feat: log failed and successful login attempts

server/src/handler/login.go

@@ -3,6 +3,8 @@ package handler
 import (
 	"fmt"
 	"net/http"
+
+	"sirlab.de/go/knowyt/log"
 	"sirlab.de/go/knowyt/user"
 )
 
@@ -25,17 +27,21 @@ func (authMux *AuthMux) Logout(w http.ResponseWriter, r *http.Request) {
 func (authMux *AuthMux) Login(w http.ResponseWriter, r *http.Request) {
 	usr, err := authMux.checkCode(r)
 	if err != nil {
+		log.ErrorLog(err)
 		http.SetCookie(w, authMux.createCookie())
 		authMux.accessDenied(w, r)
 		return
 	}
 
+	log.Info("%s logged into game %s\n", usr.GetName(), usr.GetGameId())
+
 	cookie := authMux.createCookie()
 	cookie.Value = usr.GetId() + ":" + usr.GetAuthCode()
 	cookie.MaxAge = 0
 	http.SetCookie(w, cookie)
 	w.Header().Add("Content-Type", "text/plain")
 	fmt.Fprintf(w, "ok")
+
 }
 
 func (authMux *AuthMux) checkCode(r *http.Request) (*user.User, error) {
@@ -44,12 +50,12 @@ func (authMux *AuthMux) checkCode(r *http.Request) (*user.User, error) {
 	code := form.Get("code")
 
 	if len(code) != 6 {
-		return nil, fmt.Errorf("invalid code")
+		return nil, fmt.Errorf("invalid code \"%s\"", code)
 	}
 
 	usr, err := authMux.app.GetUserByAuthcode(code)
 	if err != nil {
-		return nil, fmt.Errorf("invalid code")
+		return nil, fmt.Errorf("invalid code: \"%s\"", code)
 	}
 
 	return usr, nil

server/src/log/log.go

@@ -52,8 +52,5 @@ func Error(format string, v ...any) {
 }
 
 func ErrorLog(err error) {
-	lock.Lock()
-	defer lock.Unlock()
-
 	Error("%v\n", err)
 }