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

diff --git a/app/models/changeset.rb b/app/models/changeset.rb
index 4efd4f9e7f755e0655d4ee89f55bfcf989e6ed62..adb41b204eae382a80c4f4282c69a7b2d33e3a7a 100644 (file)
--- a/app/models/changeset.rb
+++ b/app/models/changeset.rb
@@ -1,17 +1,17 @@
 class Changeset < ActiveRecord::Base
   require 'xml/libxml'
 
 class Changeset < ActiveRecord::Base
   require 'xml/libxml'
 

-  belongs_to :user
+  belongs_to :user, :counter_cache => true
+
+  has_many :changeset_tags

 
 

-  has_many :changeset_tags, :foreign_key => 'id'
-  

   has_many :nodes
   has_many :ways
   has_many :relations
   has_many :old_nodes
   has_many :old_ways
   has_many :old_relations
   has_many :nodes
   has_many :ways
   has_many :relations
   has_many :old_nodes
   has_many :old_ways
   has_many :old_relations

-  
+

   validates_presence_of :id, :on => :update
   validates_presence_of :user_id, :created_at, :closed_at, :num_changes
   validates_uniqueness_of :id
   validates_presence_of :id, :on => :update
   validates_presence_of :user_id, :created_at, :closed_at, :num_changes
   validates_uniqueness_of :id


@@ -19,7 +19,8 @@ class Changeset < ActiveRecord::Base
   validates_numericality_of :min_lat, :max_lat, :min_lon, :max_lat, :allow_nil => true, :integer_only => true
   validates_numericality_of :user_id,  :integer_only => true
   validates_numericality_of :num_changes, :integer_only => true, :greater_than_or_equal_to => 0
   validates_numericality_of :min_lat, :max_lat, :min_lon, :max_lat, :allow_nil => true, :integer_only => true
   validates_numericality_of :user_id,  :integer_only => true
   validates_numericality_of :num_changes, :integer_only => true, :greater_than_or_equal_to => 0

-  validates_associated :user
+
+  before_save :update_closed_at

 
   # over-expansion factor to use when updating the bounding box
   EXPAND = 0.1
 
   # over-expansion factor to use when updating the bounding box
   EXPAND = 0.1


@@ -34,13 +35,13 @@ class Changeset < ActiveRecord::Base
   IDLE_TIMEOUT = 1.hour
 
   # Use a method like this, so that we can easily change how we
   IDLE_TIMEOUT = 1.hour
 
   # Use a method like this, so that we can easily change how we

-  # determine whether a changeset is open, without breaking code in at 
+  # determine whether a changeset is open, without breaking code in at

   # least 6 controllers
   def is_open?
     # a changeset is open (that is, it will accept further changes) when
     # it has not yet run out of time and its capacity is small enough.
     # note that this may not be a hard limit - due to timing changes and
   # least 6 controllers
   def is_open?
     # a changeset is open (that is, it will accept further changes) when
     # it has not yet run out of time and its capacity is small enough.
     # note that this may not be a hard limit - due to timing changes and

-    # concurrency it is possible that some changesets may be slightly 
+    # concurrency it is possible that some changesets may be slightly

     # longer than strictly allowed or have slightly more changes in them.
     return ((closed_at > Time.now.getutc) and (num_changes <= MAX_ELEMENTS))
   end
     # longer than strictly allowed or have slightly more changes in them.
     return ((closed_at > Time.now.getutc) and (num_changes <= MAX_ELEMENTS))
   end


@@ -50,30 +51,36 @@ class Changeset < ActiveRecord::Base
       self.closed_at = Time.now.getutc
     end
   end
       self.closed_at = Time.now.getutc
     end
   end

-  
+

   def self.from_xml(xml, create=false)
     begin
   def self.from_xml(xml, create=false)
     begin

-      p = XML::Parser.string(xml)
+      p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR)

       doc = p.parse
 
       doc = p.parse
 

-      cs = Changeset.new
-

       doc.find('//osm/changeset').each do |pt|
       doc.find('//osm/changeset').each do |pt|

