From 5d9f1fcc26d9090e2250fc39543dbff00abf8d3a Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Fri, 17 Jun 2016 06:32:46 +0300
Subject: add basic "online periods" extraction

---
 vk/utils/tracking/__init__.py              |  3 +-
 vk/utils/tracking/db/record.py             | 13 ++++++-
 vk/utils/tracking/online_periods.py        | 59 ++++++++++++++++++++++++++++++
 vk/utils/tracking/utils/how_much_online.py |  6 ++-
 4 files changed, 76 insertions(+), 5 deletions(-)
 create mode 100644 vk/utils/tracking/online_periods.py

(limited to 'vk/utils')

diff --git a/vk/utils/tracking/__init__.py b/vk/utils/tracking/__init__.py
index 2e8b02e..8934d94 100644
--- a/vk/utils/tracking/__init__.py
+++ b/vk/utils/tracking/__init__.py
@@ -2,6 +2,7 @@
 # This file is licensed under the terms of the MIT License.
 # See LICENSE.txt for details.
 
+from .online_periods import OnlinePeriodEnumerator
 from .status_tracker import StatusTracker
 
-__all__ = 'status_tracker',
+__all__ =  'online_periods', 'status_tracker',
diff --git a/vk/utils/tracking/db/record.py b/vk/utils/tracking/db/record.py
index fd684cc..fd276fc 100644
--- a/vk/utils/tracking/db/record.py
+++ b/vk/utils/tracking/db/record.py
@@ -102,14 +102,23 @@ class Record(MutableMapping):
                 assert False
         return record
 
+    def _update_last_seen_field(self, last_seen, field):
+        if field is LastSeenField.TIME:
+            last_seen[field] = self[field].dt
+        else:
+            last_seen[field] = self[field]
+
+    def _update_user_field(self, user, field):
+        user[field] = self[field]
+
     def to_user(self):
         user = User()
         last_seen = LastSeen()
         for field in self:
             if isinstance(field, LastSeenField):
-                last_seen[field] = self[field]
+                self._update_last_seen_field(last_seen, field)
             elif isinstance(field, UserField):
-                user[field] = self[field]
+                self._update_user_field(user, field)
             else:
                 assert False
         if len(last_seen):
diff --git a/vk/utils/tracking/online_periods.py b/vk/utils/tracking/online_periods.py
new file mode 100644
index 0000000..9a99863
--- /dev/null
+++ b/vk/utils/tracking/online_periods.py
@@ -0,0 +1,59 @@
+# 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.abc import MutableMapping
+
+from vk.user import User
+
+class OnlinePeriodEnumerator(MutableMapping):
+    def __init__(self):
+        self._records_by_user = {}
+
+    def __getitem__(self, key):
+        return self._records_by_user[self._normalize_key(key)]
+
+    def __setitem__(self, key, value):
+        self._records_by_user[self._normalize_key(key)] = value
+
+    def __delitem__(self, key):
+        del self._records_by_user[self._normalize_key(key)]
+
+    def __iter__(self):
+        return iter(self._records_by_user)
+
+    def __len__(self):
+        return len(self._records_by_user)
+
+    @staticmethod
+    def _normalize_key(key):
+        return key.get_uid() if isinstance(key, User) else key
+
+    def enum(self, db_reader):
+        for record in db_reader:
+            period = self._insert_record(record)
+            #print(period)
+            if period is not None:
+                yield period
+
+    def _insert_record(self, record):
+        return self._insert_user(record.to_user())
+
+    def _known_user(self, user):
+        return user.get_uid() in self._records_by_user
+
+    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
+            #print(2)
+            return None
+        if user.is_online():
+            #print(3)
+            print(user._fields)
+            return None
+        period = user, self[user].get_last_seen_time(), user.get_last_seen_time()
+        self[user] = user
+        return period
diff --git a/vk/utils/tracking/utils/how_much_online.py b/vk/utils/tracking/utils/how_much_online.py
index c1cf05f..2526f76 100644
--- a/vk/utils/tracking/utils/how_much_online.py
+++ b/vk/utils/tracking/utils/how_much_online.py
@@ -2,6 +2,7 @@
 # This file is licensed under the terms of the MIT License.
 # See LICENSE.txt for details.
 
+from vk.utils.tracking import OnlinePeriodEnumerator
 from vk.utils.tracking.db.reader import *
 
 if __name__ == '__main__':
@@ -14,5 +15,6 @@ if __name__ == '__main__':
     args = parser.parse_args()
 
     with csv.Reader(args.input) as csv_reader:
-        for record in csv_reader:
-            print(record.get_timestamp())
+        for online_period in OnlinePeriodEnumerator().enum(csv_reader):
+            user, dt_from, dt_to = online_period
+            print(user.get_screen_name(), dt_from.isoformat(), dt_to.isoformat())
-- 
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