Contents

# frozen_string_literal: true

module ActionPolicy
  module Behaviours
    # Adds `policy_for` method
    module PolicyFor
      require "action_policy/ext/policy_cache_key"
      using ActionPolicy::Ext::PolicyCacheKey

      # Returns policy instance for the record.
      def policy_for(record:, with: nil, namespace: authorization_namespace, context: authorization_context, allow_nil: false)
        policy_class = with || ::ActionPolicy.lookup(record, namespace: namespace, context: context, allow_nil: allow_nil)
        policy_class&.new(record, **context)
      end

      def authorization_context
        raise NotImplementedError, "Please, define `authorization_context` method!"
      end

      def authorization_namespace
        # override to provide specific authorization namespace
      end

      # Override this method to provide implicit authorization target
      # that would be used in case `record` is not specified in
      # `authorize!` and `allowed_to?` call.
      #
      # It is also used to infer a policy for scoping (in `authorized_scope` method).
      def implicit_authorization_target
        # no-op
      end

      # Return implicit authorization target or raises an exception if it's nil
      def implicit_authorization_target!
        implicit_authorization_target || raise(
          NotFound,
          [
            self,
            "Couldn't find implicit authorization target " \
            "for #{self.class}. " \
            "Please, provide policy class explicitly using `with` option or " \
            "define the `implicit_authorization_target` method."
          ]
        )
      end

      def policy_for_cache_key(record:, with: nil, namespace: nil, context: authorization_context, **)
        record_key = record._policy_cache_key(use_object_id: true)
        context_key = context.values.map { |v| v._policy_cache_key(use_object_id: true) }.join(".")

        "#{namespace}/#{with}/#{context_key}/#{record_key}"
      end
    end
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
action_policy-0.4.4	lib/action_policy/behaviours/policy_for.rb
action_policy-0.4.3	lib/action_policy/behaviours/policy_for.rb
action_policy-0.4.2	lib/action_policy/behaviours/policy_for.rb
action_policy-0.4.1	lib/action_policy/behaviours/policy_for.rb
action_policy-0.4.0	lib/action_policy/behaviours/policy_for.rb