authorizer/server/server.go

package main

import (
	"context"

	"github.com/99designs/gqlgen/graphql/handler"
	"github.com/99designs/gqlgen/graphql/playground"
	"github.com/gin-gonic/gin"
	"github.com/yauthdev/yauth/server/graph"
	"github.com/yauthdev/yauth/server/graph/generated"
)

// Defining the Graphql handler
func graphqlHandler() gin.HandlerFunc {
	// NewExecutableSchema and Config are in the generated.go file
	// Resolver is in the resolver.go file
	h := handler.NewDefaultServer(generated.NewExecutableSchema(generated.Config{Resolvers: &graph.Resolver{}}))

	return func(c *gin.Context) {
		h.ServeHTTP(c.Writer, c.Request)
	}
}

// Defining the Playground handler
func playgroundHandler() gin.HandlerFunc {
	h := playground.Handler("GraphQL", "/graphql")

	return func(c *gin.Context) {
		h.ServeHTTP(c.Writer, c.Request)
	}
}

func GinContextToContextMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		ctx := context.WithValue(c.Request.Context(), "GinContextKey", c)
		c.Request = c.Request.WithContext(ctx)
		c.Next()
	}
}

func main() {
	r := gin.Default()
	r.Use(GinContextToContextMiddleware())
	r.POST("/graphql", graphqlHandler())
	r.GET("/", playgroundHandler())
	r.Run()
}