X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/78b440ffc1e0448f8a6d73c8821dd58634ffb475..51195c450d16e35a62bff2bbf6c9dd0923bd0db4:/app/controllers/relation_controller.rb

diff --git a/app/controllers/relation_controller.rb b/app/controllers/relation_controller.rb
index f9d1586b8..390806f80 100644
--- a/app/controllers/relation_controller.rb
+++ b/app/controllers/relation_controller.rb
@@ -2,148 +2,129 @@ class RelationController < ApplicationController
   require 'xml/libxml'
 
   before_filter :authorize, :only => [:create, :update, :delete]
-  before_filter :check_availability, :only => [:create, :update, :delete]
-
+  before_filter :require_allow_write_api, :only => [:create, :update, :delete]
+  before_filter :require_public_data, :only => [:create, :update, :delete]
+  before_filter :check_api_writable, :only => [:create, :update, :delete]
+  before_filter :check_api_readable, :except => [:create, :update, :delete]
   after_filter :compress_output
+  around_filter :api_call_handle_error, :api_call_timeout
 
   def create
-    if request.put?
-      relation = Relation.from_xml(request.raw_post, true)
-
-      if relation
-        if !relation.preconditions_ok?
-          render :nothing => true, :status => :precondition_failed
-        else
-          relation.user_id = @user.id
-
-          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
-        end
-      else
-        render :nothing => true, :status => :bad_request
-      end
-    else
-      render :nothing => true, :status => :method_not_allowed
-    end
+    assert_method :put
+
+    relation = Relation.from_xml(request.raw_post, true)
+    
+    # We assume that an exception has been thrown if there was an error 
+    # generating the relation
+    #if relation
+    relation.create_with_history @user
+    render :text => relation.id.to_s, :content_type => "text/plain"
+    #else
+    # render :text => "Couldn't get turn the input into a relation.", :status => :bad_request
+    #end
   end
 
   def read
-    begin
-      relation = Relation.find(params[:id])
-
-      if relation.visible
-        render :text => relation.to_xml.to_s, :content_type => "text/xml"
-      else
-        render :nothing => true, :status => :gone
-      end
-    rescue ActiveRecord::RecordNotFound
-      render :nothing => true, :status => :not_found
-    rescue
-      render :nothing => true, :status => :internal_server_error
+    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 :text => "", :status => :gone
     end
   end
 
   def update
-    begin
-      relation = Relation.find(params[:id])
-
-      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
-        else
-          render :nothing => true, :status => :bad_request
-        end
-      else
-        render :nothing => true, :status => :gone
-      end
-    rescue ActiveRecord::RecordNotFound
-      render :nothing => true, :status => :not_found
-    rescue
-      render :nothing => true, :status => :internal_server_error
+    logger.debug request.raw_post
+
+    relation = Relation.find(params[:id])
+    new_relation = Relation.from_xml(request.raw_post)
+    
+    if new_relation and new_relation.id == relation.id
+      relation.update_from new_relation, @user
+      render :text => relation.version.to_s, :content_type => "text/plain"
+    else
+      render :nothing => true, :status => :bad_request
     end
   end
 
   def delete
-#XXX check if member somewhere!
-    begin
-      relation = Relation.find(params[:id])
-
-      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
-        else
-          relation.user_id = @user.id
-          relation.tags = []
-          relation.members = []
-          relation.visible = false
-
-          if relation.save_with_history
-            render :nothing => true
-          else
-            render :nothing => true, :status => :internal_server_error
-          end
-        end
-      else
-        render :nothing => true, :status => :gone
-      end
-    rescue ActiveRecord::RecordNotFound
-      render :nothing => true, :status => :not_found
-    rescue
-      render :nothing => true, :status => :internal_server_error
+    relation = Relation.find(params[:id])
+    new_relation = Relation.from_xml(request.raw_post)
+    if new_relation and new_relation.id == relation.id
+      relation.delete_with_history!(new_relation, @user)
+      render :text => relation.version.to_s, :content_type => "text/plain"
+    else
+      render :nothing => true, :status => :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
-    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
-        doc = OSM::API.new.get_xml_doc
-        nodes.each do |node|
-          doc.root << node.to_xml_node()
+    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' and m[1] != relation.id }.map { |m| m[1] }
+      
+      # next load the relations and the ways.
+      
+      relations = Relation.find(relation_ids, :include => [:relation_tags])
+      ways = Way.find(way_ids, :include => [: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 { |way|
+        way.way_nodes.collect { |way_node| way_node.node_id }
+      }
+      node_ids += way_node_ids.flatten
+      nodes = Node.find(node_ids.uniq, :include => :node_tags)
+      
+      # create XML.
+      doc = OSM::API.new.get_xml_doc
+      visible_nodes = {}
+      visible_members = { "Node" => {}, "Way" => {}, "Relation" => {} }
+      changeset_cache = {}
+      user_display_name_cache = {}
+      
+      nodes.each do |node|
+        if 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
+          visible_members["Node"][node.id] = true
         end
-        segments.each do |segment|
-          doc.root << segment.to_xml_node()
+      end
+      ways.each do |way|
+        if way.visible? # should be unnecessary if data is consistent.
+          doc.root << way.to_xml_node(visible_nodes, changeset_cache, user_display_name_cache)
+          visible_members["Way"][way.id] = true
         end
-        doc.root << relation.to_xml_node()
-
-        render :text => doc.to_s, :content_type => "text/xml"
-      else
-        render :nothing => true, :status => :gone
       end
-    rescue ActiveRecord::RecordNotFound
-      render :nothing => true, :status => :not_found
-    rescue
-      render :nothing => true, :status => :internal_server_error
+      relations.each do |rel|
+        if rel.visible? # should be unnecessary if data is consistent.
+          doc.root << rel.to_xml_node(nil, changeset_cache, user_display_name_cache)
+          visible_members["Relation"][rel.id] = true
+        end
+      end
+      # finally add self and output
+      doc.root << relation.to_xml_node(visible_members, changeset_cache, user_display_name_cache)
+      render :text => doc.to_s, :content_type => "text/xml"
+      
+    else
+      render :nothing => true, :status => :gone
     end
   end
 
@@ -159,23 +140,31 @@ class RelationController < ApplicationController
 
       render :text => doc.to_s, :content_type => "text/xml"
     else
-      render :nothing => true, :status => :bad_request
+      render :text => "You need to supply a comma separated list of ids.", :status => :bad_request
     end
   end
 
-  def relations_for_object(objtype)
-    relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', objtype, params[:id]]).collect { |ws| ws.id }.uniq
+  def relations_for_way
+    relations_for_object("Way")
+  end
 
-    if relationids.length > 0
-      doc = OSM::API.new.get_xml_doc
+  def relations_for_node
+    relations_for_object("Node")
+  end
 
-      Relation.find(relationids).each do |relation|
-        doc.root << relation.to_xml_node
-      end
+  def relations_for_relation
+    relations_for_object("Relation")
+  end
 
-      render :text => doc.to_s, :content_type => "text/xml"
-    else
-      render :nothing => true, :status => :bad_request
+  def relations_for_object(objtype)
+    relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', objtype, params[:id]]).collect { |ws| ws.id[0] }.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 :text => doc.to_s, :content_type => "text/xml"
   end
 end