Add trending links (#16917)

* Add trending links

* Add overriding specific links trendability

* Add link type to preview cards and only trend articles

Change trends review notifications from being sent every 5 minutes to being sent every 2 hours

Change threshold from 5 unique accounts to 15 unique accounts

* Fix tests

3 files changed, 97 insertions, 88 deletions

diff --git a/app/helpers/admin/filter_helper.rb b/app/helpers/admin/filter_helper.rb
index ba0ca9638..5f69f176a 100644
--- a/app/helpers/admin/filter_helper.rb
+++ b/app/helpers/admin/filter_helper.rb
@@ -6,6 +6,8 @@ module Admin::FilterHelper
     CustomEmojiFilter::KEYS,
     ReportFilter::KEYS,
     TagFilter::KEYS,
+    PreviewCardProviderFilter::KEYS,
+    PreviewCardFilter::KEYS,
     InstanceFilter::KEYS,
     InviteFilter::KEYS,
     RelationshipFilter::KEYS,
diff --git a/app/helpers/languages_helper.rb b/app/helpers/languages_helper.rb
new file mode 100644
index 000000000..730724208
--- /dev/null
+++ b/app/helpers/languages_helper.rb
@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+
+module LanguagesHelper
+  HUMAN_LOCALES = {
+    af: 'Afrikaans',
+    ar: 'العربية',
+    ast: 'Asturianu',
+    bg: 'Български',
+    bn: 'বাংলা',
+    br: 'Breton',
+    ca: 'Català',
+    co: 'Corsu',
+    cs: 'Čeština',
+    cy: 'Cymraeg',
+    da: 'Dansk',
+    de: 'Deutsch',
+    el: 'Ελληνικά',
+    en: 'English',
+    eo: 'Esperanto',
+    'es-AR': 'Español (Argentina)',
+    'es-MX': 'Español (México)',
+    es: 'Español',
+    et: 'Eesti',
+    eu: 'Euskara',
+    fa: 'فارسی',
+    fi: 'Suomi',
+    fr: 'Français',
+    ga: 'Gaeilge',
+    gd: 'Gàidhlig',
+    gl: 'Galego',
+    he: 'עברית',
+    hi: 'हिन्दी',
+    hr: 'Hrvatski',
+    hu: 'Magyar',
+    hy: 'Հայերեն',
+    id: 'Bahasa Indonesia',
+    io: 'Ido',
+    is: 'Íslenska',
+    it: 'Italiano',
+    ja: '日本語',
+    ka: 'ქართული',
+    kab: 'Taqbaylit',
+    kk: 'Қазақша',
+    kmr: 'Kurmancî',
+    kn: 'ಕನ್ನಡ',
+    ko: '한국어',
+    ku: 'سۆرانی',
+    lt: 'Lietuvių',
+    lv: 'Latviešu',
+    mk: 'Македонски',
+    ml: 'മലയാളം',
+    mr: 'मराठी',
+    ms: 'Bahasa Melayu',
+    nl: 'Nederlands',
+    nn: 'Nynorsk',
+    no: 'Norsk',
+    oc: 'Occitan',
+    pl: 'Polski',
+    'pt-BR': 'Português (Brasil)',
+    'pt-PT': 'Português (Portugal)',
+    pt: 'Português',
+    ro: 'Română',
+    ru: 'Русский',
+    sa: 'संस्कृतम्',
+    sc: 'Sardu',
+    si: 'සිංහල',
+    sk: 'Slovenčina',
+    sl: 'Slovenščina',
+    sq: 'Shqip',
+    'sr-Latn': 'Srpski (latinica)',
+    sr: 'Српски',
+    sv: 'Svenska',
+    ta: 'தமிழ்',
+    te: 'తెలుగు',
+    th: 'ไทย',
+    tr: 'Türkçe',
+    uk: 'Українська',
+    ur: 'اُردُو',
+    vi: 'Tiếng Việt',
+    zgh: 'ⵜⴰⵎⴰⵣⵉⵖⵜ',
+    'zh-CN': '简体中文',
+    'zh-HK': '繁體中文（香港）',
+    'zh-TW': '繁體中文（臺灣）',
+    zh: '中文',
+  }.freeze
+
+  def human_locale(locale)
+    if locale == 'und'
+      I18n.t('generic.none')
+    else
+      HUMAN_LOCALES[locale.to_sym] || locale
+    end
+  end
+end
diff --git a/app/helpers/settings_helper.rb b/app/helpers/settings_helper.rb
index ac4c18746..23739d1cd 100644
--- a/app/helpers/settings_helper.rb
+++ b/app/helpers/settings_helper.rb
@@ -1,95 +1,8 @@
 # frozen_string_literal: true
 
