fixing 303 url_formatter

episode-303/url_formatter/.gitignore

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+*.gem
+.bundle
+Gemfile.lock
+pkg/*

episode-303/url_formatter/.rspec

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+--color

episode-303/url_formatter/.travis.yml

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+rvm:
+  - 1.9.2

episode-303/url_formatter/CHANGELOG.md

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+## v0.0.1
+
+* initial release

episode-303/url_formatter/Gemfile

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+source "http://rubygems.org"
+
+# Specify your gem's dependencies in url_formatter.gemspec
+gemspec

episode-303/url_formatter/LICENSE

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+Copyright (c) 2011 Ryan Bates
+
+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.

episode-303/url_formatter/README.md

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+# URL Formatter [![Build Status](https://secure.travis-ci.org/ryanb/url_formatter.png)](http://travis-ci.org/ryanb/url_formatter)
+
+Format and validate a URL attribute in Active Record. This is an example gem created for [RailsCasts episode #301](http://railscasts.com/episodes/301-extracting-a-ruby-gem).
+
+
+## Installation
+
+Add to your Gemfile and run the `bundle` command to install it.
+
+```ruby
+gem "url_formatter"
+```
+
+**Requires Ruby 1.9.2 or later.**
+
+
+## Usage
+
+Call [format_url](http://rubydoc.info/github/ryanb/url_formatter/master/UrlFormatter/ModelAdditions:format_url) in an ActiveRecord class and pass the name of the attribute you wish to format into a URL and validate.
+
+```ruby
+class Comment < ActiveRecord::Base
+  format_url :website
+end
+```
+
+This will automatically add "http://" to the beginning of the `website` attribute upon saving if no protocol is present. It will also do validation to ensure it looks like a URL.
+
+
+## Development
+
+Questions or problems? Please post them on the [issue tracker](https://github.com/ryanb/url_formatter/issues). You can contribute changes by forking the project and submitting a pull request. You can ensure the tests passing by running `bundle` and `rake`.
+
+This gem is created by Ryan Bates and is under the MIT License.

episode-303/url_formatter/Rakefile

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+require "bundler/gem_tasks"
+require 'rspec/core/rake_task'
+
+RSpec::Core::RakeTask.new(:spec)
+
+task default: :spec

episode-303/url_formatter/lib/url_formatter.rb

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+require "url_formatter/version"
+require "url_formatter/model_additions"
+require "url_formatter/railtie" if defined? Rails
+
+module UrlFormatter
+  def self.format_url(url)
+    if url.to_s !~ url_regexp && "http://#{url}" =~ url_regexp
+      "http://#{url}"
+    else
+      url
+    end
+  end
+
+  def self.url_regexp
+    /^https?:\/\/([^\s:@]+:[^\s:@]*@)?[-[[:alnum:]]]+(\.[-[[:alnum:]]]+)+\.?(:\d{1,5})?([\/?]\S*)?$/iux
+  end
+end

episode-303/url_formatter/lib/url_formatter/model_additions.rb

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+module UrlFormatter
+  module ModelAdditions
+    # To format and validate a URL attribute, call <tt>format_url</tt>
+    # in any Active Record model class and pass it the name of an attribute.
+    #
+    #   class User < ActiveRecord::Base
+    #     format_url :website
+    #   end
+    #
+    # This will add a <tt>before_validation</tt> callback to add "http://" to
+    # the attribute if a protocol doesn't exist already. It then validates the
+    # format of the URL.
+    def format_url(attribute)
+      before_validation do
+        send("#{attribute}=", UrlFormatter.format_url(send(attribute)))
+      end
+      validates_format_of attribute, with: UrlFormatter.url_regexp, message: "is not a valid URL"
+    end
+  end
+end

episode-303/url_formatter/lib/url_formatter/railtie.rb

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+module UrlFormatter
+  class Railtie < Rails::Railtie
+    initializer 'url_formatter.model_additions' do
+      ActiveSupport.on_load :active_record do
+        extend ModelAdditions
+      end
+    end
+  end
+end

