sessionMessage($msg, 'good');

		$this->controller->redirectBack();
	}

	/**
	 * @param $group Group
	 */
	public function setGroup($group) {
		$this->group = $group;
	}

	/**
	 * @return Group
	 */
	public function getGroup($group) {
		return $this->group;
	}
}