Send searches to FASP...

...to backfill accounts that might be missing.

Sadly, this has no effect on the search performed, but has the
potential to improvde future searches.

app/services/account_search_service.rb

@@ -152,6 +152,12 @@ class AccountSearchService < BaseService
         'search.backend' => Chewy.enabled? ? 'elasticsearch' : 'database'
       )
 
+      # Trigger searching accounts using providers.
+      # This will not return any immediate results but has the
+      # potential to fill the local database with relevant
+      # accounts for the next time the search is performed.
+      Fasp::AccountSearchWorker.perform_async(@query)
+
       search_service_results.compact.uniq.tap do |results|
         span.set_attribute('search.results.count', results.size)
       end

app/workers/fasp/account_search_worker.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class Fasp::AccountSearchWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: 'fasp', retry: 0
+
+  def perform(query)
+    return unless Mastodon::Feature.fasp_enabled?
+
+    account_search_providers = Fasp::Provider.with_capability('account_search')
+    return if account_search_providers.none?
+
+    params = { term: query, limit: 10 }.to_query
+    fetch_service = ActivityPub::FetchRemoteActorService.new
+
+    account_search_providers.each do |provider|
+      Fasp::Request.new(provider).get("/account_search/v0/search?#{params}").each do |uri|
+        next if Account.where(uri:).any?
+
+        fetch_service.call(uri)
+      end
+    end
+  end
+end