X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/a855d20ba484c35b95412828718e5ca027876cb3..6339473cb77e4e0998b959a0835a8f42767f608d:/app/models/way.rb?ds=sidebyside

diff --git a/app/models/way.rb b/app/models/way.rb
index 121dff8bd..1304d8a18 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -1,14 +1,24 @@
 class Way < ActiveRecord::Base
   require 'xml/libxml'
+  
+  include ConsistencyValidations
 
-  belongs_to :user
+  set_table_name 'current_ways'
 
-  has_many :way_nodes, :foreign_key => 'id', :order => 'sequence_id'
-  has_many :way_tags, :foreign_key => 'id'
+  validates_presence_of :changeset_id, :timestamp
+  validates_inclusion_of :visible, :in => [ true, false ]
+  
+  belongs_to :changeset
 
   has_many :old_ways, :foreign_key => 'id', :order => 'version'
 
-  set_table_name 'current_ways'
+  has_many :way_nodes, :foreign_key => 'id', :order => 'sequence_id'
+  has_many :nodes, :through => :way_nodes, :order => 'sequence_id'
+
+  has_many :way_tags, :foreign_key => 'id'
+
+  has_many :containing_relation_members, :class_name => "RelationMember", :as => :member
+  has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder
 
   def self.from_xml(xml, create=false)
     begin
@@ -16,32 +26,41 @@ class Way < ActiveRecord::Base
       p.string = xml
       doc = p.parse
 
-      way = Way.new
-
       doc.find('//osm/way').each do |pt|
-        if !create and pt['id'] != '0'
-          way.id = pt['id'].to_i
-        end
+	return Way.from_xml_node(pt, create)
+      end
+    rescue
+      return nil
+    end
+  end
 
-        if create
-          way.timestamp = Time.now
-          way.visible = true
-        else
-          if pt['timestamp']
-            way.timestamp = Time.parse(pt['timestamp'])
-          end
-        end
+  def self.from_xml_node(pt, create=false)
+    way = Way.new
 
-        pt.find('tag').each do |tag|
-          way.add_tag_keyval(tag['k'], tag['v'])
-        end
+    if !create and pt['id'] != '0'
+      way.id = pt['id'].to_i
+    end
+    
+    way.version = pt['version']
+    way.changeset_id = pt['changeset']
 
-        pt.find('nd').each do |nd|
-          way.add_nd_num(nd['ref'])
-        end
+    if create
+      way.timestamp = Time.now
+      way.visible = true
+    else
+      if pt['timestamp']
+        way.timestamp = Time.parse(pt['timestamp'])
       end
-    rescue
-      way = nil
+      # if visible isn't present then it defaults to true
+      way.visible = (pt['visible'] or true)
+    end
+
+    pt.find('tag').each do |tag|
+      way.add_tag_keyval(tag['k'], tag['v'])
+    end
+
+    pt.find('nd').each do |nd|
+      way.add_nd_num(nd['ref'])
     end
 
     return way
@@ -69,18 +88,20 @@ class Way < ActiveRecord::Base
     el1['id'] = self.id.to_s
     el1['visible'] = self.visible.to_s
     el1['timestamp'] = self.timestamp.xmlschema
+    el1['version'] = self.version.to_s
+    el1['changeset'] = self.changeset_id.to_s
 
     user_display_name_cache = {} if user_display_name_cache.nil?
 
-    if user_display_name_cache and user_display_name_cache.key?(self.user_id)
+    if user_display_name_cache and user_display_name_cache.key?(self.changeset.user_id)
       # use the cache if available
-    elsif self.user.data_public?
-      user_display_name_cache[self.user_id] = self.user.display_name
+    elsif self.changeset.user.data_public?
+      user_display_name_cache[self.changeset.user_id] = self.changeset.user.display_name
     else
-      user_display_name_cache[self.user_id] = nil
+      user_display_name_cache[self.changeset.user_id] = nil
     end
 
-    el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil?
+    el1['user'] = user_display_name_cache[self.changeset.user_id] unless user_display_name_cache[self.changeset.user_id].nil?
 
