Module: JSONAPIonify::Callbacks::ClassMethods

Defined in:
lib/jsonapionify/callbacks.rb

Instance Method Summary collapse

Instance Method Details

#define_callback_strategy(&strategy) ⇒ Object 



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# File 'lib/jsonapionify/callbacks.rb', line 9

def define_callback_strategy(&strategy)
  define_method(:__callback_strategy, &strategy)
end

#define_callbacks(*names) ⇒ Object 



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# File 'lib/jsonapionify/callbacks.rb', line 13

def define_callbacks(*names)
  names.each do |name|
    chains = {
      main:   "__#{name}_callback_chain",
      before: "__#{name}_before_callback_chain",
      after:  "__#{name}_after_callback_chain"
    }
    define_method chains[:main] do |*args, **, &block|
      block ||= proc {}
      false != send(chains[:before], *args) &&
        (value = JSONAPIonify::CustomRescue.perform(remove: __FILE__, source: block, formatter: ->(meta) { meta.source_location.join(':') + ":in callback: `run'" }) do
          __callback_strategy(*args, &block) || true
        end) &&
        false != send(chains[:after], *args) &&
        value
    end unless method_defined? chains[:main]

    # Define before and after chains
    %i{after before}.each do |timing|
      define_method chains[timing] { |*| } unless method_defined? chains[timing]
      callback_name = "#{timing}_#{name}"
      define_singleton_method callback_name do |sym = nil, &outer_block|
        outer_block = (outer_block || sym).to_proc
        prev_chain  = instance_method(chains[timing])
        define_method chains[timing] do |*args, &block|
          false != prev_chain.bind(self).call(*args, &block) &&
            JSONAPIonify::CustomRescue.perform(remove: __FILE__, source: outer_block, formatter: ->(meta) { meta.source_location.join(':') + ":in callback: `#{timing}_#{name}'" }) do
              __callback_strategy(*args, &outer_block)
            end
        end
      end
    end

    private(*chains.values)

  end
end