Expose status language via og:locale (#34012)

app/views/statuses/show.html.haml

@@ -12,6 +12,8 @@
   = opengraph 'og:title', "#{display_name(@account)} (#{acct(@account)})"
   = opengraph 'og:url', short_account_status_url(@account, @status)
   = opengraph 'og:published_time', @status.created_at.iso8601
+  - if @status.language.present?
+    = opengraph 'og:locale', @status.language
   = opengraph 'profile:username', acct(@account)[1..]
 
   = render 'og_description', activity: @status

spec/requests/status_show_page_spec.rb

@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Statuses' do
+  describe 'GET /@:account_username/:id' do
+    include AccountsHelper
+
+    def site_hostname
+      Rails.configuration.x.web_domain || Rails.configuration.x.local_domain
+    end
+
+    it 'has valid opengraph tags' do
+      account = Fabricate(:account, username: 'alice', display_name: 'Alice')
+      status = Fabricate(:status, account: account, text: 'Hello World')
+
+      get "/@#{account.username}/#{status.id}"
+
+      expect(head_link_icons.size).to eq(3) # Three favicons with sizes
+
+      expect(head_meta_content('og:title')).to match "#{display_name(account)} (#{acct(account)})"
+      expect(head_meta_content('og:type')).to eq 'article'
+      expect(head_meta_content('og:published_time')).to eq status.created_at.iso8601
+      expect(head_meta_content('og:url')).to eq short_account_status_url(account_username: account.username, id: status.id)
+      expect(head_meta_exists('og:locale')).to be false
+    end
+
+    it 'has og:locale opengraph tag if the status has is written in a given language' do
+      status_text = "Una prova d'estatus català"
+      account = Fabricate(:account, username: 'alice', display_name: 'Alice')
+      status = Fabricate(:status, account: account, text: status_text, language: 'ca')
+
+      get "/@#{account.username}/#{status.id}"
+
+      expect(head_meta_content('og:title')).to match "#{display_name(account)} (#{acct(account)})"
+      expect(head_meta_content('og:type')).to eq 'article'
+      expect(head_meta_content('og:published_time')).to eq status.created_at.iso8601
+      expect(head_meta_content('og:url')).to eq short_account_status_url(account_username: account.username, id: status.id)
+
+      expect(head_meta_exists('og:locale')).to be true
+      expect(head_meta_content('og:locale')).to eq 'ca'
+      expect(head_meta_content('og:description')).to eq status_text
+    end
+
+    def head_link_icons
+      response
+        .parsed_body
+        .search('html head link[rel=icon]')
+    end
+
+    def head_meta_content(property)
+      response
+        .parsed_body
+        .search("html head meta[property='#{property}']")
+        .attr('content')
+        .text
+    end
+
+    def head_meta_exists(property)
+      !response
+        .parsed_body
+        .search("html head meta[property='#{property}']")
+        .empty?
+    end
+  end
+end