- ##
- # insert a (set of) points into a changeset bounding box. this can only
- # increase the size of the bounding box. this is a hint that clients can
- # set either before uploading a large number of changes, or changes that
- # the client (but not the server) knows will affect areas further away.
- def expand_bbox
- # only allow POST requests, because although this method is
- # idempotent, there is no "document" to PUT really...
- assert_method :post
-
- cs = Changeset.find(params[:id])
- check_changeset_consistency(cs, current_user)
-
- # keep an array of lons and lats
- lon = []
- lat = []
-
- # the request is in pseudo-osm format... this is kind-of an
- # abuse, maybe should change to some other format?
- doc = XML::Parser.string(request.raw_post, :options => XML::Parser::Options::NOERROR).parse
- doc.find("//osm/node").each do |n|
- lon << n["lon"].to_f * GeoRecord::SCALE
- lat << n["lat"].to_f * GeoRecord::SCALE
- end
-
- # add the existing bounding box to the lon-lat array
- lon << cs.min_lon unless cs.min_lon.nil?
- lat << cs.min_lat unless cs.min_lat.nil?
- lon << cs.max_lon unless cs.max_lon.nil?
- lat << cs.max_lat unless cs.max_lat.nil?
-
- # collapse the arrays to minimum and maximum
- cs.min_lon = lon.min
- cs.min_lat = lat.min
- cs.max_lon = lon.max
- cs.max_lat = lat.max
-
- # save the larger bounding box and return the changeset, which
- # will include the bigger bounding box.
- cs.save!
- @changeset = cs
- render "changesets/changeset"
- end
-