feat: add a theme cli command

Author: nikaro

internal/cmd/theme.go

@@ -0,0 +1,100 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/charmbracelet/crush/internal/config"
+	"github.com/spf13/cobra"
+)
+
+var themeCmd = &cobra.Command{
+	Use:   "theme",
+	Short: "Manage TUI themes",
+	Long:  `Manage the visual theme for the Crush TUI interface.`,
+}
+
+var themeListCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List available themes",
+	Long:  `List all available themes for the Crush TUI interface.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		fmt.Println("Available themes:")
+		fmt.Println("  charmtone       - Dark theme (default)")
+		fmt.Println("  charmtone-light - Light theme")
+		return nil
+	},
+}
+
+var themeSetCmd = &cobra.Command{
+	Use:   "set [theme-name]",
+	Short: "Set the current theme",
+	Long:  `Set the theme for the Crush TUI interface. Available themes: charmtone, charmtone-light`,
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		themeName := args[0]
+
+		// Validate theme name
+		validThemes := map[string]bool{
+			"charmtone":       true,
+			"charmtone-light": true,
+		}
+
+		if !validThemes[themeName] {
+			return fmt.Errorf("invalid theme '%s'. Available themes: charmtone, charmtone-light", themeName)
+		}
+
+		// Load current config
+		cwd, err := ResolveCwd(cmd)
+		if err != nil {
+			return err
+		}
+
+		dataDir, _ := cmd.Flags().GetString("data-dir")
+		debug, _ := cmd.Flags().GetBool("debug")
+
+		cfg, err := config.Init(cwd, dataDir, debug)
+		if err != nil {
+			return fmt.Errorf("failed to load config: %w", err)
+		}
+
+		// Set the theme
+		if err := cfg.SetTheme(themeName); err != nil {
+			return fmt.Errorf("failed to set theme: %w", err)
+		}
+
+		fmt.Printf("Theme set to '%s'\n", themeName)
+		return nil
+	},
+}
+
+var themeCurrentCmd = &cobra.Command{
+	Use:   "current",
+	Short: "Show the current theme",
+	Long:  `Display the currently configured theme for the Crush TUI interface.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		// Load current config
+		cwd, err := ResolveCwd(cmd)
+		if err != nil {
+			return err
+		}
+
+		dataDir, _ := cmd.Flags().GetString("data-dir")
+		debug, _ := cmd.Flags().GetBool("debug")
+
+		cfg, err := config.Init(cwd, dataDir, debug)
+		if err != nil {
+			return fmt.Errorf("failed to load config: %w", err)
+		}
+
+		currentTheme := cfg.GetTheme()
+		fmt.Printf("Current theme: %s\n", currentTheme)
+		return nil
+	},
+}
+
+func init() {
+	themeCmd.AddCommand(themeListCmd)
+	themeCmd.AddCommand(themeSetCmd)
+	themeCmd.AddCommand(themeCurrentCmd)
+	rootCmd.AddCommand(themeCmd)
+}