X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/c64ebb9139dd5a25b82b6e8170d3b554cf45d516..70dfeb0f3b32f61302412730653b28604b1b9e6b:/app/models/changeset.rb

diff --git a/app/models/changeset.rb b/app/models/changeset.rb
index 53078b2e8..8e51cead2 100644
--- a/app/models/changeset.rb
+++ b/app/models/changeset.rb
@@ -56,26 +56,38 @@ class Changeset < ActiveRecord::Base
       p = XML::Parser.string(xml)
       doc = p.parse
 
-      cs = Changeset.new
-
       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
-    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
+    else
+      raise OSM::APIBadXMLError.new("changeset", pt, "ID is required when updating.") if pt['id'].nil?
+      cs.id = pt['id'].to_i
+      # .to_i will return 0 if there is no number that can be parsed.
+      # We want to make sure that there is no id with zero anyway.
+      raise OSM::APIBadUserInput.new("ID of changeset cannot be zero when updating.") if cs.id == 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
 
@@ -89,6 +101,16 @@ class Changeset < ActiveRecord::Base
   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
+  end
 
   ##
   # expand the bounding box to include the given bounding box. also, 
@@ -102,10 +124,10 @@ class Changeset < ActiveRecord::Base
 
     # FIXME - this looks nasty and violates DRY... is there any prettier 
     # way to do this? 
-    @bbox[0] = array[0] + EXPAND * (@bbox[0] - @bbox[2]) if array[0] < @bbox[0]
-    @bbox[1] = array[1] + EXPAND * (@bbox[1] - @bbox[3]) if array[1] < @bbox[1]
-    @bbox[2] = array[2] + EXPAND * (@bbox[2] - @bbox[0]) if array[2] > @bbox[2]
-    @bbox[3] = array[3] + EXPAND * (@bbox[3] - @bbox[1]) if array[3] > @bbox[3]
+    @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]
 
     # update active record. rails 2.1's dirty handling should take care of
     # whether this object needs saving or not.
@@ -140,23 +162,18 @@ class Changeset < 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("changeset", self.id, k) if @tags.include? k
+
     @tags[k] = v
   end
 
   def save_with_tags!
-    t = Time.now.getutc
-
     # do the changeset update and the changeset tags update in the
     # same transaction to ensure consistency.
     Changeset.transaction do
-      # 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.
-      if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
-        self.closed_at = created_at + MAX_TIME_OPEN
-      else
-        self.closed_at = Time.now.getutc + IDLE_TIMEOUT
-      end
       self.save!
 
       tags = self.tags
@@ -171,6 +188,20 @@ class Changeset < ActiveRecord::Base
       end
     end
   end
+
+  ##
+  # 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
+    if self.is_open?
+      if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
+        self.closed_at = created_at + MAX_TIME_OPEN
+      else
+        self.closed_at = Time.now.getutc + IDLE_TIMEOUT
+      end
+    end
+  end
   
   def to_xml
     doc = OSM::API.new.get_xml_doc
@@ -225,7 +256,7 @@ class Changeset < ActiveRecord::Base
   def update_from(other, user)
     # ensure that only the user who opened the changeset may modify it.
     unless user.id == self.user_id 
-      raise OSM::APIUserChangesetMismatchError 
+      raise OSM::APIUserChangesetMismatchError.new
     end
     
     # can't change a closed changeset