Codeigniter3 + graphql-php

# Composer 설치

# composer 설치해준다. php5.6 이상에서 사용할 수 있음.
composer require webonyx/graphql-php

# Core/Controller.php

class Graphql_Controller extends CI_Controller
{
    public function __construct() {
        parent::__construct();
    }

    public function response($schema=null) {
        try{
            $input = json_decode(file_get_contents('php://input'), true);
            $query = $input['query'];

            $variableValues = isset($input['variables']) ? $input['variables'] : null;
            $result = GraphQL\GraphQL::executeQuery(
                $schema,
                $query,
                $this->rootValue(),
                $context = null,
                $variableValues = null,
                $operationName = null,
                $fieldResolver = null,
                $myValiationRules
           );

           $output = $result->jsonSerialize();
        } catch (Exception $e) {
            $output = [
                'errors' => [
                    [
                        'message'   => $e->getMessage(),
                        'code'      => $e->getCode()
                    ]
                ]
            ];
        } finally {
            $this
                ->output
                ->set_content_type('json')
                ->set_output(json_encode($output));
        }
    }

    public function rootValue() {
        return [];
    }
}

# Controller.php

//ci config 설정안되었을 떄 autoload 추가.
//require_once 'vendor/autoload.php';

use GraphQL\Type\Definition\ObjectType;
use GraphQL\Type\Definition\Type;
use GraphQL\Type\Definition\InputObjectType;
use GraphQL\Type\Schema;
use GraphQL\Type\Definition\ResolveInfo;
use GraphQL\Language\Parser;
use GraphQL\Utils\BuildSchema;
use GraphQL\Utils\AST;

class Index extends Graphql_Controller
{
    public function __construct() {
        parent::__construct();
    }

    public function index(){
        //none
    }

    /*
    * 스키마들을 추가해준다.
    */
    public function rootValue() {
        return [
            'echo' => function($root, $args) {
                if (isset($args['message'])) {
                    return $args['message'];
                }

                return "no message";
            },
            'hello' => function($root, $args) {
                return "hello graphqlworld";
            }
        ];
    }

    public function graphql() {
        $document = Parser::parse(file_get_contents("schema.graphql"));
        $schema = BuildSchema::build($document);
        $this->response($schema);
    }
}

# schema.graphql

schema {
    query: Query,
    mutation: Mutation,
}

type Mutation {
    echo(message: String!): String,
    ...
}

type Query {
    hello: String,
    ...
}

# request

Query {
    mutation { echo(message: "This is Graphql") }
    query { hello }
}

 

참고: https://banjubu.tistory.com/117

[PHP] Codeigniter 에 GraphQL 적용하기

참고: https://github.com/webonyx/graphql-php

webonyx/graphql-php

참고: https://webonyx.github.io/graphql-php/

graphql-php

참고 : https://graphql.org

GraphQL | A query language for your API