1 class ApiController < ApplicationController
3 before_filter :authorize
4 after_filter :compress_output
10 @current_user = User.find_by_token(session[:token])
13 # The maximum area you're allowed to request, in square degrees
14 MAX_REQUEST_AREA = 0.25
18 response.headers["Content-Type"] = 'text/xml'
21 unless bbox and bbox.count(',') == 3
22 report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
26 bbox = bbox.split(',')
28 min_lon = bbox[0].to_f
29 min_lat = bbox[1].to_f
30 max_lon = bbox[2].to_f
31 max_lat = bbox[3].to_f
33 # check the bbox is sane
34 unless min_lon <= max_lon
35 report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
38 unless min_lat <= max_lat
39 report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
42 unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
43 report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
47 # check the bbox isn't too large
48 requested_area = (max_lat-min_lat)*(max_lon-min_lon)
49 if requested_area > MAX_REQUEST_AREA
50 report_error("The maximum bbox size is " + MAX_REQUEST_AREA.to_s + ", and your request was too large. Either request a smaller area, or use planet.osm")
55 nodes = Node.find(:all, :conditions => ['latitude > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, max_lon])
57 node_ids = nodes.collect {|node| node.id }
59 if node_ids.length > 50_000
60 report_error("You requested too many nodes (limit is 50,000). Either request a smaller area, or use planet.osm")
63 if node_ids.length == 0
64 render :text => '<osm></osm>'
70 if node_ids.length > 0
71 node_ids_sql = "(#{node_ids.join(',')})"
72 # get the referenced segments
73 segments = Segment.find_by_sql "select * from current_segments where visible = 1 and (node_a in #{node_ids_sql} or node_b in #{node_ids_sql})"
75 # see if we have any missing nodes
76 segments_nodes = segments.collect {|segment| segment.node_a }
77 segments_nodes += segments.collect {|segment| segment.node_b }
81 missing_nodes = segments_nodes - node_ids
83 # get missing nodes if there are any
84 nodes += Node.find(missing_nodes) if missing_nodes.length > 0
86 doc = OSM::API.new.get_xml_doc
89 # find which ways are needed
90 segment_ids = segments.collect {|segment| segment.id }
92 if segment_ids.length > 0
93 way_segments = WaySegment.find_all_by_segment_id(segment_ids)
94 way_ids = way_segments.collect {|way_segment| way_segment.id }
95 ways = Way.find(way_ids) # NB: doesn't pick up segments, tags from db until accessed via way.way_segments etc.
97 # seg_ids = way_segments.collect {|way_segment| way_segment.segment_id }
99 list_of_way_segs = ways.collect {|way| way.way_segments}
100 list_of_way_segs.flatten!
102 list_of_way_segments = list_of_way_segs.collect { |way_seg| way_seg.segment_id }
106 segments_to_fetch = list_of_way_segments.uniq - segment_ids
108 if segments_to_fetch.length > 0
109 segments += Segment.find(segments_to_fetch)
115 segments_nodes = segments.collect {|segment| segment.node_a }
116 segments_nodes += segments.collect {|segment| segment.node_b }
118 node_ids_a = nodes.collect {|node| node.id }
120 nodes_to_get = segments_nodes - node_ids_a
121 nodes += Node.find(nodes_to_get) if nodes_to_get.length > 0
124 user_display_name_cache = {}
128 doc.root << node.to_xml_node(user_display_name_cache)
129 visible_nodes[node.id] = node
133 visible_segments = {}
135 segments.each do |segment|
136 if visible_nodes[segment.node_a] and visible_nodes[segment.node_b] and segment.visible?
137 doc.root << segment.to_xml_node(user_display_name_cache)
138 visible_segments[segment.id] = segment
143 doc.root << way.to_xml_node(visible_segments, user_display_name_cache) if way.visible?
146 render :text => doc.to_s