# 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.

import itertools


def update_pagination(entities, request_size, page_size, marker,
                      sort_dir, sort_key, reversed_order):
    has_prev_data = False
    has_more_data = False

    entities = list(itertools.islice(entities, request_size))
    # first and middle page condition
    if len(entities) > page_size:
        entities.pop(-1)
        has_more_data = True
        # middle page condition
        if marker is not None:
            has_prev_data = True
    # first page condition when reached via prev back
    elif reversed_order and marker is not None:
        has_more_data = True
    # last page condition
    elif marker is not None:
        has_prev_data = True

    # restore the original ordering here
    if reversed_order:
        entities = sorted(entities, key=lambda entity:
                          (getattr(entity, sort_key)),
                          reverse=(sort_dir == sort_dir))

    return entities, has_more_data, has_prev_data

# 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.

import itertools


def update_pagination(entities, request_size, page_size, marker,
                      sort_dir, sort_key, reversed_order):
    has_prev_data = False
    has_more_data = False

    entities = list(itertools.islice(entities, request_size))
    # first and middle page condition
    if len(entities) > page_size:
        entities.pop(-1)
        has_more_data = True
        # middle page condition
        if marker is not None:
            has_prev_data = True
    # first page condition when reached via prev back
    elif reversed_order and marker is not None:
        has_more_data = True
    # last page condition
    elif marker is not None:
        has_prev_data = True

    # restore the original ordering here
    if reversed_order:
        entities.reverse()

    return entities, has_more_data, has_prev_data

Use entities.reverse() rather sorted(.., reverse=True)
Use entities.reverse() rather sorted(.., reverse=True)

Change-Id: I33ee5b078e3d27a45bd159be0f0b241c20792f92
