Simplify Graphql configuration using plain methods with typehints and annotations.

This bundle is a wrapper on webonyx/graphql-php.

Disclaimer

I’m new to GraphQL, currently writing my first project using it. I’m sure that many things are missing from the bundle and many assumptions I made are wrong, so please be understanding, and if possible help out with a pull request.

Instalation

$ composer require avris/graphql-bundle

Then add a route:

avris_graphql_main:
    path: '/graph'
    controller: Avris\GraphqlBundle\Controller\GraphqlController::main

Example

Let’s say you have the following type in your app:

<?php

namespace App\Entity;

final class User
{
    // properties, constructor, etc.

    private static $type = null;

    final public static function type(): ObjectType
    {
        return static::$type ?: static::$type = static::buildType();
    }

    private static function buildType(): ObjectType
    {
        return new ObjectType([
            'name' => 'User',
            'fields' => [
                'id' => [
                    'type' => Type::id(),
                    'resolve' => function (User $user) {
                        return $user->getId();
                    },
                ],
                'email' => [
                    'type' => Type::string(),
                    'resolve' => function (User $user) {
                        return $user->getEmail();
                    },
                ],
            ],
        ]);
    }

    public function getId(): string
    {
        return $this->id;
    }

    public function getEmail(): string
    {
        return $this->email;
    }
}

And the following GraphQL schema:

new Schema([
    'query' => new ObjectType([
        'name' => 'Query',
        'fields' => [
            'hello' => [
                'type' => Type::string(),
                'resolve' => function () {
                    return 'GraphQL API';
                }
            ],
            'user' => [
                'type' => User::type(),
                'args' => [
                    'id' => ['type' => Type::nonNull(Type::id())],
                ],
                'resolve' => $this->accessControl->guard(function ($root, $args) {
                    return $this->repository->find($args['id']);
                }, 'ROLE_ADMIN'),
            ],
            'currentUser' => [
                'type' => User::type(),
                'resolve' => function ($root, $args) {
                    $user = $this->tokenStorage->getToken()->getUser();

                    return $user instanceof User ? $user : null;
                },
            ],
            'jwt' => [
                'type' => Type::string(),
                'args' => [
                    'login' => Type::nonNull(Type::string()),
                    'password' => Type::nonNull(Type::string()),
                ],
                'resolve' => function ($root, $args) {
                    $user = $this->repository->findOneBy(['email' => $args['login']]);

                    if (!$user || !$this->encoder->isPasswordValid($user, $args['password'])) {
                        return null;
                    }

                    return (string) $this->jwtManager->issue($user);
                },
            ]
        ],
    ]),
    'mutation' => new ObjectType([
        'name' => 'Mutation',
        'fields' => [
            'userRegistered' => [
                'type' => User::type(),
                'args' => [
                    'email' => Type::nonNull(Type::string()),
                    'password' => Type::nonNull(Type::string()),
                ],
                'resolve' => function ($root, $args) {
                    return $this->eventDispatcher->dispatch(new UserRegisteredEvent($args['email'], $args['password']));
                },
            ]
        ],
    ]),
]);

Using this bundle, you can rewrite the entity/type like this:

<?php

namespace App\Entity;

use Avris\GraphqlBundle\Annotation as Graphql;

/**
 * @Graphql\Type
 */
final class User
{
    // properties, constructor, etc.

    /**
     * @Graphql\Query
     */
    public function getId(): string
    {
        return $this->id;
    }

    /**
     * @Graphql\Query
     */
    public function getEmail(): string
    {
        return $this->email;
    }
}

And your schema/controllers like this:

<?php

namespace App\Controller;

use Avris\GraphqlBundle\Annotation as Graphql;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

final class HomeController extends AbstractController
{
    /**
     * @Graphql\Query
     */
    public function hello(): string
    {
        return 'GraphQL API';
    }
}

and:

<?php

namespace App\Controller;

use Avris\GraphqlBundle\Annotation as Graphql;
use App\Entity\User;
use App\Events\UserRegistered;

final class UserController extends BaseController
{
    // dependecies...

    /**
     * @Graphql\Query
     * @Graphql\Security("ROLE_ADMIN")
     * @Graphql\ParamType("id", var="id")
     */
    public function user(string $id): ?User
    {
        return $this->repository->find($id);
    }

    /**
     * @Graphql\Query
     */
    public function currentUser(): ?User
    {
        $user = $this->tokenStorage->getToken()->getUser();

        return $user instanceof User ? $user : null;
    }

    /**
     * @Graphql\Query
     */
    public function jwt(string $login, string $password): ?string
    {
        $user = $this->repository->findOneBy(['email' => $login]);

        if (!$user || !$this->encoder->isPasswordValid($user, $password)) {
            return null;
        }

        return (string) $this->jwtManager->issue($user);
    }

    /**
     * @Graphql\Query("mutation")
     */
    public function userRegistered(string $email, string $password): User
    {
        return $this->eventDispatcher->dispatch(new UserRegisteredEvent($email, $password));
    }
}

The bundle will parse all the classes in src/Controller and src/Entity (that list can be configured in the config key avris_graphql.load) looking for the Graphql annotations.

All parameters of a query-method, as well as its return type have to be typehinted. Supported built-in types are string, bool, int and float. You can also typehint any type you registered with @Graphql\Type.

Additionally, you can use id, list (int[]) and union (int|float), but for that you need an @Graph\ParamType or @Graph\ReturnType annotation for that.

Copyright