-        if create
-          cs.created_at = Time.now.getutc
-          # initial close time is 1h ahead, but will be increased on each
-          # modification.
-          cs.closed_at = cs.created_at + IDLE_TIMEOUT
-          # initially we have no changes in a changeset
-          cs.num_changes = 0
-        end
-
-        pt.find('tag').each do |tag|
-          cs.add_tag_keyval(tag['k'], tag['v'])
-        end
+        return Changeset.from_xml_node(pt, create)

       end
       end

-    rescue Exception => ex
-      cs = nil
+      raise OSM::APIBadXMLError.new("changeset", xml, "XML doesn't contain an osm/changeset element.")
+    rescue LibXML::XML::Error, ArgumentError => ex
+      raise OSM::APIBadXMLError.new("changeset", xml, ex.message)
+    end
+  end
+
+  def self.from_xml_node(pt, create=false)
+    cs = Changeset.new
+    if create
+      cs.created_at = Time.now.getutc
+      # initial close time is 1h ahead, but will be increased on each
+      # modification.
+      cs.closed_at = cs.created_at + IDLE_TIMEOUT
+      # initially we have no changes in a changeset
+      cs.num_changes = 0
+    end
+
+    pt.find('tag').each do |tag|
+      raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing key") if tag['k'].nil?
+      raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing value") if tag['v'].nil?
+      cs.add_tag_keyval(tag['k'], tag['v'])

     end
 
     return cs
     end
 
     return cs


@@ -83,43 +90,24 @@ class Changeset < ActiveRecord::Base
   # returns the bounding box of the changeset. it is possible that some
   # or all of the values will be nil, indicating that they are undefined.
   def bbox
   # returns the bounding box of the changeset. it is possible that some
   # or all of the values will be nil, indicating that they are undefined.
   def bbox

-    @bbox ||= [ min_lon, min_lat, max_lon, max_lat ]
+    @bbox ||= BoundingBox.new(min_lon, min_lat, max_lon, max_lat)

   end
   end

-  
+

   def has_valid_bbox?
   def has_valid_bbox?

-    not bbox.include? nil
-  end
-  
-  ##
-  # returns area of the changset bbox as a rough comparitive quantity for use of changset displays
-  def area
-     if has_valid_bbox?
-            (max_lon - min_lon) * (max_lat - min_lat)
-     else
-            0
-     end
+    bbox.complete?

   end
 
   ##
   end
 
   ##

-  # expand the bounding box to include the given bounding box. also, 
+  # expand the bounding box to include the given bounding box. also,

   # expand a little bit more in the direction of the expansion, so that
   # expand a little bit more in the direction of the expansion, so that

-  # further expansions may be unnecessary. this is an optimisation 
+  # further expansions may be unnecessary. this is an optimisation

   # suggested on the wiki page by kleptog.
   # suggested on the wiki page by kleptog.

-  def update_bbox!(array)
-    # ensure that bbox is cached and has no nils in it. if there are any
-    # nils, just use the bounding box update to write over them.
-    @bbox = bbox.zip(array).collect { |a, b| a.nil? ? b : a }
-
-    # FIXME - this looks nasty and violates DRY... is there any prettier 
-    # way to do this? 
-    @bbox[0] = [-180 * GeoRecord::SCALE, array[0] + EXPAND * (@bbox[0] - @bbox[2])].max if array[0] < @bbox[0]
-    @bbox[1] = [ -90 * GeoRecord::SCALE, array[1] + EXPAND * (@bbox[1] - @bbox[3])].max if array[1] < @bbox[1]
-    @bbox[2] = [ 180 * GeoRecord::SCALE, array[2] + EXPAND * (@bbox[2] - @bbox[0])].min if array[2] > @bbox[2]
-    @bbox[3] = [  90 * GeoRecord::SCALE, array[3] + EXPAND * (@bbox[3] - @bbox[1])].min if array[3] > @bbox[3]
-
+  def update_bbox!(bbox_update)
+    bbox.expand!(bbox_update, EXPAND)
+      

     # update active record. rails 2.1's dirty handling should take care of
     # whether this object needs saving or not.
     # update active record. rails 2.1's dirty handling should take care of
     # whether this object needs saving or not.

