Change to treat the url to a account already owned as an internal link

app/javascript/mastodon/components/status_content.js

@@ -9,6 +9,7 @@ import Icon from 'mastodon/components/icon';
 import { autoPlayGif, show_reply_tree_button } from 'mastodon/initial_state';
 
 const messages = defineMessages({
+  linkToAcct: { id: 'status.link_to_acct', defaultMessage: 'Link to @{acct}' },
   postByAcct: { id: 'status.post_by_acct', defaultMessage: 'Post by @{acct}' },
 });
 
@@ -64,6 +65,9 @@ export default class StatusContent extends React.PureComponent {
         link.setAttribute('title', mention.get('acct'));
       } else if (link.textContent[0] === '#' || (link.previousSibling && link.previousSibling.textContent && link.previousSibling.textContent[link.previousSibling.textContent.length - 1] === '#')) {
         link.addEventListener('click', this.onHashtagClick.bind(this, link.text), false);
+      } else if (link.classList.contains('account-url-link')) {
+        link.setAttribute('title', this.props.intl.formatMessage(messages.linkToAcct, { acct: link.dataset.accountAcct }));
+        link.addEventListener('click', this.onAccountUrlClick.bind(this, link.dataset.accountId, link.dataset.accountActorType), false);
       } else if (link.classList.contains('status-url-link')) {
         link.setAttribute('title', this.props.intl.formatMessage(messages.postByAcct, { acct: link.dataset.statusAccountAcct }));
         link.addEventListener('click', this.onStatusUrlClick.bind(this, link.dataset.statusId), false);
@@ -146,6 +150,13 @@ export default class StatusContent extends React.PureComponent {
     }
   }
 
+  onAccountUrlClick = (accountId, accountActorType, e) => {
+    if (this.context.router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
+      e.preventDefault();
+      this.context.router.history.push(`${accountActorType == 'Group' ? '/timelines/groups/' : '/accounts/'}${accountId}`);
+    }
+  }
+
   onStatusUrlClick = (statusId, e) => {
     if (this.context.router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
       e.preventDefault();

app/javascript/mastodon/locales/en.json

@@ -500,6 +500,7 @@
   "status.emoji_reaction": "Emoji reaction",
   "status.favourite": "Favourite",
   "status.filtered": "Filtered",
+  "status.link_to_acct": "Link to @{acct}",
   "status.load_more": "Load more",
   "status.media_hidden": "Media hidden",
   "status.mention": "Mention @{name}",

app/javascript/mastodon/locales/ja.json

@@ -501,6 +501,7 @@
   "status.emoji_reaction": "絵文字リアクション",
   "status.favourite": "お気に入り",
   "status.filtered": "フィルターされました",
+  "status.link_to_acct": "@{acct}へのリンク",
   "status.load_more": "もっと見る",
   "status.media_hidden": "非表示のメディア",
   "status.mention": "@{name}さんに投稿",

app/lib/entity_cache.rb

@@ -35,6 +35,30 @@ class EntityCache
     shortcodes.filter_map { |shortcode| cached[to_key(:emoji, shortcode, domain)] || uncached[shortcode] }
   end
 
+  def holding_account(url)
+    return Rails.cache.read(to_key(:holding_account, url)) if Rails.cache.exist?(to_key(:holding_account, url))
+
+    account = begin
+      if ActivityPub::TagManager.instance.local_uri?(url)
+        recognized_params = Rails.application.routes.recognize_path(url)
+
+        return nil unless recognized_params[:action] == 'show'
+
+        if recognized_params[:controller] == 'accounts'
+          Account.find_local(recognized_params[:username])
+        end
+      else
+        Account.where(uri: url).or(Account.where(url: url)).first
+      end
+    rescue ActiveRecord::RecordNotFound
+      nil
+    end
+
+    Rails.cache.write(to_key(:holding_account, url), account, expires_in: account.nil? ? MIN_EXPIRATION : MAX_EXPIRATION)
+
+    account
+  end
+
   def holding_status_and_account(url)
     return Rails.cache.read(to_key(:holding_status, url)) if Rails.cache.exist?(to_key(:holding_status, url))
 

app/lib/formatter.rb

@@ -243,6 +243,10 @@ class Formatter
     Extractor.remove_overlapping_entities(special + standard + extra)
   end
 
+  def class_append(c, items)
+    (c || '').split.concat(items).uniq.join(' ')
+  end
+
   def link_to_url(entity, options = {})
     url        = Addressable::URI.parse(entity[:url])
     html_attrs = { target: '_blank', rel: 'nofollow noopener noreferrer' }
@@ -250,11 +254,17 @@ class Formatter
     html_attrs[:rel] = "me #{html_attrs[:rel]}" if options[:me]
 
     status, account = url_to_holding_status_and_account(url.normalize.to_s)
+    account         = url_to_holding_account(url.normalize.to_s) if status.nil?
 
-    if account.present?
-      html_attrs[:class] = 'status-url-link'
-      html_attrs[:'data-status-id'] = status.id
+    if status.present? && account.present?
+      html_attrs[:class]                      = class_append(html_attrs[:class], ['status-url-link'])
+      html_attrs[:'data-status-id']           = status.id
       html_attrs[:'data-status-account-acct'] = account.acct
+    elsif account.present?
+      html_attrs[:class]                     = class_append(html_attrs[:class], ['account-url-link'])
+      html_attrs[:'data-account-id']         = account.id
+      html_attrs[:'data-account-actor-type'] = account.actor_type
+      html_attrs[:'data-account-acct']       = account.acct
     end
 
     Twitter::TwitterText::Autolink.send(:link_to_text, entity, link_html(entity[:url]), url, html_attrs)
@@ -266,17 +276,31 @@ class Formatter
     doc = Nokogiri::HTML.parse(html, nil, 'utf-8')
     doc.css('a').map do |x|
       status, account = url_to_holding_status_and_account(x['href'])
+      account         = url_to_holding_account(x['href']) if status.nil?
 
-      if account.present?
+      if status.present? && account.present?
         x.add_class('status-url-link')
-        x['data-status-id'] = status.id
+        x['data-status-id']           = status.id
         x['data-status-account-acct'] = account.acct
+      elsif account.present?
+        x.add_class('account-url-link')
+        x['data-account-id']         = account.id
+        x['data-account-actor-type'] = account.actor_type
+        x['data-account-acct']       = account.acct
       end
     end
     html = doc.css('body')[0]&.inner_html || ''
     html.html_safe # rubocop:disable Rails/OutputSafety
   end
 
+  def url_to_holding_account(url)
+    url = url.split('#').first
+
+    return if url.nil?
+
+    EntityCache.instance.holding_account(url)
+  end
+
   def url_to_holding_status_and_account(url)
     url = url.split('#').first