Add cost object reference to API v3

lib/api/v3/cost_objects/cost_object_model.rb

@@ -0,0 +1,55 @@
+#-- encoding: UTF-8
+#-- copyright
+# OpenProject is a project management system.
+# Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2013 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See doc/COPYRIGHT.rdoc for more details.
+#++
+
+require 'reform'
+require 'reform/form/coercion'
+
+module API
+  module V3
+    module CostObjects
+      class CostObjectModel < Reform::Form
+        include Coercion
+        include GravatarImageTag
+
+        property :project_id, type: Integer
+        property :author, type: String
+        property :subject, type: String
+        property :description, type: String
+        property :type, type: String
+        property :fixed_date, type: DateTime
+        property :created_on, type: DateTime
+        property :updated_on, type: DateTime
+
+        def author
+          ::API::V3::Users::UserModel.new(model.author) unless model.author.nil?
+        end
+      end
+    end
+  end
+end

lib/api/v3/cost_objects/cost_object_representer.rb

@@ -0,0 +1,69 @@
+#-- encoding: UTF-8
+#-- copyright
+# OpenProject is a project management system.
+# Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2013 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See doc/COPYRIGHT.rdoc for more details.
+#++
+
+require 'roar/decorator'
+require 'roar/representer/json/hal'
+
+module API
+  module V3
+    module CostObjects
+      class CostObjectRepresenter < Roar::Decorator
+        include Roar::Representer::JSON::HAL
+        include Roar::Representer::Feature::Hypermedia
+        include OpenProject::StaticRouting::UrlHelpers
+
+        self.as_strategy = API::Utilities::CamelCasingStrategy.new
+
+        def initialize(model, options = {}, *expand)
+          @expand = expand
+
+          super(model)
+        end
+
+        property :_type, exec_context: :decorator
+
+        property :id, render_nil: true
+        property :project_id
+        property :project_name, getter: -> (*) { model.project.try(:name) }
+        property :subject, render_nil: true
+        property :description, render_nil: true
+        property :type, render_nil: true
+        property :fixed_date, getter: -> (*) { model.created_on.utc.iso8601 }, render_nil: true
+        property :created_at, getter: -> (*) { model.created_on.utc.iso8601 }, render_nil: true
+        property :updated_at, getter: -> (*) { model.updated_on.utc.iso8601 }, render_nil: true
+
+        property :author, embedded: true, class: ::API::V3::Users::UserModel, decorator: ::API::V3::Users::UserRepresenter, if: -> (*) { !author.nil? }
+
+        def _type
+          'CostObject'
+        end
+      end
+    end
+  end
+end

lib/open_project/costs/engine.rb

@@ -105,10 +105,21 @@ module OpenProject::Costs
 
 
     extend_api_response(:v3, :work_packages, :work_package) do
+      property :cost_object,
+               exec_context: :decorator,
+               embedded: true,
+               class: ::API::V3::CostObjects::CostObjectModel,
+               decorator: ::API::V3::CostObjects::CostObjectRepresenter,
+               if: -> (*) { !represented.work_package.cost_object.nil? }
+
       property :spent_hours,
                exec_context: :decorator,
                if: -> (*) { current_user_allowed_to_view_spent_hours }
 
+      send(:define_method, :cost_object) do
+        ::API::V3::CostObjects::CostObjectModel.new(represented.work_package.cost_object)
+      end
+
       send(:define_method, :spent_hours) do
         attributes_helper = OpenProject::Costs::AttributesHelper.new(represented.work_package)