+ # initialise these variables outside of the loop so that they
+ # stay in scope and don't get free'd up by the GC during the
+ # loop.
+ gpx_id = -1
+ trackid = -1
+ track = nil
+ trkseg = nil
+ anon_track = nil
+ anon_trkseg = nil
+ gpx_file = nil
+ timestamps = false
+
+ points.each do |point|
+ if gpx_id != point.gpx_id
+ gpx_id = point.gpx_id
+ trackid = -1
+ gpx_file = Trace.find(gpx_id)
+
+ if gpx_file.trackable?
+ track = XML::Node.new 'trk'
+ doc.root << track
+ timestamps = true
+
+ if gpx_file.identifiable?
+ track << (XML::Node.new("name") << gpx_file.name)
+ track << (XML::Node.new("desc") << gpx_file.description)
+ track << (XML::Node.new("url") << url_for(:controller => 'trace', :action => 'view', :display_name => gpx_file.user.display_name, :id => gpx_file.id))
+ end
+ else
+ # use the anonymous track segment if the user hasn't allowed
+ # their GPX points to be tracked.
+ timestamps = false
+ if anon_track.nil?
+ anon_track = XML::Node.new 'trk'
+ doc.root << anon_track
+ end
+ track = anon_track
+ end
+ end
+
+ if trackid != point.trackid
+ if gpx_file.trackable?
+ trkseg = XML::Node.new 'trkseg'
+ track << trkseg
+ trackid = point.trackid
+ else
+ if anon_trkseg.nil?
+ anon_trkseg = XML::Node.new 'trkseg'
+ anon_track << anon_trkseg
+ end
+ trkseg = anon_trkseg
+ end
+ end
+
+ trkseg << point.to_xml_node(timestamps)
+ end
+
+ response.headers["Content-Disposition"] = "attachment; filename=\"tracks.gpx\""
+
+ render :text => doc.to_s, :content_type => "text/xml"
+ end
+
+ # This is probably the most common call of all. It is used for getting the
+ # OSM data for a specified bounding box, usually for editing. First the
+ # bounding box (bbox) is checked to make sure that it is sane. All nodes
+ # are searched, then all the ways that reference those nodes are found.
+ # All Nodes that are referenced by those ways are fetched and added to the list
+ # of nodes.
+ # Then all the relations that reference the already found nodes and ways are
+ # fetched. All the nodes and ways that are referenced by those ways are then
+ # fetched. Finally all the xml is returned.
+ def map
+ # Figure out the bbox
+ # check boundary is sane and area within defined
+ # see /config/application.yml
+ begin
+ bbox = BoundingBox.from_bbox_params(params)
+ bbox.check_boundaries
+ bbox.check_size
+ rescue Exception => err
+ report_error(err.message)
+ return
+ end
+
+ @nodes = Node.bbox(bbox).where(:visible => true).includes(:node_tags).limit(MAX_NUMBER_OF_NODES+1)
+ # get all the nodes, by tag not yet working, waiting for change from NickB
+ # need to be @nodes (instance var) so tests in /spec can be performed
+ #@nodes = Node.search(bbox, params[:tag])
+
+ node_ids = @nodes.collect(&:id)
+ if node_ids.length > MAX_NUMBER_OF_NODES
+ report_error("You requested too many nodes (limit is #{MAX_NUMBER_OF_NODES}). Either request a smaller area, or use planet.osm")
+ return
+ end
+ if node_ids.length == 0
+ render :text => "<osm version='#{API_VERSION}' generator='#{GENERATOR}'></osm>", :content_type => "text/xml"
+ return
+ end
+
+ doc = OSM::API.new.get_xml_doc
+
+ # add bounds
+ doc.root << bbox.add_bounds_to(XML::Node.new 'bounds')
+
+ # get ways
+ # find which ways are needed
+ ways = Array.new
+ if node_ids.length > 0
+ way_nodes = WayNode.find_all_by_node_id(node_ids)
+ way_ids = way_nodes.collect { |way_node| way_node.id[0] }
+ ways = Way.find(way_ids, :include => [:way_nodes, :way_tags])
+
+ list_of_way_nodes = ways.collect { |way|
+ way.way_nodes.collect { |way_node| way_node.node_id }
+ }
+ list_of_way_nodes.flatten!
