main.go

package main

import (
	"encoding/json"
	"net/http"

	"github.com/graphql-go/graphql"
)

type Album struct {
	ID     string `json:"id,omitempty"`
	Artist string `json:"artist"`
	Title  string `json:"title"`
	Year   string `json:"year"`
	Genre  string `json:"genre"`
	Type   string `json:"type"`
}

type Artist struct {
	ID   string `json:"id,omitempty"`
	Name string `json:"name"`
	Type string `json:"type"`
}

type Song struct {
	ID       string `json:"id,omitempty"`
	Album    string `json:"album"`
	Title    string `json:"title"`
	Duration string `json:"duration"`
	Type     string `json:"type"`
}

func main() {
	schema, _ := graphql.NewSchema(graphql.SchemaConfig{})
	http.HandleFunc("/graphql", func(w http.ResponseWriter, r *http.Request) {
		result := graphql.Do(graphql.Params{
			Schema:        schema,
			RequestString: r.URL.Query().Get("query"),
		})
		json.NewEncoder(w).Encode(result)
	})
	http.ListenAndServe(":12345", nil)
}