Allow users to delete dashboard polls

app/controllers/dashboard/polls_controller.rb

@@ -35,6 +35,16 @@ class Dashboard::PollsController < Dashboard::BaseController
     end
   end
 
+  def destroy
+    if ::Poll::Voter.where(poll: poll).any?
+      redirect_to proposal_dashboard_polls_path(proposal), alert: t("dashboard.polls.poll.unable_notice")
+    else
+      poll.destroy
+
+      redirect_to proposal_dashboard_polls_path(proposal), notice: t("dashboard.polls.poll.success_notice")
+    end
+  end
+
   private
 
     def poll

app/views/dashboard/polls/_poll.html.erb

@@ -1,8 +1,8 @@
 <div id="<%= dom_id(poll) %>" class="small-12 medium-6 large-4 column end">
   <div class="poll-card" data-equalizer-watch="poll-cards">
     <h4>
-      <%= link_to poll.title, 
-                  proposal_poll_path(proposal, poll), 
+      <%= link_to poll.title,
+                  proposal_poll_path(proposal, poll),
                   target: "_blank" %>
     </h4>
     <span class="small">
@@ -19,7 +19,7 @@
                     edit_proposal_dashboard_poll_path(proposal, poll), class: "button hollow" %>
       <% else %>
         <%= link_to t("dashboard.polls.poll.view_results"),
-                    results_proposal_poll_path(proposal, poll), 
+                    results_proposal_poll_path(proposal, poll),
                     class: "button", target: "_blank" %>
       <% end %>
     </div>
@@ -31,5 +31,11 @@
         class: "js-submit-on-change" %>
     <% end %>
     <p class="help-text"><%= t("dashboard.polls.poll.show_results_help") %></p>
+
+    <%= link_to t("dashboard.polls.poll.delete"),
+                proposal_dashboard_poll_path(proposal, poll),
+                method: :delete,
+                "data-confirm": t("dashboard.polls.poll.alert_notice"),
+                class: "delete" %>
   </div>
 </div>

config/locales/en/general.yml

@@ -558,6 +558,10 @@ en:
         edit_poll: Edit survey
         show_results: Show results
         show_results_help: If you check this box the results will be public and all users will be able to see them
+        delete: Delete survey
+        alert_notice: This action will remove the survey and all its associated questions.
+        success_notice: Survey deleted successfully
+        unable_notice: You cannot destroy a survey that has responses
       form:
         name: Survey title
         add_question: Add question

config/locales/es/general.yml

@@ -558,6 +558,10 @@ es:
         edit_poll: Editar encuesta
         show_results: Mostrar resultados
         show_results_help: Si marcas esta casilla los resultados serán públicos y todos los usuarios podrán verlos
+        delete: Eliminar encuesta
+        alert_notice: Esta acción eliminará la encuesta y todas sus preguntas asociadas.
+        success_notice: Encuesta eliminada correctamente
+        unable_notice: No se pueden eliminar encuestas con respuestas
       form:
         name: Título de la encuesta
         add_question: Añadir pregunta

config/routes/proposal.rb

@@ -11,7 +11,7 @@ resources :proposals do
     resources :achievements, only: [:index], controller: "dashboard/achievements"
     resources :successful_supports, only: [:index], controller: "dashboard/successful_supports"
     resources :supports, only: [:index], controller: "dashboard/supports"
-    resources :polls, except: [:show, :destroy], controller: "dashboard/polls"
+    resources :polls, except: [:show], controller: "dashboard/polls"
     resources :mailing, only: [:index, :new, :create], controller: "dashboard/mailing"
     resources :poster, only: [:index, :new], controller: "dashboard/poster"
     resources :actions, only: [], controller: "dashboard/actions" do

spec/features/dashboard/polls_spec.rb

@@ -153,6 +153,34 @@ describe "Polls" do
     end
   end
 
+  scenario "Can destroy poll without responses", :js do
+    poll = create(:poll, related: proposal)
+
+    visit proposal_dashboard_polls_path(proposal)
+
+    within("#poll_#{poll.id}") do
+      accept_confirm { click_link "Delete survey" }
+    end
+
+    expect(page).to have_content("Survey deleted successfully")
+    expect(page).not_to have_content(poll.name)
+  end
+
+  scenario "Can't destroy poll with responses", :js  do
+    poll = create(:poll, related: proposal)
+    create(:poll_question, poll: poll)
+    create(:poll_voter, poll: poll)
+
+    visit proposal_dashboard_polls_path(proposal)
+
+    within("#poll_#{poll.id}") do
+      accept_confirm { click_link "Delete survey" }
+    end
+
+    expect(page).to have_content("You cannot destroy a survey that has responses")
+    expect(page).to have_content(poll.name)
+  end
+
   scenario "View results not available for upcoming polls" do
     poll = create(:poll, related: proposal, starts_at: 1.week.from_now)