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# Copyright 2016 Egor Tensin <Egor.Tensin@gmail.com>
# This file is licensed under the terms of the MIT License.
# See LICENSE.txt for details.
from collections import OrderedDict
from collections.abc import MutableMapping
from datetime import timedelta
from enum import Enum
from vk.user import User
class Weekday(Enum):
MONDAY = 0
TUESDAY = 1
WEDNESDAY = 2
THURSDAY = 3
FRIDAY = 4
SATURDAY = 5
SUNDAY = 6
def __str__(self):
return self.name[0] + self.name[1:].lower()
class OnlineStreakEnumerator(MutableMapping):
def __init__(self):
self._records = {}
def __getitem__(self, user):
return self._records[user]
def __setitem__(self, user, record):
self._records[user] = record
def __delitem__(self, user):
del self._records[user]
def __iter__(self):
return iter(self._records)
def __len__(self):
return len(self._records)
def enum(self, db_reader):
for record in db_reader:
period = self._insert_record(record)
if period is not None:
yield period
def group_by_user(self, db_reader):
by_user = {}
for user, time_from, time_to in self.enum(db_reader):
if user not in by_user:
by_user[user] = timedelta()
by_user[user] += time_to - time_from
return by_user
def group_by_date(self, db_reader):
by_date = OrderedDict()
for _, time_from, time_to in self.enum(db_reader):
for date, duration in self._enum_dates_and_durations(time_from, time_to):
if date not in by_date:
by_date[date] = timedelta()
by_date[date] += duration
return by_date
def group_by_weekday(self, db_reader):
by_weekday = OrderedDict()
for weekday in Weekday:
by_weekday[weekday] = timedelta()
for _, time_from, time_to in self.enum(db_reader):
for date, duration in self._enum_dates_and_durations(time_from, time_to):
by_weekday[Weekday(date.weekday())] += duration
return by_weekday
@staticmethod
def _enum_dates_and_durations(time_from, time_to):
while time_from.date() != time_to.date():
next_day = time_from.date() + timedelta(days=1)
yield time_from.date(), next_day - time_from
time_from = next_day
yield time_to.date(), time_to - time_from
def _insert_record(self, record):
return self._insert_user(record.to_user())
def _known_user(self, user):
return user.get_uid() in self._records
def _unknown_user(self, user):
return not self._known_user(user)
def _insert_user(self, user):
if user not in self or self[user].is_offline():
self[user] = user
return None
if user.is_online():
return None
period = user, self[user].get_last_seen_time(), user.get_last_seen_time()
self[user] = user
return period
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