i wanted to add full cahce but i dont have time :(

cache.go

@@ -22,6 +22,26 @@ func CacheGetClientById(id uint32) (*Client, error) {
 	return client, nil
 }
 
+func CacheGetIdByName(name string) (uint32, error) {
+	client, err := CacheGetClientByName(name)
+	if err != nil {
+		return 0, err
+	}
+	return client.Id, nil
+}
+
+func CacheGetClientByName(name string) (*Client, error) {
+	mu.RLock()
+	defer mu.RUnlock()
+
+	for _, client := range CacheClients {
+		if client.Name == name {
+			return client, nil
+		}
+	}
+	return nil, fmt.Errorf("client %s not found", name)
+}
+
 func CacheSetClient(client *Client) {
 	mu.Lock()
 	defer mu.Unlock()

database.go

@@ -73,6 +73,14 @@ func DbSaveClientWithoutGroups(ctx context.Context, client *Client) error {
 	return err
 }
 
+func DbGetIdByClientName(ctx context.Context, name string) (uint32, error) {
+	var id uint32
+	err := dbConn.QueryRow(ctx, `
+		SELECT id FROM clients WHERE name = $1 
+	`, name).Scan(&id)
+	return id, err
+}
+
 func DbSetClientByName(ctx context.Context, client *Client) error {
 	err := dbConn.QueryRow(ctx, `
 		SELECT name, pass_hash, color_red, color_green, color_blue, created_at FROM clients WHERE name = $1

http.go

@@ -88,33 +88,24 @@ func HttpHandleLogin(response http.ResponseWriter, request *http.Request) {
 		return
 	}
 
-	var client = Client{Name: username}
-	if len(client.Name) < 8 {
+	if len(username) < 8 {
 		http.Error(response, "no or short password", http.StatusBadRequest)
 		return
 	}
 
-	ctx := request.Context()
+	var (
+		clientId uint32
+		err      error
+		ctx      = request.Context()
+	)
 
-	err := DbSetClientByName(ctx, &client)
+	clientId, err = CacheGetIdByName(username)
 	if err != nil {
-		http.Error(response, "bad login", http.StatusUnauthorized)
-		return
-	}
-
-	_, err = CacheGetClientById(client.Id)
-	if err == nil {
-		otherLoggedIn, err := CacheGetClientById(client.Id)
-		if err == nil {
-			otherLoggedIn.WsConn.CloseNow()
-		}
-	}
-
-	token, err := TokenCreate(client.Id)
+		clientId, err = DbGetIdByClientName(ctx, username)
 		if err != nil {
-		http.Error(response, "internal server error", http.StatusInternalServerError)
+
+		}
 	}
-	response.Write([]byte(token))
 }
 
 func HttpHandleGroupCreate(response http.ResponseWriter, request *http.Request) {