X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/14b8e7619f284aa2e95ffdea605783384d202822..d29a319ab0c9d692eb8a24f2d243282386d41346:/app/controllers/api_controller.rb

diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb
index 15e4f1c40..a17e630c2 100644
--- a/app/controllers/api_controller.rb
+++ b/app/controllers/api_controller.rb
@@ -1,18 +1,12 @@
 class ApiController < ApplicationController
 
-  before_filter :authorize
+  session :off
+  before_filter :check_read_availability, :except => [:capabilities]
   after_filter :compress_output
 
-  helper :user
-  model :user
-
   #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
 
@@ -22,7 +16,6 @@ class ApiController < ApplicationController
   
   def trackpoints
     @@count+=1
-    response.headers["Content-Type"] = 'text/xml'
     #retrieve the page number
     page = params['page'].to_i
     unless page
@@ -71,13 +64,8 @@ class ApiController < ApplicationController
       return
     end
 
-    # 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 => ['gps_points.latitude > ? AND gps_points.longitude > ? AND gps_points.latitude < ? AND gps_points.longitude < ? AND ( public = 1 OR gpx_files.user_id = ? ) AND visible = 1', min_lat.to_i, min_lon.to_i, max_lat.to_i, max_lon.to_i, @user.id ], :select => "gps_points.*", :joins => "INNER JOIN gpx_files ON gpx_files.id = gpx_id", :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" )
+    points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" )
 
     doc = XML::Document.new
     doc.encoding = 'UTF-8'
@@ -100,19 +88,19 @@ class ApiController < ApplicationController
 
     #exit when we have too many requests
     if @@count > MAX_COUNT
-      render :text => doc.to_s
+      render :text => doc.to_s, :content_type => "text/xml"
       @@count = COUNT
       exit!
     end
 
-    render :text => doc.to_s
+    render :text => doc.to_s, :content_type => "text/xml"
 
   end
 
   def map
+    GC.start
     @@count+=1
 
-    response.headers["Content-Type"] = 'text/xml'
     # Figure out the bbox
     bbox = params['bbox']
     unless bbox and bbox.count(',') == 3
@@ -144,67 +132,173 @@ class ApiController < ApplicationController
     # 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")
+      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])
+    nodes = Node.find_by_area(min_lat, min_lon, max_lat, max_lon, :conditions => "visible = 1")
 
     node_ids = nodes.collect {|node| node.id }
 
-    # (in the future, we may wish to abort here if we found too many nodes)
-
-    # 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})"
+    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
-    # 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!
 
-    missing_nodes = segments_nodes - node_ids
+    if node_ids.length == 0
+      render :text => "<osm version='0.5'></osm>", :content_type => "text/xml"
+      return
+    end
 
-    # get missing nodes if there are any
-    nodes += Node.find(missing_nodes) if missing_nodes.length > 0
+    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 
 
-    render :text => doc.to_s
+    # 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 = Array.new
+    if visible_nodes.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='node' and em.member_id in (#{visible_nodes.keys.join(',')})")
+    end
+    if way_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='way' and em.member_id in (#{way_ids.join(',')})")
+    end
+    # 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!
     end
+  end
+
+  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
+      starttime = endtime - hours
+    end
+
+    if zoom >= 1 and zoom <= 16 and
+       endtime >= starttime and endtime - starttime <= 24.hours
+      mask = (1 << zoom) - 1
+
+      tiles = Node.count(:conditions => ["timestamp BETWEEN ? AND ?", starttime, endtime],
+                         :group => "maptile_for_point(latitude, longitude, #{zoom})")
+
+      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 :nothing => true, :status => :bad_request
+    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