=begin
 __        ___     _ _       _____                ____ __  __
 \ \      / / |__ (_) |_ ___|  ___|   _ ___  ___ / ___|  \/  |
  \ \ /\ / /| '_ \| | __/ _ \ |_ | | | / __|/ _ \ |   | |\/| |
   \ V  V / | | | | | ||  __/  _|| |_| \__ \  __/ |___| |  | |
    \_/\_/  |_| |_|_|\__\___|_|   \__,_|___/\___|\____|_|  |_|
                                            Container Manager

Copyright (c) 2015 David Prandzioch <kontakt@davidprandzioch.de>

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
=end

module ConfigCheck

  # Runs the configuration check
  #
  # @raise [RuntimeError]
  def self.run
    if self.valid_container_type?($container_type) == false
      raise RuntimeError, 'container_type is invalid'
    end
  end

  # Checks if the submitted container type is registered and valid
  #
  # @param container_type [String] The container type to check
  #
  # @raise [ArgumentError] If the container type is not set
  #
  # @return [Boolean] Result of the validation
  def self.valid_container_type?(container_type)
    raise ArgumentError 'container_type not set' if container_type.nil?
    valid_types = ['lxc', 'vserver']

    valid_types.include?(container_type)
  end
end