Create api changeset download resource

[rails.git] / app / controllers / api / changesets_controller.rb

diff --git a/app/controllers/api/changesets_controller.rb b/app/controllers/api/changesets_controller.rb
index 3df7b75cea752aeb11a0681b728377d6f6a0d0e0..517cff47326d28853cacd96416c718c8b5d81b69 100644 (file)
--- a/app/controllers/api/changesets_controller.rb
+++ b/app/controllers/api/changesets_controller.rb
@@ -130,58 +130,6 @@ module Api
       end
     end
 
-    ##
-    # download the changeset as an osmChange document.
-    #
-    # to make it easier to revert diffs it would be better if the osmChange
-    # format were reversible, i.e: contained both old and new versions of
-    # modified elements. but it doesn't at the moment...
-    #
-    # this method cannot order the database changes fully (i.e: timestamp and
-    # version number may be too coarse) so the resulting diff may not apply
-    # to a different database. however since changesets are not atomic this
-    # behaviour cannot be guaranteed anyway and is the result of a design
-    # choice.
-    def download
-      changeset = Changeset.find(params[:id])
-
-      # get all the elements in the changeset which haven't been redacted
-      # and stick them in a big array.
-      elements = [changeset.old_nodes.unredacted,
-                  changeset.old_ways.unredacted,
-                  changeset.old_relations.unredacted].flatten
-
-      # sort the elements by timestamp and version number, as this is the
-      # almost sensible ordering available. this would be much nicer if
-      # global (SVN-style) versioning were used - then that would be
-      # unambiguous.
-      elements.sort_by! { |e| [e.timestamp, e.version] }
-
-      # generate an output element for each operation. note: we avoid looking
-      # at the history because it is simpler - but it would be more correct to
-      # check these assertions.
-      @created = []
-      @modified = []
-      @deleted = []
-
-      elements.each do |elt|
-        if elt.version == 1
-          # first version, so it must be newly-created.
-          @created << elt
-        elsif elt.visible
-          # must be a modify
-          @modified << elt
-        else
-          # if the element isn't visible then it must have been deleted
-          @deleted << elt
-        end
-      end
-
-      respond_to do |format|
-        format.xml
-      end
-    end
-
     ##
     # updates a changeset's tags. none of the changeset's attributes are
     # user-modifiable, so they will be ignored.