package blog

import (
	"encoding/json"
	"net/http"
	"strconv"
	"strings"
)

func readJSON(r *http.Request, data interface{}) error {
	decoder := json.NewDecoder(r.Body)
	return decoder.Decode(data)
}

func writeJSON(w http.ResponseWriter, data interface{}) error {
	if d, err := json.Marshal(data); err != nil {
		return err
	} else {
		w.Header().Set("Content-Length", strconv.Itoa(len(d)))
		w.Header().Set("Content-Type", "application/json")
		w.Write(d)
	}
	return nil
}

func tokenFromRequest(r *http.Request) string {
	var token string
	tokencookie, e := r.Cookie("token")
	if e == nil {
		token = tokencookie.Value
	}

	if token == "" {
		tmp := strings.SplitN(r.Header.Get("Authorization"), " ", 2)
		if strings.ToLower(tmp[0]) != "bearer" {
			return ""
		}
		token = tmp[1]
	}
	return token
}