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# Copyright 2015 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
import csv
from enum import Enum
import json
import sys
import vk.api
from vk.user import Field
def query_friend_list(api, user):
return api.friends_get(user.get_uid(), fields=Field.SCREEN_NAME)
OUTPUT_FIELDS = Field.UID, Field.FIRST_NAME, Field.LAST_NAME, Field.SCREEN_NAME
def extract_output_fields(user):
new_user = OrderedDict()
for field in OUTPUT_FIELDS:
new_user[str(field)] = user[field] if field in user else None
return new_user
def print_mutual_friends_csv(mutual_friends):
writer = csv.writer(sys.stdout, lineterminator='\n')
for user in mutual_friends:
user = extract_output_fields(user)
writer.writerow(user.values())
def print_mutual_friends_json(mutual_friends):
print(json.dumps([extract_output_fields(user) for user in mutual_friends], indent=3))
def print_mutual_friends(mutual_friends, output_format):
if output_format is OutputFormat.CSV:
print_mutual_friends_csv(mutual_friends)
elif output_format is OutputFormat.JSON:
print_mutual_friends_json(mutual_friends)
else:
raise NotImplementedError('unsupported output format: ' + str(output_format))
class OutputFormat(Enum):
CSV = 'csv'
JSON = 'json'
def __str__(self):
return self.value
if __name__ == '__main__':
import argparse
def output_format(s):
try:
return OutputFormat(s)
except ValueError:
raise argparse.ArgumentError()
parser = argparse.ArgumentParser(
description='Learn who your ex and her new boyfriend are both friends with.')
parser.add_argument(metavar='UID', dest='uids', nargs='+',
help='user IDs or "screen names"')
parser.add_argument('-f', '--format', type=output_format,
choices=tuple(x for x in OutputFormat),
default=OutputFormat.CSV,
help='specify output format')
args = parser.parse_args()
api = vk.api.API(vk.api.Language.EN)
users = api.users_get(args.uids, fields=Field.SCREEN_NAME)
friend_lists = map(lambda user: frozenset(query_friend_list(api, user)), users)
mutual_friends = frozenset.intersection(*friend_lists)
print_mutual_friends(mutual_friends, args.format)
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