Flatten tags list, cast to array and remove blank elements

app/controllers/support_controller.rb

@@ -26,6 +26,7 @@ class SupportController < ApplicationController
 
   def setup_context
     @dossier_id = dossier&.id
+    @tags = tags
     @options = Helpscout::FormAdapter::OPTIONS
   end
 
@@ -51,6 +52,9 @@ class SupportController < ApplicationController
 
   def tags
     [params[:tags], params[:type]].flatten.compact
+      .map { |tag| tag.split(',') }
+      .flatten
+      .reject(&:blank?).uniq
   end
 
   def browser_name

app/views/support/index.html.haml

@@ -42,7 +42,7 @@
         = label_tag :text, 'Pièce jointe'
         = file_field_tag :file
 
-      = hidden_field_tag :tags, params[:tags]
+      = hidden_field_tag :tags, @tags&.join(',')
 
       .send-wrapper
         = button_tag 'Envoyer le message', type: :submit, class: 'button send primary'

spec/controllers/support_controller_spec.rb

@@ -38,6 +38,17 @@ describe SupportController, type: :controller do
         expect(response.body).to include(tag)
       end
     end
+
+    describe "with multiple tags" do
+      let(:tags) { ['yolo', 'toto'] }
+
+      it 'should fill tags' do
+        get :index, params: { tags: tags }
+
+        expect(response.status).to eq(200)
+        expect(response.body).to include(tags.join(','))
+      end
+    end
   end
 
   context 'signed out' do