merge.php

<?php
final class MergeController extends TracToGitlab\GitlabController
{
    public function before_filter(&$action, &$args)
    {
        parent::before_filter($action, $args);

        PageLayout::setTitle(_('Übersicht noch zu portierender Bugfixes'));
        $this->activateNavigation('merge');
    }

    public function index_action()
    {
        $data = $this->readFromCache('issues-to-merge', true);
        if ($data === false) {
            $this->issues = $this->fetchIssues();
            $this->writeToCache('issues-to-merge', $this->issues);
        } else {
            $this->issues = $data['data'];

            Sidebar::get()->addWidget(new TemplateWidget(
                'Aus dem Cache',
                $this->get_template_factory()->open(
                    $this->get_default_template('sidebar')
                ),
                ['time' => time()]
            ));
        }
    }

    public function diff_action($mr_iid)
    {
//        $versions = $this->gitlab->mergeRequests()->
    }

    private function fetchIssues(): array
    {
        $issues = $this->gitlabPager->fetchAll(
            $this->gitlab->issues(),
            'all',
            [
                $this->gitlabProjectId,
                [
                    'sort'      => 'asc',
                    'scope'     => 'all',
                    'milestone' => 'None',
                    'labels'    => 'BIEST',
                    'state'     => 'closed',
                ]
            ]
        );

        $issues = array_filter($issues, function ($issue) {
            if ($issue['confidential']) {
                return false;
            }

            foreach (['worksforme', 'wontfix', 'Duplicate', 'invalid'] as $label) {
                if (in_array($label, $issue['labels'])) {
                    return false;
                }
            }

            $has_version = array_reduce($issue['labels'], function ($has_version, $label) {
                return $has_version || strpos($label, 'Version::') === 0;
            }, false);
            return $has_version;
        });

        $issues = array_map(function ($issue) {
            $issue['studip_version'] = $this->extractVersion($issue['labels']);
            $issue['mr'] = $this->fetchRelatedMergeRequest($issue['iid']);
            return $issue;
        }, $issues);

        usort($issues, function ($a, $b) {
            return strcmp($b['studip_version'], $a['studip_version']);
        });

        return $issues;
    }

    private function fetchRelatedMergeRequest(int $issue_id)
    {
        $mrs = $this->gitlab->issues()->closedByMergeRequests(
            $this->gitlabProjectId,
            $issue_id
        );
        foreach ($mrs as $mr) {
            if ($mr['state'] === 'merged') {
                return $mr['iid'];
            }
        }
        return null;
    }

    private function extractVersion(array $labels): string
    {
        $version = '';
        foreach ($labels as $label) {
            if (strpos($label, 'Version::') === 0) {
                $v = substr($label, 9);
                if (!$version || $v < $version) {
                    $version = $v;
                }
            }
        }
        return $version;
    }
}