Pseudocode for check file thingy

script.pseudo

function does_file_exist(filename):
	...
  
function get_modified_at(filename):
	...

function print_file_is_deleted(filename):
	...
  
function print_file_is_created(filename):
 	...
  
function print_file_modified(filename):
	...

# Get from command line arguments
filename = ...
sleep_interval = ...

file_exists = does_file_exist(filename)
last_modified_at = get_modified_at(filename)

while True:
	does_file_exist_now = does_file_exist(filename)
	if does_file_exist_now and not file_exists:
		print_file_is_created(filename)
		file_exists = True
	elif not does_file_exist_now and file_exists:
		print_file_is_deleted(filename)
		file_exists = False
	elif file_exists:
		new_modified_at = get_modified_at(filename)
		if new_modified_at != last_modified_at:
			print_file_modified(filename, new_modified_at)
			last_modified_at = new_modified_at
	sleep(sleep_interval)