1 files changed, 97 insertions, 0 deletions
diff --git a/vk/last_seen.py b/vk/last_seen.py
new file mode 100644
index 0000000..9f0c650
--- /dev/null
+++ b/vk/last_seen.py
@@ -0,0 +1,97 @@
+# 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, timezone
+from enum import Enum
+from numbers import Integral, Real
+
+from .platform import Platform
+
+def _parse_time(x):
+    if isinstance(x, datetime):
+        if x.tzinfo is None or x.tzinfo.utcoffset(x) is None:
+            x = x.replace(tzinfo=timezone.utc)
+        return x
+    elif isinstance(x, Real) or isinstance(x, Integral):
+        return datetime.fromtimestamp(x, tz=timezone.utc)
+    else:
+        raise TypeError()
+
+def _parse_platform(x):
+    if x in Platform:
+        return x
+    if isinstance(x, str):
+        return Platform.from_string(x)
+    else:
+        return Platform(x)
+
+class LastSeenField(Enum):
+    TIME = 'time'
+    PLATFORM = 'platform'
+
+    def __str__(self):
+        return self.value
+
+class LastSeen(MutableMapping):
+    @staticmethod
+    def from_api_response(source):
+        instance = LastSeen()
+        for field in LastSeenField:
+            if str(field) in source:
+                instance[field] = source[str(field)]
+        return instance
+
+    def __init__(self, fields=None):
+        if fields is None:
+            fields = OrderedDict()
+        self._fields = fields
+
+    def __getitem__(self, field):
+        return self._fields[field]
+
+    def __setitem__(self, field, value):
+        self._fields[field] = self.parse(field, value)
+
+    def __delitem__(self, field):
+        del self._fields[field]
+
+    def __iter__(self):
+        return iter(self._fields)
+
+    def __len__(self):
+        return len(self._fields)
+
+    @staticmethod
+    def parse(field, value):
+        if field in LastSeen._FIELD_PARSERS:
+            return LastSeen._FIELD_PARSERS[field](value)
+        else:
+            return LastSeen._DEFAULT_FIELD_PARSER(value)
+
+    _FIELD_PARSERS = {
+        LastSeenField.TIME: _parse_time,
+        LastSeenField.PLATFORM: _parse_platform,
+    }
+
+    _DEFAULT_FIELD_PARSER = str
+
+    def has_time(self):
+        return LastSeenField.TIME in self
+
+    def get_time(self):
+        return self[LastSeenField.TIME]
+
+    def set_time(self, t):
+        self[LastSeenField.TIME] = t
+
+    def has_platform(self):
+        return LastSeenField.PLATFORM in self
+
+    def get_platform(self):
+        return self[LastSeenField.PLATFORM]
+
+    def set_platform(self, platform):
+        self[LastSeenField.PLATFORM] = platform