package api

import (
	"context"
	"strings"

	"google.golang.org/grpc/metadata"
)

type MD metadata.MD

func RequestMetadata(ctx context.Context) MD {
	m, ok := metadata.FromIncomingContext(ctx)
	if !ok {
		return nil
	}
	return MD(m)
}

func (md MD) Get(k string) string {
	if md == nil {
		return ""
	}

	k = strings.ToLower(k)
	if res := md[k]; len(res) > 0 {
		return res[0]
	}
	return ""
}