ActionPolicy i18n basics

action_policy__i18n.rb

# See issue: https://github.com/palkan/action_policy/issues/15

module ActionPolicy
  module I18n
    class << self
      def full_message(policy_class, rule)
        # generate candidates
        candidates = [:"#{policy_class.identifier}.#{rule}"]

        # add global fallbacks
        candidates << rule # e.g. "action_policy.policy.index?"
        candidates << ::I18n.t(:unauthorized, scope: [:action_policy])

        ::I18n.t(
          candidates.shift,
          default: candidates,
          scope: [:action_policy, :policy]
        )
      end
    end
  end
end

ActionPolicy::Policy::ExecutionResult.include(Module.new do
  def message
    ActionPolicy::I18n.full_message(policy, rule)
  end
end)

ActionPolicy::Policy::FailureReasons.include(Module.new do
  def full_messages
    reasons.flat_map do |policy_klass, rules|
      rules.map { |rule| ActionPolicy::I18n.full_message(policy_klass, rule) }
    end
  end
end)