issues.php

<?php
/**
 * @property Parsedown $parsedown
 */
final class IssuesController extends \TracToGitlab\Controller
{
    const SECRET_ISSUE_OPEN = 'N]<d5V/6tn/sYNMy';

    const LABEL_MAPPING = [
        'TIC'  => ['1927f2b86d6b185aa6c6697810ad42f1', 'a65dd807699b7b3b3d182b674042b70e', 'TIC #%u: %s'],
        'StEP' => ['1927f2b86d6b185aa6c6697810ad42f1', '93c84607e687030b249a69cd30ca7bd9', 'StEP%05u: %s'],
    ];

    public function create_action()
    {
        if (!Request::isPost()) {
            throw new MethodNotAllowedException();
        }

        if ($_SERVER['HTTP_X_GITLAB_TOKEN'] !== self::SECRET_ISSUE_OPEN) {
            throw new AccessDeniedException();
        }

        $input = file_get_contents('php://input');
        $payload = json_decode($input, true);

        if ($payload['object_attributes']['action'] === 'open') {
            $user = User::findOneByUsername($payload['user']['username'])
                 ?? User::findOneByEmail($payload['user']['email'])
                 ?? User::findOneByUsername('gitlab-bot');

            if ($user) {
                foreach (self::LABEL_MAPPING as $label => $definition) {
                    if (!$this->hasLabel($payload, $label)) {
                        continue;
                    }
                    $title = sprintf(
                        $definition[2],
                        $payload['object_attributes']['iid'],
                        $payload['object_attributes']['title']
                    );
                    $body = Studip\Markup::markAsHtml(
                        $this->parsedown->text(
                            sprintf(
                                "%s\n\n----\nZum [gitlab-Issue #%u](%s)",
                                trim($payload['object_attributes']['description']),
                                $payload['object_attributes']['iid'],
                                $payload['object_attributes']['url']
                            )
                        )
                    );

                    $url = $this->createForumEntry(
                        $user,
                        $title,
                        $body,
                        $definition[0],
                        $definition[1]
                    );

                    $this->gitlab->issues()->addNote(
                        $payload['project']['id'],
                        $payload['object_attributes']['iid'],
                        "[Zum Forenbeitrag auf dem Entwicklungsserver]({$url})"
                    );                }
            }
        }
        $this->render_nothing();
    }

    private function hasLabel(array $change, string $needle): bool
    {
        foreach ($change['labels'] as $label) {
            if ($label['title'] === $needle) {
                return true;
            }
        }

        return false;
    }

    /**
     * @return string Absolute URL to forum posting
     */
    private function createForumEntry(\User $user, string $subject, string $body, string $course_id, string $parent_id)
    {
        require_once "{$GLOBALS['STUDIP_BASE_PATH']}/public/plugins_packages/core/Forum/models/ForumEntry.php";

        $id =  md5(uniqid('forum-entry', true));

        \ForumEntry::insert([
            'topic_id'    => $id,
            'seminar_id'  => $course_id,
            'user_id'     => $user->id,
            'name'        => $subject,
            'content'     => $body,
            'author'      => $user->getFullName(),
            'author_host' => '',
        ], $parent_id);

        $old_base = \URLHelper::setBaseURL($GLOBALS['ABSOLUTE_URI_STUDIP']);
        $url = \PluginEngine::getURL(
            'CoreForum',
            ['cid' => $course_id],
            "index/index/{$id}#{$id}"
        );
        \URLHelper::setBaseURL($old_base);

        return $url;
    }
}