X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/9186a6155c4a9bbfd60eddd50f3eb63db78fd07e..b38343e5bd95230c6bb2159700102dbca247fa03:/app/controllers/api/relations_controller.rb

diff --git a/app/controllers/api/relations_controller.rb b/app/controllers/api/relations_controller.rb
new file mode 100644
index 000000000..a0740b382
--- /dev/null
+++ b/app/controllers/api/relations_controller.rb
@@ -0,0 +1,169 @@
+module Api
+  class RelationsController < ApplicationController
+    require "xml/libxml"
+
+    skip_before_action :verify_authenticity_token
+    before_action :authorize, :only => [:create, :update, :delete]
+    before_action :api_deny_access_handler
+
+    authorize_resource
+
+    before_action :require_public_data, :only => [:create, :update, :delete]
+    before_action :check_api_writable, :only => [:create, :update, :delete]
+    before_action :check_api_readable, :except => [:create, :update, :delete]
+    around_action :api_call_handle_error, :api_call_timeout
+
+    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 show
+      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 index
+      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
+    end
+  end
+end