List the "Watching First Post" tags on preferences

app/assets/javascripts/discourse/models/user.js.es6

@@ -146,39 +146,39 @@ const User = RestModel.extend({
 
   save() {
     const data = this.getProperties(
-            'bio_raw',
-            'website',
-            'location',
-            'name',
-            'locale',
-            'custom_fields',
-            'user_fields',
-            'muted_usernames',
-            'profile_background',
-            'card_background',
-            'muted_tags',
-            'tracked_tags',
-            'watched_tags'
-          );
+      'bio_raw',
+      'website',
+      'location',
+      'name',
+      'locale',
+      'custom_fields',
+      'user_fields',
+      'muted_usernames',
+      'profile_background',
+      'card_background',
+      'muted_tags',
+      'tracked_tags',
+      'watched_tags',
+      'watching_first_post_tags');
 
-    [       'email_always',
-            'mailing_list_mode',
-            'mailing_list_mode_frequency',
-            'external_links_in_new_tab',
-            'email_digests',
-            'email_direct',
-            'email_in_reply_to',
-            'email_private_messages',
-            'email_previous_replies',
-            'dynamic_favicon',
-            'enable_quoting',
-            'disable_jump_reply',
-            'automatically_unpin_topics',
-            'digest_after_minutes',
-            'new_topic_duration_minutes',
-            'auto_track_topics_after_msecs',
-            'like_notification_frequency',
-            'include_tl0_in_digests'
+    ['email_always',
+     'mailing_list_mode',
+     'mailing_list_mode_frequency',
+     'external_links_in_new_tab',
+     'email_digests',
+     'email_direct',
+     'email_in_reply_to',
+     'email_private_messages',
+     'email_previous_replies',
+     'dynamic_favicon',
+     'enable_quoting',
+     'disable_jump_reply',
+     'automatically_unpin_topics',
+     'digest_after_minutes',
+     'new_topic_duration_minutes',
+     'auto_track_topics_after_msecs',
+     'like_notification_frequency',
+     'include_tl0_in_digests'
     ].forEach(s => {
       data[s] = this.get(`user_option.${s}`);
     });

app/assets/javascripts/discourse/templates/user/preferences.hbs

@@ -288,6 +288,11 @@
         {{tag-chooser tags=model.tracked_tags blacklist=selectedTags allowCreate=false placeholder="" everyTag="true" unlimitedTagCount="true"}}
       </div>
       <div class="instructions">{{i18n 'user.tracked_tags_instructions'}}</div>
+      <div class="controls tag-controls">
+        <label><span class="icon fa fa-dot-circle-o watching-first-post"></span> {{i18n 'user.watched_first_post_tags'}}</label>
+        {{tag-chooser tags=model.watching_first_post_tags blacklist=selectedTags allowCreate=false placeholder="" everyTag="true" unlimitedTagCount="true"}}
+      </div>
+      <div class="instructions">{{i18n 'user.watched_first_post_tags_instructions'}}</div>
       <div class="controls tag-controls">
         <label><span class="icon fa fa-times-circle muted"></span> {{i18n 'user.muted_tags'}}</label>
         {{tag-chooser tags=model.muted_tags blacklist=selectedTags allowCreate=false placeholder="" everyTag="true" unlimitedTagCount="true"}}

app/serializers/user_serializer.rb

@@ -84,6 +84,7 @@ class UserSerializer < BasicUserSerializer
   private_attributes :locale,
                      :muted_category_ids,
                      :watched_tags,
+                     :watching_first_post_tags,
                      :tracked_tags,
                      :muted_tags,
                      :tracked_category_ids,
@@ -258,6 +259,10 @@ class UserSerializer < BasicUserSerializer
     TagUser.lookup(object, :tracking).joins(:tag).pluck('tags.name')
   end
 
+  def watching_first_post_tags
+    TagUser.lookup(object, :watching_first_post).joins(:tag).pluck('tags.name')
+  end
+
   def watched_tags
     TagUser.lookup(object, :watching).joins(:tag).pluck('tags.name')
   end

app/services/user_updater.rb

@@ -8,6 +8,7 @@ class UserUpdater
   }
 
   TAG_NAMES = {
+    watching_first_post_tags: :watching_first_post,
     watched_tags: :watching,
     tracked_tags: :tracking,
     muted_tags: :muted

config/locales/client.en.yml

@@ -553,6 +553,9 @@ en:
       tracked_categories_instructions: "You will automatically track all topics in these categories. A count of new posts will appear next to the topic."
       watched_first_post_categories: "Watching First Post"
       watched_first_post_categories_instructions: "You will be notified of the first post in each new topic in these categories."
+      watched_first_post_tags: "Watching First Post"
+      watched_first_post_tags_instructions: "You will be notified of the first post in each new topic with these tags."
+
       muted_categories: "Muted"
       muted_categories_instructions: "You will not be notified of anything about new topics in these categories, and they will not appear in latest."
       delete_account: "Delete My Account"