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middleware.go
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middleware.go
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package server
import (
"context"
"errors"
"fmt"
"net/http"
"strconv"
"github.com/go-chi/chi"
"github.com/nokia-wroclaw/innovativeproject-togeather/backend/pkg/core"
)
type lobbyMiddleware struct {
lobbyService core.LobbyService
userService core.UserService
}
var CookieUserIDKey = "user-id"
var UserKey = "user"
func authMiddleware(next http.HandlerFunc, m lobbyMiddleware) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
userCookie, err := r.Cookie(CookieUserIDKey)
if err != nil {
respondError(w, http.StatusBadRequest,
fmt.Errorf("unauthorized: user not logged in"))
return
}
if userCookie == nil {
respondError(w, http.StatusBadRequest,
errors.New("unauthorized: no user found"))
return
}
userID, err := strconv.Atoi(userCookie.Value)
if err != nil {
respondError(w, http.StatusBadRequest,
errors.New("incorrect cookie value: not a number"))
return
}
user, err := m.userService.Get(ctx, userID)
if err != nil {
respondError(w, http.StatusBadRequest,
fmt.Errorf("error retrieving given user " +
"from database: %v", userID))
return
}
newCtx := context.WithValue(ctx, UserKey, user)
next.ServeHTTP(w, r.WithContext(newCtx))
}
}
//func authMiddleware(m lobbyMiddleware, h http.Handler) http.Handler {
// return http.HandlerFunc(func (w http.ResponseWriter, r *http.Request) {
// ctx := r.Context()
//
// userCookie, err := r.Cookie("user-id")
// if err != nil {
// h.ServeHTTP(w, r)
// return
// }
//
// if userCookie == nil {
// respondError(w, http.StatusBadRequest,
// errors.New("unauthorized: no user found"))
// return
// }
//
// userID, err := strconv.Atoi(userCookie.Value)
// if err != nil {
// respondError(w, http.StatusBadRequest,
// errors.New("incorrect cookie value: not a number"))
// return
// }
//
// user, err := m.userService.Get(ctx, userID)
// if err != nil {
// respondError(w, http.StatusBadRequest,
// fmt.Errorf("error retrieving given user " +
// "from database: %v", userID))
// return
// }
//
// newCtx := context.WithValue(ctx, UserKey, user)
// h.ServeHTTP(w, r.WithContext(newCtx))
// })
//}
//
func (m *lobbyMiddleware) cookiesMiddleware(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
cookie, err := r.Cookie("user-id")
if err != nil && r.Method == "GET"{
respondError(w, http.StatusBadRequest, errors.New("user not authorized"))
return
} else if err != nil{
h.ServeHTTP(w, r)
return
}
clientID, err := strconv.Atoi(cookie.Value)
if err != nil {
respondError(w, http.StatusBadRequest, err)
return
}
lobbyID, err := strconv.Atoi(chi.URLParam(r, "lobbyID"))
if err != nil {
respondError(w, http.StatusBadRequest, err)
return
}
ctx := r.Context()
exists, err := m.lobbyService.BelongsToLobby(ctx, clientID, lobbyID)
if err != nil {
respondError(w, http.StatusBadRequest, err)
return
}
if (exists && r.Method == "GET") || (!exists && r.Method == "POST"){
h.ServeHTTP(w, r)
} else if exists && r.Method == "POST" {
respondError(w, http.StatusBadRequest, errors.New("given user already belongs to this lobby"))
return
} else {
respondError(w, http.StatusBadRequest, errors.New("given user does not belong to this lobby"))
return
}
})
}