FEATURE: per-topic unsubscribe option in emails

app/assets/javascripts/discourse/components/dropdown-button.js.es6

@@ -24,8 +24,11 @@ export default Ember.Component.extend(StringBuffer, {
   }.on('willDestroyElement'),
 
   renderString(buffer) {
+    const title = this.get('title');
+    if (title) {
+      buffer.push("<h4 class='title'>" + title + "</h4>");
+    }
 
-    buffer.push("<h4 class='title'>" + this.get('title') + "</h4>");
     buffer.push("<button class='btn standard dropdown-toggle' data-toggle='dropdown'>");
     buffer.push(this.get('text'));
     buffer.push("</button>");

app/assets/javascripts/discourse/controllers/topic-unsubscribe.js.es6

@@ -0,0 +1,9 @@
+import ObjectController from "discourse/controllers/object";
+
+export default ObjectController.extend({
+
+  stopNotificiationsText: function() {
+    return I18n.t("topic.unsubscribe.stop_notifications", { title: this.get("model.fancyTitle") });
+  }.property("model.fancyTitle"),
+
+})

app/assets/javascripts/discourse/routes/app-route-map.js.es6

@@ -10,6 +10,7 @@ export default function() {
     this.route('fromParamsNear', { path: '/:nearPost' });
   });
   this.resource('topicBySlug', { path: '/t/:slug' });
+  this.route('topicUnsubscribe', { path: '/t/:slug/:id/unsubscribe' });
 
   this.resource('discovery', { path: '/' }, function() {
     // top

app/assets/javascripts/discourse/routes/topic-from-params.js.es6

@@ -2,30 +2,30 @@
 export default Discourse.Route.extend({
 
   // Avoid default model hook
-  model: function(p) { return p; },
+  model(params) { return params; },
 
-  setupController: function(controller, params) {
+  setupController(controller, params) {
     params = params || {};
     params.track_visit = true;
-    var topic = this.modelFor('topic'),
-        postStream = topic.get('postStream');
 
-    var topicController = this.controllerFor('topic'),
+    const self = this,
+          topic = this.modelFor('topic'),
+          postStream = topic.get('postStream'),
+          topicController = this.controllerFor('topic'),
           topicProgressController = this.controllerFor('topic-progress'),
           composerController = this.controllerFor('composer');
 
     // I sincerely hope no topic gets this many posts
     if (params.nearPost === "last") { params.nearPost = 999999999; }
 
-    var self = this;
     params.forceLoad = true;
-    postStream.refresh(params).then(function () {
 
+    postStream.refresh(params).then(function () {
       // TODO we are seeing errors where closest post is null and this is exploding
       // we need better handling and logging for this condition.
 
       // The post we requested might not exist. Let's find the closest post
-      var closestPost = postStream.closestPostForPostNumber(params.nearPost || 1),
+      const closestPost = postStream.closestPostForPostNumber(params.nearPost || 1),
             closest = closestPost.get('post_number'),
             progress = postStream.progressIndexOfPost(closestPost);
 
@@ -43,6 +43,7 @@ export default Discourse.Route.extend({
       Ember.run.scheduleOnce('afterRender', function() {
         self.appEvents.trigger('post:highlight', closest);
       });
+
       Discourse.URL.jumpToPost(closest);
 
       if (topic.present('draft')) {

app/assets/javascripts/discourse/routes/topic-unsubscribe.js.es6

@@ -0,0 +1,23 @@
+import PostStream from "discourse/models/post-stream";
+
+export default Discourse.Route.extend({
+  model(params) {
+    const topic = this.store.createRecord("topic", { id: params.id });
+    return PostStream.loadTopicView(params.id).then(json => {
+      topic.updateFromJson(json);
+      return topic;
+    });
+  },
+
+  afterModel(topic) {
+    // hide the notification reason text
+    topic.set("details.notificationReasonText", null);
+  },
+
+  actions: {
+    didTransition() {
+      this.controllerFor("application").set("showFooter", true);
+      return true;
+    }
+  }
+});

