Handle errors using Gaffe

Gemfile

@@ -46,6 +46,7 @@ gem 'recurring_select'
 gem 'roo', '~> 2.0.0'
 gem 'roo-xls'
 gem 'spreadsheet'
+gem 'gaffe'
 
 # we use the git version of acts_as_versioned, and need to include it in this Gemfile
 gem 'acts_as_versioned', github: 'technoweenie/acts_as_versioned'

Gemfile.lock

@@ -153,6 +153,8 @@ GEM
     faker (1.4.3)
       i18n (~> 0.5)
     ffi (1.9.10)
+    gaffe (1.0.2)
+      rails (>= 3.2.0)
     git-version-bump (0.15.1)
     globalid (0.3.5)
       activesupport (>= 4.1.0)
@@ -488,6 +490,7 @@ DEPENDENCIES
   faker
   foodsoft_messages!
   foodsoft_wiki!
+  gaffe
   haml-rails
   i18n-js (~> 3.0.0.rc8)
   i18n-spec

app/assets/stylesheets/bootstrap_and_overrides.css.less

@@ -160,6 +160,15 @@ table {
   }
 }
 
+// Error page
+.large-error-icon {
+  float: left;
+  text-align: right;
+  font-size: 160px;
+  color: lightgrey;
+  margin-left: 25px;
+}
+
 // Tasks ..
 .accepted {
   color: #468847;

app/controllers/errors_controller.rb

@@ -0,0 +1,24 @@
+class ErrorsController < ApplicationController
+  include Gaffe::Errors
+
+  skip_before_filter :authenticate
+
+  layout :current_layout
+
+  def show
+    render "errors/#{@rescue_response}", status: @status_code
+  end
+
+  private
+
+  def current_layout
+    # Need foodcoop for `current_user`, even though it may not be retrieved from the url.
+    params[:foodcoop] ||= session[:scope]
+    current_user ? 'application' : 'login'
+  end
+
+  def login_layout?
+    current_user.nil?
+  end
+  helper_method :login_layout?
+end

app/views/errors/_error.html.haml

@@ -0,0 +1,9 @@
+- title local_assigns[:title], false
+
+- unless login_layout?
+  %i.hidden-phone.large-error-icon.icon-exclamation-sign
+%div(class="#{login_layout? ? '' : 'span6'}")
+  %h1= local_assigns[:title]
+  %div(class='alert alert-#{local_assigns[:type] || 'warn'}')
+    = local_assigns[:page]
+  = link_to t('ui.back'), 'javascript:history.go(-1)', class: 'btn btn-primary'

app/views/errors/internal_server_error.html.haml

@@ -0,0 +1,5 @@
+- page = capture do
+  %p= t '.text1'
+  %p= t '.text2'
+
+= render 'error', title: t('.title'), type: :error, page: page

app/views/errors/not_found.html.haml

@@ -0,0 +1,4 @@
+- page = capture do
+  %p= t '.text'
+
+= render 'error', title: t('.title'), page: page

app/views/finance/invoices/new.html.haml

@@ -1,3 +1,3 @@
 - title t('.title')
 = render :partial => 'form'
-= link_to t('.back'), finance_invoices_path
+= link_to t('ui.or_cancel'), finance_invoices_path

app/views/finance/invoices/show.html.haml

@@ -36,5 +36,4 @@
   =h @invoice.note
 
 = link_to t('ui.edit'), edit_finance_invoice_path(@invoice)
-|
-= link_to t('.back'), finance_invoices_path
+= link_to t('ui.or_cancel'), finance_invoices_path

config/initializers/gaffe.rb

@@ -0,0 +1,6 @@
+if Rails.env.production? || Rails.env.staging? || true
+  Gaffe.configure do |config|
+    config.errors_controller = 'ErrorsController'
+  end
+  Gaffe.enable!
+end

config/locales/en.yml

@@ -638,6 +638,13 @@ en:
     general: A problem has occured.
     general_again: A problem has occured. Please try again.
     general_msg: 'A problem has occured: %{msg}'
+    not_found:
+      title: Page not found
+      text: This page does not appear to exist, sorry!
+    internal_server_error:
+      title: Internal server error
+      text1: An unexpected error has occured. Sorry!
+      text2: We've been notified. If this remains a problem, please tell us so.
   feedback:
     create:
       notice: Your feedback was sent successfully. Thanks a lot!
@@ -771,10 +778,8 @@ en:
       linked_delivery: a delivery
       linked_order: an order
       new:
-        back: Back
         title: Create new invoice
       show:
-        back: Back
         title: Invoice %{number}
     ordergroups:
       index:
@@ -1685,6 +1690,7 @@ en:
       title_all: All group tasks
   ui:
     actions: Actions
+    back: Back
     cancel: Cancel
     close: Close
     copy: Copy