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# -*- coding: utf-8 -*-
# ########################## Copyrights and license ############################
# #
# Copyright 2012 Vincent Jacques <[email protected]> #
# Copyright 2012 Zearin <[email protected]> #
# Copyright 2013 AKFish <[email protected]> #
# Copyright 2013 Bill Mill <[email protected]> #
# Copyright 2013 Vincent Jacques <[email protected]> #
# Copyright 2013 davidbrai <[email protected]> #
# #
# This file is part of PyGithub. http://jacquev6.github.com/PyGithub/ #
# #
# PyGithub is free software: you can redistribute it and/or modify it under #
# the terms of the GNU Lesser General Public License as published by the Free #
# Software Foundation, either version 3 of the License, or (at your option) #
# any later version. #
# #
# PyGithub is distributed in the hope that it will be useful, but WITHOUT ANY #
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS #
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more #
# details. #
# #
# You should have received a copy of the GNU Lesser General Public License #
# along with PyGithub. If not, see <http://www.gnu.org/licenses/>. #
# #
# ##############################################################################
import github.GithubObject
class PaginatedListBase:
def __init__(self):
self.__elements = list()
def __getitem__(self, index):
assert isinstance(index, (int, slice))
if isinstance(index, (int, long)):
self.__fetchToIndex(index)
return self.__elements[index]
else:
return self._Slice(self, index)
def __iter__(self):
for element in self.__elements:
yield element
while self._couldGrow():
newElements = self._grow()
for element in newElements:
yield element
def _isBiggerThan(self, index):
return len(self.__elements) > index or self._couldGrow()
def __fetchToIndex(self, index):
while len(self.__elements) <= index and self._couldGrow():
self._grow()
def _grow(self):
newElements = self._fetchNextPage()
self.__elements += newElements
return newElements
class _Slice:
def __init__(self, theList, theSlice):
self.__list = theList
self.__start = theSlice.start or 0
self.__stop = theSlice.stop
self.__step = theSlice.step or 1
def __iter__(self):
index = self.__start
while not self.__finished(index):
if self.__list._isBiggerThan(index):
yield self.__list[index]
index += self.__step
else:
return
def __finished(self, index):
return self.__stop is not None and index >= self.__stop
class PaginatedList(PaginatedListBase):
"""
This class abstracts the `pagination of the API <http://developer.github.com/v3/#pagination>`_.
You can simply enumerate through instances of this class::
for repo in user.get_repos():
print repo.name
You can also index them or take slices::
second_repo = user.get_repos()[1]
first_repos = user.get_repos()[:10]
If you want to iterate in reversed order, just do::
for repo in user.get_repos().reversed:
print repo.name
And if you really need it, you can explicitely access a specific page::
some_repos = user.get_repos().get_page(0)
some_other_repos = user.get_repos().get_page(3)
"""
def __init__(self, contentClass, requester, firstUrl, firstParams, headers=None):
PaginatedListBase.__init__(self)
self.__requester = requester
self.__contentClass = contentClass
self.__firstUrl = firstUrl
self.__firstParams = firstParams or ()
self.__nextUrl = firstUrl
self.__nextParams = firstParams or {}
self.__headers = headers
if self.__requester.per_page != 30:
self.__nextParams["per_page"] = self.__requester.per_page
self._reversed = False
self.__totalCount = None
@property
def totalCount(self):
if not self.__totalCount:
self._grow()
return self.__totalCount
def _getLastPageUrl(self):
headers, data = self.__requester.requestJsonAndCheck(
"GET",
self.__firstUrl,
parameters=self.__nextParams,
headers=self.__headers
)
links = self.__parseLinkHeader(headers)
lastUrl = links.get("last")
return lastUrl
@property
def reversed(self):
r = PaginatedList(self.__contentClass, self.__requester, self.__firstUrl, self.__firstParams)
r.__reverse()
return r
def __reverse(self):
self._reversed = True
lastUrl = self._getLastPageUrl()
if lastUrl:
self.__nextUrl = lastUrl
def _couldGrow(self):
return self.__nextUrl is not None
def _fetchNextPage(self):
headers, data = self.__requester.requestJsonAndCheck(
"GET",
self.__nextUrl,
parameters=self.__nextParams,
headers=self.__headers
)
data = data if data else []
self.__nextUrl = None
if len(data) > 0:
links = self.__parseLinkHeader(headers)
if self._reversed:
if "prev" in links:
self.__nextUrl = links["prev"]
elif "next" in links:
self.__nextUrl = links["next"]
self.__nextParams = None
if 'items' in data:
self.__totalCount = data['total_count']
data = data["items"]
content = [
self.__contentClass(self.__requester, headers, element, completed=False)
for element in data if element is not None
]
if self._reversed:
return content[::-1]
return content
def __parseLinkHeader(self, headers):
links = {}
if "link" in headers:
linkHeaders = headers["link"].split(", ")
for linkHeader in linkHeaders:
(url, rel) = linkHeader.split("; ")
url = url[1:-1]
rel = rel[5:-1]
links[rel] = url
return links
def get_page(self, page):
params = dict(self.__firstParams)
if page != 0:
params["page"] = page + 1
if self.__requester.per_page != 30:
params["per_page"] = self.__requester.per_page
headers, data = self.__requester.requestJsonAndCheck(
"GET",
self.__firstUrl,
parameters=params,
headers=self.__headers
)
if 'items' in data:
self.__totalCount = data['total_count']
data = data["items"]
return [
self.__contentClass(self.__requester, headers, element, completed=False)
for element in data
]
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