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const { graphqlHTTP } = require('express-graphql');
const { buildSchema } = require('graphql');
const { createServer } = require('./api/servers');
const { GraphQLUpload, graphqlUploadExpress } = require('graphql-upload');

const schema = buildSchema(`
    scalar Upload
    type Server {
        id: ID!,
        // stuff...
    }
    input ServerInput {
        bannerFile: Upload,
        name: String!,
        address: String!,
        description: String!
    }
    type Mutation {
        createServer(input: ServerInput!): Server
    }
`);

// The root provides a resolver function for each API endpoint
const root = {
    createServer,
    Upload: GraphQLUpload
};

module.exports = function(app) {
    app.use('/api', graphqlUploadExpress({ maxFileSize: 1000000, maxFiles: 1 }), graphqlHTTP({
        schema: schema,
        rootValue: root,
        graphiql: true,
        customFormatErrorFn: err => ({ message: err.message })
    }));
};