1. class TaskQueue {
  2. constructor(tasks) {
  3. this.tasks = tasks || []; // Array of tasks
  4. this.queue = [...tasks]; // Create a copy for the queue
  5. this.dryRun = true; // Default to dry-run mode
  6. this.taskIndex = 0; // index of the current task
  7. }
  9. /**
  10. * Adds a task to the queue.
  11. * @param {Function} task The task to be added.
  12. */
  13. addTask(task) {
  14. this.queue.push(task);
  15. }
  17. /**
  18. * Processes the next task in the queue.
  19. */
  20. processTask() {
  21. if (this.dryRun) {
  22. console.log("Dry run: Would execute task at index:", this.taskIndex);
  23. return;
  24. }
  26. if (this.taskIndex < this.queue.length) {
  27. const task = this.queue[this.taskIndex];
  28. console.log("Executing task:", this.taskIndex + 1); // log task index
  29. try {
  30. task(); // Execute the task
  31. } catch (error) {
  32. console.error("Error executing task:", error);
  33. }
  34. this.taskIndex++;
  35. this.processTask(); // Process the next task
  36. } else {
  37. console.log("All tasks completed.");
  38. }
  39. }
  41. /**
  42. * Sets the dry-run mode.
  43. * @param {boolean} dryRun True for dry-run, false for actual execution.
  44. */
  45. setDryRun(dryRun) {
  46. this.dryRun = dryRun;
  47. }
  49. /**
  50. * Gets the current queue.
  51. * @returns {Array<Function>} The current queue of tasks.
  52. */
  53. getQueue() {
  54. return [...this.queue]; // return a copy to prevent modification
  55. }
  56. }
  58. // Example usage:
  59. // const tasks = [
  60. // () => console.log("Task 1: Performing maintenance"),
  61. // () => console.log("Task 2: Checking system logs"),
  62. // () => console.log("Task 3: Applying security patches"),
  63. // ];
  64. // const queue = new TaskQueue(tasks);
  66. // queue.setDryRun(true); // Set to dry-run mode
  67. // queue.processTask(); // Dry run output
  69. // queue.setDryRun(false); // Set to actual execution mode
  70. // queue.processTask(); // Execute tasks

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