Class: RailsI18nOnair::LiveUi::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_i18n_onair/live_ui/middleware.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/rails_i18n_onair/live_ui/middleware.rb', line 4

def initialize(app)
  @app = app
  @mount_path    = nil
  @cached_script = nil
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rails_i18n_onair/live_ui/middleware.rb', line 10

def call(env)
  # Fast exit: skip all work when Live UI is off
  return @app.call(env) unless RailsI18nOnair.configuration.live_ui?

  translator = translator_signed_in?(env)

  # Determine if this request should get Live UI treatment.
  # Set the flag via CurrentAttributes BEFORE the app renders —
  # the t() helper reads Current.live_ui_active during view rendering.
  active = env["REQUEST_METHOD"] == "GET" &&
           !engine_request?(env) &&
           translator

  RailsI18nOnair::Current.live_ui_active = active

  status, headers, response = @app.call(env)

  if translator && status == 200 && html_response?(headers) && rewritable_response?(headers)
    body = collect_body(response)
    response.close if response.respond_to?(:close)
    # Replace ⟦i18n:key:locale⟧text⟦/i18n⟧ markers from controller t()
    # calls (flash messages, etc.) with editable <span> wrappers.
    body = replace_i18n_markers(body)
    # Remove wrappers that ended up where markup cannot live —
    # attribute values (placeholder:, title:, …), <title>, <textarea>.
    body = unwrap_misplaced_spans(body)
    body = inject_live_ui(body) if active
    headers["Content-Length"] = body.bytesize.to_s
    [status, headers, [body]]
  else
    [status, headers, response]
  end
end