+# this class pulls together the logic for all the old_* controllers
+# into one place. as it turns out, the API methods for historical
+# nodes, ways and relations are basically identical.
+class OldController < ApplicationController
+ require 'xml/libxml'
+
+ skip_before_filter :verify_authenticity_token
+ before_filter :setup_user_auth, :only => [ :history, :version ]
+ before_filter :authorize, :only => [ :redact ]
+ before_filter :authorize_moderator, :only => [ :redact ]
+ before_filter :require_allow_write_api, :only => [ :redact ]
+ before_filter :check_api_readable
+ before_filter :check_api_writable, :only => [ :redact ]
+ after_filter :compress_output
+ around_filter :api_call_handle_error, :api_call_timeout
+ before_filter :lookup_old_element, :except => [ :history ]
+ before_filter :lookup_old_elements_via_current, :only => [ :history ]
+
+ def history
+ doc = OSM::API.new.get_xml_doc
+
+ visible_elements = if show_redactions?
+ @elements
+ else
+ @elements.unredacted
+ end
+
+ visible_elements.each do |element|
+ doc.root << element.to_xml_node
+ end
+
+ render :text => doc.to_s, :content_type => "text/xml"
+ end
+
+ def version
+ if @old_element.redacted? and not show_redactions?
+ render :nothing => true, :status => :forbidden
+
+ else
+ response.last_modified = @old_element.timestamp
+
+ doc = OSM::API.new.get_xml_doc
+ doc.root << @old_element.to_xml_node
+
+ render :text => doc.to_s, :content_type => "text/xml"
+ end
+ end
+
+ def redact
+ redaction_id = params['redaction']
+ unless redaction_id.nil?
+ # if a redaction ID was specified, then set this element to
+ # be redacted in that redaction. (TODO: check that the
+ # user doing the redaction owns the redaction object too)
+ redaction = Redaction.find(redaction_id.to_i)
+ @old_element.redact!(redaction)
+
+ else
+ # if no redaction ID was provided, then this is an unredact
+ # operation.
+ @old_element.redact!(nil)
+ end
+
+ # just return an empty 200 OK for success
+ render :nothing => true
+ end
+
+ private
+
+ def show_redactions?
+ @user and @user.moderator? and params[:show_redactions] == "true"
+ end
+end