app/assets/javascripts/discourse/templates/topic/unsubscribe.hbs

@@ -0,0 +1,8 @@
+<div class="container">
+  <p>
+    {{{stopNotificiationsText}}}
+  </p>
+  <p>
+    {{i18n "topic.unsubscribe.change_notification_state"}} {{topic-notifications-button topic=model}}
+  </p>
+</div>

app/assets/javascripts/discourse/views/topic-unsubscribe.js.es6

@@ -0,0 +1,3 @@
+export default Discourse.View.extend({
+  classNames: ["topic-unsubscribe"]
+});

app/assets/stylesheets/common/base/topic.scss

@@ -63,3 +63,15 @@
   // Top of bullet aligns with top of line - adjust line height to vertically align bullet.
   line-height: 0.8;
 }
+
+.topic-unsubscribe {
+  .notification-options {
+    display: inline-block;
+    .dropdown-toggle {
+      float: none;
+    }
+    .dropdown-menu {
+      bottom: initial;
+    }
+  }
+}

app/controllers/topics_controller.rb

@@ -24,11 +24,12 @@ class TopicsController < ApplicationController
                                           :bulk,
                                           :reset_new,
                                           :change_post_owners,
-                                          :bookmark]
+                                          :bookmark,
+                                          :unsubscribe]
 
   before_filter :consider_user_for_promotion, only: :show
 
-  skip_before_filter :check_xhr, only: [:show, :feed]
+  skip_before_filter :check_xhr, only: [:show, :unsubscribe, :feed]
 
   def id_for_slug
     topic = Topic.find_by(slug: params[:slug].downcase)
@@ -94,6 +95,26 @@ class TopicsController < ApplicationController
     raise ex
   end
 
+  def unsubscribe
+    @topic_view = TopicView.new(params[:topic_id], current_user)
+
+    if slugs_do_not_match || (!request.format.json? && params[:slug].blank?)
+      return redirect_to @topic_view.topic.unsubscribe_url, status: 301
+    end
+
+    tu = TopicUser.find_by(user_id: current_user.id, topic_id: params[:topic_id])
+
+    if tu.notification_level > TopicUser.notification_levels[:regular]
+      tu.notification_level = TopicUser.notification_levels[:regular]
+    else
+      tu.notification_level = TopicUser.notification_levels[:muted]
+    end
+
+    tu.save!
+
+    perform_show_response
+  end
+
   def wordpress
     params.require(:best)
     params.require(:topic_id)
@@ -476,6 +497,7 @@ class TopicsController < ApplicationController
       format.html do
         @description_meta = @topic_view.topic.excerpt
         store_preloaded("topic_#{@topic_view.topic.id}", MultiJson.dump(topic_view_serializer))
+        render :show
       end
 
       format.json do

app/mailers/user_notifications.rb

@@ -292,6 +292,7 @@ class UserNotifications < ActionMailer::Base
       context: context,
       username: username,
       add_unsubscribe_link: true,
+      unsubscribe_url: post.topic.unsubscribe_url,
       allow_reply_by_email: allow_reply_by_email,
       use_site_subject: use_site_subject,
       add_re_to_subject: add_re_to_subject,
@@ -306,9 +307,7 @@ class UserNotifications < ActionMailer::Base
     }
 
     # If we have a display name, change the from address
-    if from_alias.present?
+    email_opts[:from_alias] = from_alias if from_alias.present?
-      email_opts[:from_alias] = from_alias
-    end
 
     TopicUser.change(user.id, post.topic_id, last_emailed_post_number: post.post_number)
 

app/models/topic.rb

@@ -716,6 +716,10 @@ class Topic < ActiveRecord::Base
     url
   end
 
+  def unsubscribe_url
+    "#{url}/unsubscribe"
+  end
+
   def clear_pin_for(user)
     return unless user.present?
     TopicUser.change(user.id, id, cleared_pinned_at: Time.now)

app/models/topic_user.rb

@@ -8,7 +8,8 @@ class TopicUser < ActiveRecord::Base
   scope :tracking, lambda { |topic_id|
     where(topic_id: topic_id)
    .where("COALESCE(topic_users.notification_level, :regular) >= :tracking",
-                regular: TopicUser.notification_levels[:regular], tracking: TopicUser.notification_levels[:tracking])
+     regular: TopicUser.notification_levels[:regular],
+     tracking: TopicUser.notification_levels[:tracking])
   }
 
