Add missing meta description to profiles, some other SEO stuff (#6706)

- Add missing meta description to profiles
- Add canonical rel link to landing page
- Remove linebreaks from title tags
- Add username to profile title
- Add toots/following/followers to profile description tags
- Add next/prev rel links to profiles
- Do not index follower/following variants of profiles

app/helpers/stream_entries_helper.rb

@@ -8,6 +8,27 @@ module StreamEntriesHelper
     account.display_name.presence || account.username
   end
 
+  def account_description(account)
+    prepend_str = [
+      [
+        number_to_human(account.statuses_count, strip_insignificant_zeros: true),
+        t('accounts.posts'),
+      ].join(' '),
+
+      [
+        number_to_human(account.following_count, strip_insignificant_zeros: true),
+        t('accounts.following'),
+      ].join(' '),
+
+      [
+        number_to_human(account.followers_count, strip_insignificant_zeros: true),
+        t('accounts.followers'),
+      ].join(' '),
+    ].join(', ')
+
+    [prepend_str, account.note].join(' · ')
+  end
+
   def stream_link_target
     embedded_view? ? '_blank' : nil
   end

app/views/about/show.html.haml

@@ -2,6 +2,7 @@
   = site_hostname
 
 - content_for :header_tags do
+  %link{ rel: 'canonical', href: about_url }/
   %script#initial-state{ type: 'application/json' }!= json_escape(@initial_state_json)
   = javascript_pack_tag 'about', integrity: true, crossorigin: 'anonymous'
   = render partial: 'shared/og'

app/views/accounts/_og.html.haml

 = opengraph 'og:url', url
 = opengraph 'og:site_name', site_title
 = opengraph 'og:title', [yield(:page_title).strip.presence, site_title].compact.join(' - ')
-= opengraph 'og:description', account.note
+= opengraph 'og:description', account_description(account)
 = opengraph 'og:image', full_asset_url(account.avatar.url(:original))
 = opengraph 'og:image:width', '120'
 = opengraph 'og:image:height', '120'

app/views/accounts/show.html.haml

 - content_for :page_title do
-  = display_name(@account)
+  = "#{display_name(@account)} (@#{@account.username})"
 
 - content_for :header_tags do
+  %meta{ name: 'description', content: account_description(@account) }/
+
   - if @account.user&.setting_noindex
     %meta{ name: 'robots', content: 'noindex' }/
 
@@ -9,6 +11,11 @@
   %link{ rel: 'alternate', type: 'application/atom+xml', href: account_url(@account, format: 'atom') }/
   %link{ rel: 'alternate', type: 'application/activity+json', href: ActivityPub::TagManager.instance.uri_for(@account) }/
 
+  - if @older_url
+    %link{ rel: 'next', href: @older_url }/
+  - if @newer_url
+    %link{ rel: 'prev', href: @newer_url }/
+
   = opengraph 'og:type', 'profile'
   = render 'og', account: @account, url: short_account_url(@account, only_path: false)
 
@@ -42,6 +49,6 @@
   - if @newer_url || @older_url
     .pagination
       - if @older_url
-        = link_to safe_join([fa_icon('chevron-left'), t('pagination.older')], ' '), @older_url, class: 'older', rel: 'older'
+        = link_to safe_join([fa_icon('chevron-left'), t('pagination.older')], ' '), @older_url, class: 'older', rel: 'next'
       - if @newer_url
-        = link_to safe_join([t('pagination.newer'), fa_icon('chevron-right')], ' '), @newer_url, class: 'newer', rel: 'newer'
+        = link_to safe_join([t('pagination.newer'), fa_icon('chevron-right')], ' '), @newer_url, class: 'newer', rel: 'prev'

app/views/follower_accounts/index.html.haml

@@ -2,9 +2,7 @@
   = t('accounts.people_who_follow', name: display_name(@account))
 
 - content_for :header_tags do
-  - if @account.user&.setting_noindex
-    %meta{ name: 'robots', content: 'noindex' }/
-
+  %meta{ name: 'robots', content: 'noindex' }/
   = render 'accounts/og', account: @account, url: account_followers_url(@account, only_path: false)
 
 = render 'accounts/header', account: @account

app/views/following_accounts/index.html.haml

@@ -2,9 +2,7 @@
   = t('accounts.people_followed_by', name: display_name(@account))
 
 - content_for :header_tags do
-  - if @account.user&.setting_noindex
-    %meta{ name: 'robots', content: 'noindex' }/
-
+  %meta{ name: 'robots', content: 'noindex' }/
   = render 'accounts/og', account: @account, url: account_followers_url(@account, only_path: false)
 
 = render 'accounts/header', account: @account

app/views/layouts/application.html.haml

@@ -2,7 +2,7 @@
 %html{ lang: I18n.locale }
   %head
     %meta{ charset: 'utf-8' }/
-    %meta{ name: 'viewport', content: 'width=device-width, initial-scale=1' }/   
+    %meta{ name: 'viewport', content: 'width=device-width, initial-scale=1' }/
     %link{ rel: 'icon', href: favicon_path, type: 'image/x-icon' }/
     %link{ rel: 'apple-touch-icon', sizes: '180x180', href: '/apple-touch-icon.png' }/
     %link{ rel: 'mask-icon', href: '/mask-icon.svg', color: '#2B90D9' }/
@@ -11,11 +11,7 @@
     %meta{ name: 'theme-color', content: '#282c37' }/
     %meta{ name: 'apple-mobile-web-app-capable', content: 'yes' }/
 
-    %title<
-      - if content_for?(:page_title)
-        = yield(:page_title)
-        = ' - '
-      = title
+    %title= content_for?(:page_title) ? safe_join([yield(:page_title).chomp, ' - ', title]) : title
 
     = stylesheet_pack_tag 'common', media: 'all'
     = stylesheet_pack_tag current_theme, media: 'all'