feat(mail): link with hosts for recipient for notification mailer

app/mailers/concerns/mailer_headers_configurable_concern.rb

@@ -27,7 +27,8 @@ module MailerHeadersConfigurableConcern
       end
 
       self.class.default from: from, reply_to: from
-      self.class.default_url_options = { host: Current.host }
+      self.class.default_url_options[:host] = Current.host
+      Rails.application.routes.default_url_options[:host] = Current.host # link generated by url helpers in tags substitutions
       self.class.asset_host = Current.application_base_url
     end
 

app/mailers/notification_mailer.rb

@@ -33,6 +33,8 @@ class NotificationMailer < ApplicationMailer
       return
     end
 
+    configure_defaults_for_user(@dossier.user)
+
     @subject = "Votre dossier rempli par le mandataire #{@dossier.mandataire_first_name} #{@dossier.mandataire_last_name} a été mis à jour"
     @email = @dossier.individual.email
     @logo_url = procedure_logo_url(@dossier.procedure)
@@ -78,6 +80,7 @@ class NotificationMailer < ApplicationMailer
 
   def set_dossier
     @dossier = params[:dossier]
+    configure_defaults_for_user(@dossier.user)
 
     if @dossier.skip_user_notification_email?
       mail.perform_deliveries = false

spec/mailers/notification_mailer_spec.rb

@@ -73,8 +73,8 @@ RSpec.describe NotificationMailer, type: :mailer do
     end
 
     it 'renders the actions' do
-      expect(mail.body).to have_link('Consulter mon dossier', href: dossier_url(dossier))
+      expect(mail.body).to have_link('Consulter mon dossier', href: dossier_url(dossier, host: ENV.fetch("APP_HOST_LEGACY")))
-      expect(mail.body).to have_link('J’ai une question', href: messagerie_dossier_url(dossier))
+      expect(mail.body).to have_link('J’ai une question', href: messagerie_dossier_url(dossier, host: ENV.fetch("APP_HOST_LEGACY")))
     end
 
     context 'when the template body contains tags' do
@@ -85,7 +85,16 @@ RSpec.describe NotificationMailer, type: :mailer do
       end
 
       it 'replaces link tags with a clickable link' do
-        expect(mail.body).to have_link(dossier_url(dossier))
+        expect(mail.body).to have_link(dossier_url(dossier, host: ENV.fetch("APP_HOST_LEGACY")))
+      end
+
+      context "when user has preferred domain" do
+        let(:user) { create(:user, preferred_domain: :demarches_gouv_fr) }
+
+        it do
+          expect(mail.body).to have_link(dossier_url(dossier, host: ENV.fetch("APP_HOST")))
+          expect(header_value("From", mail)).to include("@demarches.gouv.fr")
+        end
       end
     end