Add a changeset cache to stop us looking up the same changeset over

[rails.git] / app / models / way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index 92b69ed7dc15c472c6779c5d5673736cdc65c89d..52d28020969f4e1d1ed51a70e21144ad2cf54eac 100644 (file)
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -27,14 +27,13 @@ class Way < ActiveRecord::Base
 
   def self.from_xml(xml, create=false)
     begin
 
   def self.from_xml(xml, create=false)
     begin

-      p = XML::Parser.new
-      p.string = xml
+      p = XML::Parser.string(xml)

       doc = p.parse
 
       doc.find('//osm/way').each do |pt|
         return Way.from_xml_node(pt, create)
       end
       doc = p.parse
 
       doc.find('//osm/way').each do |pt|
         return Way.from_xml_node(pt, create)
       end

-    rescue LibXML::XML::Error => ex
+    rescue LibXML::XML::Error, ArgumentError => ex

       raise OSM::APIBadXMLError.new("way", xml, ex.message)
     end
   end
       raise OSM::APIBadXMLError.new("way", xml, ex.message)
     end
   end


@@ -52,7 +51,7 @@ class Way < ActiveRecord::Base
 
     # This next section isn't required for the create, update, or delete of ways
     if create
 
     # This next section isn't required for the create, update, or delete of ways
     if create

-      way.timestamp = Time.now
+      way.timestamp = Time.now.getutc

       way.visible = true
     else
       if pt['timestamp']
       way.visible = true
     else
       if pt['timestamp']


@@ -90,7 +89,7 @@ class Way < ActiveRecord::Base
     return doc
   end
 
     return doc
   end
 

-  def to_xml_node(visible_nodes = nil, user_display_name_cache = nil)
+  def to_xml_node(visible_nodes = nil, changeset_cache = {}, user_display_name_cache = {})

     el1 = XML::Node.new 'way'
     el1['id'] = self.id.to_s
     el1['visible'] = self.visible.to_s
     el1 = XML::Node.new 'way'
     el1['id'] = self.id.to_s
     el1['visible'] = self.visible.to_s


@@ -98,19 +97,25 @@ class Way < ActiveRecord::Base
     el1['version'] = self.version.to_s
     el1['changeset'] = self.changeset_id.to_s
 
     el1['version'] = self.version.to_s
     el1['changeset'] = self.changeset_id.to_s
 

-    user_display_name_cache = {} if user_display_name_cache.nil?
+    if changeset_cache.key?(self.changeset_id)
+      # use the cache if available
+    else
+      changeset_cache[self.changeset_id] = self.changeset.user_id
+    end

 
 

-    if user_display_name_cache and user_display_name_cache.key?(self.changeset.user_id)
+    user_id = changeset_cache[self.changeset_id]
+
+    if user_display_name_cache.key?(user_id)

       # use the cache if available
     elsif self.changeset.user.data_public?
       # use the cache if available
     elsif self.changeset.user.data_public?

-      user_display_name_cache[self.changeset.user_id] = self.changeset.user.display_name
+      user_display_name_cache[user_id] = self.changeset.user.display_name

     else
     else

-      user_display_name_cache[self.changeset.user_id] = nil
+      user_display_name_cache[user_id] = nil

     end
 
     end
 

-    if not user_display_name_cache[self.changeset.user_id].nil?
-      el1['user'] = user_display_name_cache[self.changeset.user_id]
-      el1['uid'] = self.changeset.user_id.to_s
+    if not user_display_name_cache[user_id].nil?
+      el1['user'] = user_display_name_cache[user_id]
+      el1['uid'] = user_id.to_s

     end
 
     # make sure nodes are output in sequence_id order
     end
 
     # make sure nodes are output in sequence_id order


@@ -200,10 +205,12 @@ class Way < ActiveRecord::Base
 
   def update_from(new_way, user)
     check_consistency(self, new_way, user)
 
   def update_from(new_way, user)
     check_consistency(self, new_way, user)

-    if !new_way.preconditions_ok?
-      raise OSM::APIPreconditionFailedError.new
+    unless new_way.preconditions_ok?
+      raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.")

     end
     end

+

     self.changeset_id = new_way.changeset_id
     self.changeset_id = new_way.changeset_id

+    self.changeset = new_way.changeset

     self.tags = new_way.tags
     self.nds = new_way.nds
     self.visible = true
     self.tags = new_way.tags
     self.nds = new_way.nds
     self.visible = true


@@ -212,8 +219,8 @@ class Way < ActiveRecord::Base
 
   def create_with_history(user)
     check_create_consistency(self, user)
 
   def create_with_history(user)
     check_create_consistency(self, user)

-    if !self.preconditions_ok?
-      raise OSM::APIPreconditionFailedError.new
+    unless self.preconditions_ok?
+      raise OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")

     end
     self.version = 0
     self.visible = true
     end
     self.version = 0
     self.visible = true


@@ -223,12 +230,12 @@ class Way < ActiveRecord::Base
   def preconditions_ok?
     return false if self.nds.empty?
     if self.nds.length > APP_CONFIG['max_number_of_way_nodes']
   def preconditions_ok?
     return false if self.nds.empty?
     if self.nds.length > APP_CONFIG['max_number_of_way_nodes']

