Add domain search prefix

app/javascript/mastodon/features/compose/components/search.jsx

@@ -50,6 +50,7 @@ class Search extends PureComponent {
     { label: <><mark>is:</mark> <FormattedList type='disjunction' value={['reply', 'sensitive']} /></>, action: e => { e.preventDefault(); this._insertText('is:') } },
     { label: <><mark>language:</mark> <FormattedMessage id='search_popout.language_code' defaultMessage='ISO language code' /></>, action: e => { e.preventDefault(); this._insertText('language:') } },
     { label: <><mark>from:</mark> <FormattedMessage id='search_popout.user' defaultMessage='user' /></>, action: e => { e.preventDefault(); this._insertText('from:') } },
+    { label: <><mark>domain:</mark> <FormattedMessage id='search_popout.domain' defaultMessage='domain' /></>, action: e => { e.preventDefault(); this._insertText('domain:') } },
     { label: <><mark>before:</mark> <FormattedMessage id='search_popout.specific_date' defaultMessage='specific date' /></>, action: e => { e.preventDefault(); this._insertText('before:') } },
     { label: <><mark>during:</mark> <FormattedMessage id='search_popout.specific_date' defaultMessage='specific date' /></>, action: e => { e.preventDefault(); this._insertText('during:') } },
     { label: <><mark>after:</mark> <FormattedMessage id='search_popout.specific_date' defaultMessage='specific date' /></>, action: e => { e.preventDefault(); this._insertText('after:') } },

app/lib/search_query_transformer.rb

@@ -103,6 +103,10 @@ class SearchQueryTransformer < Parslet::Transform
         @filter = :account_id
         @type = :term
         @term = account_id_from_term(term)
+      when 'domain'
+        @filter = :domain
+        @type = :term
+        @term = domain_from_term(term)
       when 'before'
         @filter = :created_at
         @type = :range
@@ -137,6 +141,12 @@ class SearchQueryTransformer < Parslet::Transform
       # an ID that does not exist
       account&.id || -1
     end
+
+    def domain_from_term(term)
+      return '' if %w(local me).include?(term)
+
+      term
+    end
   end
 
   rule(clause: subtree(:clause)) do