DossierController: user can destroy pjs

app/controllers/new_user/dossiers_controller.rb

@@ -4,11 +4,11 @@ module NewUser
 
     SESSION_USER_RETURN_LOCATION = 'user_return_to'
     ACTIONS_ALLOWED_TO_ANY_USER = [:index, :recherche, :new]
-    ACTIONS_ALLOWED_TO_OWNER_OR_INVITE = [:show, :demande, :messagerie, :brouillon, :update_brouillon, :modifier, :update, :create_commentaire]
+    ACTIONS_ALLOWED_TO_OWNER_OR_INVITE = [:show, :demande, :messagerie, :brouillon, :update_brouillon, :modifier, :update, :create_commentaire, :purge_champ_piece_justificative]
 
     before_action :ensure_ownership!, except: ACTIONS_ALLOWED_TO_ANY_USER + ACTIONS_ALLOWED_TO_OWNER_OR_INVITE
     before_action :ensure_ownership_or_invitation!, only: ACTIONS_ALLOWED_TO_OWNER_OR_INVITE
-    before_action :ensure_dossier_can_be_updated, only: [:update_identite, :update_brouillon, :modifier, :update]
+    before_action :ensure_dossier_can_be_updated, only: [:update_identite, :update_brouillon, :modifier, :update, :purge_champ_piece_justificative]
     before_action :forbid_invite_submission!, only: [:update_brouillon]
     before_action :forbid_closed_submission!, only: [:update_brouillon]
     before_action :show_demarche_en_test_banner
@@ -230,6 +230,14 @@ module NewUser
       redirect_to url_for dossiers_path
     end
 
+    def purge_champ_piece_justificative
+      @champ = dossier.champs.find(params[:champ_id])
+
+      @champ.piece_justificative_file.purge
+
+      flash.notice = 'La pièce jointe a bien été supprimée.'
+    end
+
     private
 
     def store_user_location!

app/views/new_user/dossiers/purge_champ_piece_justificative.js.erb

@@ -0,0 +1,2 @@
+<%= render_flash(timeout: 5000, sticky: true) %>
+<%= remove_element("#piece_justificative_#{@champ.id}") %>

app/views/shared/dossiers/editable_champs/_piece_justificative.html.haml

@@ -10,9 +10,12 @@
     id: "champs_#{champ.id}",
     direct_upload: true
 - else
-  = render partial: "shared/champs/piece_justificative/pj_link", locals: { champ: champ, user_can_upload: true }
-  %br
-  Modifier :
+  %div{ id: "piece_justificative_#{champ.id}" }
+    = render partial: "shared/champs/piece_justificative/pj_link", locals: { champ: champ, user_can_upload: true }
+    %br
+    = link_to 'supprimer', purge_champ_piece_justificative_dossier_path(champ_id: champ.id), remote: true, method: :delete
+    %br
+    Modifier :
   = form.file_field :piece_justificative_file,
     id: "champs_#{champ.id}",
     direct_upload: true