Merge pull request #10661 from demarches-simplifiees/feat/10460

 ETQ admin, je veux que l'email du déposant ne puisse pas être similaire à l'email du mandataire

app/models/individual.rb

@@ -16,6 +16,7 @@ class Individual < ApplicationRecord
                                   on: :update
 
   validates :email, strict_email: true, presence: true, if: -> { dossier.for_tiers? && self.email? }, on: :update
+  validate :email_different_from_mandataire, on: :update
 
   after_commit -> { dossier.index_search_terms_later }, if: -> { nom_previously_changed? || prenom_previously_changed? }
 
@@ -31,4 +32,10 @@ def self.from_france_connect(fc_information)
   end
 
   def unverified_email? = !email_verified_at?
+
+  def email_different_from_mandataire
+    if email.present? && email.casecmp?(dossier.user.email)
+      errors.add(:email, :must_be_different_from_mandataire)
+    end
+  end
 end

config/locales/models/individual/en.yml

@@ -1,5 +1,11 @@
 en:
   activerecord:
+    errors:
+      models:
+        individual:
+          attributes:
+            email:
+              must_be_different_from_mandataire: "must be different from the agent's email"
     attributes:
       individual:
         gender: Gender

config/locales/models/individual/fr.yml

@@ -1,5 +1,11 @@
 fr:
   activerecord:
+    errors:
+      models:
+        individual:
+          attributes:
+            email:
+              must_be_different_from_mandataire: "doit être différent de celui du mandataire"
     attributes:
       individual:
         gender: Civilité

spec/models/individual_spec.rb

@@ -44,13 +44,33 @@
     end
   end
 
-  context 'when an individual has an invalid notification_method' do
-    let(:invalid_individual) { build(:individual, notification_method: 'invalid_method') }
+  describe 'validate_mandant_email' do
+    let(:user) { create(:user, email: '[email protected]') }
+    let(:dossier) { create(:dossier, :for_tiers_with_notification, user: user) }
+    let(:individual) { dossier.individual }
 
-    it 'raises an ArgumentError' do
-      expect {
-        invalid_individual.valid?
-      }.to raise_error(ArgumentError, "'invalid_method' is not a valid notification_method")
+    context 'when validating email' do
+      it 'is valid when email is different from the mandataire' do
+        individual.email = '[email protected]'
+        expect(individual).to be_valid
+      end
+
+      it 'is invalid when email is the same as the mandataire' do
+        individual.email = '[email protected]'
+        expect(individual).not_to be_valid
+        expect(individual.errors[:email]).to include(
+          I18n.t('activerecord.errors.models.individual.attributes.email.must_be_different_from_mandataire')
+        )
+      end
+
+      it 'is valid when email is not required (notification_method is not email)' do
+        dossier_without_notification = create(:dossier, :for_tiers_without_notification, user: user)
+        individual_without_notification = dossier_without_notification.individual
+
+        expect(individual_without_notification).to be_valid
+        expect(individual_without_notification.email).to be_nil
+        expect(individual_without_notification.notification_method).to eq('no_notification')
+      end
     end
   end
 end