Function useThemeCommand

packages/cli/src/ui/hooks/useThemeCommand.ts:24–111

(
  loadedSettings: LoadedSettings,
  setThemeError: (error: string | null) => void,
  addItem: (item: Omit<HistoryItem, 'id'>, timestamp: number) => void,
)

}

export const useThemeCommand = (
  loadedSettings: LoadedSettings,
  setThemeError: (error: string | null) => void,
  addItem: (item: Omit<HistoryItem, 'id'>, timestamp: number) => void,
): UseThemeCommandReturn => {
  const [isThemeDialogOpen, setIsThemeDialogOpen] = useState(false);

  // Check for invalid theme configuration on startup
  useEffect(() => {
    const effectiveTheme = loadedSettings.merged.theme;
    if (effectiveTheme && !themeManager.findThemeByName(effectiveTheme)) {
      setIsThemeDialogOpen(true);
      setThemeError(`Theme "${effectiveTheme}" not found.`);
    } else {
      setThemeError(null);
    }
  }, [loadedSettings.merged.theme, setThemeError]);

  const openThemeDialog = useCallback(() => {
    if (process.env['NO_COLOR']) {
      addItem(
        {
          type: MessageType.INFO,
          text: 'Theme configuration unavailable due to NO_COLOR env variable.',
        },
        Date.now(),
      );
      return;
    }
    setIsThemeDialogOpen(true);
  }, [addItem]);

  const applyTheme = useCallback(
    (themeName: string | undefined) => {
      if (!themeManager.setActiveTheme(themeName)) {
        // If theme is not found, open the theme selection dialog and set error message
        setIsThemeDialogOpen(true);
        setThemeError(`Theme "${themeName}" not found.`);
      } else {
        setThemeError(null); // Clear any previous theme error on success
      }
    },
    [setThemeError],
  );

  const handleThemeHighlight = useCallback(
    (themeName: string | undefined) => {
      applyTheme(themeName);
    },
    [applyTheme],
  );

  const handleThemeSelect = useCallback(
    (themeName: string | undefined, scope: SettingScope) => {
      try {
        // Merge user and workspace custom themes (workspace takes precedence)
        const mergedCustomThemes = {
          ...(loadedSettings.user.settings.customThemes || {}),