vk: move file i/o to a separate module

1 files changed, 4 insertions, 10 deletions

diff --git a/vk/tracking/db/backend/csv.py b/vk/tracking/db/backend/csv.py
index e607774..5b2cc7d 100644
--- a/vk/tracking/db/backend/csv.py
+++ b/vk/tracking/db/backend/csv.py
@@ -4,23 +4,20 @@
 # Distributed under the MIT License.
 
 from collections.abc import Iterable
-import csv
 
+from ..io import InputReaderCSV, OutputWriterCSV
 from ..record import Record
 from ..timestamp import Timestamp
 
 class Writer:
     def __init__(self, fd):
-        self._fd = fd
-        self._writer = csv.writer(fd, lineterminator='\n')
+        self._writer = OutputWriterCSV(fd)
 
     def on_initial_status(self, user):
         self._write_record(user)
-        self._fd.flush()
 
     def on_status_update(self, user):
         self._write_record(user)
-        self._fd.flush()
 
     def on_connection_error(self, e):
         pass
@@ -28,10 +25,7 @@ class Writer:
     def _write_record(self, user):
         if not self:
             return
-        self._write_row(self._record_to_row(Record.from_user(user)))
-
-    def _write_row(self, row):
-        self._writer.writerow(row)
+        self._writer.write_row(self._record_to_row(Record.from_user(user)))
 
     @staticmethod
     def _record_to_row(record):
@@ -39,7 +33,7 @@ class Writer:
 
 class Reader(Iterable):
     def __init__(self, fd):
-        self._reader = csv.reader(fd)
+        self._reader = InputReaderCSV(fd)
 
     def __iter__(self):
         return map(Reader._record_from_row, self._reader)