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# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from heat.openstack.common.py3kcompat import urlutils
def get_collection_links(request, items):
"""Retrieve 'next' link, if applicable."""
links = []
try:
limit = int(request.params.get("limit") or 0)
except ValueError:
limit = 0
if limit > 0 and limit == len(items):
last_item = items[-1]
last_item_id = last_item["id"]
links.append({
"rel": "next",
"href": _get_next_link(request, last_item_id)
})
return links
def _get_next_link(request, marker):
"""Return href string with proper limit and marker params."""
params = request.params.copy()
params['marker'] = marker
return "%s?%s" % (request.path_url, urlutils.urlencode(params))
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