'''Implements queries to the Github API using GraphQL

def __init__(self, token, max_page_size=100, min_page_size=5):

self._token = token

self._max_page_size = max_page_size

self._min_page_size = min_page_size

_MEMBERS = '''

def get_members(self, organization, team):

'''Get all team members for organization

logins = []

not_end = True

query = Query._MEMBERS.format(organization=organization,

team=team,

max_page_size=self._max_page_size,

next='')

while not_end:

result = self._run(query)['organization']['team']

if result is None:

break

result = result['members']

not_end = result['pageInfo']['hasNextPage']

query = Query._MEMBERS.format(organization=organization,

team=team,

max_page_size=self._max_page_size,

next=f'after: "{result["pageInfo"]["endCursor"]}"')

logins += [node['login'] for node in result['nodes']]

return logins

_LABELS = '''

def get_labels(self, pull_request):

'''Fetchs all labels for given pull-request

labels = [label for label in pull_request['labels']['nodes']]

not_end = pull_request['labels']['pageInfo']['hasNextPage']

query = Query._LABELS.format(number = pull_request['number'],

max_page_size = self._max_page_size,

next=f'after: "{pull_request["labels"]["pageInfo"]["endCursor"]}"')

while not_end:

result = self._run(query)['repository']['pullRequest']['labels']

not_end = result['pageInfo']['hasNextPage']

query = Query._LABELS.format(number=pull_request['number'],

max_page_size=self._max_page_size,

next=f'after: "{result["pageInfo"]["endCursor"]}"')

labels += [label for label in result['nodes']]

return labels

_TIMELINE = '''

def get_timeline(self, pull_request):

'''Fetchs all cross-reference events from pull-request's timeline

events = [event for event in pull_request['timeline']['nodes'] if event and event['source']]

not_end = pull_request['timeline']['pageInfo']['hasNextPage']

query = Query._TIMELINE.format(number = pull_request['number'],

max_page_size = self._max_page_size,

next=f'after: "{pull_request["timeline"]["pageInfo"]["endCursor"]}"')

while not_end:

result = self._run(query)['repository']['pullRequest']['timeline']

not_end = result['pageInfo']['hasNextPage']

query = Query._TIMELINE.format(number=pull_request['number'],

max_page_size=self._max_page_size,

next=f'after: "{result["pageInfo"]["endCursor"]}"')

events += [event for event in result['nodes'] if event and event['source']]

return events

_PULL_REQUESTS = '''

def get_pull_requests(self, before_commit, login):

'''Get all merged pull-requests from the HEAD of default branch to the last commit (excluding)

pull_requests = []

not_end = True

query = Query._PULL_REQUESTS.format(max_page_size=self._max_page_size,

min_page_size=self._min_page_size,

next='')

while not_end:

result = self._run(query)['repository']['defaultBranchRef']

default_branch_name = result['name']

result = result['target']['history']

not_end = result['pageInfo']['hasNextPage']

query = Query._PULL_REQUESTS.format(max_page_size=self._max_page_size,

min_page_size=self._min_page_size,

next=f'after: "{result["pageInfo"]["endCursor"]}"')

for commit in result['nodes']:

if str(commit['oid']) == str(before_commit):

not_end = False

break

# TODO: fetch all pull-requests that were merged in a single commit.

assert commit['associatedPullRequests']['totalCount'] <= self._min_page_size, \

f'there are {commit["associatedPullRequests"]["totalCount"]} pull-requests merged in commit {commit["oid"]}'

for pull_request in commit['associatedPullRequests']['nodes']:

if(pull_request['baseRepository']['nameWithOwner'] == 'yandex/ClickHouse' and

pull_request['baseRefName'] == default_branch_name and

pull_request['mergeCommit']['oid'] == commit['oid'] and

(not login or pull_request['author']['login'] == login)):

pull_requests.append(pull_request)

return pull_requests

_DEFAULT = '''

def get_default_branch(self):

'''Get short name of the default branch

return self._run(Query._DEFAULT)['repository']['defaultBranchRef']['name']

def _run(self, query):

from requests.adapters import HTTPAdapter

from urllib3.util.retry import Retry

def requests_retry_session(

retries=3,

backoff_factor=0.3,

status_forcelist=(500, 502, 504),

session=None,

):

session = session or requests.Session()

retry = Retry(

total=retries,

read=retries,

connect=retries,

backoff_factor=backoff_factor,

status_forcelist=status_forcelist,

)

adapter = HTTPAdapter(max_retries=retry)

session.mount('http://', adapter)

session.mount('https://', adapter)

return session

headers = {'Authorization': f'bearer {self._token}'}

request = requests_retry_session().post('https://api.github.com/graphql', json={'query': query}, headers=headers)

if request.status_code == 200:

result = request.json()

if 'errors' in result:

raise Exception(f'Errors occured: {result["errors"]}')

return result['data']

else:

import json