Module: Anchor::Hooks::Hooked

Included in:
ClassMethods
Defined in:
lib/anchor/hooks.rb

Overview

Hooked

Instance Method Summary collapse

Instance Method Details

#add_hook_for_method(type, method, &block) ⇒ Object 



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# File 'lib/anchor/hooks.rb', line 31

def add_hook_for_method(type, method, &block)
  level, name = case method; when Hash; method.shift; when Symbol; [:instance, method]; end        
  # set hooks on metaclass instance, not self, if method has to be class method or self is a Object
  in_scope = :metaclass if level == :singleton or not self.is_a?(Class) 
  return Anchor.hook(class << self; self; end) do
    self.method(type).call(name, &block)
  end if in_scope == :metaclass        
  # replace orginal method with hooked method          
  instance_exec do
    hooks = @hooks ||= {}
    @hooks[name] ||= {}
    @hooks[name][type] ||= []
    @hooks[name][type] << block
    orginal_methods = @orginal_methods ||= {}
    
    unless @orginal_methods[name]
      orginal_methods[name] = self.instance_method(name)
      define_method name do |*args, &block|
        ihooks  = hooks[name] # instance hooks
        orginal_method = orginal_methods[name].bind(self)
        # before
        ihooks[:before].each {|proc| proc.call(*args, &block) } if ihooks[:before]
        # TODO: around
        retval=orginal_method.call(*args, &block)
        # after
        ihooks[:after].each {|proc| proc.call(*args, &block) } if ihooks[:after]
        retval
      end
    end
    
  end
end

#add_hook_for_methods(type, *methods, &block) ⇒ Object Also known as: add_hook 



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# File 'lib/anchor/hooks.rb', line 26

def add_hook_for_methods(type, *methods, &block)
  methods.flatten.each {|method| add_hook_for_method(type, method, &block)}      
end