Gab Social. All are welcome.

app/workers/scheduler/feed_cleanup_scheduler.rb

@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+class Scheduler::FeedCleanupScheduler
+  include Sidekiq::Worker
+  include Redisable
+
+  sidekiq_options unique: :until_executed, retry: 0
+
+  def perform
+    clean_home_feeds!
+    clean_list_feeds!
+  end
+
+  private
+
+  def clean_home_feeds!
+    clean_feeds!(inactive_account_ids, :home)
+  end
+
+  def clean_list_feeds!
+    clean_feeds!(inactive_list_ids, :list)
+  end
+
+  def clean_feeds!(ids, type)
+    reblogged_id_sets = {}
+
+    redis.pipelined do
+      ids.each do |feed_id|
+        redis.del(feed_manager.key(type, feed_id))
+        reblog_key = feed_manager.key(type, feed_id, 'reblogs')
+        # We collect a future for this: we don't block while getting
+        # it, but we can iterate over it later.
+        reblogged_id_sets[feed_id] = redis.zrange(reblog_key, 0, -1)
+        redis.del(reblog_key)
+      end
+    end
+
+    # Remove all of the reblog tracking keys we just removed the
+    # references to.
+    redis.pipelined do
+      reblogged_id_sets.each do |feed_id, future|
+        future.value.each do |reblogged_id|
+          reblog_set_key = feed_manager.key(type, feed_id, "reblogs:#{reblogged_id}")
+          redis.del(reblog_set_key)
+        end
+      end
+    end
+  end
+
+  def inactive_account_ids
+    @inactive_account_ids ||= User.confirmed.inactive.pluck(:account_id)
+  end
+
+  def inactive_list_ids
+    List.where(account_id: inactive_account_ids).pluck(:id)
+  end
+
+  def feed_manager
+    FeedManager.instance
+  end
+end