first commit

.document

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+lib/**/*.rb
+bin/*
+- 
+features/**/*.feature
+LICENSE.txt

.gitignore

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+# rcov generated
+coverage
+
+# rdoc generated
+rdoc
+
+# yard generated
+doc
+.yardoc
+
+# bundler
+.bundle
+
+# jeweler generated
+pkg
+
+# Have editor/IDE/OS specific files you need to ignore? Consider using a global gitignore: 
+#
+# * Create a file at ~/.gitignore
+# * Include files you want ignored
+# * Run: git config --global core.excludesfile ~/.gitignore
+#
+# After doing this, these files will be ignored in all your git projects,
+# saving you from having to 'pollute' every project you touch with them
+#
+# Not sure what to needs to be ignored for particular editors/OSes? Here's some ideas to get you started. (Remember, remove the leading # of the line)
+#
+# For MacOS:
+#
+#.DS_Store
+
+# For TextMate
+#*.tmproj
+#tmtags
+
+# For emacs:
+#*~
+#\#*
+#.\#*
+
+# For vim:
+#*.swp
+
+# For redcar:
+#.redcar
+
+# For rubinius:
+#*.rbc

.infinity_test

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+infinity_test do
+  before_run do
+    clear :terminal
+  end
+end

.rvmrc

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+rvm use ree-1.8.7-2011.03@twilio_flow

Gemfile

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+source 'http://rubygems.org'
+
+group :development do
+  gem 'shoulda', '>= 0'
+  gem 'bundler', '~> 1.0.0'
+  gem 'jeweler', '~> 1.6.4'
+  gem 'rcov', '>= 0'
+  gem 'test-unit', :require => 'test/unit'
+  gem 'infinity_test'
+  gem 'actionpack', '~> 2.3.10'
+  gem 'mocha'
+end
+
+gem 'builder'
+gem 'state_machine'

Gemfile.lock

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+GEM
+  remote: http://rubygems.org/
+  specs:
+    actionpack (2.3.12)
+      activesupport (= 2.3.12)
+      rack (~> 1.1.0)
+    activesupport (2.3.12)
+    builder (3.0.0)
+    git (1.2.5)
+    infinity_test (1.0.3)
+      notifiers (>= 1.1.0)
+      watchr (>= 0.7)
+    jeweler (1.6.4)
+      bundler (~> 1.0)
+      git (>= 1.2.5)
+      rake
+    mocha (0.9.12)
+    notifiers (1.1.0)
+    rack (1.1.2)
+    rake (0.9.2)
+    rcov (0.9.9)
+    shoulda (2.11.3)
+    state_machine (1.0.1)
+    test-unit (2.3.0)
+    watchr (0.7)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  actionpack (~> 2.3.10)
+  builder
+  bundler (~> 1.0.0)
+  infinity_test
+  jeweler (~> 1.6.4)
+  mocha
+  rcov
+  shoulda
+  state_machine
+  test-unit

