Class: Togl::Rack::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/togl/rack/middleware.rb

Constant Summary collapse

SESSION_KEY = 
'togl.features'

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/togl/rack/middleware.rb', line 6

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/togl/rack/middleware.rb', line 10

def call(env)
  Thread.current[:togl_session_features] = detect_feature_params(env)
  @app.call(env).tap do
    Thread.current[:togl_session_features] = nil
  end
end

#detect_feature_params(env) ⇒ Object 



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# File 'lib/togl/rack/middleware.rb', line 17

def detect_feature_params(env)
  params = ::Rack::Utils.parse_query(env["QUERY_STRING"])
  session = env["rack.session"]
  session[SESSION_KEY] ||= {}
  { ["enable_feature", "enable_features"]   => true,
    ["disable_feature", "disable_features"] => false,
    ["reset_feature", "reset_features"]     => nil }.each do |keys, flag|
    keys.each do |key|
      feature_names(params, key).each do |feature|
        session[SESSION_KEY][feature] = flag
      end
    end
  end
  session[SESSION_KEY]
end

#feature_names(params, key) ⇒ Object 



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# File 'lib/togl/rack/middleware.rb', line 33

def feature_names(params, key)
  params.fetch(key, "").split(",").map(&:strip)
end