- def create
- assert_method :put
-
- relation = Relation.from_xml(request.raw_post, true)
-
- # Assume that Relation.from_xml has thrown an exception if there is an error parsing the xml
- relation.create_with_history current_user
- render :plain => relation.id.to_s
- end
-
- def read
- relation = Relation.find(params[:id])
- response.last_modified = relation.timestamp
- if relation.visible
- render :xml => relation.to_xml.to_s
- else
- head :gone
- end
- end
-
- def update
- logger.debug request.raw_post
-
- relation = Relation.find(params[:id])
- new_relation = Relation.from_xml(request.raw_post)
-
- raise OSM::APIBadUserInput, "The id in the url (#{relation.id}) is not the same as provided in the xml (#{new_relation.id})" unless new_relation && new_relation.id == relation.id
-
- relation.update_from new_relation, current_user
- render :plain => relation.version.to_s
- end
-
- def delete
- relation = Relation.find(params[:id])
- new_relation = Relation.from_xml(request.raw_post)
- if new_relation && new_relation.id == relation.id
- relation.delete_with_history!(new_relation, current_user)
- render :plain => relation.version.to_s
- else
- head :bad_request
- end
- end
-
- # -----------------------------------------------------------------
- # full
- #
- # input parameters: id
- #
- # returns XML representation of one relation object plus all its
- # members, plus all nodes part of member ways
- # -----------------------------------------------------------------
- def full
- relation = Relation.find(params[:id])
-
- if relation.visible
-
- # first find the ids of nodes, ways and relations referenced by this
- # relation - note that we exclude this relation just in case.
-
- node_ids = relation.members.select { |m| m[0] == "Node" }.map { |m| m[1] }
- way_ids = relation.members.select { |m| m[0] == "Way" }.map { |m| m[1] }
- relation_ids = relation.members.select { |m| m[0] == "Relation" && m[1] != relation.id }.map { |m| m[1] }
-
- # next load the relations and the ways.
-
- relations = Relation.where(:id => relation_ids).includes(:relation_tags)
- ways = Way.where(:id => way_ids).includes(:way_nodes, :way_tags)
-
- # now additionally collect nodes referenced by ways. Note how we
- # recursively evaluate ways but NOT relations.
-
- way_node_ids = ways.collect do |way|
- way.way_nodes.collect(&:node_id)
- end
- node_ids += way_node_ids.flatten
- nodes = Node.where(:id => node_ids.uniq).includes(:node_tags)
-
- # create XML.
- doc = OSM::API.new.get_xml_doc
- visible_nodes = {}
- changeset_cache = {}
- user_display_name_cache = {}
-
- nodes.each do |node|
- next unless node.visible? # should be unnecessary if data is consistent.
-
- doc.root << node.to_xml_node(changeset_cache, user_display_name_cache)
- visible_nodes[node.id] = node
- end
-
- ways.each do |way|
- next unless way.visible? # should be unnecessary if data is consistent.
-
- doc.root << way.to_xml_node(visible_nodes, changeset_cache, user_display_name_cache)
- end
-
- relations.each do |rel|
- next unless rel.visible? # should be unnecessary if data is consistent.
-
- doc.root << rel.to_xml_node(changeset_cache, user_display_name_cache)
- end
-
- # finally add self and output
- doc.root << relation.to_xml_node(changeset_cache, user_display_name_cache)
- render :xml => doc.to_s
-
- else
- head :gone
- end
- end
-
- def relations
- raise OSM::APIBadUserInput, "The parameter relations is required, and must be of the form relations=id[,id[,id...]]" unless params["relations"]
-
- ids = params["relations"].split(",").collect(&:to_i)
-
- raise OSM::APIBadUserInput, "No relations were given to search for" if ids.empty?
-
- doc = OSM::API.new.get_xml_doc
-
- Relation.find(ids).each do |relation|
- doc.root << relation.to_xml_node
- end
-
- render :xml => doc.to_s
- end
-
- def relations_for_way
- relations_for_object("Way")
- end
-
- def relations_for_node
- relations_for_object("Node")
- end
-
- def relations_for_relation
- relations_for_object("Relation")
- end
-
- private
-
- def relations_for_object(objtype)
- relationids = RelationMember.where(:member_type => objtype, :member_id => params[:id]).collect(&:relation_id).uniq
-
- doc = OSM::API.new.get_xml_doc
-
- Relation.find(relationids).each do |relation|
- doc.root << relation.to_xml_node if relation.visible
- end
-
- render :xml => doc.to_s