fix bug with directory files upload

app/assets/javascripts/directory_files_input.js

@@ -0,0 +1,9 @@
+$(document).on("turbolinks:load", function() {
+    $("#upload_directory_files").on('click', function(e){
+        const newFilesCount = $('input[name = "directory[files][]"][type = "hidden"]').length;
+
+        if (newFilesCount === 0){
+            e.preventDefault();
+        }
+    });
+});

app/views/directories/_file_form.html.erb

@@ -3,6 +3,6 @@
     <%= render "shared/files_dropzone_fields", form: form, directory: directory %>
   <% end %>
   <div class="pt-3">
-    <%= form.submit t(".submit"), class: "btn btn-block btn-success", data: { disable_with: t("shared.disable_with") } %>
+    <%= form.submit t(".submit"), id: "upload_directory_files", class: "btn btn-block btn-success", data: { disable_with: t("shared.disable_with") } %>
   </div>
 <% end %>

spec/features/user_manages_project_directories_spec.rb

@@ -51,6 +51,13 @@ RSpec.feature "User manages project custom folders", type: :feature do
 
     expect(page).to have_content("UPLOAD NEW FILES")
 
+    expect do
+      click_button "Upload Files"
+    end.not_to raise_exception
+
+    expect(page).to have_content("UPLOAD NEW FILES")
+    expect(page).not_to have_content("The folder has been updated")
+
     drop_file Rails.root.join(file_fixture("person_photo.png")), type: :dropzone
 
     click_button "Upload Files"