FIX: display correct status on unsubscribe page (#10294)

There was a bug that even when `email_digest` was set to false but
`digest_after_minutes` was positive, we were not displaying correct
status.

In addition, the message is improved when the user is unsubscribed +
unsubscribe from all is hidden.

app/controllers/email_controller.rb

@@ -24,6 +24,8 @@ class EmailController < ApplicationController
 
         watching = TopicUser.notification_levels[:watching]
 
+        @unsubscribed_from_all = @user.user_option.unsubscribed_from_all?
+
         if @topic
           @watching_topic = TopicUser.exists?(user_id: @user.id, notification_level: watching, topic_id: @topic.id)
           if @topic.category_id
@@ -132,16 +134,17 @@ class EmailController < ApplicationController
 
   def digest_frequencies(user)
     frequency_in_minutes = user.user_option.digest_after_minutes
+    email_digests = user.user_option.email_digests
     frequencies = DigestEmailSiteSetting.values.dup
     never = frequencies.delete_at(0)
     allowed_frequencies = %w[never weekly every_month every_six_months]
 
     result = frequencies.reduce(frequencies: [], current: nil, selected: nil, take_next: false) do |memo, v|
-      memo[:current] = v[:name] if v[:value] == frequency_in_minutes
+      memo[:current] = v[:name] if v[:value] == frequency_in_minutes && email_digests
       next(memo) unless allowed_frequencies.include?(v[:name])
 
       memo.tap do |m|
-        m[:selected] = v[:value] if m[:take_next]
+        m[:selected] = v[:value] if m[:take_next] && email_digests
         m[:frequencies] << [I18n.t("unsubscribe.digest_frequency.#{v[:name]}"), v[:value]]
         m[:take_next] = !m[:take_next] && m[:current]
       end

app/models/user_option.rb

@@ -182,6 +182,13 @@ class UserOption < ActiveRecord::Base
     self.title_count_mode_key = UserOption.title_count_modes[value.to_sym]
   end
 
+  def unsubscribed_from_all?
+    !mailing_list_mode &&
+      !email_digests &&
+      email_level == UserOption.email_level_types[:never] &&
+      email_messages_level == UserOption.email_level_types[:never]
+  end
+
   private
 
   def update_tracked_topics

app/views/email/unsubscribe.html.erb

@@ -57,10 +57,14 @@
 
           <% if @digest_frequencies[:current] %>
             <h3>
+              <% if @digest_frequencies[:current] == 'never' %>
+                <%= t('unsubscribe.digest_frequency.never_title') %> 
+              <% else %>
                 <%= t(
                   'unsubscribe.digest_frequency.title',
                   frequency: t("unsubscribe.digest_frequency.#{@digest_frequencies[:current]}")
                 ) %>
+            <% end %>
             </h3>
             <br/>
           <% end %>
@@ -74,12 +78,14 @@
           </p>
       <% end %>
 
+      <% unless @unsubscribed_from_all %>
         <p>
         <label>
           <%= check_box_tag 'unsubscribe_all', 1, @type=="all" %>
           <%= t 'unsubscribe.all', sitename: SiteSetting.title %>
         </label>
         </p>
+      <% end %>
 
       <br/>
       <% text = @type=='digest' ? t('unsubscribe.submit') : t('unsubscribe.title') %>

config/locales/server.en.yml

@@ -1028,6 +1028,7 @@ en:
     submit: "Save preferences"
     digest_frequency:
       title: "You are receiving summary emails %{frequency}"
+      never_title: "You are not receiving summary emails"
       select_title: "Set summary emails frequency to:"
 
       never: "never"

spec/requests/email_controller_spec.rb

@@ -191,6 +191,24 @@ RSpec.describe EmailController do
         expect(response.body).to include(I18n.t("unsubscribe.different_user_description"))
       end
 
+      it 'displays correct label when email_digests is set to false' do
+        user.user_option.update!(email_digests: false, digest_after_minutes: 10080)
+
+        navigate_to_unsubscribe
+
+        expect(body).to include("You are not receiving summary emails")
+        expect(body).to include("Don't send me any mail from Discourse")
+      end
+
+      it 'hides unsubscribe from all checkbox when user already unsubscribed' do
+        user.user_option.update!(email_digests: false, mailing_list_mode: false, email_level: 2, email_messages_level: 2)
+
+        navigate_to_unsubscribe
+
+        expect(body).to include("You are not receiving summary emails")
+        expect(body).not_to include("Don't send me any mail from Discourse")
+      end
+
       it 'correctly handles mailing list mode' do
         user.user_option.update_columns(mailing_list_mode: true)