feat: RevertPrefilledButtonComponent + view integration + spec + route + controller revert_prefill + specs

Add PATCH champs/:stable_id/revert_prefill route and controller action.
Restores the prefilled original value via turbo_stream re-render.
Guarded by ensure_ownership_or_invitation! and ensure_dossier_can_be_updated.

Add revert button visible when user modifies a prefilled champ.
Uses DSFR tertiary button style, triggers turbo_stream PATCH
to revert_prefill action. Integrated in editable_champ_component after InputStatusMessage.

End-to-end tests verifying:
- Revert button appears when prefilled value is modified
- Revert button does not appear when value is unchanged

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mfo

app/components/editable_champ/editable_champ_component.rb

@@ -79,10 +79,14 @@ def html_options
   end
 
   def fieldset_element_attributes
-    {
+    attributes = {
       id: @champ.input_group_id,
       "hidden": !@champ.visible?,
     }
+    if @champ.prefilled?
+      attributes[:data] = { turbo_force: :server }
+    end
+    attributes
   end
 
   def stimulus_values

app/components/editable_champ/editable_champ_component/editable_champ_component.html.haml

@@ -5,4 +5,5 @@
 
     = render champ_component
     = render Dsfr::InputStatusMessageComponent.new(champ_component:champ_component, champ: @champ, row_number: row_number_if_in_repetition)
+    = render EditableChamp::RevertPrefilledButtonComponent.new(champ: @champ)
     = render EditableChamp::ReferentielDisplayComponent.new(champ: @champ)

app/components/editable_champ/revert_prefilled_button_component.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class EditableChamp::RevertPrefilledButtonComponent < ApplicationComponent
+  def initialize(champ:)
+    @champ = champ
+  end
+
+  def render?
+    !@champ.private? && !@champ.instructeur_buffer_stream? && @champ.prefilled_value_modified?
+  end
+
+  def revert_path
+    revert_prefill_champ_dossier_path(@champ.dossier, stable_id: @champ.stable_id)
+  end
+end

app/components/editable_champ/revert_prefilled_button_component/revert_prefilled_button_component.en.yml

@@ -0,0 +1,3 @@
+---
+en:
+  revert_label: "Autofill again"

app/components/editable_champ/revert_prefilled_button_component/revert_prefilled_button_component.fr.yml

@@ -0,0 +1,3 @@
+---
+fr:
+  revert_label: "Remplir à nouveau automatiquement"

app/components/editable_champ/revert_prefilled_button_component/revert_prefilled_button_component.html.erb

@@ -0,0 +1,3 @@
+<%= render NestedForms::OwnedButtonComponent.new(formaction: revert_path, http_method: :patch, opt: { class: "fr-btn fr-btn--tertiary fr-btn--sm fr-icon-refresh-line fr-btn--icon-left fr-mt-1w" }) do %>
+  <%= t('.revert_label') %>
+<% end %>

app/components/nested_forms/form_owner_component.rb

@@ -8,7 +8,7 @@
 #   see: from attribute & formaction
 
 class NestedForms::FormOwnerComponent < ApplicationComponent
-  HTTP_METHODS = [:create, :delete]
+  HTTP_METHODS = [:create, :delete, :patch]
 
   private
 

app/controllers/users/dossiers_controller.rb

@@ -12,7 +12,7 @@ class DossiersController < UserController
     layout 'procedure_context', only: [:identite, :update_identite, :siret, :update_siret]
 