-      raise OSM::APITooManyWayNodesError.new(self.nds.count, APP_CONFIG['max_number_of_way_nodes'])
+      raise OSM::APITooManyWayNodesError.new(self.nds.length, APP_CONFIG['max_number_of_way_nodes'])

     end
     self.nds.each do |n|
       node = Node.find(:first, :conditions => ["id = ?", n])
       unless node and node.visible
     end
     self.nds.each do |n|
       node = Node.find(:first, :conditions => ["id = ?", n])
       unless node and node.visible

-        return false
+        raise OSM::APIPreconditionFailedError.new("The node with id #{n} either does not exist, or is not visible")

       end
     end
     return true
       end
     end
     return true


@@ -236,7 +243,7 @@ class Way < ActiveRecord::Base
 
   def delete_with_history!(new_way, user)
     unless self.visible
 
   def delete_with_history!(new_way, user)
     unless self.visible

-      raise OSM::APIAlreadyDeletedError
+      raise OSM::APIAlreadyDeletedError.new("way", new_way.id)

     end
     
     # need to start the transaction here, so that the database can 
     end
     
     # need to start the transaction here, so that the database can 


@@ -245,10 +252,12 @@ class Way < ActiveRecord::Base
     Way.transaction do
       check_consistency(self, new_way, user)
       if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id",
     Way.transaction do
       check_consistency(self, new_way, user)
       if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id",

-                             :conditions => [ "visible = ? AND member_type='way' and member_id=? ", true, self.id])
+                             :conditions => [ "visible = ? AND member_type='Way' and member_id=? ", true, self.id])

         raise OSM::APIPreconditionFailedError.new("You need to make sure that this way is not a member of a relation.")
       else
         self.changeset_id = new_way.changeset_id
         raise OSM::APIPreconditionFailedError.new("You need to make sure that this way is not a member of a relation.")
       else
         self.changeset_id = new_way.changeset_id

+        self.changeset = new_way.changeset
+

         self.tags = []
         self.nds = []
         self.visible = false
         self.tags = []
         self.nds = []
         self.visible = false


@@ -257,30 +266,6 @@ class Way < ActiveRecord::Base
     end
   end
 
     end
   end
 

-  # delete a way and its nodes that aren't part of other ways, with history
-
-  # FIXME: merge the potlatch code to delete the relations
-  #        and refactor to use delete_with_history!
-  # This really needs the ids and versions of the nodes/relations to be passed in too
-  # so that we can do the version checking before the delete
-  def delete_with_relations_and_nodes_and_history(changeset_id)
-    # delete the nodes not used by other ways
-    self.unshared_node_ids.each do |node_id|
-      n = Node.find(node_id)
-      n.changeset_id = changeset_id
-      n.visible = false
-      # FIXME next line is bad
-      n.save_with_history!
-    end
-    
-    self.changeset_id = changeset_id
-    self.tags = []
-    self.nds = []
-    self.visible = false
-    # FIXME next line is bad
-    self.save_with_history!
-  end
-

   # Find nodes that belong to this way only
   def unshared_node_ids
     node_ids = self.nodes.collect { |node| node.id }
   # Find nodes that belong to this way only
   def unshared_node_ids
     node_ids = self.nodes.collect { |node| node.id }


@@ -317,13 +302,14 @@ class Way < ActiveRecord::Base
   private
   
   def save_with_history!
   private
   
   def save_with_history!

-    t = Time.now
+    t = Time.now.getutc

 
 

-    # update the bounding box, but don't save it as the controller knows the 
-    # lifetime of the change better. note that this has to be done both before 
+    # update the bounding box, note that this has to be done both before 

     # and after the save, so that nodes from both versions are included in the 
     # and after the save, so that nodes from both versions are included in the 

-    # bbox.
-    changeset.update_bbox!(bbox) unless nodes.empty?
+    # bbox. we use a copy of the changeset so that it isn't reloaded
+    # later in the save.
+    cs = self.changeset
+    cs.update_bbox!(bbox) unless nodes.empty?

 
     Way.transaction do
       self.version += 1
 
     Way.transaction do
       self.version += 1


@@ -355,14 +341,18 @@ class Way < ActiveRecord::Base
       old_way.timestamp = t
       old_way.save_with_dependencies!
 
       old_way.timestamp = t
       old_way.save_with_dependencies!
 

+      # reload the way so that the nodes array points to the correct
+      # new set of nodes.
+      self.reload
+

       # update and commit the bounding box, now that way nodes 
       # have been updated and we're in a transaction.
       # update and commit the bounding box, now that way nodes 
       # have been updated and we're in a transaction.

-      changeset.update_bbox!(bbox) unless nodes.empty?
+      cs.update_bbox!(bbox) unless nodes.empty?

 
       # tell the changeset we updated one element only
 
       # tell the changeset we updated one element only

-      changeset.add_changes! 1
+      cs.add_changes! 1

 
 

-      changeset.save!
+      cs.save!

     end
   end
 
     end
   end