feat: validate client settings and improve logging

- add a function to check if Pomodoro settings are valid
- log a warning for invalid client configurations
- log an info message for valid client configurations
- implement Stringer interface for PomodoroConfig model

🤖

internal/websocket/client_commands.go

@@ -9,6 +9,10 @@ import (
 	"git.smsvc.net/pomodoro/GoTomato/pkg/models"
 )
 
+func checkSettings(settings models.PomodoroConfig) bool {
+	return settings.Work > 0 && settings.ShortBreak > 0 && settings.LongBreak > 0 && settings.Sessions > 0
+}
+
 // Listens for commands from a client and handles them
 func handleClientCommands(c models.WebsocketClient) {
 	ws := c.Conn
@@ -50,6 +54,11 @@ func handleClientCommands(c models.WebsocketClient) {
 				}
 			case "updateSettings":
 				if !pomodoro.IsPomodoroOngoing() {
+					if !checkSettings(clientCommand.Settings) {
+						log.Warn("Ignoring invalid config:", "msg", clientCommand.Settings, "host", c.Conn.RemoteAddr())
+						break
+					}
+					log.Info("Client send config", "config", clientCommand.Settings, "host", c.Conn.RemoteAddr())
 					pomodoro.UpdateSettings(clientCommand.Settings)
 				}
 			}