   # Class methods
@@ -58,13 +59,9 @@ class TopicUser < ActiveRecord::Base
 
     def create_lookup(topic_users)
       topic_users = topic_users.to_a
-
       result = {}
       return result if topic_users.blank?
-
+      topic_users.each { |ftu| result[ftu.topic_id] = ftu }
-      topic_users.each do |ftu|
-        result[ftu.topic_id] = ftu
-      end
       result
     end
 
@@ -113,11 +110,9 @@ class TopicUser < ActiveRecord::Base
       end
 
       if attrs[:notification_level]
-        MessageBus.publish("/topic/#{topic_id}",
+        MessageBus.publish("/topic/#{topic_id}", { notification_level_change: attrs[:notification_level] }, user_ids: [user_id])
-                         {notification_level_change: attrs[:notification_level]}, user_ids: [user_id])
       end
 
-
     rescue ActiveRecord::RecordNotUnique
       # In case of a race condition to insert, do nothing
     end
@@ -127,7 +122,7 @@ class TopicUser < ActiveRecord::Base
       user_id = user.is_a?(User) ? user.id : topic
 
       now = DateTime.now
-      rows = TopicUser.where({topic_id: topic_id, user_id: user_id}).update_all({last_visited_at: now})
+      rows = TopicUser.where(topic_id: topic_id, user_id: user_id).update_all(last_visited_at: now)
       if rows == 0
         TopicUser.create(topic_id: topic_id, user_id: user_id, last_visited_at: now, first_visited_at: now)
       else

app/views/email/notification.html.erb

@@ -1,28 +1,26 @@
 <div id='main' class=<%= classes %>>
 
-<%= render :partial => 'email/post', :locals => {:post => post} %>
+  <%= render partial: 'email/post', locals: { post: post } %>
 
   <% if context_posts.present? %>
-  <div class='footer'>
+    <div class='footer'>%{respond_instructions}</div>
-    %{respond_instructions}
+
-  </div>
     <hr>
+
     <h4 class='.previous-discussion'><%= t "user_notifications.previous_discussion" %></h4>
 
     <% context_posts.each do |p| %>
-  <%= render :partial => 'email/post', :locals => {:post => p} %>
+      <%= render partial: 'email/post', locals: { post: p } %>
     <% end %>
   <% end %>
 
   <hr>
 
-<div class='footer'>
+  <div class='footer'>%{respond_instructions}</div>
-%{respond_instructions}
+  <div class='footer'>%{unsubscribe_link}</div>
-</div>
+
-<div class='footer'>
-%{unsubscribe_link}
-</div>
 </div>
+
 <div itemscope itemtype="http://schema.org/EmailMessage" style="display:none">
   <div itemprop="action" itemscope itemtype="http://schema.org/ViewAction">
     <link itemprop="url" href="<%= Discourse.base_url %><%= post.url  %>" />

config/locales/client.en.yml

@@ -981,6 +981,9 @@ en:
         search: "There are no more search results."
 
     topic:
+      unsubscribe:
+        stop_notifications: "You will stop receiving notifications for <strong>{{title}}</strong>."
+        change_notification_state: "You can change your notification state"
       filter_to: "{{post_count}} posts in topic"
       create: 'New Topic'
       create_long: 'Create a new Topic'
@@ -1014,7 +1017,6 @@ en:
       new_posts:
         one: "there is 1 new post in this topic since you last read it"
         other: "there are {{count}} new posts in this topic since you last read it"
-
       likes:
         one: "there is 1 like in this topic"
         other: "there are {{count}} likes in this topic"

config/locales/server.en.yml

@@ -1849,7 +1849,10 @@ en:
       subject_template: "Downloading remote images disabled"
       text_body_template: "The `download_remote_images_to_local` setting was disabled because the disk space limit at `download_remote_images_threshold` was reached."
 
