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module CarrierWave
module Uploader
module Callbacks
extend ActiveSupport::Concern
included do
class_attribute :_before_callbacks, :_after_callbacks,
:instance_writer => false
self._before_callbacks = Hash.new []
self._after_callbacks = Hash.new []
end
def with_callbacks(kind, *args)
self.class._before_callbacks[kind].each { |c| send c, *args }
yield
self.class._after_callbacks[kind].each { |c| send c, *args }
end
module ClassMethods
def before(kind, callback)
self._before_callbacks = self._before_callbacks.
merge kind => _before_callbacks[kind] + [callback]
end
def after(kind, callback)
self._after_callbacks = self._after_callbacks.
merge kind => _after_callbacks[kind] + [callback]
end
end # ClassMethods
end # Callbacks
end # Uploader
end # CarrierWave
|
