cxxfds-service/app/Http/Controllers/Api/Concerns/ResolvesParticipantApplication.php

<?php

namespace App\Http\Controllers\Api\Concerns;

use App\Models\Application;
use App\Models\Competition;
use Illuminate\Http\Request;

trait ResolvesParticipantApplication
{
    protected function resolvePublishedCompetitionFromRequest(Request $request): Competition
    {
        $slug = $request->query('competition_slug');
        if (! is_string($slug) || trim($slug) === '') {
            $slug = $request->header('X-Competition-Slug');
        }
        if (! is_string($slug) || trim($slug) === '') {
            abort(response()->json(['message' => '请附带 competition_slug（查询参数或 X-Competition-Slug 头）'], 422));
        }

        $slug = trim($slug);

        $c = Competition::query()
            ->where('slug', $slug)
            ->where('published', true)
            ->first();

        if ($c === null) {
            abort(response()->json(['message' => '赛事不存在或未发布'], 404));
        }

        return $c;
    }

    protected function participantApplication(Request $request): Application
    {
        $competition = $this->resolvePublishedCompetitionFromRequest($request);

        return Application::query()->firstOrCreate(
            [
                'user_id' => $request->user()->id,
                'competition_id' => $competition->id,
            ],
            ['status' => 'draft']
        );
    }
}