-  unsubscribe_link: "To unsubscribe from these emails, visit your [user preferences](%{user_preferences_url})."
+  unsubscribe_link: |
+    To unsubscribe from these emails, visit your [user preferences](%{user_preferences_url}).
+
+    To stop receiving notifications about this particular topic, [click here](%{unsubscribe_url}).
 
   subject_re: "Re: "
   subject_pm: "[PM] "

config/routes.rb

@@ -434,10 +434,12 @@ Discourse::Application.routes.draw do
   # Topic routes
   get "t/id_for/:slug" => "topics#id_for_slug"
   get "t/:slug/:topic_id/wordpress" => "topics#wordpress", constraints: {topic_id: /\d+/}
-  get "t/:slug/:topic_id/moderator-liked" => "topics#moderator_liked", constraints: {topic_id: /\d+/}
   get "t/:topic_id/wordpress" => "topics#wordpress", constraints: {topic_id: /\d+/}
-  get "t/:slug/:topic_id/summary" => "topics#show", defaults: {summary: true}, constraints: {topic_id: /\d+/, post_number: /\d+/}
+  get "t/:slug/:topic_id/moderator-liked" => "topics#moderator_liked", constraints: {topic_id: /\d+/}
-  get "t/:topic_id/summary" => "topics#show", constraints: {topic_id: /\d+/, post_number: /\d+/}
+  get "t/:slug/:topic_id/summary" => "topics#show", defaults: {summary: true}, constraints: {topic_id: /\d+/}
+  get "t/:slug/:topic_id/unsubscribe" => "topics#unsubscribe", constraints: {topic_id: /\d+/}
+  get "t/:topic_id/unsubscribe" => "topics#unsubscribe", constraints: {topic_id: /\d+/}
+  get "t/:topic_id/summary" => "topics#show", constraints: {topic_id: /\d+/}
   put "t/:slug/:topic_id" => "topics#update", constraints: {topic_id: /\d+/}
   put "t/:slug/:topic_id/star" => "topics#star", constraints: {topic_id: /\d+/}
   put "t/:topic_id/star" => "topics#star", constraints: {topic_id: /\d+/}

lib/email/message_builder.rb

@@ -21,16 +21,17 @@ module Email
       @to = to
       @opts = opts || {}
 
-      @template_args = {site_name: SiteSetting.email_prefix.presence || SiteSetting.title,
+      @template_args = {
+        site_name: SiteSetting.email_prefix.presence || SiteSetting.title,
         base_url: Discourse.base_url,
-                        user_preferences_url: "#{Discourse.base_url}/my/preferences" }.merge!(@opts)
+        user_preferences_url: "#{Discourse.base_url}/my/preferences",
+      }.merge!(@opts)
 
       if @template_args[:url].present?
         if @opts[:include_respond_instructions] == false
           @template_args[:respond_instructions] = ''
         else
-          @template_args[:respond_instructions] =
+          @template_args[:respond_instructions] = if allow_reply_by_email?
-            if allow_reply_by_email?
             I18n.t('user_notifications.reply_by_email', @template_args)
           else
             I18n.t('user_notifications.visit_link_to_respond', @template_args)
@@ -56,8 +57,8 @@ module Email
 
     def html_part
       return unless html_override = @opts[:html_override]
-      if @opts[:add_unsubscribe_link]
 
+      if @opts[:add_unsubscribe_link]
         if response_instructions = @template_args[:respond_instructions]
           respond_instructions = PrettyText.cook(response_instructions).html_safe
           html_override.gsub!("%{respond_instructions}", respond_instructions)

spec/components/email/message_builder_spec.rb

@@ -168,7 +168,8 @@ describe Email::MessageBuilder do
 
       let(:message_with_unsubscribe) { Email::MessageBuilder.new(to_address,
                                                                 body: 'hello world',
-                                                                add_unsubscribe_link: true) }
+                                                                add_unsubscribe_link: true,
+                                                                unsubscribe_url: "/t/1234/unsubscribe") }
 
       it "has an List-Unsubscribe header" do
         expect(message_with_unsubscribe.header_args['List-Unsubscribe']).to be_present