#
# Author:: Serdar Sutay (<serdar@chef.io>)
# Copyright:: Copyright 2013-2016, Chef Software Inc.
# 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.
#

class Chef
  module Deprecation
    module Provider

      # == Deprecation::Provider::RemoteFile
      # This module contains the deprecated functions of
      # Chef::Provider::RemoteFile. These functions are refactored to different
      # components. They are frozen and will be removed in Chef 13.
      #
      module RemoteFile

        def current_resource_matches_target_checksum?
          @new_resource.checksum && @current_resource.checksum && @current_resource.checksum =~ /^#{Regexp.escape(@new_resource.checksum)}/
        end

        def matches_current_checksum?(candidate_file)
          Chef::Log.debug "#{@new_resource} checking for file existence of #{@new_resource.path}"
          if ::File.exists?(@new_resource.path)
            Chef::Log.debug "#{@new_resource} file exists at #{@new_resource.path}"
            @new_resource.checksum(checksum(candidate_file.path))
            Chef::Log.debug "#{@new_resource} target checksum: #{@current_resource.checksum}"
            Chef::Log.debug "#{@new_resource} source checksum: #{@new_resource.checksum}"

            @new_resource.checksum == @current_resource.checksum
          else
            Chef::Log.debug "#{@new_resource} creating #{@new_resource.path}"
            false
          end
        end

        def backup_new_resource
          if ::File.exists?(@new_resource.path)
            Chef::Log.debug "#{@new_resource} checksum changed from #{@current_resource.checksum} to #{@new_resource.checksum}"
            backup @new_resource.path
          end
        end

        def source_file(source, current_checksum, &block)
          if absolute_uri?(source)
            fetch_from_uri(source, &block)
          elsif !Chef::Config[:solo_legacy_mode]
            fetch_from_chef_server(source, current_checksum, &block)
          else
            fetch_from_local_cookbook(source, &block)
          end
        end

        def http_client_opts(source)
          opts = {}
          # CHEF-3140
          # 1. If it's already compressed, trying to compress it more will
          # probably be counter-productive.
          # 2. Some servers are misconfigured so that you GET $URL/file.tgz but
          # they respond with content type of tar and content encoding of gzip,
          # which tricks Chef::REST into decompressing the response body. In this
          # case you'd end up with a tar archive (no gzip) named, e.g., foo.tgz,
          # which is not what you wanted.
          if @new_resource.path =~ /gz$/ || source =~ /gz$/
            opts[:disable_gzip] = true
          end
          opts
        end

      end
    end
  end
end
