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#!/usr/bin/env python
# -*- encoding: utf-8 -*-
#
# author: David Medina
class Paginate:
""" Paginate resource iterator
:param resource: URL resource
:param requester: Bound method to request. See `GithubCore.get`
:param kwargs: Args to request (params)
"""
def __init__(self, resource, requester, **kwargs):
self.resource = resource
self.requester = requester
self.kwargs = kwargs
self.page = 1
def _last_page(self, link):
""" Get and cached last page from link header """
if not getattr(self, 'last', False):
from github3.packages.link_header import parse_link_value
from urlparse import urlparse, parse_qs
for link, rels in parse_link_value(link).items():
if rels.get('rel') == 'last':
query = urlparse(link).query
self.last = int(parse_qs(query).get('page').pop())
return self.last
# TODO: reset iterators... multiple?
def __iter__(self):
return self
def initial(self):
""" First request. Force requester to paginate returning link header """
link, content = self.requester(self.resource, paginate=True,
page=1, **self.kwargs)
self.last = self._last_page(link) if link else 1
return content
def next(self):
if self.page == 1:
content = self.initial()
self.page += 1
return content
else:
if self.page > self.last:
raise StopIteration
else:
content = self.requester(self.resource, page=self.page,
**self.kwargs)
self.page += 1
return content
class Converter(object):
""" Abstract converter class """
def loads(self):
raise NotImplementedError("%s needs define '%s' method" %
(self.__class__.__name__, 'loads'))
def dumps(self):
raise NotImplementedError("%s needs define '%s' method" %
(self.__class__.__name__, 'dumps'))
def inject(self):
raise NotImplementedError("%s needs define '%s' method" %
(self.__class__.__name__, 'inject'))
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