fixed changing of pointers

internal/game/session.go

@@ -27,14 +27,14 @@ type Session struct {
 	CurrentUser *User
 }
 
-func NewSession(phrase string) Session {
+func NewSession(phrase string) *Session {
 	sessionName := petname.Generate(3, "-")
 	p := strings.Split(phrase, "")
 
 	s := Session{
 		id:               lastSessionId,
 		Name:             sessionName,
-		Users:            []User{},
+		Users:            make([]User, 0),
 		phrase:           p,
 		AskedLetters:     []string{},
 		DiscoveredPhrase: make([]string, len(p)),
@@ -44,34 +44,44 @@ func NewSession(phrase string) Session {
 	}
 
 	sessionStorage = append(sessionStorage, s)
-	nameToSession[sessionName] = &s
+	nameToSession[sessionName] = &sessionStorage[len(sessionStorage)-1]
 	lastSessionId++
 
-	return s
+	return &sessionStorage[len(sessionStorage)-1]
 }
 
-func GetSession(name string) *Session {
-	return nameToSession[name]
+func GetSession(name string) (*Session, error) {
+	s, ok := nameToSession[name]
+	if !ok {
+		return s, errors.New("can't find session " + name)
+	}
+
+	return s, nil
 }
 
 func (s *Session) AddUser(user User) {
 	s.Users = append(s.Users, user)
 
-	if s.CurrentUser == nil {
-		s.CurrentUser = &s.Users[s.userIndex]
-	}
+	// fmt.Printf("#### Adding %v:\t%p\n", s.Users[len(s.Users)-1].Name, &(s.Users[len(s.Users)-1]))
+	// append changes the pointers to the users because it needs to resize that slice
+	s.CurrentUser = &(s.Users[s.userIndex])
 }
 
-func (s Session) VerifySignature(signature string, message []byte) *User {
-	for _, u := range s.Users {
-		sig, _ := base64.StdEncoding.DecodeString(signature)
+func (s *Session) VerifySignature(signature string, message []byte) (*User, error) {
+	sig, err := base64.StdEncoding.DecodeString(signature)
+	if err != nil {
+		return nil, err
+	}
 
-		if ed25519.Verify(u.PublicKey, message, sig) {
-			return &u
+	for i := range s.Users {
+		// fmt.Printf("looking %v:\t%p\n", s.Users[i].Name, &(s.Users[i]))
+
+		if ed25519.Verify(s.Users[i].PublicKey, message, sig) {
+			return &s.Users[i], nil
 		}
 	}
 
-	return nil
+	return nil, errors.New("this user was not fount in the current session")
 }
 
 func (s *Session) GuessLetter(letter string) (*Session, error) {
@@ -101,5 +111,6 @@ func (s *Session) GuessLetter(letter string) (*Session, error) {
 
 	s.userIndex = (s.userIndex + 1) % len(s.Users)
 	s.CurrentUser = &s.Users[s.userIndex]
+
 	return s, nil
 }