Implement error page for S3 connection failure

hyrax/app/controllers/application_controller.rb

 class ApplicationController < ActionController::Base
+  rescue_from Seahorse::Client::NetworkingError, with: :handle_s3_networking_error
   helper Openseadragon::OpenseadragonHelper
   # Adds a few additional behaviors into the application controller
   include Blacklight::Controller
@@ -10,4 +11,14 @@ class ApplicationController < ActionController::Base
   include Hyrax::ThemedLayoutController
   with_themed_layout '1_column'
 
+  private
+
+  def handle_s3_networking_error(exception)
+    respond_to do |format|
+      format.html do
+        render 'errors/error_message', locals: { heading: "Connectivity Issue", description: t('hyrax.uploads.js_templates.options.messages.s3_server_error') }, status: :internal_server_error
+      end
+      format.json { render plain: 's3_server_error', status: 500 }
+    end
+  end
 end

hyrax/app/views/errors/error_message.html.erb

+<%
+  heading = local_assigns[:heading] || t("rdms.errors.#{params[:action]}.heading")
+  description = local_assigns[:description] || t("rdms.errors.#{params[:action]}.description")
+%>
 <div class="rails-default-error-page">
   <div class="dialog">
     <div class="dialog-heading">
-      <h1 class="heading-title"><%= t("rdms.errors.#{params[:action]}.heading")%></h1>
-      <p class="heading-body"><%= t("rdms.errors.#{params[:action]}.description")%></p>
+      <h1 class="heading-title"><%= heading %></h1>
+      <p class="heading-body"><%= description %></p>
     </div>
     <p class="dialog-body"><%= t("rdms.errors.suggestion")%></p>
   </div>

hyrax/app/views/hyrax/uploads/_js_templates.html.erb

@@ -151,12 +151,19 @@
                 maxFileSize: '<%= t(".options.messages.max_file_size") %>',
                 maxNumberOfFiles: '<%= t(".options.messages.max_number_of_files") %>',
                 minFileSize: '<%= t(".options.messages.min_file_size") %>',
+                s3ServerError: '<%= t("rdms.errors.uploads.s3_server_error") %>',
+                fileNotAllowed: '<%= t("rdms.errors.uploads.file_not_allowed") %>'
             }});
     }).on('fileuploadfail', function (e, data) {
         file = data.files[0]
         dfd = $.Deferred();
         data.files.error = true;
-        file.error = '<%= t("rdms.errors.uploads.file_not_allowed") %>'
+        if (data.response().jqXHR.responseText == 's3_server_error') {
+            file.error = data.messages.s3ServerError
+        }
+        else{
+            file.error = data.messages.fileNotAllowed
+        }
         dfd.rejectWith(this, [data]);
         $('#with_files_submit').attr('disabled', 'disabled')
         return dfd.promise();

hyrax/config/locales/en.yml

@@ -97,6 +97,7 @@ en:
           length: "The modality title should be between 3-63 characters long. Consider using leading zeros (e.g. 003 instead of 3)"
       uploads:
         file_not_allowed: "This file name is restricted. Delete this file and upload again after changing the name"
+        s3_server_error: "Apologies for the inconvenience. At the moment, this feature is not accessible. This is due to an issue with the connectivity to our research data storage. Our team is diligently working on resolving this. Please try again later. Thank you for your understanding and patience."
   simple_form:
     hints:
       defaults: