X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/783528830ad1b0d5f07c8e758747841a0b4e5cc6..fddf6fb5299285b55aa7357c7e3052d591d462b2:/lib/consistency_validations.rb

diff --git a/lib/consistency_validations.rb b/lib/consistency_validations.rb
index 46fb3c06e..4f3881542 100644
--- a/lib/consistency_validations.rb
+++ b/lib/consistency_validations.rb
@@ -27,4 +27,19 @@ module ConsistencyValidations
       raise OSM::APIChangesetAlreadyClosedError.new(new.changeset)
     end
   end
+
+  ##
+  # subset of consistency checks which should be applied to almost
+  # all the changeset controller's writable methods.
+  def check_changeset_consistency(changeset, user)
+    # check user credentials - only the user who opened a changeset
+    # may alter it.
+    if changeset.nil?
+      raise OSM::APIChangesetMissingError.new
+    elsif user.id != changeset.user_id 
+      raise OSM::APIUserChangesetMismatchError.new
+    elsif not changeset.is_open?
+      raise OSM::APIChangesetAlreadyClosedError.new(changeset)
+    end
+  end
 end