Module: DelegateVia::ClassMethods

Defined in:
lib/pad/delegate_via.rb

Instance Method Summary collapse

Instance Method Details

#delegate_via(accessor_name, *method_names, &return_block) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/MethodLength



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
# File 'lib/pad/delegate_via.rb', line 11

def delegate_via(accessor_name, *method_names, &return_block)
  options    = method_names.last.is_a?(Hash) ? method_names.pop : {}
  via_method = options.fetch(:via, :map)

  mod = if const_defined?(:DelegateVia, false)
          const_get(:DelegateVia)
        else
          new_mod = Module.new do
            def self.to_s
              "DelegateVia(#{instance_methods(false).join(', ')})"
            end
          end
          const_set(:DelegateVia, new_mod)
        end

  mod.module_eval do
    method_names.each do |method_name|
      define_method method_name do |*args, &block|
        accessor = __send__(accessor_name)
        result   = accessor.__send__(via_method) { |service| service.__send__(method_name, *args, &block) }
        return_block ? instance_exec(result, &return_block) : result
      end
    end
  end
  include mod
end