def get_next_link(self):
if self.offset + self.limit >= self.count:
return None
url = self.request.build_absolute_uri()
url = replace_query_param(url, self.limit_query_param, self.limit)
offset = self.offset + self.limit
return replace_query_param(url, self.offset_query_param, offset)
def get_previous_link(self):
if self.offset <= 0:
return None
url = self.request.build_absolute_uri()
url = replace_query_param(url, self.limit_query_param, self.limit)
if self.offset - self.limit <= 0:
return remove_query_param(url, self.offset_query_param)
offset = self.offset - self.limit
return replace_query_param(url, self.offset_query_param, offset)
def add_query_param(request, key, val):
"""
Add a query parameter to the current request url, and return the new url.
"""
iri = request.get_full_path()
uri = iri_to_uri(iri)
return escape(replace_query_param(uri, key, val))
def get_previous_link(self):
if not self.page.has_previous():
return None
url = self.request.build_absolute_uri()
page_number = self.page.previous_page_number()
if page_number == 1:
return remove_query_param(url, self.page_query_param)
return replace_query_param(url, self.page_query_param, page_number)
def encode_cursor(self, cursor):
"""
Given a Cursor instance, return an url with encoded cursor.
"""
tokens = {}
if cursor.offset != 0:
tokens['o'] = str(cursor.offset)
if cursor.reverse:
tokens['r'] = '1'
if cursor.position is not None:
tokens['p'] = cursor.position
querystring = urlparse.urlencode(tokens, doseq=True)
encoded = b64encode(querystring.encode('ascii')).decode('ascii')
return replace_query_param(self.base_url, self.cursor_query_param, encoded)
def page_number_to_url(page_number):
if page_number == 1:
return remove_query_param(base_url, self.offset_query_param)
else:
offset = self.offset + ((page_number - current) * self.limit)
return replace_query_param(base_url, self.offset_query_param, offset)
def page_number_to_url(page_number):
if page_number == 1:
return remove_query_param(base_url, self.page_query_param)
else:
return replace_query_param(base_url, self.page_query_param, page_number)
def get_next_link(self):
if not self.page.has_next():
return None
url = self.request.build_absolute_uri()
page_number = self.page.next_page_number()
return replace_query_param(url, self.page_query_param, page_number)
