X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/8c9544e60a6b4699a475623aed179bfb6bc96337..6d07f5661a4530b334ab752044536e8bdb201b02:/app/controllers/api_controller.rb?ds=sidebyside

diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb
index 9e3839697..44ae65285 100644
--- a/app/controllers/api_controller.rb
+++ b/app/controllers/api_controller.rb
@@ -1,44 +1,259 @@
 class ApiController < ApplicationController
 
-  def map
+  session :off
+  after_filter :compress_output
+
+  #COUNT is the number of map requests to allow before exiting and starting a new process
+  @@count = COUNT
+
+  # The maximum area you're allowed to request, in square degrees
+  MAX_REQUEST_AREA = 0.25
+
+
+  # Number of GPS trace/trackpoints returned per-page
+  TRACEPOINTS_PER_PAGE = 5000
+  
+  def trackpoints
+    @@count+=1
+    #retrieve the page number
+    page = params['page'].to_i
+    unless page
+        page = 0;
+    end
+
+    unless page >= 0
+        report_error("Page number must be greater than or equal to 0")
+        return
+    end
+
+    offset = page * TRACEPOINTS_PER_PAGE
+
+    # Figure out the bbox
     bbox = params['bbox']
     unless bbox and bbox.count(',') == 3
-      render :nothing => true, :status => 400
+      report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
       return
     end
 
     bbox = bbox.split(',')
 
-    min_lat = bbox[0].to_f
-    min_lon = bbox[1].to_f
-    max_lat = bbox[2].to_f
-    max_lon = bbox[3].to_f
+    min_lon = bbox[0].to_f
+    min_lat = bbox[1].to_f
+    max_lon = bbox[2].to_f
+    max_lat = bbox[3].to_f
 
-    nodes = Node.find(:all, :conditions => ['latitude > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, max_lon])
+    # check the bbox is sane
+    unless min_lon <= max_lon
+      report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
+      return
+    end
+    unless min_lat <= max_lat
+      report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
+      return
+    end
+    unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
+      report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
+      return
+    end
 
-    node_ids = "(#{nodes.collect {|node| node.id }})"
+    # check the bbox isn't too large
+    requested_area = (max_lat-min_lat)*(max_lon-min_lon)
+    if requested_area > MAX_REQUEST_AREA
+      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")
+      return
+    end
 
-    segments = Segment.find(:all, :condtions => ['node_a in ? or node_b in ?', node_ids, node_ids])
-    render :text => node_ids.join(',')
-    return
+    # integerise
+    min_lat = min_lat * 1000000
+    max_lat = max_lat * 1000000
+    min_lon = min_lon * 1000000
+    max_lon = max_lon * 1000000
+    # get all the points
+    points = Tracepoint.find(:all, :conditions => ['latitude BETWEEN ? AND ? AND longitude BETWEEN ? AND ?', min_lat.to_i, max_lat.to_i, min_lon.to_i, max_lon.to_i], :select => "DISTINCT *", :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" )
 
     doc = XML::Document.new
-    doc.encoding = 'UTF-8' 
-    root = XML::Node.new 'osm'
-    root['version'] = '0.4'
-    root['generator'] = 'OpenStreetMap server'
+    doc.encoding = 'UTF-8'
+    root = XML::Node.new 'gpx'
+    root['version'] = '1.0'
+    root['creator'] = 'OpenStreetMap.org'
+    root['xmlns'] = "http://www.topografix.com/GPX/1/0/"
+    
     doc.root = root
 
