Add Redis repository

README.md

@@ -24,10 +24,15 @@ First, you need to configure where to store everything by setting a repository.
 
 Available repositories are :
 - `Flop::Repository::Memory`
+- `Flop::Repository::Redis`
 
 To set the repository, create a new object and affect it to `Flop.repo`.
 ```ruby
 Flop.repo = Flop::Repository::Memory.new
+
+require 'redis'
+
+Flop.repo = Flop::Repository::Redis.new(Redis.new)
 ```
 
 ### Features

lib/flop.rb

@@ -2,6 +2,7 @@ require 'flop/version'
 
 require 'flop/feature'
 require 'flop/repository/memory'
+require 'flop/repository/redis'
 
 module Flop
   class << self

lib/flop/feature.rb

@@ -17,6 +17,7 @@ module Flop
 
     def set(value)
       repo.set(name, value)
+      value
     end
 
     def activate

lib/flop/repository/redis.rb

@@ -0,0 +1,24 @@
+module Flop
+  module Repository
+    class Redis
+      def initialize(redis, namespace = '')
+        @redis = redis
+        @namespace = namespace
+      end
+
+      def get(name)
+        @redis.get(key(name)).to_i == 1
+      end
+
+      def set(name, value)
+        @redis.set(key(name), value ? 1 : 0)
+      end
+
+      private
+
+      def key(name)
+        [@namespace, name].join(':')
+      end
+    end
+  end
+end