4 files changed, 72 insertions, 0 deletions
diff --git a/vk/utils/tracking/db/__init__.py b/vk/utils/tracking/db/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/vk/utils/tracking/db/__init__.py
diff --git a/vk/utils/tracking/db/record.py b/vk/utils/tracking/db/record.py
new file mode 100644
index 0000000..0a1a687
--- /dev/null
+++ b/vk/utils/tracking/db/record.py
@@ -0,0 +1,27 @@
+# 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 datetime import datetime
+
+from vk.user import Field
+
+class Record:
+    _FIELDS = (
+        Field.UID,
+        Field.FIRST_NAME,
+        Field.LAST_NAME,
+        Field.SCREEN_NAME,
+        Field.ONLINE,
+        Field.LAST_SEEN,
+    )
+
+    def __init__(self, user):
+        self._fields = OrderedDict()
+        for field in self._FIELDS:
+            self._fields[field] = user[field]
+        self._timestamp = datetime.utcnow().replace(microsecond=0)
+
+    def to_list(self):
+        return [self._timestamp.isoformat()] + list(self._fields.values())
diff --git a/vk/utils/tracking/db/writer/__init__.py b/vk/utils/tracking/db/writer/__init__.py
new file mode 100644
index 0000000..330d5a8
--- /dev/null
+++ b/vk/utils/tracking/db/writer/__init__.py
@@ -0,0 +1,5 @@
+# Copyright 2016 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is licensed under the terms of the MIT License.
+# See LICENSE.txt for details.
+
+__all__ = 'csv',
diff --git a/vk/utils/tracking/db/writer/csv.py b/vk/utils/tracking/db/writer/csv.py
new file mode 100644
index 0000000..4594e09
--- /dev/null
+++ b/vk/utils/tracking/db/writer/csv.py
@@ -0,0 +1,40 @@
+# Copyright 2016 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is licensed under the terms of the MIT License.
+# See LICENSE.txt for details.
+
+import csv
+from datetime import datetime
+
+from ..record import Record
+
+class Writer:
+    def __init__(self, path, mode='w'):
+        if path is None:
+            self._fd = None
+        else:
+            self._fd = open(path, mode)
+            self._writer = csv.writer(self._fd, lineterminator='\n')
+
+    def _is_valid(self):
+        return self._fd is not None
+
+    def __enter__(self):
+        if not self._is_valid():
+            return None
+        self._fd.__enter__()
+        return self
+
+    def __exit__(self, *args):
+        if self._is_valid():
+            self._fd.__exit__(*args)
+
+    def flush(self):
+        if self._is_valid():
+            self._fd.flush()
+
+    def write_record(self, user):
+        self._write_row(Record(user).to_list())
+        self.flush()
+
+    def _write_row(self, row):
+        self._writer.writerow(row)