keksAccount/app/Http/Controllers/API/oAuthController.php

<?php

namespace App\Http\Controllers\API;

use App\Entity\Token;
use App\Exceptions\HTTPException;
use App\Exceptions\NotLoggedInException;
use App\Exceptions\ResourceNotFound;
use App\Models\AccessToken;
use App\Models\App;
use App\Models\AppAccess;
use App\Models\AppCode;
use App\Models\RefreshToken;
use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Log;
use TaGeSo\APIResponse\Response;
use Laravel\Lumen\Routing\Controller as BaseController;

class oAuthController extends BaseController
{
    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    public function getAccess(Response $response, Request $request, $id) {
        if(!Auth::check()) {
            throw new NotLoggedInException();
        }

        $app = App::query()->where("id", "=", $id)->firstOrFail();

        if($request->get("create", false)) {
            $access = AppAccess::getOrCreate(Auth::user()->id, $id);
        } else {
            $access = AppAccess::query()
                ->where("user_id", "=", Auth::user()->id)
                ->where("app_id", "=", $id)->first();
        }

        if(empty($access)) {
            throw new ResourceNotFound();
        }

        //Auto Allow
        if($app->auto_accept) {
            $access->status = "allowed";
        }

        return $response->withData(new \App\Http\Resources\API\AppAccess($access));
    }

    public function allowAccess(Response $response, Request $request, $id) {
        if(!Auth::check()) {
            throw new NotLoggedInException();
        }

        $this->validate($request, [
            'redirect_uri' => 'required|url',
            'state' => ''
        ]);

        $app = App::query()->where("id", "=", $id);

        $access = AppAccess::getOrCreate(Auth::user()->id, $id);
        $access->status = "allowed";
        $access->saveOrFail();

        $appCode = AppCode::createCode($access);


        //Create Redirect URL
        $returnUrl = urldecode($request->input("redirect_uri"));
        if(strpos($returnUrl, "?") > 0) {
            Log::debug("Found questionmark in redirect_uri");
            if(substr($returnUrl, -1, 1) != "&") {
                Log::debug("Add & to the redirect_uri");
                $returnUrl .= "&";
            }
        } else {
            $returnUrl .= "?";
        }

        $returnUrl.="code=".$appCode->code;
        if($request->input("state", null) !== null) {
            $returnUrl .= "&state=".$request->input("state");
        }

        Log::debug("Return URL: ".$returnUrl);


        $res = [];
        $res["appCode"] = $appCode->code;
        $res["redirectUrl"] = $returnUrl;

        return $response->withData($res);
    }
}