class ApiController < ApplicationController
skip_before_action :verify_authenticity_token
- before_action :api_deny_access_handler
-
- authorize_resource :class => false
-
- before_action :check_api_readable
- around_action :api_call_handle_error, :api_call_timeout
-
- # This is probably the most common call of all. It is used for getting the
- # OSM data for a specified bounding box, usually for editing. First the
- # bounding box (bbox) is checked to make sure that it is sane. All nodes
- # are searched, then all the ways that reference those nodes are found.
- # All Nodes that are referenced by those ways are fetched and added to the list
- # of nodes.
- # Then all the relations that reference the already found nodes and ways are
- # fetched. All the nodes and ways that are referenced by those ways are then
- # fetched. Finally all the xml is returned.
- def map
- # Figure out the bbox
- # check boundary is sane and area within defined
- # see /config/application.yml
- begin
- bbox = BoundingBox.from_bbox_params(params)
- bbox.check_boundaries
- bbox.check_size
- rescue StandardError => err
- report_error(err.message)
- return
- end
-
- nodes = Node.bbox(bbox).where(:visible => true).includes(:node_tags).limit(MAX_NUMBER_OF_NODES + 1)
-
- node_ids = nodes.collect(&:id)
- if node_ids.length > MAX_NUMBER_OF_NODES
- report_error("You requested too many nodes (limit is #{MAX_NUMBER_OF_NODES}). Either request a smaller area, or use planet.osm")
- return
- end
-
- doc = OSM::API.new.get_xml_doc
-
- # add bounds
- doc.root << bbox.add_bounds_to(XML::Node.new("bounds"))
-
- # get ways
- # find which ways are needed
- ways = []
- if node_ids.empty?
- list_of_way_nodes = []
- else
- way_nodes = WayNode.where(:node_id => node_ids)
- way_ids = way_nodes.collect { |way_node| way_node.id[0] }
- ways = Way.preload(:way_nodes, :way_tags).find(way_ids)
-
- list_of_way_nodes = ways.collect do |way|
- way.way_nodes.collect(&:node_id)
- end
- list_of_way_nodes.flatten!
- 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]
-
- nodes += Node.includes(:node_tags).find(nodes_to_fetch) unless nodes_to_fetch.empty?
-
- visible_nodes = {}
- changeset_cache = {}
- user_display_name_cache = {}
-
- nodes.each do |node|
- if node.visible?
- doc.root << node.to_xml_node(changeset_cache, user_display_name_cache)
- visible_nodes[node.id] = node
- end
- end
-
- way_ids = []
- ways.each do |way|
- if way.visible?
- doc.root << way.to_xml_node(visible_nodes, changeset_cache, user_display_name_cache)
- way_ids << way.id
- end
- end
-
- relations = Relation.nodes(visible_nodes.keys).visible +
- Relation.ways(way_ids).visible
-
- # 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)
- relations += Relation.relations(relations.collect(&:id)).visible
-
- # 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(changeset_cache, user_display_name_cache)
- end
-
- response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""
-
- render :xml => doc.to_s
- end
end