Reply to for email notifications (#152)

* Reply to for email notifications

* Polish Code

app/Notifications/Forms/FormSubmissionNotification.php

@@ -51,7 +51,7 @@ class FormSubmissionNotification extends Notification implements ShouldQueue
             ->outputStringsOnly();
 
         return (new MailMessage)
-            ->replyTo($notifiable->routes['mail'])
+            ->replyTo($this->getReplyToEmail($notifiable->routes['mail']))
             ->from($this->getFromEmail(), config('app.name'))
             ->subject('New form submission for "'.$this->event->form->title.'"')
             ->markdown('mail.form.submission-notification', [
@@ -66,4 +66,36 @@ class FormSubmissionNotification extends Notification implements ShouldQueue
         return $originalFromAddress->first(). '+' . time() . '@' . $originalFromAddress->last();
     }
 
+    private function getReplyToEmail($default)
+    {
+        return $this->getRespondentEmail() ?? $default;
+    }
+
+    private function getRespondentEmail()
+    {
+        // Make sure we only have one email field in the form
+        $emailFields = collect($this->event->form->properties)->filter(function ($field) {
+            $hidden = $field['hidden'] ?? false;
+
+            return !$hidden && $field['type'] == 'email';
+        });
+        if ($emailFields->count() != 1) {
+            return null;
+        }
+
+        if (isset($this->event->data[$emailFields->first()['id']])) {
+            $email = $this->event->data[$emailFields->first()['id']];
+            if ($this->validateEmail($email)) {
+                return $email;
+            }
+        }
+
+        return null;
+    }
+
+    public static function validateEmail($email): bool
+    {
+        return (bool)filter_var($email, FILTER_VALIDATE_EMAIL);
+    }
+
 }

resources/js/components/open/forms/components/form-components/components/FormNotificationsOption.vue

@@ -33,6 +33,7 @@
       </h2>
       <toggle-switch-input name="notifies" :form="form" class="mt-4"
                            label="Receive email notifications on submission"
+                           :help="notifiesHelp"
       />
       <text-area-input v-if="form.notifies" name="notification_emails" :form="form" class="mt-4"
                        label="Notification Emails" help="Add one email per line"
@@ -62,6 +63,19 @@ export default {
       set (value) {
         this.$store.commit('open/working_form/set', value)
       }
+    },
+    replayToEmailField () {
+      const emailFields = this.form.properties.filter((field) => {
+        return field.type === 'email' && !field.hidden
+      })
+      if (emailFields.length === 1) return emailFields[0]
+      return null
+    },
+    notifiesHelp () {
+      if (this.replayToEmailField) {
+        return 'Reply-to for this notification will be the email filled in the field "' + this.replayToEmailField.name + '".'
+      }
+      return 'Reply-to for this notification will be your own email. Add a single email field to your form, and it will automatically become the reply to value.'
     }
   },