     # make sure nodes are output in sequence_id order
     ordered_nodes = []
@@ -150,6 +171,11 @@ class Way < ActiveRecord::Base
 
   def add_tag_keyval(k, v)
     @tags = Hash.new unless @tags
+
+    # duplicate tags are now forbidden, so we can't allow values
+    # in the hash to be overwritten.
+    raise OSM::APIDuplicateTagsError.new if @tags.include? k
+
     @tags[k] = v
   end
 
@@ -157,15 +183,12 @@ class Way < ActiveRecord::Base
     t = Time.now
 
     Way.transaction do
+      self.version += 1
       self.timestamp = t
       self.save!
-    end
 
-    WayTag.transaction do
       tags = self.tags
-
       WayTag.delete_all(['id = ?', self.id])
-
       tags.each do |k,v|
         tag = WayTag.new
         tag.k = k
@@ -173,13 +196,9 @@ class Way < ActiveRecord::Base
         tag.id = self.id
         tag.save!
       end
-    end
 
-    WayNode.transaction do
       nds = self.nds
-
       WayNode.delete_all(['id = ?', self.id])
-
       sequence = 1
       nds.each do |n|
         nd = WayNode.new
@@ -188,11 +207,33 @@ class Way < ActiveRecord::Base
         nd.save!
         sequence += 1
       end
+
+      old_way = OldWay.from_way(self)
+      old_way.timestamp = t
+      old_way.save_with_dependencies!
     end
+  end
 
-    old_way = OldWay.from_way(self)
-    old_way.timestamp = t
-    old_way.save_with_dependencies!
+  def update_from(new_way, user)
+    check_consistency(self, new_way, user)
+    if !new_way.preconditions_ok?
+      raise OSM::APIPreconditionFailedError.new
+    end
+    self.changeset_id = new_way.changeset_id
+    self.tags = new_way.tags
+    self.nds = new_way.nds
+    self.visible = true
+    save_with_history!
+  end
+
+  def create_with_history(user)
+    check_create_consistency(self, user)
+    if !self.preconditions_ok?
+      raise OSM::APIPreconditionFailedError.new
+    end
+    self.version = 0
+    self.visible = true
+    save_with_history!
   end
 
   def preconditions_ok?
@@ -206,15 +247,14 @@ class Way < ActiveRecord::Base
     return true
   end
 
-  # Delete the way and it's relations, but don't really delete it - set its visibility to false and update the history etc to maintain wiki-like functionality.
-  def delete_with_relations_and_history(user)
+  def delete_with_history!(new_way, user)
+    check_consistency(self, new_way, user)
     if self.visible
-      # omg FIXME
       if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id",
-                             :conditions => [ "visible = 1 AND member_type='way' and member_id=?", self.id])
+                             :conditions => [ "visible = 1 AND member_type='way' and member_id=? ", self.id])
         raise OSM::APIPreconditionFailedError
       else
-        self.user_id = user.id
+        self.changeset_id = new_way.changeset_id
         self.tags = []
         self.nds = []
         self.visible = false
@@ -226,38 +266,37 @@ class Way < ActiveRecord::Base
   end
 
   # delete a way and it's nodes that aren't part of other ways, with history
-  # WARNING, INCOMPLETE - Read the code
+
+  # FIXME: merge the potlatch code to delete the relations
   def delete_with_relations_and_nodes_and_history(user)
-    return false # until complete, just return false
-    
-    node_ids = self.nodes.collect {|node| node.id }
-    node_ids_not_to_delete = []
-    way_nodes = WayNode.find(:all, :conditions => "node_id in [#{node_ids.join(',')}] and id not #{self.id}")
+    # delete the nodes not used by other ways
+    self.unshared_node_ids.each do |node_id|
+      n = Node.find(node_id)
+      n.user_id = user.id
+      n.visible = false
+      n.save_with_history!
+    end
     
-    node_ids_not_to_delete = way_nodes.collect {|way_node| way_node.node_id}
-
-    nodes_to_delete = node_ids - node_ids_not_to_delete
+    # FIXME needs more information passed in so that the changeset can be updated
+    self.user_id = user.id
 
-    # update the visibility etc on the current nodes
-    update_time = Time.now()
-    
-    Node.update(node_ids_to_delete, {:user_id = user.id, :timestamp => update_time, :visibility => false})
+    self.delete_with_history(user)
+  end
 
-    # create old nodes
+  # Find nodes that belong to this way only
+  def unshared_node_ids
+    node_ids = self.nodes.collect { |node| node.id }
 
-    old_nodes_to_create = []
-    OldNode.find(node_ids_to_delete).each do |old_node|
-      old_nodes_to_create << {:id => old_node.id, :timestamp => update_time, :latitude => old_node.latitude, :longitude => old_node.longitude, :visible => false}
+    unless node_ids.empty?
+      way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
+      node_ids = node_ids - way_nodes.collect { |way_node| way_node.node_id }
     end
 
-    OldNode.create(old_nodes_to_create)
-
-    # FIXME - the old nodes need to have their tile updated and I have no idea how that works
-    # they also need their tags copied over, and that depends on normalising the tags out to their own table that nicks working on
-
-    # finally, delete the way
-    
-    self.delete_with_relations_and_history
+    return node_ids
+  end
 
+  # Temporary method to match interface to nodes
+  def tags_as_hash
+    return self.tags
   end
 end