add download combined pdf button

app/controllers/submissions_debug_controller.rb

@@ -16,13 +16,16 @@ class SubmissionsDebugController < ApplicationController
         render 'submit_form/show'
       end
       f.pdf do
-        if params[:audit]
-          Submissions::GenerateAuditTrail.call(@submitter.submission)
-        else
-          Submissions::GenerateResultAttachments.call(@submitter)
-        end
+        result =
+          if params[:audit]
+            Submissions::GenerateAuditTrail.call(@submitter.submission)
+          elsif params[:combined]
+            Submissions::GenerateCombinedAttachment.call(@submitter)
+          else
+            Submissions::GenerateResultAttachments.call(@submitter)
+          end
 
-        send_data ActiveStorage::Attachment.where(name: params[:audit] ? :audit_trail : :documents).last.download,
+        send_data Array.wrap(result).first.download,
                   filename: 'debug.pdf',
                   disposition: 'inline',
                   type: 'application/pdf'

app/controllers/submissions_download_controller.rb

@@ -33,7 +33,17 @@ class SubmissionsDownloadController < ApplicationController
       return head :not_found
     end
 
-    render json: build_urls(last_submitter)
+    if params[:combined]
+      url = build_combined_url(submitter)
+
+      if url
+        render json: [url]
+      else
+        head :not_found
+      end
+    else
+      render json: build_urls(last_submitter)
+    end
   end
 
   private
@@ -47,4 +57,14 @@ class SubmissionsDownloadController < ApplicationController
       ActiveStorage::Blob.proxy_url(attachment.blob, expires_at: FILES_TTL.from_now.to_i)
     end
   end
+
+  def build_combined_url(submitter)
+    return if submitter.submission.submitters.exists?(completed_at: nil)
+    return if submitter.submission.submitters.order(:completed_at).last != submitter
+
+    attachment = submitter.submission.combined_document_attachment
+    attachment ||= Submissions::GenerateCombinedAttachment.call(submitter)
+
+    ActiveStorage::Blob.proxy_url(attachment.blob, expires_at: FILES_TTL.from_now.to_i)
+  end
 end

app/models/submission.rb

@@ -52,6 +52,7 @@ class Submission < ApplicationRecord
   attribute :slug, :string, default: -> { SecureRandom.base58(14) }
 
   has_one_attached :audit_trail
+  has_one_attached :combined_document
 
   has_many :template_schema_documents,
            ->(e) { where(uuid: (e.template_schema.presence || e.template.schema).pluck('attachment_uuid')) },

app/views/icons/_chevron_down.html.erb

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" class="<%= local_assigns[:class] %>" width="44" height="44" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
+  <path stroke="none" d="M0 0h24v24H0z" fill="none" />
+  <path d="M6 9l6 6l6 -6" />
+</svg>

app/views/submissions/show.html.erb

@@ -14,16 +14,42 @@
         </a>
       <% end %>
       <% if last_submitter = @submission.submitters.to_a.select(&:completed_at?).max_by(&:completed_at) %>
-        <download-button data-src="<%= submitter_download_index_path(last_submitter.slug, { sig: params[:sig] }.compact) %>" class="base-button">
-          <span class="flex items-center justify-center space-x-2" data-target="download-button.defaultButton">
-            <%= svg_icon('download', class: 'w-6 h-6') %>
-            <span class="hidden md:inline">Download</span>
-          </span>
-          <span class="flex items-center justify-center space-x-2 hidden" data-target="download-button.loadingButton">
-            <%= svg_icon('loader', class: 'w-6 h-6 animate-spin') %>
-            <span class="hidden md:inline">Downloading</span>
-          </span>
-        </download-button>
+        <% is_all_completed = @submission.submitters.to_a.all?(&:completed_at?) %>
+        <div class="join relative">
+          <download-button data-src="<%= submitter_download_index_path(last_submitter.slug, { sig: params[:sig] }.compact) %>" class="base-button <%= '!rounded-r-none !pr-2' if is_all_completed %>">
+            <span class="flex items-center justify-center space-x-2" data-target="download-button.defaultButton">
+              <%= svg_icon('download', class: 'w-6 h-6') %>
+              <span class="hidden md:inline">Download</span>
+            </span>
+            <span class="flex items-center justify-center space-x-2 hidden" data-target="download-button.loadingButton">
+              <%= svg_icon('loader', class: 'w-6 h-6 animate-spin') %>
+              <span class="hidden md:inline">Downloading</span>
+            </span>
+          </download-button>
+          <% if is_all_completed %>
+            <div class="dropdown dropdown-end">
+              <label tabindex="0" class="base-button !rounded-l-none !pl-1 !pr-2 !border-l-neutral-500">
+                <span class="text-sm align-text-top">
+                  <%= svg_icon('chevron_down', class: 'w-6 h-6 flex-shrink-0 stroke-2') %>
+                </span>
+              </label>
+              <ul tabindex="0" class="z-10 dropdown-content p-2 mt-2 shadow menu text-base bg-base-100 rounded-box text-right">
+                <li>
+                  <download-button data-src="<%= submitter_download_index_path(last_submitter.slug, { sig: params[:sig], combined: true }.compact) %>" class="flex items-center">
+                    <span class="flex items-center justify-center space-x-2" data-target="download-button.defaultButton">
+                      <%= svg_icon('download', class: 'w-6 h-6 flex-shrink-0') %>
+                      <span class="whitespace-nowrap">Download combined PDF</span>
+                    </span>
+                    <span class="flex items-center justify-center space-x-2 hidden" data-target="download-button.loadingButton">
+                      <%= svg_icon('loader', class: 'w-6 h-6 animate-spin') %>
+                      <span>Downloading</span>
+                    </span>
+                  </download-button>
+                </li>
+              </ul>
+            </div>
+          <% end %>
+        </div>
       <% elsif @submission.submitters.to_a.size == 1 %>
         <%= render 'shared/clipboard_copy', text: start_form_url(slug: @submission.template.slug), class: 'base-button', icon_class: 'w-6 h-6 text-white', copy_title: 'Copy Share Link', copied_title: 'Copied to Clipboard' %>
       <% end %>
@@ -77,7 +103,7 @@
       <% submitter_field_counters = Hash.new { 0 } %>
       <% (@submission.template_submitters || @submission.template.submitters).each_with_index do |item, index| %>
         <% submitter = @submission.submitters.find { |e| e.uuid == item['uuid'] } %>
-        <div class="sticky -top-1 bg-base-100 pt-1 -mt-1 z-10">
+        <div class="sticky -top-1 bg-base-100 pt-1 -mt-1">
           <div class="border border-base-300 rounded-md px-2 py-1 mb-1">
             <div class="flex items-center space-x-1">
               <span class="mx-1 w-3 h-3 rounded-full <%= colors[index] %>"></span>