Module: Sidekiq::Paginator

Defined in:
lib/sidekiq/paginator.rb

Instance Method Summary collapse

Instance Method Details

#page(key, pageidx = 1, page_size = 25, opts = nil) ⇒ Object


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# File 'lib/sidekiq/paginator.rb', line 5

def page(key, pageidx = 1, page_size = 25, opts = nil)
  current_page = pageidx.to_i < 1 ? 1 : pageidx.to_i
  pageidx = current_page - 1
  total_size = 0
  items = []
  starting = pageidx * page_size
  ending = starting + page_size - 1

  Sidekiq.redis do |conn|
    type = conn.type(key)
    rev = opts && opts[:reverse]

    case type
    when "zset"
      total_size, items = conn.multi {
        conn.zcard(key)
        if rev
          conn.zrevrange(key, starting, ending, with_scores: true)
        else
          conn.zrange(key, starting, ending, with_scores: true)
        end
      }
      [current_page, total_size, items]
    when "list"
      total_size, items = conn.multi {
        conn.llen(key)
        if rev
          conn.lrange(key, -ending - 1, -starting - 1)
        else
          conn.lrange(key, starting, ending)
        end
      }
      items.reverse! if rev
      [current_page, total_size, items]
    when "none"
      [1, 0, []]
    else
      raise "can't page a #{type}"
    end
  end
end