Add join date check, notify if old user triggers detection

bot.go

@@ -522,6 +522,34 @@ func handleNewMessage(ctx context.Context, api *tg.Client, alertPeer *tg.InputPe
 		return nil
 	}
 
+	// Extract sender ID early for join date check
+	fromID, ok := msg.FromID.(*tg.PeerUser)
+	if !ok {
+		return fmt.Errorf("could not determine sender")
+	}
+	senderID := int64(fromID.UserID)
+
+	// Check user join date - if over 24h old, send notify but don't delete
+	joinDate, err := getUserJoinDate(ctx, api, state.cfg.MonitoredChat, state.cfg.MonitoredChatAccessHash, senderID)
+	if err == nil {
+		if time.Since(joinDate) > 24*time.Hour {
+			// User joined over 24 hours ago - notify but don't action
+			user, ok := entities.Users[senderID]
+			if ok {
+				displayName := fullName(user.FirstName, user.LastName)
+				userDisplay := displayName
+				if user.Username != "" {
+					userDisplay += " (@" + user.Username + ")"
+				}
+				chatName := entities.Channels[chatID].Title
+				notifyMsg := fmt.Sprintf("🚨 Alert (Old User)\nScore: %.2f\nChat: %s (ID: %d)\nUser: %s (ID: %d)\nJoined: %v ago\n\n%s",
+					result.score, chatName, chatID, userDisplay, senderID, time.Since(joinDate), msg.Message)
+				notify(notifyMsg, state.cfg, fmt.Sprintf("Scam Alert: %s", chatName))
+			}
+			return nil
+		}
+	}
+
 	log.Printf("Matched message with score %.2f", result.score)
 	for key, values := range result.matchedKeywords {
 		for _, value := range values {
@@ -534,7 +562,7 @@ func handleNewMessage(ctx context.Context, api *tg.Client, alertPeer *tg.InputPe
 	if !ok {
 		return fmt.Errorf("channel %d not found in entities", chatID)
 	}
-	_, err := api.ChannelsDeleteMessages(ctx, &tg.ChannelsDeleteMessagesRequest{
+	_, err = api.ChannelsDeleteMessages(ctx, &tg.ChannelsDeleteMessagesRequest{
 		Channel: &tg.InputChannel{
 			ChannelID:  chatID,
 			AccessHash: channel.AccessHash,
@@ -545,13 +573,6 @@ func handleNewMessage(ctx context.Context, api *tg.Client, alertPeer *tg.InputPe
 		log.Printf("Failed to delete message: %v", err)
 	}
 
-	// Get sender info
-	fromID, ok := msg.FromID.(*tg.PeerUser)
-	if !ok {
-		return fmt.Errorf("could not determine sender")
-	}
-	senderID := int64(fromID.UserID)
-
 	user, ok := entities.Users[senderID]
 	if !ok {
 		return fmt.Errorf("user %d not found in entities", senderID)