- render :text => doc.to_s, :content_type => "text/xml"
- end
-
- # Get a list of the tiles that have changed within a specified time
- # period
- def changes
- zoom = (params[:zoom] || "12").to_i
-
- if params.include?(:start) && params.include?(:end)
- starttime = Time.parse(params[:start])
- endtime = Time.parse(params[:end])
- else
- hours = (params[:hours] || "1").to_i.hours
- endtime = Time.now.getutc
- starttime = endtime - hours
- end
-
- if zoom >= 1 && zoom <= 16 &&
- endtime > starttime && endtime - starttime <= 24.hours
- mask = (1 << zoom) - 1
-
- tiles = Node.where(:timestamp => starttime..endtime).group("maptile_for_point(latitude, longitude, #{zoom})").count
-
- 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 :text => "Requested zoom is invalid, or the supplied start is after the end time, or the start duration is more than 24 hours", :status => :bad_request
- end
- end
-
- # External apps that use the api are able to query the api to find out some
- # parameters of the API. It currently returns:
- # * minimum and maximum API versions that can be used.
- # * maximum area that can be requested in a bbox request in square degrees
- # * number of tracepoints that are returned in each tracepoints page
- def capabilities
- doc = OSM::API.new.get_xml_doc
-
- api = XML::Node.new "api"
- version = XML::Node.new "version"
- version["minimum"] = API_VERSION.to_s
- version["maximum"] = API_VERSION.to_s
- api << version
- area = XML::Node.new "area"
- area["maximum"] = MAX_REQUEST_AREA.to_s
- api << area
- tracepoints = XML::Node.new "tracepoints"
- tracepoints["per_page"] = TRACEPOINTS_PER_PAGE.to_s
- api << tracepoints
- waynodes = XML::Node.new "waynodes"
- waynodes["maximum"] = MAX_NUMBER_OF_WAY_NODES.to_s
- api << waynodes
- changesets = XML::Node.new "changesets"
- changesets["maximum_elements"] = Changeset::MAX_ELEMENTS.to_s
- api << changesets
- timeout = XML::Node.new "timeout"
- timeout["seconds"] = API_TIMEOUT.to_s
- api << timeout
- status = XML::Node.new "status"
- status["database"] = database_status.to_s
- status["api"] = api_status.to_s
- status["gpx"] = gpx_status.to_s
- api << status
- doc.root << api
- policy = XML::Node.new "policy"
- blacklist = XML::Node.new "imagery"
- IMAGERY_BLACKLIST.each do |url_regex|
- xnd = XML::Node.new "blacklist"
- xnd["regex"] = url_regex.to_s
- blacklist << xnd
- end
- policy << blacklist
- doc.root << policy
-
- render :text => doc.to_s, :content_type => "text/xml"
- end
-
- # External apps that use the api are able to query which permissions
- # they have. This currently returns a list of permissions granted to the current user:
- # * if authenticated via OAuth, this list will contain all permissions granted by the user to the access_token.
- # * if authenticated via basic auth all permissions are granted, so the list will contain all permissions.
- # * unauthenticated users have no permissions, so the list will be empty.
- def permissions
- @permissions = case
- when current_token.present?
- ClientApplication.all_permissions.select { |p| current_token.read_attribute(p) }
- when @user
- ClientApplication.all_permissions
- else
- []
- end