Spaced

Spaced is a super simple and convenient way to isolate and namespace a collection of related methods into any class.

Usage

class User
  include Spaced

  # Pass a block with a bunch of methods.
  namespace :twitter do
    def create(msg)
      api.create_tweet msg
    end

    def read(id)
      api.read_tweet id
    end

    private

      def api
        @api ||= TwitterClient.new(api_token: parent.api_token)
      end
  end

  # Or pass a predefined class, which should subclass `Spaced::Base`.
  namespace :facebook, Facebook::Api
end

user = User.new
id = user.twitter.create("Spaced man!")
user.twitter.read(id)

In the example above, namespace creates and initializes a new class Twitter and returns it from the #twitter method. The parent class - in this case User - is available at #parent and @parent from within the namespace.

Magic bang and predicate methods

If you define a #_! or #call method in your namespaced class, you can then conveniently call that with a bang method:

class User
  include Spaced

  namespace :tweet do
    def _!(content)
      create_tweet content
    end
  end
end

user = User.new
user.tweet!('my new tweet') # Will call the `#_!` method with whatever arguments you give it.

There is also an equivalent predicate method:

namespace :tweet do
  def _?
    false
  end
end
user = User.new
user.tweet? # Will call the `#predicate` method.

Both bang and predicate methods can be defined using identically named methods:

namespace :tweet do
  def tweet?
    false
  end

  def tweet!
    # ...
  end
end
user = User.new
user.tweet? # Will call the `#tweet?` method on `:tweet` namespace.
user.tweet! # Will call the `#tweet!` method on `:tweet` namespace.

Installation

Add this line to your application's Gemfile:

gem 'spaced'

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/joelmoss/spaced. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Spaced project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.