Gab Social. All are welcome.

app/services/process_mentions_service.rb

@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+class ProcessMentionsService < BaseService
+  include StreamEntryRenderer
+
+  # Scan status for mentions and fetch remote mentioned users, create
+  # local mention pointers, send Salmon notifications to mentioned
+  # remote users
+  # @param [Status] status
+  def call(status)
+    return unless status.local?
+
+    @status  = status
+    mentions = []
+
+    status.text = status.text.gsub(Account::MENTION_RE) do |match|
+      username, domain  = Regexp.last_match(1).split('@')
+      mentioned_account = Account.find_remote(username, domain)
+
+      if mention_undeliverable?(mentioned_account)
+        begin
+          mentioned_account = resolve_account_service.call(Regexp.last_match(1))
+        rescue Goldfinger::Error, HTTP::Error, OpenSSL::SSL::SSLError, GabSocial::UnexpectedResponseError
+          mentioned_account = nil
+        end
+      end
+
+      next match if mention_undeliverable?(mentioned_account) || mentioned_account&.suspended?
+
+      mentions << mentioned_account.mentions.where(status: status).first_or_create(status: status)
+
+      "@#{mentioned_account.acct}"
+    end
+
+    status.save!
+
+    mentions.each { |mention| create_notification(mention) }
+  end
+
+  private
+
+  def mention_undeliverable?(mentioned_account)
+    mentioned_account.nil? || (!mentioned_account.local? && mentioned_account.ostatus? && @status.stream_entry.hidden?)
+  end
+
+  def create_notification(mention)
+    mentioned_account = mention.account
+
+    if mentioned_account.local?
+      LocalNotificationWorker.perform_async(mentioned_account.id, mention.id, mention.class.name)
+    elsif mentioned_account.ostatus? && !@status.stream_entry.hidden?
+      NotificationWorker.perform_async(ostatus_xml, @status.account_id, mentioned_account.id)
+    elsif mentioned_account.activitypub?
+      ActivityPub::DeliveryWorker.perform_async(activitypub_json, mention.status.account_id, mentioned_account.inbox_url)
+    end
+  end
+
+  def ostatus_xml
+    @ostatus_xml ||= stream_entry_to_xml(@status.stream_entry)
+  end
+
+  def activitypub_json
+    return @activitypub_json if defined?(@activitypub_json)
+    payload = ActiveModelSerializers::SerializableResource.new(
+      @status,
+      serializer: ActivityPub::ActivitySerializer,
+      adapter: ActivityPub::Adapter
+    ).as_json
+    @activitypub_json = Oj.dump(@status.distributable? ? ActivityPub::LinkedDataSignature.new(payload).sign!(@status.account) : payload)
+  end
+
+  def resolve_account_service
+    ResolveAccountService.new
+  end
+end