class RelationController < ApplicationController
require 'xml/libxml'
+ session :off
before_filter :authorize, :only => [:create, :update, :delete]
- before_filter :check_availability, :only => [:create, :update, :delete]
-
+ before_filter :check_write_availability, :only => [:create, :update, :delete]
+ before_filter :check_read_availability, :except => [:create, :update, :delete]
after_filter :compress_output
def create
if relation
if !relation.preconditions_ok?
- render :nothing => true, :status => :precondition_failed
+ render :text => "", :status => :precondition_failed
else
+ relation.version = 0
relation.user_id = @user.id
+ relation.save_with_history!
- if relation.save_with_history
- render :text => relation.id.to_s, :content_type => "text/plain"
- else
- print "save error\n";
- render :nothing => true, :status => :internal_server_error
- end
+ render :text => relation.id.to_s, :content_type => "text/plain"
end
else
render :nothing => true, :status => :bad_request
def read
begin
relation = Relation.find(params[:id])
-
+ response.headers['Last-Modified'] = relation.timestamp.rfc822
if relation.visible
render :text => relation.to_xml.to_s, :content_type => "text/xml"
else
- render :nothing => true, :status => :gone
+ render :text => "", :status => :gone
end
rescue ActiveRecord::RecordNotFound
render :nothing => true, :status => :not_found
def update
begin
relation = Relation.find(params[:id])
+ new_relation = Relation.from_xml(request.raw_post)
- if relation.visible
- new_relation = Relation.from_xml(request.raw_post)
-
- if new_relation and new_relation.id == relation.id
- if !new_relation.preconditions_ok?
- render :nothing => true, :status => :precondition_failed
- else
- relation.user_id = @user.id
- relation.tags = new_relation.tags
- relation.members = new_relation.members
- relation.visible = true
-
- if relation.save_with_history
- render :nothing => true
- else
- render :nothing => true, :status => :internal_server_error
- end
- end
+ if new_relation and new_relation.id == relation.id
+ if !new_relation.preconditions_ok?
+ render :text => "", :status => :precondition_failed
else
- render :nothing => true, :status => :bad_request
+ relation.user_id = @user.id
+ relation.tags = new_relation.tags
+ relation.members = new_relation.members
+ relation.visible = true
+ relation.save_with_history!
+
+ render :nothing => true
end
else
- render :nothing => true, :status => :gone
+ render :nothing => true, :status => :bad_request
end
rescue ActiveRecord::RecordNotFound
render :nothing => true, :status => :not_found
if relation.visible
if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = 1 AND member_type='relation' and member_id=?", params[:id]])
- render :nothing => true, :status => :precondition_failed
+ render :text => "", :status => :precondition_failed
else
relation.user_id = @user.id
relation.tags = []
relation.members = []
relation.visible = false
+ relation.save_with_history!
- if relation.save_with_history
- render :nothing => true
- else
- render :nothing => true, :status => :internal_server_error
- end
+ render :nothing => true
end
else
- render :nothing => true, :status => :gone
+ render :text => "", :status => :gone
end
rescue ActiveRecord::RecordNotFound
render :nothing => true, :status => :not_found
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
begin
relation = Relation.find(params[:id])
if relation.visible
- # In future, we might want to do all the data fetch in one step
- seg_ids = relation.segs + [-1]
- segments = Segment.find_by_sql "select * from current_segments where visible = 1 and id IN (#{seg_ids.join(',')})"
-
- node_ids = segments.collect {|segment| segment.node_a }
- node_ids += segments.collect {|segment| segment.node_b }
- node_ids += [-1]
- nodes = Node.find(:all, :conditions => "visible = 1 AND id IN (#{node_ids.join(',')})")
- # Render
+ # first collect nodes, ways, and relations referenced by this relation.
+
+ ways = Way.find_by_sql("select w.* from current_ways w,current_relation_members rm where "+
+ "rm.member_type='way' and rm.member_id=w.id and rm.id=#{relation.id}");
+ nodes = Node.find_by_sql("select n.* from current_nodes n,current_relation_members rm where "+
+ "rm.member_type='node' and rm.member_id=n.id and rm.id=#{relation.id}");
+ # note query is built to exclude self just in case.
+ relations = Relation.find_by_sql("select r.* from current_relations r,current_relation_members rm where "+
+ "rm.member_type='relation' and rm.member_id=r.id and rm.id=#{relation.id} and r.id<>rm.id");
+
+ # now additionally collect nodes referenced by ways. Note how we recursively
+ # evaluate ways but NOT relations.
+
+ node_ids = nodes.collect {|node| node.id }
+ way_node_ids = ways.collect { |way|
+ way.way_nodes.collect { |way_node| way_node.node_id }
+ }
+ way_node_ids.flatten!
+ way_node_ids.uniq
+ way_node_ids -= node_ids
+ nodes += Node.find(way_node_ids)
+
+ # create XML.
doc = OSM::API.new.get_xml_doc
+ visible_nodes = {}
+ user_display_name_cache = {}
+
nodes.each do |node|
- doc.root << node.to_xml_node()
+ if node.visible? # should be unnecessary if data is consistent.
+ doc.root << node.to_xml_node(user_display_name_cache)
+ visible_nodes[node.id] = node
+ end
end
- segments.each do |segment|
- doc.root << segment.to_xml_node()
+ ways.each do |way|
+ if way.visible? # should be unnecessary if data is consistent.
+ doc.root << way.to_xml_node(visible_nodes, user_display_name_cache)
+ end
end
- doc.root << relation.to_xml_node()
-
+ relations.each do |rel|
+ if rel.visible? # should be unnecessary if data is consistent.
+ doc.root << rel.to_xml_node(user_display_name_cache)
+ end
+ end
+ # finally add self and output
+ doc.root << relation.to_xml_node(user_display_name_cache)
render :text => doc.to_s, :content_type => "text/xml"
+
else
- render :nothing => true, :status => :gone
+
+ render :text => "", :status => :gone
end
+
rescue ActiveRecord::RecordNotFound
render :nothing => true, :status => :not_found
+
rescue
render :nothing => true, :status => :internal_server_error
end
end
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
+
def relations_for_object(objtype)
relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', objtype, params[:id]]).collect { |ws| ws.id }.uniq
- if relationids.length > 0
- doc = OSM::API.new.get_xml_doc
-
- Relation.find(relationids).each do |relation|
- doc.root << relation.to_xml_node
- end
+ doc = OSM::API.new.get_xml_doc
- render :text => doc.to_s, :content_type => "text/xml"
- else
- render :nothing => true, :status => :bad_request
+ Relation.find(relationids).each do |relation|
+ doc.root << relation.to_xml_node
end
+
+ render :text => doc.to_s, :content_type => "text/xml"
end
end
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