Embody the spirit of halloween

app/models/terms_of_service.rb

@@ -23,7 +23,7 @@ class TermsOfService < ApplicationRecord
   validates :changelog, :effective_date, presence: true, if: -> { published? }
   validates :effective_date, uniqueness: true
 
-  validate :effective_date_cannot_be_in_the_past
+  validate :effective_date_cannot_be_in_the_past, if: :effective_date?
 
   NOTIFICATION_ACTIVITY_CUTOFF = 1.year.freeze
 
@@ -31,6 +31,10 @@ class TermsOfService < ApplicationRecord
     live.first || upcoming.first # For the case when none of the published terms have become effective yet
   end
 
+  def usable_effective_date
+    effective_date || Time.zone.today
+  end
+
   def published?
     published_at.present?
   end
@@ -66,10 +70,14 @@ class TermsOfService < ApplicationRecord
   private
 
   def effective_date_cannot_be_in_the_past
-    return if effective_date.blank?
+    errors.add(:effective_date, :too_soon, date: minimum_allowed_effective_date) if effective_date_too_early?
+  end
 
-    min_date = TermsOfService.live.pick(:effective_date) || Time.zone.today
+  def effective_date_too_early?
+    effective_date < minimum_allowed_effective_date
+  end
 
-    errors.add(:effective_date, :too_soon, date: min_date) if effective_date < min_date
+  def minimum_allowed_effective_date
+    self.class.live.pick(:effective_date) || Time.zone.today
   end
 end

app/views/terms_of_service_interstitial/show.html.haml

@@ -6,8 +6,10 @@
 .simple_form
   %h1.title= t('terms_of_service_interstitial.title', domain: site_hostname)
 
-  - effective_date = @terms_of_service.effective_date || Time.zone.today
+  - if @terms_of_service.usable_effective_date.past?
-  %p.lead= effective_date.past? ? t('terms_of_service_interstitial.past_preamble_html') : t('terms_of_service_interstitial.future_preamble_html', date: l(effective_date))
+    %p.lead= t('terms_of_service_interstitial.past_preamble_html')
+  - else
+    %p.lead= t('terms_of_service_interstitial.future_preamble_html', date: l(@terms_of_service.usable_effective_date))
 
   %p.lead= t('user_mailer.terms_of_service_changed.agreement', domain: site_hostname)
 

app/views/user_mailer/terms_of_service_changed.html.haml

@@ -9,7 +9,7 @@
       %table.email-inner-card-table{ cellspacing: 0, cellpadding: 0, border: 0, role: 'presentation' }
         %tr
           %td.email-inner-card-td.email-prose
-            %p= t('user_mailer.terms_of_service_changed.description_html', path: terms_of_service_version_url(date: @terms_of_service.effective_date), domain: site_hostname, date: l(@terms_of_service.effective_date || Time.zone.today))
+            %p= t('user_mailer.terms_of_service_changed.description_html', path: terms_of_service_version_url(date: @terms_of_service.effective_date), domain: site_hostname, date: l(@terms_of_service.usable_effective_date))
             %p
               %strong= t('user_mailer.terms_of_service_changed.changelog')
             = markdown(@terms_of_service.changelog)

app/views/user_mailer/terms_of_service_changed.text.erb

@@ -2,7 +2,7 @@
 
 ===
 
-<%= t('user_mailer.terms_of_service_changed.description', domain: site_hostname, date: l(@terms_of_service.effective_date || Time.zone.today)) %>
+<%= t('user_mailer.terms_of_service_changed.description', domain: site_hostname, date: l(@terms_of_service.usable_effective_date)) %>
 
 => <%= terms_of_service_version_url(date: @terms_of_service.effective_date) %>
 

spec/models/terms_of_service_spec.rb

@@ -108,6 +108,24 @@ RSpec.describe TermsOfService do
     end
   end
 
+  describe '#usable_effective_date' do
+    subject { terms_of_service.usable_effective_date }
+
+    let(:terms_of_service) { Fabricate.build(:terms_of_service, effective_date:) }
+
+    context 'when effective_date value is set' do
+      let(:effective_date) { 5.days.ago }
+
+      it { is_expected.to eq(effective_date.to_date) }
+    end
+
+    context 'when effective_date value is not set' do
+      let(:effective_date) { nil }
+
+      it { is_expected.to eq(Time.zone.today) }
+    end
+  end
+
   describe '::current' do
     context 'when no terms exist' do
       it 'returns nil' do