def get_menus(self):
"""Return a list of Menu objects in reverse-chronological order.
This function checks for new menu data from the API. Obviously, this
has no effect if `DEV_MENU_DATA` is True. (See config.py.)
"""
# Update self._menus.
menu_data = fetch.menu_data()
for menu_datum in menu_data:
self._process_menu(menu_datum)
# Return a shallow copy.
return self._menus[:]
def __init__(self):
"""Create a MenuCache.
Calls `menu.fetch.menu_data()` to get the unprocessed menu data and
then constructs a list of Menu objects from the data, caching the
'menuId' members of the unprocessed data to avoid processing any menu
twice.
"""
menu_data = fetch.menu_data()
self._processed = set()
# If the menu data happens to be empty, init self._menus and return
if len(menu_data) == 0:
self._menus = []
return
# Reserve space the size of the menu_data, since it can be no larger
# than that.
self._menus = [None] * len(menu_data)
# Process and insert the first menu so we don't get IndexErrors
first_menu_datum = menu_data[0]
self._processed.add(first_menu_datum['menuId'])
self._menus[0] = menu.Menu(first_menu_datum)
# Indicates the first unoccupied spot in the list
first_open = 1
for m in menu_data[1:]:
# Cache processed menu IDs
self._processed.add(m['menuId'])
new_menu = menu.Menu(m)
# If the dates aren't equal, put the new menu at the end
if self._menus[first_open - 1].date != new_menu.date:
self._menus[first_open] = new_menu
first_open += 1
continue
# Else, compare the updated_at fields
self._store_updated_menu(first_open - 1, new_menu)
# Slice out the extra space in this list
self._menus = self._menus[:first_open]