LICENSE.txt

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+Copyright (c) 2011 Henry Hsu
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+Call Center
+===========
+
+Support for defining call center workflows.
+
+Overview
+--------
+Call Center streamlines the process of defining multi-party call workflows in your application. Particularly, with [Twilio](http://www.twilio.com/docs) in mind.
+
+[Twilio](http://www.twilio.com/docs) provides a two-part API for managing phone calls, and is mostly driven by callbacks. Call Center DRYs up the application logic dealing with a callback driven API so you can focus on the business logic of your call center.
+
+### Not DRY
+Twilio requests your application to return [TwiML](http://www.twilio.com/docs/api/twiml/) that describes the call workflow. TwiML contains commands which Twilio then executes. It is essentially an application-to-application API, synonymous to making a REST call.
+
+In the context of "[Skinny Controller, Fat Model](http://weblog.jamisbuck.org/2006/10/18/skinny-controller-fat-model)", outgoing REST calls for the function of business logic are not a view concern but a model concern. Therefore, so is TwiML.
+
+Twilio supports callbacks URLs and redirects to URLs that also render TwiML as a method of modifying live calls. Incoming callbacks are handled by the controller first, but the response is still a model concern.
+
+Terminology
+-----------
+
+* **Call** - An application resource of yours that encapsulates a phone call. Phone calls are then acted on: answered, transferred, declined, etc.
+* **Event** - Is something that happens outside or inside your application in relation to a **Call**. Someone picks up, hangs up, presses a button, etc.
+* **State** - Is the status a **Call** is in which is descriptive of what's happened so far and what are the next things that should happen. (e.g. a call on hold is waiting for the agent to return)
+* **CallFlow** - Is a definition of the process a **Call** goes through. **Events** drive the flow between **States**. (e.g. a simple workflow is when noone answers the call, send the call to voicemail)
+* **Render** - Is the ability of the **CallFlow** to return TwiML to bring the call into the **State** or modify the live call through a **Redirect**.
+* **Redirect** - Is a way of modifying a live call outside of a TwiML response (e.g. background jobs)
+
+Usage
+-----
+
+    class Call
+      include CallCenter
+
+      call_flow :state, :intial => :answered do
+        state :answered do
+          event :incoming_call, :to => :voicemail, :if => :not_during_business_hours?
+          event :incoming_call, :to => :sales
+        end
+
+        state :voicemail do
+          event :customer_hangs_up, :to => :voicemail_completed
+        end
+
+        on_render(:sales) do |call, x|
+          x.Say "This is Sales!"
+        end
+
+        on_render(:voicemail) do |call, x|
+          x.Say "Leave a voicemail!"
+        end
+      end
+    end
+
+Flow
+----
+
+The general application flow for a **CallFlow** is like this:
+
+1. An incoming call is posted to your application
+   * You create a **Call**
+   * You execute an initial event
+   * You respond by rendering TwiML. Your TwiML contains callbacks to events or redirects
+2. Something happens and Twilio posts an event to your application
+   * You find the **Call**
+   * You store any new information
+   * You execute the posted event
+   * You respond by rendering TwiML. Your TwiML contains callbacks to events or redirects
+3. Repeat 2.
+
+Rendering
+---------
+
+Rendering is your way of interacting with Twilio. Thus, it provides two facilities: access to an XML builder and access to your call.
+
+    on_render(:sales) do |the_call, xml_builder|
+      xml_builder.Say "This is Sales!"
+      
+      the_call.flag! # You can access the call explicitly
+      flag!          # Or access it implicitly
+    end
+
+Renders:
+
+    <?xml version="1.0" encoding="UTF-8"?>
+    <Response>
+      <Say>This is Sales!</Say>
+    </Response>
+
+Redirects
+---------
+
+Redirects are a request made to the [Twilio REST API](http://www.twilio.com/docs/api/rest/) that points to a callback URL which returns TwiML to be executed on a call. It is up to you how you want to perform this (e.g. with your favority http libraries, or with [Twilio Libraries](http://www.twilio.com/docs/libraries/)).
+
+Redirect to events look like this:
+
+    ...
+    call_flow :state, :intial => :answered do
+      state :answered do
+        ...
+      end
+
+      state :ending_call do
+        event :end_call, :to => :ended_call
+      end
+
+      on_render(:ending_call) do
+        redirect_and_end_call!(:status => 'completed')
+      end
+    end
+    ...
+
+For your **Call** to support this syntax, it must adhere to the following API:
+
+    class Call
+      def redirect_to(event, *args)
+        # where:
+        #   event #=> :end_call
+        #   args  #=> [:status => 'completed]
+        @account.calls.get(self.sid).update({:url => "http://myapp.com/call_flow?event=#{event}"})
+      end
+    end
+
+Tools
+-----
+
+### Drawing ###
+
+Benefits of **CallCenter** is that it's backed by [state_machine](https://github.com/pluginaweek/state_machine). Should you be interested in what your call center workflow looks like, you can draw.
+
+    Call.state_machines[:status].draw(:font => 'Helvetica Neue')
+    # OR
+    @call.draw_call_flow(:font => 'Helvetica Neue')