 module SettingsHelper
-  HUMAN_LOCALES = {
-    af: 'Afrikaans',
-    ar: 'العربية',
-    ast: 'Asturianu',
-    bg: 'Български',
-    bn: 'বাংলা',
-    br: 'Breton',
-    ca: 'Català',
-    co: 'Corsu',
-    cs: 'Čeština',
-    cy: 'Cymraeg',
-    da: 'Dansk',
-    de: 'Deutsch',
-    el: 'Ελληνικά',
-    en: 'English',
-    eo: 'Esperanto',
-    'es-AR': 'Español (Argentina)',
-    'es-MX': 'Español (México)',
-    es: 'Español',
-    et: 'Eesti',
-    eu: 'Euskara',
-    fa: 'فارسی',
-    fi: 'Suomi',
-    fr: 'Français',
-    ga: 'Gaeilge',
-    gd: 'Gàidhlig',
-    gl: 'Galego',
-    he: 'עברית',
-    hi: 'हिन्दी',
-    hr: 'Hrvatski',
-    hu: 'Magyar',
-    hy: 'Հայերեն',
-    id: 'Bahasa Indonesia',
-    io: 'Ido',
-    is: 'Íslenska',
-    it: 'Italiano',
-    ja: '日本語',
-    ka: 'ქართული',
-    kab: 'Taqbaylit',
-    kk: 'Қазақша',
-    kmr: 'Kurmancî',
-    kn: 'ಕನ್ನಡ',
-    ko: '한국어',
-    ku: 'سۆرانی',
-    lt: 'Lietuvių',
-    lv: 'Latviešu',
-    mk: 'Македонски',
-    ml: 'മലയാളം',
-    mr: 'मराठी',
-    ms: 'Bahasa Melayu',
-    nl: 'Nederlands',
-    nn: 'Nynorsk',
-    no: 'Norsk',
-    oc: 'Occitan',
-    pl: 'Polski',
-    'pt-BR': 'Português (Brasil)',
-    'pt-PT': 'Português (Portugal)',
-    pt: 'Português',
-    ro: 'Română',
-    ru: 'Русский',
-    sa: 'संस्कृतम्',
-    sc: 'Sardu',
-    si: 'සිංහල',
-    sk: 'Slovenčina',
-    sl: 'Slovenščina',
-    sq: 'Shqip',
-    'sr-Latn': 'Srpski (latinica)',
-    sr: 'Српски',
-    sv: 'Svenska',
-    ta: 'தமிழ்',
-    te: 'తెలుగు',
-    th: 'ไทย',
-    tr: 'Türkçe',
-    uk: 'Українська',
-    ur: 'اُردُو',
-    vi: 'Tiếng Việt',
-    zgh: 'ⵜⴰⵎⴰⵣⵉⵖⵜ',
-    'zh-CN': '简体中文',
-    'zh-HK': '繁體中文（香港）',
-    'zh-TW': '繁體中文（臺灣）',
-    zh: '中文',
-  }.freeze
-
-  def human_locale(locale)
-    HUMAN_LOCALES[locale]
-  end
-
   def filterable_languages
-    LanguageDetector.instance.language_names.select(&HUMAN_LOCALES.method(:key?))
+    LanguageDetector.instance.language_names.select(&LanguagesHelper::HUMAN_LOCALES.method(:key?))
   end
 
   def hash_to_object(hash)