audio-ui/lib/history/command.ts

/**
 * Command Pattern for Undo/Redo System
 */

export interface Command {
  /**
   * Execute the command
   */
  execute(): void;

  /**
   * Undo the command
   */
  undo(): void;

  /**
   * Redo the command (default: call execute again)
   */
  redo(): void;

  /**
   * Get a description of the command for UI display
   */
  getDescription(): string;
}

/**
 * Base command class with default redo implementation
 */
export abstract class BaseCommand implements Command {
  abstract execute(): void;
  abstract undo(): void;
  abstract getDescription(): string;

  redo(): void {
    this.execute();
  }
}