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// Package main demonstrates a simple web app that uses type-safe enums in a GraphQL resolver.
package main
import (
"context"
_ "embed"
"log"
"net/http"
"github.com/graph-gophers/graphql-go"
"github.com/graph-gophers/graphql-go/relay"
)
//go:embed index.html
var page []byte
//go:embed schema.graphql
var sdl string
type resolver struct {
state State
}
func (r *resolver) Query() *queryResolver {
return &queryResolver{state: &r.state}
}
func (r *resolver) Mutation() *mutationResolver {
return &mutationResolver{state: &r.state}
}
type queryResolver struct {
state *State
}
func (q *queryResolver) State(ctx context.Context) State {
return *q.state
}
type mutationResolver struct {
state *State
}
func (m *mutationResolver) State(ctx context.Context, args *struct{ State State }) State {
*m.state = args.State
return *m.state
}
func main() {
opts := []graphql.SchemaOpt{graphql.UseStringDescriptions()}
schema := graphql.MustParseSchema(sdl, &resolver{}, opts...)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { w.Write(page) })
http.Handle("/query", &relay.Handler{Schema: schema})
log.Fatal(http.ListenAndServe(":8080", nil))
}
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