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# 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 urllib import parse as urlparse
def encode(value, encoding='utf-8'):
"""Return a byte repr of a string for a given encoding.
Byte strings and values of other types are returned as is.
"""
if isinstance(value, str):
return value.encode(encoding)
else:
return value
def url_with_filters(url, filters=None):
"""Add a percent-encoded string of filters (a dict) to a base url."""
if filters:
filters = [(encode(k), encode(v)) for k, v in filters.items()]
urlencoded_filters = urlparse.urlencode(filters)
url = urlparse.urljoin(url, '?' + urlencoded_filters)
return url
def get_required_query_param_from_args(required_traits, forbidden_traits):
# Iterate the required params and collect OR groups and simple
# AND traits separately. Each OR group needs a separate query param
# while the AND traits and forbidden traits can be collated to a single
# query param
required_query_params = []
and_traits = []
for required in required_traits:
if ',' in required:
required_query_params.append('in:' + required)
else:
and_traits.append(required)
# We need an extra required query param for the and_traits and the
# forbidden traits
and_query = ','.join(and_traits + forbidden_traits)
if and_query:
required_query_params.append(and_query)
return required_query_params
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