Use number fields to enter number of votes

This way the fields are easier to use, and we can get rid of the
placeholders.

Note we're simplifying the `answer_result_value` in order to make it
easier to return `0` instead of `nil` when the field is empty.

Also note there's a small change of behavior here; previously, these
fields were empty by default, and now their value is `0` by default, so
blindly clicking the "Save" button would send `0` instead of an empty
value. I don't think it's a big deal, though, but we need to keep that
in mind.

app/components/officing/results/form_component.html.erb

@@ -14,7 +14,7 @@
       <% question.question_options.each_with_index do |option, i| %>
         <div class="small-12 medium-6 large-3 column end">
           <%= label_tag "questions_#{question.id}_#{i}", option.title %>
-          <%= text_field_tag "questions[#{question.id}][#{i}]", answer_result_value(question.id, i), placeholder: "0" %>
+          <%= number_field_tag "questions[#{question.id}][#{i}]", answer_result_value(question.id, i), min: 0 %>
         </div>
       <% end %>
     </fieldset>
@@ -24,17 +24,17 @@
   <div class="row">
     <div class="small-12 medium-6 large-3 column">
       <%= label_tag :whites, t("officing.results.new.ballots_white") %>
-      <%= text_field_tag :whites, params[:whites].presence, placeholder: "0" %>
+      <%= number_field_tag :whites, params[:whites].to_i, min: 0 %>
     </div>
 
     <div class="small-12 medium-6 large-3 column end">
       <%= label_tag :nulls, t("officing.results.new.ballots_null") %>
-      <%= text_field_tag :nulls, params[:nulls].presence, placeholder: "0" %>
+      <%= number_field_tag :nulls, params[:nulls].to_i, min: 0 %>
     </div>
 
     <div class="small-12 medium-6 large-3 column end">
       <%= label_tag :total, t("officing.results.new.ballots_total") %>
-      <%= text_field_tag :total, params[:total].presence, placeholder: "0" %>
+      <%= number_field_tag :total, params[:total].to_i, min: 0 %>
     </div>
   </div>
   <hr>

app/components/officing/results/form_component.rb

@@ -10,10 +10,6 @@ class Officing::Results::FormComponent < ApplicationComponent
   private
 
     def answer_result_value(question_id, option_index)
-      return nil if params.blank?
-      return nil if params[:questions].blank?
-      return nil if params[:questions][question_id.to_s].blank?
-
-      params[:questions][question_id.to_s][option_index.to_s]
+      params.dig(:questions, question_id.to_s, option_index.to_s).to_i
     end
 end

spec/components/officing/results/form_component_spec.rb

@@ -0,0 +1,19 @@
+require "rails_helper"
+
+describe Officing::Results::FormComponent do
+  let(:poll) { create(:poll, ends_at: 1.day.ago) }
+  before { create(:poll_question, :yes_no, poll: poll, title: "Agreed?") }
+
+  it "uses number fields with 0 as a default value" do
+    render_inline Officing::Results::FormComponent.new(poll, Poll::OfficerAssignment.none)
+
+    page.find(:fieldset, "Agreed?") do |fieldset|
+      expect(fieldset).to have_field "Yes", with: 0, type: :number
+      expect(fieldset).to have_field "No", with: 0, type: :number
+    end
+
+    expect(page).to have_field "Totally blank ballots", with: 0, type: :number
+    expect(page).to have_field "Invalid ballots", with: 0, type: :number
+    expect(page).to have_field "Valid ballots", with: 0, type: :number
+  end
+end