Rakefile

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+# encoding: utf-8
+
+require 'rubygems'
+require 'bundler'
+begin
+  Bundler.setup(:default, :development)
+rescue Bundler::BundlerError => e
+  $stderr.puts e.message
+  $stderr.puts "Run `bundle install` to install missing gems"
+  exit e.status_code
+end
+require 'rake'
+
+require 'jeweler'
+Jeweler::Tasks.new do |gem|
+  # gem is a Gem::Specification... see http://docs.rubygems.org/read/chapter/20 for more options
+  gem.name = "call_center"
+  gem.homepage = "http://github.com/zendesk/call_center"
+  gem.license = "MIT"
+  gem.summary = %Q{Support for describing call center workflows}
+  gem.description = %Q{Support for describing call center workflows}
+  gem.email = "hhsu@zendesk.com"
+  gem.authors = ["Henry Hsu"]
+  # dependencies defined in Gemfile
+end
+Jeweler::RubygemsDotOrgTasks.new
+
+require 'rake/testtask'
+Rake::TestTask.new(:test) do |test|
+  test.libs << 'lib' << 'test'
+  test.pattern = 'test/**/test_*.rb'
+  test.verbose = true
+end
+
+require 'rcov/rcovtask'
+Rcov::RcovTask.new do |test|
+  test.libs << 'test'
+  test.pattern = 'test/**/*_test.rb'
+  test.verbose = true
+  test.rcov_opts << '--exclude "gems/*"'
+end
+
+task :default => :test
+
+require 'rake/rdoctask'
+Rake::RDocTask.new do |rdoc|
+  version = File.exist?('VERSION') ? File.read('VERSION') : ""
+
+  rdoc.rdoc_dir = 'rdoc'
+  rdoc.title = "twilio_flow #{version}"
+  rdoc.rdoc_files.include('README*')
+  rdoc.rdoc_files.include('lib/**/*.rb')
+end

VERSION

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+0.0.1

call_center.gemspec

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+# Generated by jeweler
+# DO NOT EDIT THIS FILE DIRECTLY
+# Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
+# -*- encoding: utf-8 -*-
+
+Gem::Specification.new do |s|
+  s.name = %q{call_center}
+  s.version = "0.0.1"
+
+  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
+  s.authors = ["Henry Hsu"]
+  s.date = %q{2011-07-22}
+  s.description = %q{Support for describing call center workflows}
+  s.email = %q{hhsu@zendesk.com}
+  s.extra_rdoc_files = [
+    "LICENSE.txt",
+    "README.md"
+  ]
+  s.homepage = %q{http://github.com/zendesk/call_center}
+  s.licenses = ["MIT"]
+  s.require_paths = ["lib"]
+  s.rubygems_version = %q{1.5.3}
+  s.summary = %q{Support for describing call center workflows}
+
+  if s.respond_to? :specification_version then
+    s.specification_version = 3
+
+    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
+      s.add_runtime_dependency(%q<builder>, [">= 0"])
+      s.add_runtime_dependency(%q<state_machine>, [">= 0"])
+      s.add_development_dependency(%q<shoulda>, [">= 0"])
+      s.add_development_dependency(%q<bundler>, ["~> 1.0.0"])
+      s.add_development_dependency(%q<jeweler>, ["~> 1.6.4"])
+      s.add_development_dependency(%q<rcov>, [">= 0"])
+      s.add_development_dependency(%q<test-unit>, [">= 0"])
+      s.add_development_dependency(%q<infinity_test>, [">= 0"])
+      s.add_development_dependency(%q<actionpack>, ["~> 2.3.10"])
+      s.add_development_dependency(%q<mocha>, [">= 0"])
+    else
+      s.add_dependency(%q<builder>, [">= 0"])
+      s.add_dependency(%q<state_machine>, [">= 0"])
+      s.add_dependency(%q<shoulda>, [">= 0"])
+      s.add_dependency(%q<bundler>, ["~> 1.0.0"])
+      s.add_dependency(%q<jeweler>, ["~> 1.6.4"])
+      s.add_dependency(%q<rcov>, [">= 0"])
+      s.add_dependency(%q<test-unit>, [">= 0"])
+      s.add_dependency(%q<infinity_test>, [">= 0"])
+      s.add_dependency(%q<actionpack>, ["~> 2.3.10"])
+      s.add_dependency(%q<mocha>, [">= 0"])
+    end
+  else
+    s.add_dependency(%q<builder>, [">= 0"])
+    s.add_dependency(%q<state_machine>, [">= 0"])
+    s.add_dependency(%q<shoulda>, [">= 0"])
+    s.add_dependency(%q<bundler>, ["~> 1.0.0"])
+    s.add_dependency(%q<jeweler>, ["~> 1.6.4"])
+    s.add_dependency(%q<rcov>, [">= 0"])
+    s.add_dependency(%q<test-unit>, [">= 0"])
+    s.add_dependency(%q<infinity_test>, [">= 0"])
+    s.add_dependency(%q<actionpack>, ["~> 2.3.10"])
+    s.add_dependency(%q<mocha>, [">= 0"])
+  end
+end
+