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Dead simple Rails localization.

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= Gibberish

Yet another localization library.  Maybe with the most agreeable API?

= Usage

It's simple.  Your default language, by default, is English (:en).

  >> "Hey there!"[:hey]
  => "Hey there!"

Gibberish looks in RAILS_ROOT/lang/*.yml for translation files.  Say you have RAILS_ROOT/lang/es.yml, 
right?  Gibberish will detect that you know about the :es language and will serve up translations
defined in that file if requested to do so.

Here's a real simple example file (it's just "key: translation"):

  $ cat lang/es.yml
  hey: ¡Hey allí!

And, as follows, a real simple example session:

  >> "Hey there!"[:hey]
  => "Hey there!"
  >> Gibberish.current_language
  => :en
  >> Gibberish.current_language = :es
  => :es
  >> "Hey there!"[:hey]
  => "¡Hey allí!"
  >> Gibberish.current_language = nil
  => nil
  >> "Hey there!"[:hey]
  => "Hey there!"

It even works with simple interpolation:

  >> "Hey, {name}!"[:hey_name, 'Chris']   
  => "Hey, Chris!"
  >> "{name} is from {place}"[:hey_place, 'Chris', 'the Dreamworld']
  => "Chris is from the Dreamworld"

Notice we don't use hashes (#) like normal Ruby interpolation.  Also, the names of the variables
in the brackets don't really mean much.  Interpolation is done in order -- the first argument replaces
the first variable in brackets, the second the second, etc.

Interpolation can also be done via hash:

  >> "{name} is from {place}"[:hey_place, { :place => 'Gotham City', :name => 'Batman' }]
  => "Batman is from Gotham City"

This of course works with your translations:

  $ cat lang/es.yml
  hey: ¡Hey allí!
  hey_name: ¡Hola {name}!

  >> "Hey, {name}!"[:hey_name, 'Chris']   
  => "Hey, Chris!"
  >> Gibberish.current_language = :es
  => :es
  >> "Hey, {name}!"[:hey_name, 'Cristóbal']   
  => ¡Hola Cristóbal!

Neat.  What other methods do we get?

The classic around_filter:

  class ApplicationController < ActionController::Base
    around_filter :set_language

  private
    def set_language
      Gibberish.use_language(session[:language]) { yield }
    end
  end

For the duration of the block, :es is set as the language of choice.  After the block is run everything
returns to normal.  Rad.

Finally, some checking methods, if you need them:

  >> Gibberish.default_language?
  => true
  >> Gibberish.current_language = :es
  => :es
  >> Gibberish.current_language 
  => :es
  >> Gibberish.default_language?
  => false

Languages are loaded by default at Rails startup.  In dev mode, language YAML files are reloaded when
modified.  No need to reboot the server.

  >> Gibberish.load_languages!
  => [:es, :fr, :de, :kl]
  >> Gibberish.languages
  => [:es, :fr, :de, :kl]

More as it's needed.

= Warning

By default, Ruby returns nil when a symbol is passed to String's [] method.  Some of Rails, it seems, depends
on this behavior.  Yes, I am changing !!core Ruby behavior!!  The humanity!

To deal with this assumption, Gibberish has a reserved_keys array.  It, by default, contains :limit (so Rails
migrations don't explode on you.)  To add to this array, just pass it more keys:

  >> Gibberish.add_reserved_key :another_key
  => [:limit, :another_key]
  >> Gibberish.add_reserved_keys :more, :keys
  => [:limit, :another_key, :more, :keys]

You've been warned.  It really shouldn't affect you, though.

>> Chris Wanstrath
=> chris[at]ozmm[dot]org
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