X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/86b4d1bc2c05a68053c7485217144a7fcf8ef4e8..cf24a5a3ee68905c5f55cf6f17c5d2ea983cb34f:/app/models/relation.rb

diff --git a/app/models/relation.rb b/app/models/relation.rb
index 984732c71..436c1e32e 100644
--- a/app/models/relation.rb
+++ b/app/models/relation.rb
@@ -1,14 +1,19 @@
 class Relation < ActiveRecord::Base
   require 'xml/libxml'
   
-  belongs_to :user
+  include ConsistencyValidations
+  
+  set_table_name 'current_relations'
 
-  has_many :relation_members, :foreign_key => 'id'
-  has_many :relation_tags, :foreign_key => 'id'
+  belongs_to :changeset
 
   has_many :old_relations, :foreign_key => 'id', :order => 'version'
 
-  set_table_name 'current_relations'
+  has_many :relation_members, :foreign_key => 'id'
+  has_many :relation_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
@@ -32,13 +37,14 @@ class Relation < ActiveRecord::Base
     end
 
     relation.version = pt['version']
+    relation.changeset_id = pt['changeset']
 
     if create
       relation.timestamp = Time.now
       relation.visible = true
     else
       if pt['timestamp']
-	relation.timestamp = Time.parse(pt['timestamp'])
+        relation.timestamp = Time.parse(pt['timestamp'])
       end
     end
 
@@ -65,18 +71,19 @@ class Relation < ActiveRecord::Base
     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?
 
     self.relation_members.each do |member|
       p=0
@@ -109,28 +116,35 @@ class Relation < ActiveRecord::Base
     return el1
   end 
 
-    
-  # collect relationships. currently done in one big block at the end;
-  # may need to move this upwards if people want automatic completion of
-  # relationships, i.e. deliver referenced objects like we do with ways... 
-  # FIXME: rip out the fucking SQL
-  def self.find_for_nodes_and_ways(node_ids, way_ids)
-    relations = []
-
-    if node_ids.length > 0
-      relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
-            "e.visible=1 and " +
-            "em.id = e.id and em.member_type='node' and em.member_id in (#{node_ids.join(',')})")
-    end
-    if way_ids.length > 0
-      relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
-            "e.visible=1 and " +
-            "em.id = e.id and em.member_type='way' and em.member_id in (#{way_ids.join(',')})")
+  def self.find_for_nodes(ids, options = {})
+    if ids.empty?
+      return []
+    else
+      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'node' AND current_relation_members.member_id IN (#{ids.join(',')})" }) do
+        return self.find(:all, options)
+      end
     end
+  end
 
-    relations # if you don't do this then it returns nil and not []
+  def self.find_for_ways(ids, options = {})
+    if ids.empty?
+      return []
+    else
+      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'way' AND current_relation_members.member_id IN (#{ids.join(',')})" }) do
+        return self.find(:all, options)
+      end
+    end
   end
 
+  def self.find_for_relations(ids, options = {})
+    if ids.empty?
+      return []
+    else
+      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'relation' AND current_relation_members.member_id IN (#{ids.join(',')})" }) do
+        return self.find(:all, options)
+      end
+    end
+  end
 
   # FIXME is this really needed?
   def members
@@ -168,6 +182,11 @@ class Relation < 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
 
@@ -205,16 +224,19 @@ class Relation < ActiveRecord::Base
     end
   end
 
-  def delete_with_history(user)
+  def delete_with_history(new_relation, user)
     if self.visible
+      check_consistency(self, new_relation, user)
       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=?", self.id ])
-	raise OSM::APIPreconditionFailedError.new
+        raise OSM::APIPreconditionFailedError.new
       else
-	self.user_id = user.id
-	self.tags = []
-	self.members = []
-	self.visible = false
-	save_with_history!
+        #self.user_id = user.id
+        # FIXME we need to deal with changeset here, which is probably already dealt with
+        self.changeset_id = new_relation.changeset_id
+        self.tags = []
+        self.members = []
+        self.visible = false
+        save_with_history!
       end
     else
       raise OSM::APIAlreadyDeletedError.new
@@ -222,36 +244,73 @@ class Relation < ActiveRecord::Base
   end
 
   def update_from(new_relation, user)
+    check_consistency(self, new_relation, user)
     if !new_relation.preconditions_ok?
       raise OSM::APIPreconditionFailedError.new
-    elsif new_relation.version != version
-      raise OSM::APIVersionMismatchError.new(new_relation.version, version)
-    else
-      self.user_id = user.id
-      self.tags = new_relation.tags
-      self.members = new_relation.members
-      self.visible = true
-      save_with_history!
     end
+    # FIXME need to deal with changeset etc
+    #self.user_id = user.id
+    self.changeset_id = new_relation.changeset_id
+    self.tags = new_relation.tags
+    self.members = new_relation.members
+    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?
+    # These are hastables that store an id in the index of all 
+    # the nodes/way/relations that have already been added.
+    # Once we know the id of the node/way/relation exists
+    # we check to see if it is already existing in the hashtable
+    # if it does, then we return false. Otherwise
+    # we add it to the relevant hash table, with the value true..
+    # Thus if you have nodes with the ids of 50 and 1 already in the
+    # relation, then the hash table nodes would contain:
+    # => {50=>true, 1=>true}
+    nodes = Hash.new
+    ways = Hash.new
+    relations = Hash.new
     self.members.each do |m|
       if (m[0] == "node")
         n = Node.find(:first, :conditions => ["id = ?", m[1]])
         unless n and n.visible 
           return false
         end
+        if nodes[m[1]]
+          return false
+        else
+          nodes[m[1]] = true
+        end
       elsif (m[0] == "way")
         w = Way.find(:first, :conditions => ["id = ?", m[1]])
         unless w and w.visible and w.preconditions_ok?
           return false
         end
+        if ways[m[1]]
+          return false
+        else
+          ways[m[1]] = true
+        end
       elsif (m[0] == "relation")
         e = Relation.find(:first, :conditions => ["id = ?", m[1]])
         unless e and e.visible and e.preconditions_ok?
           return false
         end
+        if relations[m[1]]
+          return false
+        else
+          relations[m[1]] = true
+        end
       else
         return false
       end
@@ -261,4 +320,8 @@ class Relation < ActiveRecord::Base
     return false
   end
 
+  # Temporary method to match interface to nodes
+  def tags_as_hash
+    return self.tags
+  end
 end