-    render :text => doc.to_s
+    track = XML::Node.new 'trk'
+    doc.root << track
+
+    trkseg = XML::Node.new 'trkseg'
+    track << trkseg
+
+    points.each do |point|
+      trkseg << point.to_xml_node()
+    end
+
+    #exit when we have too many requests
+    if @@count > MAX_COUNT
+      render :text => doc.to_s, :content_type => "text/xml"
+      @@count = COUNT
+      exit!
+    end
+
+    render :text => doc.to_s, :content_type => "text/xml"
+
+  end
+
+  def map
+    GC.start
+    @@count+=1
+
+    # Figure out the bbox
+    bbox = params['bbox']
+    unless bbox and bbox.count(',') == 3
+      report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
+      return
+    end
+
+    bbox = bbox.split(',')
+
+    min_lon = bbox[0].to_f
+    min_lat = bbox[1].to_f
+    max_lon = bbox[2].to_f
+    max_lat = bbox[3].to_f
+
+    # check the bbox is sane
+    unless min_lon <= max_lon
+      report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
+      return
+    end
+    unless min_lat <= max_lat
+      report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
+      return
+    end
+    unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
+      report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
+      return
+    end
+
+    # check the bbox isn't too large
+    requested_area = (max_lat-min_lat)*(max_lon-min_lon)
+    if requested_area > MAX_REQUEST_AREA
+      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")
+      return
+    end
+
+    # get all the nodes
+    nodes = Node.find(:all, :conditions => 
+        ['latitude > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, max_lon])
+
+    node_ids = nodes.collect {|node| node.id }
+
+    if node_ids.length > 50_000
+      report_error("You requested too many nodes (limit is 50,000). Either request a smaller area, or use planet.osm")
+      return
+    end
+
+    if node_ids.length == 0
+      render :text => "<osm version='0.5'></osm>", :content_type => "text/xml"
+      return
+    end
+
+    relations = Array.new
+
+    doc = OSM::API.new.get_xml_doc
+
+    # 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 }
+      ways = Way.find(way_ids)
+
+      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.find(nodes_to_fetch)
+    end
+
+    visible_nodes = {}
+    user_display_name_cache = {}
+
+    nodes.each do |node|
+      if node.visible?
+        doc.root << node.to_xml_node(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, user_display_name_cache)
+        way_ids << way.id
+      end
+    end 
+
+    # collect relationships. currently done in one big block at the end;
+    # may need to move this upwards if people want automatic completion of
+    # relationships, i.e. deliver referenced objects like we do with ways...
+    relations = Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+        "e.visible=1 and " +
+        "em.id = e.id and em.member_type='node' and em.member_id in (#{visible_nodes.keys.join(',')})")
+    relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+        "e.visible=1 and " +
+        "em.id = e.id and em.member_type='way' and em.member_id in (#{way_ids.join(',')})")
+    # 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)
+    relation_ids = relations.collect { |relation| relation.id }
+    if relation_ids.length > 0
+        relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+            "e.visible=1 and " +
+            "em.id = e.id and em.member_type='relation' and em.member_id in (#{relation_ids.join(',')})")
+    end
+
+    # 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(user_display_name_cache)
+    end
+
+    render :text => doc.to_s, :content_type => "text/xml"
     
-    #el1 = XML::Node.new 'node'
-    #el1['id'] = self.id.to_s
-    #el1['lat'] = self.latitude.to_s
-    #el1['lon'] = self.longitude.to_s
-    #Node.split_tags(el1, self.tags)
-    #el1['visible'] = self.visible.to_s
-    #el1['timestamp'] = self.timestamp.xmlschema
-    #root << el1
+    #exit when we have too many requests
+    if @@count > MAX_COUNT
+      @@count = COUNT
+      
+      exit!
+    end
   end
 
+  def capabilities
+    doc = OSM::API.new.get_xml_doc
+
+    api = XML::Node.new 'api'
+    version = XML::Node.new 'version'
+    version['minimum'] = '0.5';
+    version['maximum'] = '0.5';
+    api << version
+    area = XML::Node.new 'area'
+    area['maximum'] = MAX_REQUEST_AREA.to_s;
+    api << area
+    
+    doc.root << api
+
+    render :text => doc.to_s, :content_type => "text/xml"
+  end
 end