ensure unique recipients

app/controllers/submissions_controller.rb

@@ -57,6 +57,11 @@ class SubmissionsController < ApplicationController
     Submissions.send_signature_requests(submissions)
 
     redirect_to template_path(@template), notice: I18n.t('new_recipients_have_been_added')
+  rescue Submissions::CreateFromSubmitters::BaseError => e
+    render turbo_stream: turbo_stream.replace(:submitters_error,
+                                              partial: 'submissions/error',
+                                              locals: { error: e.message }),
+           status: :unprocessable_entity
   end
 
   def destroy

app/controllers/templates_preferences_controller.rb

@@ -24,7 +24,7 @@ class TemplatesPreferencesController < ApplicationController
                       documents_copy_email_enabled documents_copy_email_attach_audit
                       documents_copy_email_attach_documents documents_copy_email_reply_to
                       completed_notification_email_attach_documents
-                      completed_redirect_url
+                      completed_redirect_url validate_unique_submitters
                       submitters_order require_phone_2fa
                       completed_notification_email_subject completed_notification_email_body
                       completed_notification_email_enabled completed_notification_email_attach_audit] +

app/views/submissions/_error.html.erb

@@ -0,0 +1,7 @@
+<div id="submitters_error">
+  <% if local_assigns[:error] %>
+    <div class="text-center text-red-500">
+      <%= local_assigns[:error] %>
+    </div>
+  <% end %>
+</div>

app/views/submissions/new.html.erb

@@ -28,6 +28,7 @@
     <div id="list" class="hidden">
       <%= render 'list_form', template: @template %>
     </div>
+    <%= render 'submissions/error' %>
   </div>
   <%= content_for(:modal_extra) %>
 <% end %>

app/views/templates_preferences/show.html.erb

@@ -335,6 +335,18 @@
           </div>
         <% end %>
       <% end %>
+      <% if can?(:manage, :personalization_advanced) %>
+        <%= form_for @template, url: template_preferences_path(@template), method: :post, html: { autocomplete: 'off', class: 'mt-2' }, data: { close_on_submit: false } do |f| %>
+          <div class="flex items-center mt-4 justify-between w-full">
+            <span>
+              <%= t('ensure_unique_recipients') %>
+            </span>
+            <%= f.fields_for :preferences, Struct.new(:validate_unique_submitters).new(@template.preferences['validate_unique_submitters']) do |ff| %>
+              <%= ff.check_box :validate_unique_submitters, { class: 'toggle', onchange: 'this.form.requestSubmit()' }, 'true', '' %>
+            <% end %>
+          </div>
+        <% end %>
+      <% end %>
       <div class="form-control mt-5 pb-2">
         <%= button_tag button_title(title: t('save'), disabled_with: t('updating')), class: 'base-button', form: :submitters_form %>
       </div>

config/locales/i18n.yml

@@ -22,6 +22,7 @@ en: &en
   thanks: Thanks
   bcc_recipients: BCC recipients
   always_enforce_signing_order: Always enforce the signing order
+  ensure_unique_recipients: Ensure unique recipients
   edit_per_party: Edit per party
   reply_to: Reply to
   pending_by_me: Pending by me
@@ -795,6 +796,7 @@ en: &en
       read: Read your data
 
 es: &es
+  ensure_unique_recipients: Asegurar destinatarios únicos
   require_phone_2fa_to_open: Requiere 2FA por teléfono para abrir
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: El remitente ha solicitado una autenticación de dos factores mediante una contraseña de un solo uso enviada a su número de teléfono <b>%{phone}</b>.
   send_verification_code: Enviar código de verificación
@@ -1572,6 +1574,7 @@ es: &es
       read: Leer tus datos
 
 it: &it
+  ensure_unique_recipients: Assicurarsi destinatari unici
   require_phone_2fa_to_open: Richiedi l'autenticazione a due fattori tramite telefono per aprire
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: Il mittente ha richiesto un'autenticazione a due fattori tramite una password monouso inviata al tuo numero di telefono <b>%{phone}</b>.
   send_verification_code: Invia codice di verifica
@@ -2348,6 +2351,7 @@ it: &it
       read: Leggi i tuoi dati
 
 fr: &fr
+  ensure_unique_recipients: Assurer l'unicité des destinataires
   require_phone_2fa_to_open: Requiert une 2FA par téléphone pour ouvrir
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: L'expéditeur a demandé une authentification à deux facteurs via un mot de passe à usage unique envoyé à votre numéro de téléphone <b>%{phone}</b>.
   send_verification_code: Envoyer le code de vérification
@@ -3126,6 +3130,7 @@ fr: &fr
       read: Lire vos données
 
 pt: &pt
+  ensure_unique_recipients: Garantir destinatários únicos
   require_phone_2fa_to_open: Necessário autenticação de dois fatores via telefone para abrir
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: O remetente solicitou uma autenticação de dois fatores via senha de uso único enviada para seu número <b>%{phone}</b>.
   send_verification_code: Enviar código de verificação
@@ -3904,6 +3909,7 @@ pt: &pt
       read: Ler seus dados
 
 de: &de
+  ensure_unique_recipients: Stellen Sie einzigartige Empfänger sicher
   require_phone_2fa_to_open: Telefon-2FA zum Öffnen erforderlich
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: Der Absender hat eine Zwei-Faktor-Authentifizierung per Einmalpasswort angefordert, das an Ihre <b>%{phone}</b>-Telefonnummer gesendet wurde.
   send_verification_code: Bestätigungscode senden

lib/submissions/create_from_submitters.rb

@@ -65,6 +65,12 @@ module Submissions
           raise BaseError, 'Defined more signing parties than in template'
         end
 
+        if template.preferences['validate_unique_submitters'] == true
+          submission_emails = submission.submitters.filter_map(&:email)
+
+          raise BaseError, 'Recipient emails should differ' if submission_emails.uniq.size != submission_emails.size
+        end
+
         next if submission.submitters.blank?
 
         maybe_add_invite_submitters(submission, template)