200 lines
6.6 KiB
Ruby
200 lines
6.6 KiB
Ruby
class RelationController < ApplicationController
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require 'xml/libxml'
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session :off
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before_filter :authorize, :only => [:create, :update, :delete]
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before_filter :require_public_data, :only => [:create, :update, :delete]
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before_filter :check_api_writable, :only => [:create, :update, :delete]
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before_filter :check_api_readable, :except => [:create, :update, :delete]
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after_filter :compress_output
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def create
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begin
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if request.put?
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relation = Relation.from_xml(request.raw_post, true)
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# We assume that an exception has been thrown if there was an error
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# generating the relation
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#if relation
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relation.create_with_history @user
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render :text => relation.id.to_s, :content_type => "text/plain"
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#else
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# render :text => "Couldn't get turn the input into a relation.", :status => :bad_request
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#end
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else
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render :nothing => true, :status => :method_not_allowed
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end
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rescue OSM::APIError => ex
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render ex.render_opts
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end
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end
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def read
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begin
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relation = Relation.find(params[:id])
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response.headers['Last-Modified'] = relation.timestamp.rfc822
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if relation.visible
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render :text => relation.to_xml.to_s, :content_type => "text/xml"
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else
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render :text => "", :status => :gone
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end
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rescue ActiveRecord::RecordNotFound
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render :nothing => true, :status => :not_found
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rescue
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render :nothing => true, :status => :internal_server_error
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end
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end
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def update
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logger.debug request.raw_post
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begin
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relation = Relation.find(params[:id])
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new_relation = Relation.from_xml(request.raw_post)
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if new_relation and new_relation.id == relation.id
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relation.update_from new_relation, @user
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render :text => relation.version.to_s, :content_type => "text/plain"
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else
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render :nothing => true, :status => :bad_request
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end
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rescue ActiveRecord::RecordNotFound
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render :nothing => true, :status => :not_found
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rescue OSM::APIError => ex
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render ex.render_opts
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end
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end
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def delete
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begin
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relation = Relation.find(params[:id])
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new_relation = Relation.from_xml(request.raw_post)
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if new_relation and new_relation.id == relation.id
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relation.delete_with_history!(new_relation, @user)
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render :text => relation.version.to_s, :content_type => "text/plain"
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else
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render :nothing => true, :status => :bad_request
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end
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rescue OSM::APIError => ex
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render ex.render_opts
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rescue ActiveRecord::RecordNotFound
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render :nothing => true, :status => :not_found
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end
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end
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# -----------------------------------------------------------------
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# full
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#
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# input parameters: id
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#
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# returns XML representation of one relation object plus all its
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# members, plus all nodes part of member ways
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# -----------------------------------------------------------------
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def full
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begin
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relation = Relation.find(params[:id])
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if relation.visible
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# first find the ids of nodes, ways and relations referenced by this
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# relation - note that we exclude this relation just in case.
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node_ids = relation.members.select { |m| m[0] == 'Node' }.map { |m| m[1] }
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way_ids = relation.members.select { |m| m[0] == 'Way' }.map { |m| m[1] }
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relation_ids = relation.members.select { |m| m[0] == 'Relation' and m[1] != relation.id }.map { |m| m[1] }
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# next load the relations and the ways.
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relations = Relation.find(relation_ids, :include => [:relation_tags])
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ways = Way.find(way_ids, :include => [:way_nodes, :way_tags])
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# now additionally collect nodes referenced by ways. Note how we
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# recursively evaluate ways but NOT relations.
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way_node_ids = ways.collect { |way|
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way.way_nodes.collect { |way_node| way_node.node_id }
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}
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node_ids += way_node_ids.flatten
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nodes = Node.find(node_ids.uniq, :include => :node_tags)
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# create XML.
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doc = OSM::API.new.get_xml_doc
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visible_nodes = {}
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visible_members = { "Node" => [], "Way" => [], "Relation" => [] }
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changeset_cache = {}
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user_display_name_cache = {}
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nodes.each do |node|
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if node.visible? # should be unnecessary if data is consistent.
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doc.root << node.to_xml_node(changeset_cache, user_display_name_cache)
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visible_nodes[node.id] = node
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visible_members["Node"][node.id] = true
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end
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end
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ways.each do |way|
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if way.visible? # should be unnecessary if data is consistent.
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doc.root << way.to_xml_node(visible_nodes, changeset_cache, user_display_name_cache)
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visible_members["Way"][way.id] = true
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end
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end
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relations.each do |rel|
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if rel.visible? # should be unnecessary if data is consistent.
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doc.root << rel.to_xml_node(nil, changeset_cache, user_display_name_cache)
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visible_members["Relation"][rel.id] = true
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end
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end
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# finally add self and output
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doc.root << relation.to_xml_node(visible_members, changeset_cache, user_display_name_cache)
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render :text => doc.to_s, :content_type => "text/xml"
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else
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render :nothing => true, :status => :gone
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end
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rescue ActiveRecord::RecordNotFound
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render :nothing => true, :status => :not_found
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rescue
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render :nothing => true, :status => :internal_server_error
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end
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end
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def relations
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ids = params['relations'].split(',').collect { |w| w.to_i }
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if ids.length > 0
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doc = OSM::API.new.get_xml_doc
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Relation.find(ids).each do |relation|
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doc.root << relation.to_xml_node
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end
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render :text => doc.to_s, :content_type => "text/xml"
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else
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render :text => "You need to supply a comma separated list of ids.", :status => :bad_request
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end
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rescue ActiveRecord::RecordNotFound
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render :text => "Could not find one of the relations", :status => :not_found
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end
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def relations_for_way
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relations_for_object("Way")
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end
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def relations_for_node
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relations_for_object("Node")
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end
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def relations_for_relation
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relations_for_object("Relation")
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end
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def relations_for_object(objtype)
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relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', objtype, params[:id]]).collect { |ws| ws.id[0] }.uniq
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doc = OSM::API.new.get_xml_doc
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Relation.find(relationids).each do |relation|
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doc.root << relation.to_xml_node if relation.visible
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end
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render :text => doc.to_s, :content_type => "text/xml"
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end
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end
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