Add FASP account search support (#34033)

app/workers/fasp/account_search_worker.rb

@@ -0,0 +1,30 @@
+# 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?
+
+    async_refresh = AsyncRefresh.new("fasp:account_search:#{Digest::MD5.base64digest(query)}")
+
+    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?
+
+        account = fetch_service.call(uri)
+        async_refresh.increment_result_count(by: 1) if account.present?
+      end
+    end
+  ensure
+    async_refresh&.finish!
+  end
+end