# The ChangesetController is the RESTful interface to Changeset objects class ChangesetController < ApplicationController require 'xml/libxml' before_filter :authorize, :only => [:create, :update, :delete, :upload] before_filter :check_write_availability, :only => [:create, :update, :delete, :upload] before_filter :check_read_availability, :except => [:create, :update, :delete, :upload] after_filter :compress_output # Create a changeset from XML. def create if request.put? cs = Changeset.from_xml(request.raw_post, true) if cs cs.user_id = @user.id cs.save_with_tags! render :text => cs.id.to_s, :content_type => "text/plain" else render :nothing => true, :status => :bad_request end else render :nothing => true, :status => :method_not_allowed end end def create_prim(ids, prim, nd) prim.version = 0 prim.user_id = @user.id prim.visible = true prim.save_with_history! ids[nd['id'].to_i] = prim.id end def fix_way(w, node_ids) w.nds = w.instance_eval { @nds }. map { |nd| node_ids[nd] || nd } return w end def fix_rel(r, ids) r.members = r.instance_eval { @members }. map { |memb| [memb[0], ids[memb[0]][memb[1].to_i] || memb[1], memb[2]] } return r end def read begin changeset = Changeset.find(params[:id]) render :text => changeset.to_xml.to_s, :content_type => "text/xml" rescue ActiveRecord::RecordNotFound render :nothing => true, :status => :not_found end end def close begin if not request.put? render :nothing => true, :status => :method_not_allowed return end changeset = Changeset.find(params[:id]) changeset.open = false changeset.save render :nothing => true rescue ActiveRecord::RecordNotFound render :nothing => true, :status => :not_found end end def upload if not request.put? render :nothing => true, :status => :method_not_allowed return end # FIXME: this should really be done without loading the whole XML file # into memory. p = XML::Parser.new p.string = request.raw_post doc = p.parse node_ids, way_ids, rel_ids = {}, {}, {} ids = {"node"=>node_ids, "way"=>way_ids, "relation"=>rel_ids} res = XML::Document.new res.encoding = 'UTF-8' root = XML::Node.new 'osm' root['version'] = '0.6' root['creator'] = 'OpenStreetMap.org' res.root = root root << XML::Node.new_comment(" Warning: this is a 0.6 result document, " + "not a normal OSM file. ") Changeset.transaction do doc.find('//osm/create/node').each do |nd| elem = XML::Node.new 'node' node = Node.from_xml_node(nd, true) elem['old_id'] = nd['id'] create_prim node_ids, node, nd elem['new_id'] = node.id.to_s elem['new_version'] = node.version.to_s root << elem end doc.find('//osm/create/way').each do |nd| elem = XML::Node.new 'way' way = Way.from_xml_node(nd, true) elem['old_id'] = nd['id'] fix_way(way, node_ids) raise OSM::APIPreconditionFailedError.new if !way.preconditions_ok? create_prim way_ids, way, nd elem['new_id'] = way.id.to_s elem['new_version'] = way.version.to_s root << elem end doc.find('//osm/create/relation').each do |nd| elem = XML::Node.new 'relation' relation = Relation.from_xml_node(nd, true) elem['old_id'] = nd['id'] fix_rel(relation, ids) raise OSM::APIPreconditionFailedError.new if !relation.preconditions_ok? create_prim rel_ids, relation, nd elem['new_id'] = relation.id.to_s elem['new_version'] = relation.version.to_s root << elem end doc.find('//osm/modify/relation').each do |nd| elem = XML::Node.new 'relation' new_relation = Relation.from_xml_node(nd) relation = Relation.find(new_relation.id) relation.update_from new_relation, @user elem['old_id'] = elem['new_id'] = relation.id.to_s elem['new_version'] = relation.version.to_s root << elem end doc.find('//osm/modify/way').each do |nd| elem = XML::Node.new 'way' new_way = Way.from_xml_node(nd) way = Way.find(new_way.id) way.update_from new_way, @user elem['old_id'] = elem['new_id'] = way.id.to_s elem['new_version'] = way.version.to_s root << elem end doc.find('//osm/modify/node').each do |nd| elem = XML::Node.new 'node' new_node = Node.from_xml_node(nd) node = Node.find(new_node.id) node.update_from new_node, @user elem['old_id'] = elem['new_id'] = node.id.to_s elem['new_version'] = node.version.to_s root << elem end doc.find('//osm/delete/relation').each do |nd| elem = XML::Node.new 'relation' relation = Relation.find(nd['id']) relation.delete_with_history(@user) elem['old_id'] = elem['new_id'] = relation.id.to_s elem['new_version'] = relation.version.to_s root << elem end doc.find('//osm/delete/way').each do |nd| elem = XML::Node.new 'way' way = Way.find(nd['id']) way.delete_with_history(@user) elem['old_id'] = elem['new_id'] = way.id.to_s elem['new_version'] = way.version.to_s root << elem end doc.find('//osm/delete/node').each do |nd| elem = XML::Node.new 'node' new_node = Node.from_xml_node(nd) node = Node.find(nd['id']) node.delete_with_history(@user) elem['old_id'] = elem['new_id'] = node.id.to_s elem['new_version'] = node.version.to_s root << elem end end render :text => res.to_s, :content_type => "text/xml" end end