Class: Object

Inherits:
BasicObject
Defined in:
lib/clean-annotations/class_callbacks.rb,
lib/clean-annotations/method_attr.rb,
lib/clean-annotations/class_attribute.rb

Overview

Rails style callbacks

Instance Method Summary collapse

Instance Method Details

#class_attribute(name) ⇒ Object 



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# File 'lib/clean-annotations/class_attribute.rb', line 30

def class_attribute name
  self.class.send(name)
end

#define_callback(name) ⇒ Object 



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# File 'lib/clean-annotations/class_callbacks.rb', line 4

def define_callback name
  ivar = "@class_callbacks_#{name}"

  unless is_a?(Class) || is_a?(Module)
    raise ArgumentError, 'define_callback Can only be defined in a class or a module'
  end

  define_singleton_method(name) do |method_name=nil, &block|
    ref = caller[0].split(':in ').first

    self.instance_variable_set(ivar, {}) unless instance_variable_defined?(ivar)
    self.instance_variable_get(ivar)[ref] = method_name || block
  end
end

#method_attr(name = nil, &block) ⇒ Object 



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# File 'lib/clean-annotations/method_attr.rb', line 35

def method_attr name=nil, &block
  if respond_to?(:const_missing) && respond_to?(:ancestors)
    if name.nil?
      return MethodAttributes.get(self) || {}
    end

    MethodAttributes.define self, name, &block
  else
    # instance
    base = MethodAttributes.get(self.class)
    name ? base[name] : base
  end
end

#run_callback(name, *args) ⇒ Object 



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# File 'lib/clean-annotations/class_callbacks.rb', line 19

def run_callback name, *args
  ivar = "@class_callbacks_#{name}"

  list = is_a?(Class) || is_a?(Module) ? ancestors : self.class.ancestors
  list = list.slice 0, list.index(Object) if list.index(Object)

  list.reverse.each do |klass|
    if klass.instance_variable_defined?(ivar)
      mlist = klass.instance_variable_get(ivar).values
      mlist.each do |m|
        if m.is_a?(Symbol)
          send m, *args
        else
          instance_exec *args, &m
        end
      end
    end
  end
end