1. import time
  2. import hashlib
  3. import json
  4. import sys
  5. from typing import Dict, Any
  8. class FormChangeMonitor:
  9. def __init__(self, form_data: Dict[str, Any], interval: int = 1):
  10. """
  11. Initializes the FormChangeMonitor.
  13. Args:
  14. form_data: The initial state of the form.
  15. interval: The interval (in seconds) to check for changes.
  16. """
  17. self.form_data = form_data
  18. self.interval = interval
  19. self.previous_hash = self._calculate_hash(form_data)
  21. def _calculate_hash(self, data: Dict[str, Any]) -> str:
  22. """Calculates a hash of the form data."""
  23. data_string = json.dumps(data, sort_keys=True).encode('utf-8')
  24. return hashlib.sha256(data_string).hexdigest()
  26. def check_changes(self) -> Dict[str, Any]:
  27. """
  28. Checks for changes in the form data.
  30. Returns:
  31. The updated form data if changes are detected, otherwise None.
  32. """
  33. try:
  34. current_data = self.form_data # Get the current form data
  35. current_hash = self._calculate_hash(current_data)
  37. if current_hash != self.previous_hash:
  38. self.previous_hash = current_hash
  39. print("Form data changed!")
  40. return current_data
  41. else:
  42. return None # No changes
  43. except Exception as e:
  44. print(f"Error during change check: {e}")
  45. return None
  47. def run(self):
  48. """Runs the monitoring loop."""
  49. while True:
  50. updated_data = self.check_changes()
  51. if updated_data:
  52. self.form_data = updated_data # Update the form data
  53. print("Updated form data:", updated_data)
  54. time.sleep(self.interval)
  57. if __name__ == '__main__':
  58. # Example usage:
  59. initial_form_data = {"name": "Alice", "age": 30, "city": "New York"}
  60. monitor = FormChangeMonitor(initial_form_data, interval=2)
  61. monitor.run()

Add your comment