Added callbacks

lib/web.rb

@@ -38,3 +38,4 @@ module Web
 end
 
 dir = File.expand_path(File.join(File.dirname(__FILE__), 'web'))
+require dir + '/callbacks'

lib/web/callbacks.rb

@@ -0,0 +1,16 @@
+module Web
+  module Callbacks
+    def callbacks
+      @callbacks ||= Hash.new { |h,k| h[k] = [] }
+    end
+    
+    def add_callback(name, &block)
+      callbacks[name] << block
+    end
+    
+    def run_callback(name, *args)
+      args = args.first if args.size == 1
+      callbacks[name].map { |block| block.call(args) }
+    end
+  end
+end

lib/web/version.rb

@@ -0,0 +1,9 @@
+module Web
+  module VERSION #:nodoc:
+    MAJOR = 0
+    MINOR = 0
+    TINY  = 1
+
+    STRING = [MAJOR, MINOR, TINY].join('.')
+  end
+end

spec/spec/callbacks_spec.rb

@@ -0,0 +1,37 @@
+require File.join(File.dirname(__FILE__), '..', 'spec_helper')
+
+class Foo
+  extend Web::Callbacks
+  
+  add_callback 'after_initialize' do
+    'running after_initialize'
+  end
+  
+  add_callback 'after_request' do
+    'running after_request'
+  end
+  
+  add_callback 'after_request' do
+    'another callback for after_request'
+  end
+end
+
+describe Web::Callbacks do
+  it 'should know the callbacks that have been added' do
+    Foo.callbacks.keys.should == %w[after_request after_initialize]
+  end
+  
+  it 'should be able to add callbacks' do
+    Foo.add_callback('foobar') do
+      'do foobar'
+    end.first.kind_of?(Proc).should == true
+  end
+  
+  it 'should be able to run a callback' do
+    Foo.run_callback('after_initialize').should == ['running after_initialize']
+  end
+  
+  it 'should be able to run multiple callbacks' do
+    Foo.run_callback('after_request').should == ['running after_request', 'another callback for after_request']
+  end
+end