-    self.min_lon, self.min_lat, self.max_lon, self.max_lat = @bbox
+    self.min_lon, self.min_lat, self.max_lon, self.max_lat = @bbox.to_a if bbox.complete?

   end
 
   ##
   end
 
   ##


@@ -150,6 +138,11 @@ class Changeset < ActiveRecord::Base
 
   def add_tag_keyval(k, v)
     @tags = Hash.new unless @tags
 
   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("changeset", self.id, k) if @tags.include? k
+

     @tags[k] = v
   end
 
     @tags[k] = v
   end
 


@@ -160,13 +153,13 @@ class Changeset < ActiveRecord::Base
       self.save!
 
       tags = self.tags
       self.save!
 
       tags = self.tags

-      ChangesetTag.delete_all(['id = ?', self.id])
+      ChangesetTag.delete_all(:changeset_id => self.id)

 
       tags.each do |k,v|
         tag = ChangesetTag.new
 
       tags.each do |k,v|
         tag = ChangesetTag.new

+        tag.changeset_id = self.id

         tag.k = k
         tag.v = v
         tag.k = k
         tag.v = v

-        tag.id = self.id

         tag.save!
       end
     end
         tag.save!
       end
     end


@@ -176,7 +169,7 @@ class Changeset < ActiveRecord::Base
   # set the auto-close time to be one hour in the future unless
   # that would make it more than 24h long, in which case clip to
   # 24h, as this has been decided is a reasonable time limit.
   # set the auto-close time to be one hour in the future unless
   # that would make it more than 24h long, in which case clip to
   # 24h, as this has been decided is a reasonable time limit.

-  def before_save
+  def update_closed_at

     if self.is_open?
       if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
         self.closed_at = created_at + MAX_TIME_OPEN
     if self.is_open?
       if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
         self.closed_at = created_at + MAX_TIME_OPEN


@@ -185,13 +178,13 @@ class Changeset < ActiveRecord::Base
       end
     end
   end
       end
     end
   end

-  
+

   def to_xml
     doc = OSM::API.new.get_xml_doc
     doc.root << to_xml_node()
     return doc
   end
   def to_xml
     doc = OSM::API.new.get_xml_doc
     doc.root << to_xml_node()
     return doc
   end

-  
+

   def to_xml_node(user_display_name_cache = nil)
     el1 = XML::Node.new 'changeset'
     el1['id'] = self.id.to_s
   def to_xml_node(user_display_name_cache = nil)
     el1 = XML::Node.new 'changeset'
     el1['id'] = self.id.to_s


@@ -215,16 +208,15 @@ class Changeset < ActiveRecord::Base
       el2['v'] = v.to_s
       el1 << el2
     end
       el2['v'] = v.to_s
       el1 << el2
     end

-    
+

     el1['created_at'] = self.created_at.xmlschema
     el1['closed_at'] = self.closed_at.xmlschema unless is_open?
     el1['open'] = is_open?.to_s
 
     el1['created_at'] = self.created_at.xmlschema
     el1['closed_at'] = self.closed_at.xmlschema unless is_open?
     el1['open'] = is_open?.to_s
 

-    el1['min_lon'] = (bbox[0].to_f / GeoRecord::SCALE).to_s unless bbox[0].nil?
-    el1['min_lat'] = (bbox[1].to_f / GeoRecord::SCALE).to_s unless bbox[1].nil?
-    el1['max_lon'] = (bbox[2].to_f / GeoRecord::SCALE).to_s unless bbox[2].nil?
-    el1['max_lat'] = (bbox[3].to_f / GeoRecord::SCALE).to_s unless bbox[3].nil?
-    
+    if bbox.complete?
+      bbox.to_unscaled.add_bounds_to(el1, '_')
+    end
+

     # NOTE: changesets don't include the XML of the changes within them,
     # they are just structures for tagging. to get the osmChange of a
     # changeset, see the download method of the controller.
     # NOTE: changesets don't include the XML of the changes within them,
     # they are just structures for tagging. to get the osmChange of a
     # changeset, see the download method of the controller.


@@ -238,10 +230,10 @@ class Changeset < ActiveRecord::Base
   # bounding box, only the tags of the changeset.
   def update_from(other, user)
     # ensure that only the user who opened the changeset may modify it.
   # bounding box, only the tags of the changeset.
   def update_from(other, user)
     # ensure that only the user who opened the changeset may modify it.

-    unless user.id == self.user_id 
+    unless user.id == self.user_id

       raise OSM::APIUserChangesetMismatchError.new
     end
       raise OSM::APIUserChangesetMismatchError.new
     end

-    
+

     # can't change a closed changeset
     unless is_open?
       raise OSM::APIChangesetAlreadyClosedError.new(self)
     # can't change a closed changeset
     unless is_open?
       raise OSM::APIChangesetAlreadyClosedError.new(self)