class Sidekiq::Queue

def self.all
  Sidekiq.redis {|c| c.smembers('queues') }.map {|q| Sidekiq::Queue.new(q) }
end

def clear
  Sidekiq.redis do |conn|
    conn.multi do
      conn.del(@rname)
      conn.srem("queues", name)
    end
  end
end

def each(&block)
  initial_size = size
  deleted_size = 0
  page = 0
  page_size = 50
  loop do
    range_start = page * page_size - deleted_size
    range_end   = page * page_size - deleted_size + (page_size - 1)
    entries = Sidekiq.redis do |conn|
      conn.lrange @rname, range_start, range_end
    end
    break if entries.empty?
    page += 1
    entries.each do |entry|
      block.call Job.new(entry, @name)
    end
    deleted_size = initial_size - size
  end
end

def find_job(jid)
  self.detect { |j| j.jid == jid }
end

def initialize(name="default")
  @name = name
  @rname = "queue:#{name}"
end

def latency
  entry = Sidekiq.redis do |conn|
    conn.lrange(@rname, -1, -1)
  end.first
  return 0 unless entry
  Time.now.to_f - Sidekiq.load_json(entry)['enqueued_at']
end

def size
  Sidekiq.redis { |con| con.llen(@rname) }
end