Class: I18n::Instrument::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/i18n/instrument/middleware.rb

Constant Summary collapse

STORE_KEY =

used to store request information in the request store

:i18n_instrumentation
JS_RESPONSE =

canned response sent to js instrumentation requests

[
  200, {
    'Content-Type' => 'application/json',
    'Content-Length' => 2
  }, [
    '{}'
  ]
]

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/i18n/instrument/middleware.rb', line 20

def initialize(app)
  @app = app

  # this will fire on every call to I18n.t
  I18n::Debug.on_lookup do |key, value|
    next unless enabled?
    config.on_lookup.call(key, value)

    begin
      # find the first application-specific line in the stack trace
      raw_trace = filter_stack_trace(::Kernel.caller)
      trace = raw_trace.split(":in `").first if raw_trace

      # grab path params (set in `call` method below)
      url = store.fetch(STORE_KEY, {}).fetch(:url, nil)

      if url.present? && trace.present?
        record_translation_lookup(
          url: url, trace: trace, key: key,
          locale: I18n.locale.to_s, source: 'ruby'
        )
      end
    rescue => e
      config.on_error.call(e)
    end
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/i18n/instrument/middleware.rb', line 48

def call(env)
  if i18n_js_request?(env)
    handle_i18n_js_request(env)
  else
    handle_regular_request(env)
  end
rescue => e
  config.on_error.call(e)
  @app.call(env)
end