+
+ else
+ list_of_way_nodes = Array.new
+ end
+
+ # - [0] in case some thing links to node 0 which doesn't exist. Shouldn't actually ever happen but it does. FIXME: file a ticket for this
+ nodes_to_fetch = (list_of_way_nodes.uniq - node_ids) - [0]
+
+ if nodes_to_fetch.length > 0
+ @nodes += Node.includes(:node_tags).find(nodes_to_fetch)
+ end
+
+ visible_nodes = {}
+ changeset_cache = {}
+ user_display_name_cache = {}
+
+ @nodes.each do |node|
+ if node.visible?
+ doc.root << node.to_xml_node(changeset_cache, user_display_name_cache)
+ visible_nodes[node.id] = node
+ end
+ end
+
+ way_ids = Array.new
+ ways.each do |way|
+ if way.visible?
+ doc.root << way.to_xml_node(visible_nodes, changeset_cache, user_display_name_cache)
+ way_ids << way.id
+ end
+ end
+
+ relations = Relation.nodes(visible_nodes.keys).visible +
+ Relation.ways(way_ids).visible
+
+ # we do not normally return the "other" partners referenced by an relation,
+ # e.g. if we return a way A that is referenced by relation X, and there's
+ # another way B also referenced, that is not returned. But we do make
+ # an exception for cases where an relation references another *relation*;
+ # in that case we return that as well (but we don't go recursive here)
+ relations += Relation.relations(relations.collect { |r| r.id }).visible
+
+ # this "uniq" may be slightly inefficient; it may be better to first collect and output
+ # all node-related relations, then find the *not yet covered* way-related ones etc.
+ relations.uniq.each do |relation|
+ doc.root << relation.to_xml_node(nil, changeset_cache, user_display_name_cache)
+ end
+
+ response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""
+
+ render :text => doc.to_s, :content_type => "text/xml"
+ end
+
+ # Get a list of the tiles that have changed within a specified time
+ # period
+ def changes
+ zoom = (params[:zoom] || '12').to_i
+
+ if params.include?(:start) and params.include?(:end)
+ starttime = Time.parse(params[:start])
+ endtime = Time.parse(params[:end])
+ else
+ hours = (params[:hours] || '1').to_i.hours
+ endtime = Time.now.getutc
+ starttime = endtime - hours
+ end
+
+ if zoom >= 1 and zoom <= 16 and
+ endtime > starttime and endtime - starttime <= 24.hours
+ mask = (1 << zoom) - 1
+
+ tiles = Node.where(:timestamp => starttime .. endtime).group("maptile_for_point(latitude, longitude, #{zoom})").count
+
+ doc = OSM::API.new.get_xml_doc
+ changes = XML::Node.new 'changes'
+ changes["starttime"] = starttime.xmlschema
+ changes["endtime"] = endtime.xmlschema
+
+ tiles.each do |tile, count|
+ x = (tile.to_i >> zoom) & mask
+ y = tile.to_i & mask
+
+ t = XML::Node.new 'tile'
+ t["x"] = x.to_s
+ t["y"] = y.to_s
+ t["z"] = zoom.to_s
+ t["changes"] = count.to_s
+
+ changes << t
+ end
+
+ doc.root << changes
+
+ render :text => doc.to_s, :content_type => "text/xml"
+ else
+ render :text => "Requested zoom is invalid, or the supplied start is after the end time, or the start duration is more than 24 hours", :status => :bad_request
+ end
projects / rails.git / blobdiff