mailers: add a link to the procedure when the account already exists

app/controllers/users/registrations_controller.rb

@@ -25,7 +25,7 @@ class Users::RegistrationsController < Devise::RegistrationsController
     existing_user = User.find_by(email: params[:user][:email])
     if existing_user.present?
       if existing_user.confirmed?
-        UserMailer.new_account_warning(existing_user).deliver_later
+        UserMailer.new_account_warning(existing_user, @procedure).deliver_later
       else
         existing_user.resend_confirmation_instructions
       end

app/mailers/user_mailer.rb

@@ -1,12 +1,15 @@
 # Preview all emails at http://localhost:3000/rails/mailers/user_mailer
 class UserMailer < ApplicationMailer
+  helper MailerHelper
+
   layout 'mailers/layout'
 
-  def new_account_warning(user)
+  def new_account_warning(user, procedure = nil)
     @user = user
     @subject = "Demande de création de compte"
+    @procedure = procedure
 
-    mail(to: user.email, subject: @subject)
+    mail(to: user.email, subject: @subject, procedure: @procedure)
   end
 
   def account_already_taken(user, requested_email)

app/views/user_mailer/new_account_warning.html.haml

@@ -7,9 +7,25 @@
   Une demande de création de compte a été réalisée sur le site demarches-simplifiees.fr pour l'email #{@user.email}.
 
 %p
-  Votre compte existe déjà. Si vous souhaitez changer votre mot de passe, veuillez suivre les instructions à l'adresse suivante
-  #{link_to(new_password_url(@user), new_password_url(@user))}.
+  %strong Votre compte existe déjà.
 
+- if @procedure
+  %p
+    Si vous souhaitez remplir la démarche
+    = surround '« ', ' »,' do
+      %i= @procedure.libelle
+    cliquez sur le bouton ci-dessous.
+
+  = round_button("Commencer la démarche « #{@procedure.libelle.truncate(60)} »", commencer_sign_in_url(path: @procedure.path), :primary)
+  = vertical_margin(16)
+  = round_button('J’ai oublié mon mot de passe', new_password_url(@user), :secondary)
+
+- else
+  %p
+    Vous n'avez rien à faire. Si vous avez oublié votre mot de passe, cliquez sur le bouton ci-dessous.
+  = round_button('J’ai oublié mon mot de passe', new_password_url(@user), :secondary)
+
+= vertical_margin(6)
 %p
   Si vous n'êtes pas à l'origine de cette demande, vous pouvez ignorer ce mail.
 

spec/features/users/sign_up_spec.rb

@@ -114,4 +114,32 @@ feature 'Signing up:' do
       expect(page).to have_content 'Vous devez confirmer votre adresse email pour continuer'
     end
   end
+
+  context 'when the user already has a confirmed account' do
+    before do
+      create(:user, email: user_email, password: user_password)
+    end
+
+    scenario 'they get a warning email, containing a link to the procedure' do
+      visit commencer_path(path: procedure.path)
+      click_on 'Créer un compte'
+
+      sign_up_with user_email, user_password
+
+      # The same page than for initial sign-ups is displayed, to avoid leaking informations
+      # about the accound existence.
+      expect(page).to have_content "nous avons besoin de vérifier votre adresse #{user_email}"
+
+      # A warning email is sent
+      warning_email = open_email(user_email)
+      expect(warning_email.body).to have_text('Votre compte existe déjà')
+
+      # When clicking the main button, the user has a link to directly sign-in
+      # for the procedure they were initially starting
+      click_procedure_sign_in_link_for user_email
+
+      expect(page).to have_current_path new_user_session_path
+      expect(page).to have_procedure_description(procedure)
+    end
+  end
 end

spec/mailers/previews/user_mailer_preview.rb

@@ -3,6 +3,11 @@ class UserMailerPreview < ActionMailer::Preview
     UserMailer.new_account_warning(user)
   end
 
+  def new_account_warning___with_procedure
+    procedure = Procedure.new(libelle: 'Dotation d’Équipement des Territoires Ruraux - Exercice 2019', path: 'dotation-etr')
+    UserMailer.new_account_warning(user, procedure)
+  end
+
   def account_already_taken
     UserMailer.account_already_taken(user, 'dircab@territoires.gouv.fr')
   end

spec/mailers/user_mailer_spec.rb

@@ -8,6 +8,15 @@ RSpec.describe UserMailer, type: :mailer do
 
     it { expect(subject.to).to eq([user.email]) }
     it { expect(subject.body).to include(user.email) }
+    it { expect(subject.body).to have_link('J’ai oublié mon mot de passe') }
+
+    context 'when a procedure is provided' do
+      let(:procedure) { build(:procedure) }
+
+      subject { described_class.new_account_warning(user, procedure) }
+
+      it { expect(subject.body).to have_link("Commencer la démarche « #{procedure.libelle} »", href: commencer_sign_in_url(path: procedure.path)) }
+    end
   end
 
   describe '.account_already_taken' do

spec/support/feature_helpers.rb

@@ -55,6 +55,13 @@ module FeatureHelpers
     visit "/users/confirmation?#{token_params}"
   end
 
+  def click_procedure_sign_in_link_for(email)
+    confirmation_email = open_email(email)
+    procedure_sign_in_link = confirmation_email.body.match(/href="([^"]*\/commencer\/[^"]*)"/)[1]
+
+    visit procedure_sign_in_link
+  end
+
   def click_reset_password_link_for(email)
     reset_password_email = open_email(email)
     token_params = reset_password_email.body.match(/reset_password_token=[^"]+/)