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module DeclarativePolicy
# The return value of a rule { ... } declaration.
# Can call back to register rules with the containing
# Policy class (context_class here). See Base.rule
#
# Note that the #policy method just performs an #instance_eval,
# which is useful for multiple #enable or #prevent callse.
#
# Also provides a #method_missing proxy to the context
# class's class methods, so that helper methods can be
# defined and used in a #policy { ... } block.
class PolicyDsl
def initialize(context_class, rule)
@context_class = context_class
@rule = rule
end
def policy(&b)
instance_eval(&b)
end
def enable(*abilities)
@context_class.enable_when(abilities, @rule)
end
def prevent(*abilities)
@context_class.prevent_when(abilities, @rule)
end
def prevent_all
@context_class.prevent_all_when(@rule)
end
def method_missing(m, *a, &b)
return super unless @context_class.respond_to?(m)
@context_class.__send__(m, *a, &b) # rubocop:disable GitlabSecurity/PublicSend
end
def respond_to_missing?(m)
@context_class.respond_to?(m) || super
end
end
end
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