episode-303/url_formatter/lib/url_formatter/version.rb

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+module UrlFormatter
+  VERSION = "0.0.2.alpha"
+end

episode-303/url_formatter/spec/spec_helper.rb

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+require 'url_formatter'
+require 'supermodel'

episode-303/url_formatter/spec/url_formatter/model_additions_spec.rb

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+require 'spec_helper'
+
+class Comment < SuperModel::Base
+  include ActiveModel::Validations::Callbacks
+  extend UrlFormatter::ModelAdditions
+  format_url :website
+end
+
+describe UrlFormatter::ModelAdditions do
+  it "adds http:// to URL upon saving" do
+    Comment.create!(website: "example.com").website.should eq("http://example.com")
+    Comment.create!(website: "http://example.com").website.should eq("http://example.com")
+  end
+
+  it "validates URL format" do
+    comment = Comment.new(website: "foo bar")
+    comment.should_not be_valid
+    comment.errors[:website].should eq(["is not a valid URL"])
+    comment.website = "example.com"
+    comment.should be_valid
+  end
+end

episode-303/url_formatter/spec/url_formatter_spec.rb

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+# encoding: utf-8
+require 'spec_helper'
+
+describe UrlFormatter do
+  describe ".format_url" do
+    it "adds http:// to a URL if not provided" do
+      UrlFormatter.format_url("example.com").should eq("http://example.com")
+    end
+
+    it "does not add http:// to a URL if already provided" do
+      UrlFormatter.format_url("http://example.com").should eq("http://example.com")
+    end
+
+    it "returns an invalid URL unchanged" do
+      UrlFormatter.format_url("foo bar").should eq("foo bar")
+      UrlFormatter.format_url(nil).should eq(nil)
+    end
+  end
+
+  describe ".url_regexp" do
+    it "matches valid URLs" do
+      [
+        'http://example.com/',
+        'HTTP://E-XAMLE.COM',
+        'https://example.co.uk./foo',
+        'http://example.com:8080',
+        'http://www.example.com/anything/after?slash',
+        'http://www.example.com?anything_after=question',
+        'http://user123:sEcr3t@example.com',
+        'http://user123:@example.com',
+        'http://example.com/~user',
+        'http://1.2.3.4:8080',
+        'http://ütf8.com',
+      ].each do |url|
+        url.should match(UrlFormatter.url_regexp)
+      end
+    end
+
+    it "does not match invalid URLs" do
+      [
+        "www.example.com",
+        "http://",
+        "http://example..com",
+        "http://e xample.com",
+        "http://example.com/foo bar",
+        "http://example", # technically valid but not what we want from user
+        "other://example.com", # we also don't want other protocols
+      ].each do |url|
+        url.should_not match(UrlFormatter.url_regexp)
+      end
+    end
+  end
+end

episode-303/url_formatter/url_formatter.gemspec

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+# -*- encoding: utf-8 -*-
+$:.push File.expand_path("../lib", __FILE__)
+require "url_formatter/version"
+
+Gem::Specification.new do |s|
+  s.name        = "url_formatter"
+  s.version     = UrlFormatter::VERSION
+  s.authors     = ["Ryan Bates"]
+  s.email       = ["ryan@railscasts.com"]
+  s.homepage    = "https://github.com/ryanb/url_formatter"
+  s.summary     = %q{Format and validate a URL in Active Record}
+  s.description = %q{Example of creating a Ruby Gem for RailsCasts episode #301}
+
+  s.rubyforge_project = "url_formatter"
+
+  s.files         = `git ls-files`.split("\n")
+  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+  s.require_paths = ["lib"]
+
+  s.add_development_dependency "rake"
+  s.add_development_dependency "rspec"
+  s.add_development_dependency "supermodel"
+end