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# frozen_string_literal: true
module Hyrax
module Transactions
module Steps
##
# A step that sets the uploaded date for an input `Valkyrie::Resource` or
# `ValkyrieChangeSet`.
#
# The uploaded date is derived in the following way:
#
# - if a `date_uploaded` is already present, keep it;
# - if there is no current `date_uploaded` but `date_modified` is
# present, use the value of `date_modified`.
# - if neither `date_uploaded` nor `date_modified` is present, set the
# time to now using the given `time_service`. `Hyrax::TimeService`
# is used by default.
#
# A useful pattern is to run this step immediately following one to set
# the `date_modified` to now, and just before validation and save. This
# pattern ensures the times for a newly created object have the same
# value as close to the actual save time as practicable, and avoids
# overwriting `date_uploaded` for existing objects.
#
# @since 3.0.0
class SetUploadedDateUnlessPresent
include Dry::Monads[:result]
##
# @param [#time_in_utc] time_service
def initialize(time_service: Hyrax::TimeService)
@time_service = time_service
end
##
# @note the implementation sets the uploaded date to
# `#date_modified` if it exists, falling back on the current datetime.
#
# @param [#date_uploaded=] obj
#
# @return [Dry::Monads::Result]
def call(obj)
return Failure[:no_date_uploaded_attribute, obj] unless
obj.respond_to?(:date_uploaded=)
obj.date_uploaded = date_uploaded(obj) if obj.date_uploaded.blank?
Success(obj)
end
private
def date_uploaded(obj)
obj.try(:date_modified).presence || @time_service.time_in_utc
end
end
end
end
end
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25 entries across 25 versions & 1 rubygems