#
# Author:: Aaron Kalin (<akalin@martinisoftware.com>)
# License:: Apache License, Version 2.0
#
# 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.

Ohai.plugin(:Linode) do
  provides "linode"

  depends "kernel"
  depends "network/interfaces"

  # Checks for matching linode kernel name
  #
  # Returns true or false
  def has_linode_kernel?
    if kernel_data = kernel
      kernel_data[:release].split('-').last =~ /linode/
    end
  end

  # Identifies the linode cloud by preferring the hint, then
  #
  # Returns true or false
  def looks_like_linode?
    hint?('linode') || has_linode_kernel?
  end

  # Names linode ip address
  #
  # name - symbol of ohai name (e.g. :public_ip)
  # eth - Interface name (e.g. :eth0)
  #
  # Alters linode mash with new interface based on name parameter
  def get_ip_address(name, eth)
    if eth_iface = network[:interfaces][eth]
      eth_iface[:addresses].each do |key, info|
        linode[name] = key if info['family'] == 'inet'
      end
    end
  end

  collect_data do
    # Setup linode mash if it is a linode system
    if looks_like_linode?
      linode Mash.new
      get_ip_address(:public_ip, :eth0)
      get_ip_address(:private_ip, "eth0:1")
      hint?('linode').each{|k,v| linode[k] = v } if hint?('linode').kind_of?(Hash)
    end
  end
end
