FIX: 🈂️ Allow closing polls in multi-locale sites

app/controllers/application_controller.rb

@@ -147,8 +147,8 @@ class ApplicationController < ActionController::Base
   end
 
   def set_locale
-    I18n.locale = if SiteSetting.allow_user_locale && current_user && current_user.locale.present?
+    I18n.locale = if current_user
-                    current_user.locale
+                    current_user.effective_locale
                   else
                     SiteSetting.default_locale
                   end

app/models/user.rb

@@ -138,6 +138,14 @@ class User < ActiveRecord::Base
     User.where(username_lower: lower).blank?
   end
 
+  def effective_locale
+    if SiteSetting.allow_user_locale && self.locale.present?
+      self.locale
+    else
+      SiteSetting.default_locale
+    end
+  end
+
   EMAIL = %r{([^@]+)@([^\.]+)}
 
   def self.new_from_params(params)

app/services/post_alerter.rb

@@ -118,11 +118,7 @@ class PostAlerter
     if collapsed
       post = first_unread_post(user,post.topic) || post
       count = unread_count(user, post.topic)
-      I18n.with_locale(if SiteSetting.allow_user_locale && user.locale.present?
+      I18n.with_locale(user.effective_locale) do
-                         user.locale
-                       else
-                         SiteSetting.default_locale
-                       end) do
         opts[:display_username] = I18n.t('embed.replies', count: count) if count > 1
       end
     end

plugins/poll/README.md

@@ -9,7 +9,7 @@ Allows you to add a poll to the first post of a topic.
 
 ## Closing the poll
 
-Change the start of the topic title from "Poll: " to "Closed Poll: ". This feature is disabled if the `allow_user_locale` site setting is enabled.
+Change the start of the topic title from "Poll: " to "Closed Poll: ". This feature uses the locale of the user who started the topic.
 
 _Note: closing a topic will also close the poll._
 

plugins/poll/assets/javascripts/controllers/poll.js.es6

@@ -5,7 +5,7 @@ export default DiscourseController.extend({
   showResults: Em.computed.oneWay('poll.closed'),
   disableRadio: Em.computed.any('poll.closed', 'loading'),
   showToggleClosePoll: function() {
-    return this.get('poll.post.topic.details.can_edit') && !Discourse.SiteSettings.allow_user_locale;
+    return this.get('poll.post.topic.details.can_edit');
   }.property('poll.post.topic.details.can_edit'),
 
   actions: {

plugins/poll/plugin.rb

@@ -80,11 +80,13 @@ after_initialize do
         end
 
         # Modify topic title.
+        I18n.with_locale(topic.user.effective_locale) do
           if topic.title =~ /^(#{I18n.t('poll.prefix').strip})\s?:/i
             topic.title = topic.title.gsub(/^(#{I18n.t('poll.prefix').strip})\s?:/i, I18n.t('poll.closed_prefix') + ':')
           elsif topic.title =~ /^(#{I18n.t('poll.closed_prefix').strip})\s?:/i
             topic.title = topic.title.gsub(/^(#{I18n.t('poll.closed_prefix').strip})\s?:/i, I18n.t('poll.prefix') + ':')
           end
+        end
 
         topic.acting_user = current_user
         topic.save!

plugins/poll/poll.rb

@@ -21,20 +21,14 @@ module ::PollPlugin
         return false
       end
 
+      I18n.with_locale(topic.user.effective_locale) do
         topic.title =~ /^(#{I18n.t('poll.prefix').strip}|#{I18n.t('poll.closed_prefix').strip})\s?:/i
       end
+    end
 
     def has_poll_details?
-      if SiteSetting.allow_user_locale?
-        # If we allow users to select their locale of choice we cannot detect polls
-        # by the prefix, so we fall back to checking if the poll details is set in
-        # places to make sure polls are still accessible by users using a different
-        # locale than the one used by the topic creator.
-        not self.details.nil?
-      else
       self.is_poll?
     end
-    end
 
     # Called during validation of poll posts. Discourse already restricts edits to
     # the OP and staff, we want to make sure that:
@@ -60,7 +54,8 @@ module ::PollPlugin
     end
 
     def is_closed?
-      @post.topic.closed? || @post.topic.archived? || (!SiteSetting.allow_user_locale? && (@post.topic.title =~ /^#{I18n.t('poll.closed_prefix')}/i) === 0)
+      topic = @post.topic
+      topic.closed? || topic.archived? || (topic.title =~ /^#{I18n.t('poll.closed_prefix', locale: topic.user.effective_locale)}/i) === 0
     end
 
     def options