1 files changed, 98 insertions, 0 deletions
diff --git a/vk/tracking/db/record.py b/vk/tracking/db/record.py
new file mode 100644
index 0000000..93be97c
--- /dev/null
+++ b/vk/tracking/db/record.py
@@ -0,0 +1,98 @@
+# 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 datetime
+
+from .timestamp import Timestamp
+from vk.user import LastSeen, LastSeenField, User, UserField
+
+class Record(MutableMapping):
+    FIELDS = (
+        UserField.UID,
+        UserField.FIRST_NAME,
+        UserField.LAST_NAME,
+        UserField.SCREEN_NAME,
+        UserField.ONLINE,
+        LastSeenField.TIME,
+        LastSeenField.PLATFORM,
+    )
+
+    def __init__(self, timestamp=None, fields=None):
+        if timestamp is None:
+            timestamp = Timestamp()
+        if fields is None:
+            fields = OrderedDict()
+        self._timestamp = timestamp
+        self._fields = fields
+
+    def __getitem__(self, field):
+        if field is LastSeenField.TIME:
+            return Timestamp(self._fields[field])
+        return self._fields[field]
+
+    def __setitem__(self, field, value):
+        if field is LastSeenField.TIME:
+            if isinstance(value, str):
+                value = Timestamp.from_string(value).dt
+            elif isinstance(value, Timestamp):
+                value = value.dt
+            elif isinstance(value, datetime):
+                pass
+            else:
+                raise TypeError()
+        if isinstance(field, LastSeenField):
+            self._fields[field] = LastSeen.parse(field, value)
+        elif isinstance(field, UserField):
+            self._fields[field] = User.parse(field, value)
+        else:
+            raise TypeError()
+
+    def __delitem__(self, field):
+        del self._fields[field]
+
+    def __iter__(self):
+        return iter(self._fields)
+
+    def __len__(self):
+        return len(self._fields)
+
+    def get_timestamp(self):
+        return self._timestamp
+
+    @staticmethod
+    def from_user(user):
+        record = Record()
+        for field in Record.FIELDS:
+            if isinstance(field, UserField):
+                record[field] = user[field]
+            elif isinstance(field, LastSeenField):
+                record[field] = user.get_last_seen()[field]
+            else:
+                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):
+                self._update_last_seen_field(last_seen, field)
+            elif isinstance(field, UserField):
+                self._update_user_field(user, field)
+            else:
+                assert False
+        if len(last_seen):
+            user.set_last_seen(last_seen)
+        return user