emails: use the notification template for more messages

This allow to display the procedure logo and contact footer
at the bottom of these emails.

app/mailers/application_mailer.rb

@@ -2,4 +2,22 @@ class ApplicationMailer < ActionMailer::Base
   helper :application # gives access to all helpers defined within `application_helper`.
   default from: "demarches-simplifiees.fr <#{CONTACT_EMAIL}>"
   layout 'mailer'
+
+  # Attach the procedure logo to the email (if any).
+  # Returns the attachment url.
+  def attach_logo(procedure)
+    return nil if !procedure.logo?
+
+    begin
+      logo_filename = procedure.logo.filename
+      attachments.inline[logo_filename] = procedure.logo.read
+      attachments[logo_filename].url
+
+    rescue StandardError => e
+      # A problem occured when reading logo, maybe the logo is missing and we should clean the procedure to remove logo reference ?
+      Raven.extra_context(procedure_id: procedure.id)
+      Raven.capture_exception(e)
+      nil
+    end
+  end
 end

app/mailers/dossier_mailer.rb

@@ -6,13 +6,21 @@ class DossierMailer < ApplicationMailer
 
   def notify_new_draft(dossier)
     @dossier = dossier
+    @service = dossier.procedure.service
+    @logo_url = attach_logo(dossier.procedure)
+
     subject = "Retrouvez votre brouillon pour la démarche « #{dossier.procedure.libelle} »"
 
-    mail(to: dossier.user.email, subject: subject)
+    mail(to: dossier.user.email, subject: subject) do |format|
+      format.html { render layout: 'mailers/notification' }
+    end
   end
 
   def notify_new_answer(dossier)
     @dossier = dossier
+    @service = dossier.procedure.service
+    @logo_url = attach_logo(dossier.procedure)
+
     subject = "Nouveau message pour votre dossier nº #{dossier.id} (#{dossier.procedure.libelle})"
 
     mail(to: dossier.user.email, subject: subject) do |format|

app/mailers/notification_mailer.rb

@@ -38,20 +38,9 @@ class NotificationMailer < ApplicationMailer
 
     create_commentaire_for_notification(dossier, subject, body)
 
-    if dossier.procedure.logo?
-      begin
-        logo_filename = dossier.procedure.logo.filename
-        attachments.inline[logo_filename] = dossier.procedure.logo.read
-        @logo_url = attachments[logo_filename].url
-      rescue StandardError => e
-        # A problem occured when reading logo, maybe the logo is missing and we should clean the procedure to remove logo reference ?
-        Raven.extra_context(procedure_id: dossier.procedure.id)
-        Raven.capture_exception(e)
-      end
-    end
-
     @dossier = dossier
     @service = dossier.procedure.service
+    @logo_url = attach_logo(dossier.procedure)
 
     mail(subject: subject, to: email) do |format|
       # rubocop:disable Rails/OutputSafety