Class: Useless::Doc::Rack::Transform

Inherits:
Object
  • Object
show all
Defined in:
lib/useless/doc/rack/transform.rb

Overview

Doc::Rack::Transform takes the a JSON response and attempts to parse it via Doc::Serialization::Load and render it as HTML via the UI specified by env.

If the JSON cannot be parsed, the response will be a 502.

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Transform 



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# File 'lib/useless/doc/rack/transform.rb', line 14

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/useless/doc/rack/transform.rb', line 18

def call(env)
  unless env['useless.doc.ui']
    raise 'No UI specified.'
  end

  response = @app.call(env)

  if response[0] == 200
    begin
      resource = Serialization::Load.resource(response[2].first)
      html = env['useless.doc.ui'].html(resource)
      [200, {'Content-Type' => 'text/html'}, [html]]
    rescue Oj::ParseError
      [502, {'Content-Type' => 'text/plain'}, ['Documentation JSON is malformed.']]
    end
  else
    response
  end
end