1 files changed, 140 insertions, 0 deletions
diff --git a/vk/tracking/online_streaks.py b/vk/tracking/online_streaks.py
new file mode 100644
index 0000000..5c9aa48
--- /dev/null
+++ b/vk/tracking/online_streaks.py
@@ -0,0 +1,140 @@
+# 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, date_from=None, date_to=None):
+        self._records = {}
+        self._date_from = date_from
+        self._date_to = date_to
+
+    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 _cut_period(self, streak):
+        user, time_from, time_to = streak
+        #print(user.get_first_name(), time_from, self._date_from)
+        if self._date_from is not None:
+            if time_to < self._date_from:
+                #print(1)
+                return None
+            if time_from < self._date_from:
+                #print(2)
+                time_from = self._date_from
+        if self._date_to is not None:
+            if time_from > self._date_to:
+                #print(3)
+                return None
+            if time_to > self._date_to:
+                #print(4)
+                time_to = self._date_to
+        return user, time_from, time_to
+
+    def enum(self, db_reader):
+        for record in db_reader:
+            streak = self._insert_record(record)
+            if streak is not None:
+                streak = self._cut_period(streak)
+            if streak is not None:
+                yield streak
+
+    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
+
+    def group_by_hour(self, db_reader):
+        by_hour = OrderedDict()
+        for i in range(24):
+            by_hour[i] = timedelta()
+        for _, time_from, time_to in self.enum(db_reader):
+            for hour, duration in self._enum_hours_and_durations(time_from, time_to):
+                by_hour[hour] += duration
+        return by_hour
+
+    @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
+
+    @staticmethod
+    def _enum_hours_and_durations(time_from, time_to):
+        while time_from.date() != time_to.date() or time_from.hour != time_to.hour:
+            next_hour = time_from.replace(minute=0, second=0) + timedelta(hours=1)
+            yield time_from.hour, next_hour - time_from
+            time_from = next_hour
+        yield time_to.hour, 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
+        streak = user, self[user].get_last_seen_time(), user.get_last_seen_time()
+        self[user] = user
+        return streak