X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/c5d1f3381dfa81b4aac2d24dd057143bafbf661c..6d07f5661a4530b334ab752044536e8bdb201b02:/app/controllers/api_controller.rb?ds=sidebyside

diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb
index 8261e56aa..44ae65285 100644
--- a/app/controllers/api_controller.rb
+++ b/app/controllers/api_controller.rb
@@ -1,24 +1,33 @@
 class ApiController < ApplicationController
 
-  before_filter :authorize
+  session :off
   after_filter :compress_output
 
-  helper :user
-  model :user
-
-  #COUNT is the number of map requests to allow before exiting and stating a new process
+  #COUNT is the number of map requests to allow before exiting and starting a new process
   @@count = COUNT
 
-  def authorize_web
-    @current_user = User.find_by_token(session[:token])
-  end
-
   # The maximum area you're allowed to request, in square degrees
   MAX_REQUEST_AREA = 0.25
 
-  def map
+
+  # Number of GPS trace/trackpoints returned per-page
+  TRACEPOINTS_PER_PAGE = 5000
+  
+  def trackpoints
     @@count+=1
-    response.headers["Content-Type"] = 'text/xml'
+    #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
@@ -54,63 +63,197 @@ class ApiController < ApplicationController
       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])
+    # 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" )
 
-    node_ids = nodes.collect {|node| node.id }
+    doc = XML::Document.new
+    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
 
-    # (in the future, we may wish to abort here if we found too many nodes)
+    track = XML::Node.new 'trk'
+    doc.root << track
 
-    # grab the segments
-    segments = Array.new
-    if node_ids.length > 0
-      node_ids_sql = "(#{node_ids.join(',')})"
-      # get the referenced segments
-      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})"
+    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
-    # see if we have any missing nodes
-    segments_nodes = segments.collect {|segment| segment.node_a }
-    segments_nodes += segments.collect {|segment| segment.node_b }
 
-    segments_nodes.uniq!
+    render :text => doc.to_s, :content_type => "text/xml"
+
+  end
+
+  def map
+    GC.start
+    @@count+=1
 
-    missing_nodes = segments_nodes - node_ids
+    # 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
 
-    # get missing nodes if there are any
-    nodes += Node.find(missing_nodes) if missing_nodes.length > 0
+    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
-    segment_ids = segments.collect {|segment| segment.id }
     ways = Array.new
-    if segment_ids.length > 0
-      way_segments = WaySegment.find_all_by_segment_id(segment_ids)
-      way_ids = way_segments.collect {|way_segment| way_segment.id }
-      ways = Way.find(way_ids) # NB: doesn't pick up segments, tags from db until accessed via way.way_segments etc.
+    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
 
-    nodes.each do |node|
-      doc.root << node.to_xml_node()
+    # - [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
 
-    segments.each do |segment|
-      doc.root << segment.to_xml_node()
-    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|
-      doc.root << way.to_xml_node()
+      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"
+    
     #exit when we have too many requests
     if @@count > MAX_COUNT
-      render :text => doc.to_s
       @@count = COUNT
-      exit 
+      
+      exit!
     end
+  end
+
+  def capabilities
+    doc = OSM::API.new.get_xml_doc
 
-    render :text => doc.to_s
+    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