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Edit File: AuthorizationController.php

<?php

namespace Laravel\Passport\Http\Controllers;

use Illuminate\Contracts\Routing\ResponseFactory;
use Illuminate\Http\Request;
use Illuminate\Support\Str;
use Laravel\Passport\Bridge\User;
use Laravel\Passport\ClientRepository;
use Laravel\Passport\Passport;
use Laravel\Passport\TokenRepository;
use League\OAuth2\Server\AuthorizationServer;
use Nyholm\Psr7\Response as Psr7Response;
use Psr\Http\Message\ServerRequestInterface;

class AuthorizationController
{
    use HandlesOAuthErrors;

/**
     * The authorization server.
     *
     * @var \League\OAuth2\Server\AuthorizationServer
     */
    protected $server;

/**
     * The response factory implementation.
     *
     * @var \Illuminate\Contracts\Routing\ResponseFactory
     */
    protected $response;

/**
     * Create a new controller instance.
     *
     * @param  \League\OAuth2\Server\AuthorizationServer  $server
     * @param  \Illuminate\Contracts\Routing\ResponseFactory  $response
     * @return void
     */
    public function __construct(AuthorizationServer $server, ResponseFactory $response)
    {
        $this->server = $server;
        $this->response = $response;
    }

/**
     * Authorize a client to access the user's account.
     *
     * @param  \Psr\Http\Message\ServerRequestInterface  $psrRequest
     * @param  \Illuminate\Http\Request  $request
     * @param  \Laravel\Passport\ClientRepository  $clients
     * @param  \Laravel\Passport\TokenRepository  $tokens
     * @return \Illuminate\Http\Response
     */
    public function authorize(ServerRequestInterface $psrRequest,
                              Request $request,
                              ClientRepository $clients,
                              TokenRepository $tokens)
    {
        $authRequest = $this->withErrorHandling(function () use ($psrRequest) {
            return $this->server->validateAuthorizationRequest($psrRequest);
        });

$scopes = $this->parseScopes($authRequest);

$token = $tokens->findValidToken(
            $user = $request->user(),
            $client = $clients->find($authRequest->getClient()->getIdentifier())
        );

if (($token && $token->scopes === collect($scopes)->pluck('id')->all()) ||
            $client->skipsAuthorization()) {
            return $this->approveRequest($authRequest, $user);
        }

$request->session()->put('authToken', $authToken = Str::random());
        $request->session()->put('authRequest', $authRequest);

return $this->response->view('passport::authorize', [
            'client' => $client,
            'user' => $user,
            'scopes' => $scopes,
            'request' => $request,
            'authToken' => $authToken,
        ]);
    }

/**
     * Transform the authorization requests's scopes into Scope instances.
     *
     * @param  \League\OAuth2\Server\RequestTypes\AuthorizationRequest  $authRequest
     * @return array
     */
    protected function parseScopes($authRequest)
    {
        return Passport::scopesFor(
            collect($authRequest->getScopes())->map(function ($scope) {
                return $scope->getIdentifier();
            })->unique()->all()
        );
    }

/**
     * Approve the authorization request.
     *
     * @param  \League\OAuth2\Server\RequestTypes\AuthorizationRequest  $authRequest
     * @param  \Illuminate\Database\Eloquent\Model  $user
     * @return \Illuminate\Http\Response
     */
    protected function approveRequest($authRequest, $user)
    {
        $authRequest->setUser(new User($user->getAuthIdentifier()));

$authRequest->setAuthorizationApproved(true);

return $this->withErrorHandling(function () use ($authRequest) {
            return $this->convertResponse(
                $this->server->completeAuthorizationRequest($authRequest, new Psr7Response)
            );
        });
    }
}

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