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
17 response.headers["Content-Type"] = 'text/xml'
20 unless bbox and bbox.count(',') == 3
21 report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
25 bbox = bbox.split(',')
27 min_lon = bbox[0].to_f
28 min_lat = bbox[1].to_f
29 max_lon = bbox[2].to_f
30 max_lat = bbox[3].to_f
32 # check the bbox is sane
33 unless min_lon <= max_lon
34 report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
37 unless min_lat <= max_lat
38 report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
41 unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
42 report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
46 # check the bbox isn't too large
47 requested_area = (max_lat-min_lat)*(max_lon-min_lon)
48 if requested_area > MAX_REQUEST_AREA
49 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")
54 nodes = Node.find(:all, :conditions => ['latitude > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, max_lon])
56 node_ids = nodes.collect {|node| node.id }
58 if node_ids.length > 50_000
59 report_error("You requested too many nodes (limit is 50,000). Either request a smaller area, or use planet.osm")
64 if node_ids.length > 0
65 node_ids_sql = "(#{node_ids.join(',')})"
66 # get the referenced segments
67 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})"
69 # see if we have any missing nodes
70 segments_nodes = segments.collect {|segment| segment.node_a }
71 segments_nodes += segments.collect {|segment| segment.node_b }
75 missing_nodes = segments_nodes - node_ids
77 # get missing nodes if there are any
78 nodes += Node.find(missing_nodes) if missing_nodes.length > 0
80 doc = OSM::API.new.get_xml_doc
83 # find which ways are needed
84 segment_ids = segments.collect {|segment| segment.id }
86 if segment_ids.length > 0
87 way_segments = WaySegment.find_all_by_segment_id(segment_ids)
88 way_ids = way_segments.collect {|way_segment| way_segment.id }
89 ways = Way.find(way_ids) # NB: doesn't pick up segments, tags from db until accessed via way.way_segments etc.
91 # seg_ids = way_segments.collect {|way_segment| way_segment.segment_id }
93 list_of_way_segs = ways.collect {|way| way.way_segments}
94 list_of_way_segs.flatten!
96 list_of_way_segments = list_of_way_segs.collect { |way_seg| way_seg.segment_id }
100 segments_to_fetch = list_of_way_segments.uniq - segment_ids
102 if segments_to_fetch.length > 0
103 segments += Segment.find(segments_to_fetch)
109 segments_nodes = segments.collect {|segment| segment.node_a }
110 segments_nodes += segments.collect {|segment| segment.node_b }
112 node_ids_a = nodes.collect {|node| node.id }
114 nodes_to_get = segments_nodes - node_ids_a
115 nodes += Node.find(nodes_to_get) if nodes_to_get.length > 0
118 user_display_name_cache = {}
122 doc.root << node.to_xml_node(user_display_name_cache)
123 visible_nodes[node.id] = node
127 visible_segments = {}
129 segments.each do |segment|
130 if visible_nodes[segment.node_a] and visible_nodes[segment.node_b] and segment.visible?
131 doc.root << segment.to_xml_node(user_display_name_cache)
132 visible_segments[segment.id] = segment
137 doc.root << way.to_xml_node(visible_segments, user_display_name_cache) if way.visible?
140 render :text => doc.to_s