Link to edit the permissions for a batch when they're not present

This allows a user to complete an unfinished batch (i.e. one where the
user has uploaded a CSV file but not selected any permissions).

app/helpers/batch_invitations_helper.rb

@@ -1,4 +1,12 @@
 module BatchInvitationsHelper
+  def batch_invite_status_link(batch_invitation, &block)
+    if !batch_invitation.has_permissions?
+      link_to(new_batch_invitation_permissions_path(batch_invitation), alt: "Edit this batch's permissions", &block)
+    else
+      link_to(batch_invitation_path(batch_invitation), alt: "View this batch", &block)
+    end
+  end
+
   def batch_invite_status_message(batch_invitation)
     if batch_invitation.in_progress?
       "In progress. " \

app/views/batch_invitations/new.html.erb

@@ -17,7 +17,7 @@
       <% recent_batch_invitations.each do |batch_invitation| %>
         <tr>
           <td>
-            <%= link_to(batch_invitation_path(batch_invitation), alt: "View this batch") do %>
+            <%= batch_invite_status_link(batch_invitation) do %>
               <%= batch_invitation.batch_invitation_users.count %> users by <%= batch_invitation.user.name %> at <%= batch_invitation.created_at.to_fs(:govuk_date) %>
             <% end %>
           </td>

test/helpers/batch_invitations_helper_test.rb

@@ -93,4 +93,18 @@ class BatchInvitationsHelperTest < ActionView::TestCase
       end
     end
   end
+
+  context "#batch_invite_status_link" do
+    should "link to show the batch when it has permissions" do
+      batch_invitation = create(:batch_invitation, :has_permissions, outcome: "success")
+
+      assert_includes batch_invite_status_link(batch_invitation) {}, batch_invitation_path(batch_invitation)
+    end
+
+    should "link to show edit the permissions when it has no permissions" do
+      batch_invitation = create(:batch_invitation)
+
+      assert_includes batch_invite_status_link(batch_invitation) {}, new_batch_invitation_permissions_path(batch_invitation)
+    end
+  end
 end