Nobn-js destroy action for support letter attachments

app/controllers/form/support_letter_attachments_controller.rb

@@ -0,0 +1,29 @@
+class Form::SupportLetterAttachmentsController < Form::BaseController
+  include FormAnswerSubmissionMixin
+  before_action :set_support_letter
+
+  def show; end
+
+  def destroy
+    attachment = SupportLetterAttachment.find(params[:id])
+    form_answer = attachment.form_answer
+
+    if attachment.destroy
+      updated_list = form_answer.document['supporter_letters_list'].reject { |letter| letter['letter_of_support'] == attachment.id }
+      form_answer.update(document: form_answer.document.merge(supporter_letters_list: updated_list))
+
+      flash[:notice] = 'Attachment successfully deleted.'
+    else
+      flash[:alert] = 'Failed to delete attachment.'
+    end
+
+    redirect_to form_form_answer_supporters_path(form_answer)
+  end
+
+  private
+
+  def set_support_letter
+    @support_letter = SupportLetter.find(params[:support_letter_id])
+    @form_answer = @support_letter.form_answer
+  end
+end

app/views/form/support_letter_attachments/show.html.slim

@@ -0,0 +1,20 @@
+- content_for :page_title, "Support Letter Attachment"
+
+.govuk-grid-row
+  .govuk-grid-column-two-thirds
+    h1.govuk-heading-xl Support Letter Attachment
+
+    - if @support_letter.support_letter_attachment.present?
+      .govuk-summary-list
+        .govuk-summary-list__row
+          dt.govuk-summary-list__key
+            | File Name
+          dd.govuk-summary-list__value
+            = @support_letter.support_letter_attachment.original_filename
+
+      = button_to "Delete Attachment", 
+                  form_form_answer_support_letter_support_letter_attachment_path(@form_answer, @support_letter, @support_letter.support_letter_attachment), 
+                  method: :delete, 
+                  class: "govuk-button govuk-button--warning"
+    - else
+      p.govuk-body No attachment found for this support letter.

app/views/form/support_letters/_form.html.slim

@@ -33,14 +33,16 @@
         = "Upload the #{first_or_second} letter of support"
       span.question-context.question-debug.govuk-hint
         ' If you upload the wrong file, click the 'Remove' link next to the file name to delete it. The file upload button will reappear, allowing you to select the correct file.
+
       = ff.simple_fields_for :support_letter_attachment, (ff.object.support_letter_attachment || ff.object.build_support_letter_attachment)  do |fff|
         = fff.input :attachment, as: :file, label: false, input_html: { class: "form-control" }, wrapper_html: { style: "margin-bottom: -1rem;" }
         - if fff.object.attachment.present?
           p.govuk-body.support-letter-attachment-filename
             = render "shared/attachment_with_virus_check_status", item: fff.object, mount_name: :attachment
-
         = fff.input :attachment_cache, as: :hidden
 
         = fff.input :form_answer_id, as: :hidden, input_html: { value: @form_answer.id }
         = fff.input :user_id, as: :hidden, input_html: { value: current_user.id }
 
+        - if ff.object.support_letter_attachment.id.present?
+          = link_to 'Remove Attachment', form_form_answer_support_letter_support_letter_attachment_path(@form_answer, ff.object, ff.object.support_letter_attachment), method: :delete, class: 'govuk-link'

config/routes.rb

@@ -104,7 +104,9 @@
   namespace :form do
     resources :form_answers do
       resources :supporters, only: [:new, :create, :index, :destroy]
-      resources :support_letters, only: [:create]
+      resources :support_letters, only: [:create] do
+        resources :support_letter_attachments, only: [:show, :destroy]
+      end
       resources :form_attachments, only: [:index, :new, :create, :destroy]
     end
   end