1 files changed, 84 insertions, 0 deletions
diff --git a/vk/tracking/status.py b/vk/tracking/status.py
index a16a34e..0a02413 100644
--- a/vk/tracking/status.py
+++ b/vk/tracking/status.py
@@ -3,13 +3,17 @@
 # For details, see https://github.com/egor-tensin/vk-scripts.
 # Distributed under the MIT License.
 
+import argparse
 from collections.abc import Callable
 import contextlib
 import time
 import signal
+import sys
 
+from vk.api import API
 import vk.error
 from vk.user import UserField
+from vk.tracking.db import Format as DatabaseFormat
 
 
 class StatusTracker:
@@ -137,3 +141,83 @@ class StatusTracker:
                 self._do_loop(uids)
             except (KeyboardInterrupt, StatusTracker.StopLooping):
                 pass
+
+
+DEFAULT_TIMEOUT = StatusTracker.DEFAULT_TIMEOUT
+DEFAULT_DB_FORMAT = DatabaseFormat.CSV
+
+
+def _parse_positive_integer(s):
+    try:
+        n = int(s)
+    except ValueError:
+        raise argparse.ArgumentTypeError('must be a positive integer: ' + s)
+    if n < 1:
+        raise argparse.ArgumentTypeError('must be a positive integer: ' + s)
+    return n
+
+
+def _parse_database_format(s):
+    try:
+        return DatabaseFormat(s)
+    except ValueError:
+        raise argparse.ArgumentTypeError('invalid database format: ' + s)
+
+
+def _parse_args(args=None):
+    if args is None:
+        args = sys.argv[1:]
+
+    parser = argparse.ArgumentParser(
+        description='Track when people go online/offline.')
+
+    parser.add_argument('uids', metavar='UID', nargs='+',
+                        help='user IDs or "screen names"')
+    parser.add_argument('-t', '--timeout', metavar='SECONDS',
+                        type=_parse_positive_integer,
+                        default=DEFAULT_TIMEOUT,
+                        help='set refresh interval')
+    parser.add_argument('-O', '--only-once', action='store_true',
+                        help='query the status only once and exit')
+    parser.add_argument('-l', '--log', metavar='PATH', dest='log_path',
+                        help='set log file path (standard output by default)')
+    parser.add_argument('-f', '--format', dest='db_fmt',
+                        type=_parse_database_format,
+                        choices=DatabaseFormat,
+                        default=DEFAULT_DB_FORMAT,
+                        help='specify database format')
+    parser.add_argument('-o', '--output', metavar='PATH', dest='db_path',
+                        help='set database file path')
+
+    return parser.parse_args(args)
+
+
+def track_status(
+        uids, timeout=DEFAULT_TIMEOUT, log_path=None,
+        db_path=None, db_fmt=DEFAULT_DB_FORMAT, only_once=False):
+
+    api = API()
+    tracker = StatusTracker(api, timeout)
+
+    if db_fmt is DatabaseFormat.LOG or db_path is None:
+        db_fmt = DatabaseFormat.NULL
+
+    with DatabaseFormat.LOG.open_output_file(log_path) as log_fd:
+        log_writer = DatabaseFormat.LOG.create_writer(log_fd)
+        tracker.add_database_writer(log_writer)
+        with db_fmt.open_output_file(db_path) as db_fd:
+            db_writer = db_fmt.create_writer(db_fd)
+            tracker.add_database_writer(db_writer)
+
+            if only_once:
+                tracker.query_status(uids)
+            else:
+                tracker.loop(uids)
+
+
+def main(args=None):
+    track_status(**vars(_parse_args(args)))
+
+
+if __name__ == '__main__':
+    main()