Created
January 28, 2013 00:51
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pubsub
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require "delegate" | |
class PostsController < ApplicationController | |
respond_to :html, :json | |
module PubSub | |
def add_observer(observer) | |
(@observers ||= []) << observer | |
end | |
def publish(event, *args) | |
@observers.each do |observer| | |
observer.send(event, *args) if observer.respond_to? event | |
end if @observers | |
end | |
end | |
class PostMailer | |
def post_created(post) | |
Rails.logger.info "-- sending email" | |
end | |
end | |
class HtmlResponder < SimpleDelegator | |
def post_created(post) | |
redirect_to post, notice: 'Post was successfully created.' | |
end | |
def post_create_failed(post) | |
render action: "new" | |
end | |
end | |
class PostCreator | |
include PubSub | |
def initialize(post) | |
@post = post | |
end | |
def create | |
if @post.save | |
publish(:post_created, @post) | |
else | |
publish(:post_create_failed, @post) | |
end | |
end | |
end | |
def create | |
@post = Post.new(params[:post]) | |
post_creator = PostCreator.new(@post) | |
post_creator.add_observer HtmlResponder.new(self) | |
post_creator.add_observer PostMailer.new(params) | |
post_creator.create | |
end | |
end |
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