label_printer/file_handler.py

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import random
import os
import shutil
import time
user_data_lifetime_seconds = 2*60*60
data_path = "user_data"
users = dict([])
if os.path.exists(data_path):
shutil.rmtree(data_path)
def delete_old_users(session):
for ID in users.copy():
elapsed = time.time() - users[ID]["last accessed"]
if (elapsed > user_data_lifetime_seconds):
print(ID, "Hasn't accessed their files in", elapsed, "seconds, removing all user data")
shutil.rmtree(users[ID]["path"])
del users[ID]
new_user_handler_func = None
def new_user_handler(func):
global new_user_handler_func
new_user_handler_func = func
return func
def new_user(session):
while(True):
ID = random.randint(0, 100000000)
if not ID in users:
break
users[ID] = {
"path": data_path + "/" + str(ID),
"last accessed": time.time()
}
session["ID"] = ID
os.makedirs(users[session["ID"]]["path"])
if new_user_handler_func:
new_user_handler_func(session)
def get_file_path(session, filename):
return os.path.join(get_folder_path(session), filename)
def file_exists(session, filename):
return os.path.exists(get_file_path(session, filename))
def check_for_new_user(session):
if not "ID" in session:
new_user(session)
elif not session["ID"] in users:
new_user(session)
delete_old_users(session)
def get_folder_path(session):
check_for_new_user(session)
ID = session["ID"]
user = users[ID]
user["last accessed"] = time.time()
return user["path"]