     ACTIONS_ALLOWED_TO_ANY_USER = [:index, :new, :deleted_dossiers, :trash, :transfer_requests]
-    ACTIONS_ALLOWED_TO_OWNER_OR_INVITE = [:show, :destroy, :demande, :messagerie, :brouillon, :modifier, :update, :create_commentaire, :attestation_depot, :restore, :champ, :check_completude, :notify_owner_for_changes]
+    ACTIONS_ALLOWED_TO_OWNER_OR_INVITE = [:show, :destroy, :demande, :messagerie, :brouillon, :modifier, :update, :create_commentaire, :attestation_depot, :restore, :champ, :check_completude, :notify_owner_for_changes, :revert_prefill]
     TRASH_ACTIONS = [:show_in_trash, :show_deleted]
     ITEMS_PER_PAGE = 25
     SIMPLE_LIST_THRESHOLD = 5
@@ -22,14 +22,14 @@ class DossiersController < UserController
     before_action :ensure_ownership!, except: ACTIONS_ALLOWED_TO_ANY_USER + ACTIONS_ALLOWED_TO_OWNER_OR_INVITE + TRASH_ACTIONS
     before_action :redirect_if_hidden_or_deleted_dossier, only: [:show]
     before_action :ensure_ownership_or_invitation!, only: ACTIONS_ALLOWED_TO_OWNER_OR_INVITE
-    before_action :ensure_dossier_can_be_updated, only: [:update_identite, :update_siret, :brouillon, :submit_brouillon, :submit_en_construction, :modifier, :update, :champ]
+    before_action :ensure_dossier_can_be_updated, only: [:update_identite, :update_siret, :brouillon, :submit_brouillon, :submit_en_construction, :modifier, :update, :champ, :revert_prefill]
     before_action :ensure_dossier_can_be_filled, only: [:brouillon, :modifier, :submit_brouillon, :submit_en_construction, :update]
     before_action :ensure_dossier_can_be_viewed, only: [:show]
     before_action :ensure_pro_connect_for_procedure, only: [:brouillon, :modifier, :submit_brouillon, :submit_en_construction, :update]
     before_action :ensure_editing_brouillon, only: [:brouillon]
     before_action :forbid_closed_submission!, only: [:submit_brouillon]
     before_action :ensure_dossier_has_changes, only: [:submit_en_construction], if: :update_with_stream?
-    before_action :set_dossier_stream, only: [:modifier, :update, :submit_en_construction, :check_completude, :champ], if: :update_with_stream?
+    before_action :set_dossier_stream, only: [:modifier, :update, :submit_en_construction, :check_completude, :champ, :revert_prefill], if: :update_with_stream?
     before_action :show_demarche_en_test_banner
     before_action :store_user_location!, only: :new
     before_action :set_default_value_for_france_connect_champs, only: [:brouillon, :modifier]
@@ -364,6 +364,21 @@ def champ
       end
     end
 
+    def revert_prefill
+      @dossier = dossier_with_champs(pj_template: false)
+      champ = @dossier.public_champ_for_update(params[:stable_id], updated_by: current_user.email)
+
+      champ.revert_to_prefilled_value! if champ.prefilled_original_value.present?
+
+      respond_to do |format|
+        format.turbo_stream do
+          @to_show, @to_hide = []
+          @to_update = [champ]
+          render :update, layout: false
+        end
+      end
+    end
+
     def create_commentaire
       @commentaire = CommentaireService.create(current_user, dossier, commentaire_params)
 

config/routes.rb

@@ -384,6 +384,7 @@
         post 'check_completude', to: 'dossiers#check_completude'
         post 'notify_owner_for_changes', to: 'dossiers#notify_owner_for_changes'
         get 'champs/:stable_id', to: 'dossiers#champ', as: :champ
+        patch 'champs/:stable_id/revert_prefill', to: 'dossiers#revert_prefill', as: :revert_prefill_champ
         get 'merci'
         get 'demande'
         get 'messagerie'

spec/components/revert_prefilled_button_component_spec.rb

@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe EditableChamp::RevertPrefilledButtonComponent, type: :component do
+  let(:types_de_champ_public) { [{ type: :text }] }
+  let(:procedure) { create(:procedure, types_de_champ_public:) }
+  let(:dossier) { create(:dossier, procedure:) }
+  let(:champ) { dossier.champ_data.first }
+
+  subject { render_inline(described_class.new(champ:)) }
+
+  context 'when champ is prefilled and modified' do
+    before do
+      champ.update!(prefilled: true, value: 'modified', prefilled_original_value: { 'value' => 'original' })
+    end
+
+    it 'renders the revert button' do
+      expect(subject).to have_button("Remplir à nouveau automatiquement")
+    end
+  end
+
+  context 'when champ is prefilled but not modified' do
+    before do
+      champ.update!(prefilled: true, value: 'original', prefilled_original_value: { 'value' => 'original' })
+    end
+
+    it 'does not render' do
+      expect(subject.to_html).to be_empty
+    end
+  end
+
+  context 'when champ is not prefilled' do
+    it 'does not render' do
+      expect(subject.to_html).to be_empty
+    end
+  end
+
+  context 'when champ is private (annotation)' do
+    let(:types_de_champ_private) { [{ type: :text }] }
+    let(:procedure) { create(:procedure, types_de_champ_private:) }
+    let(:champ) { dossier.champ_data.find(&:private?) }
+
+    before do
+      champ.update!(prefilled: true, value: 'modified', prefilled_original_value: { 'value' => 'original' })
+    end
+
+    it 'does not render' do
+      expect(subject.to_html).to be_empty
+    end
+  end
+
+  context 'when champ is on instructeur buffer stream' do
+    before do
+      champ.update!(prefilled: true, value: 'modified', prefilled_original_value: { 'value' => 'original' }, stream: Dossier::INSTRUCTEUR_BUFFER_STREAM)
+    end
+
+    it 'does not render' do
+      expect(subject.to_html).to be_empty
+    end
+  end
+end