#
# Cookbook Name:: openstack-common
# library:: uri
#
# Copyright 2012, Jay Pipes
#
# 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.
#

require "uri"

module ::Openstack
  # Returns a uri::URI from a hash. If the hash has a "uri" key, the value
  # of that is returned. If not, then the routine attempts to construct
  # the URI from other parts of the hash, notably looking for keys of
  # "host", "port", "scheme", and "path" to construct the URI.
  #
  # Returns nil if neither "uri" or "host" keys exist in the supplied
  # hash.
  def uri_from_hash hash
    if hash['uri']
      ::URI.parse hash['uri']
    else
      return nil unless hash['host']

      scheme = hash['scheme'] ? hash['scheme'] : "http"
      host = hash['host']
      port = hash['port']  # Returns nil if missing, which is fine.
      path = hash['path']  # Returns nil if missing, which is fine.
      ::URI::Generic.new scheme, nil, host, port, nil, path, nil, nil, nil
    end
  end
end