function gql(stroke, ...args) {
	
	return stroke.reduce((p, n, i) => p + args[i-1] + n);
}

function join(orig, option) {
	let _option = option.split('\n').slice(2, -2);
	let _orig = orig.split('\n');
	let result = _orig.slice(0, -2).concat(_option, _orig.slice(-2));
	return result.join('\n')
}

function concat(...args) {
	let result = args
		.map(q => q.split('\n'))
		.reduce((acc, q) => acc.slice(0, -2).concat(q.slice(2, -2), acc.slice(-2)))
		.join('\n');
	return result;	
}

function join(orig, option) {
	let _option = option.split('\n').slice(2, -2);
	let _orig = orig.split('\n');
	let result = _orig.slice(0, -2).concat(_option, _orig.slice(-2));
	console.log(result.join('\n'));
}

const postType = gql`
    query PostType {
        posts (user: $user) {
            id,
            time
        }
    }
`;

const userType = gql`
    query UserType {
        user (id: $id) {
            id,
            lastLogin,
            username,
        }
    }
`;

console.log(
	concat(postType, userType)  // join(postType, userType)
);


// Results:

// query PostType {
// 	posts (user: $user) {
// 		 id,
// 		 time
// 	}
// 	user (id: $id) {
// 		 id,
// 		 lastLogin,
// 		 username,
// 	}
// }