Add scheduled statuses (#9706)

Fix #340

app/workers/publish_scheduled_status_worker.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class PublishScheduledStatusWorker
+  include Sidekiq::Worker
+
+  def perform(scheduled_status_id)
+    scheduled_status = ScheduledStatus.find(scheduled_status_id)
+    scheduled_status.destroy!
+
+    PostStatusService.new.call(
+      scheduled_status.account,
+      options_with_objects(scheduled_status.params.with_indifferent_access)
+    )
+  rescue ActiveRecord::RecordNotFound, ActiveRecord::RecordInvalid
+    true
+  end
+
+  def options_with_objects(options)
+    options.tap do |options_hash|
+      options_hash[:application] = Doorkeeper::Application.find(options_hash.delete(:application_id)) if options[:application_id]
+      options_hash[:thread]      = Status.find(options_hash.delete(:in_reply_to_status_id)) if options_hash[:in_reply_to_status_id]
+    end
+  end
+end

app/workers/scheduler/scheduled_statuses_scheduler.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class Scheduler::ScheduledStatusesScheduler
+  include Sidekiq::Worker
+
+  sidekiq_options unique: :until_executed, retry: 0
+
+  def perform
+    due_statuses.find_each do |scheduled_status|
+      PublishScheduledStatusWorker.perform_at(scheduled_status.scheduled_at)
+    end
+  end
+
+  private
+
+  def due_statuses
+    ScheduledStatus.where('scheduled_at <= ?', Time.now.utc + PostStatusService::MIN_SCHEDULE_OFFSET)
+  end
+end