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# Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "VK scripts" project.
# For details, see https://github.com/egor-tensin/vk-scripts.
# Distributed under the MIT License.
import argparse
import sys
from vk.api import API
from vk.tracking import StatusTracker
from vk.tracking.db import Format as DatabaseFormat
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('-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):
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)
tracker.loop(uids)
def main(args=None):
track_status(**vars(_parse_args(args)))
if __name__ == '__main__':
main()
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