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;;; sb-lump.el --- shimbun backend class to check all groups at once
;; Copyright (C) 2001, 2002 Yuuichi Teranishi <teranisi@gohome.org>
;; Author: TSUCHIYA Masatoshi <tsuchiya@namazu.org>,
;; Yuuichi Teranishi <teranisi@gohome.org>
;; Keywords: news
;; This file is a part of shimbun.
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Original code was nnshimbun.el written by
;; TSUCHIYA Masatoshi <tsuchiya@namazu.org>.
;;; Code:
(require 'shimbun)
(defvar shimbun-lump-check-interval 300)
(eval-and-compile
(luna-define-class shimbun-lump (shimbun)
(group-header-alist last-check check-interval))
(luna-define-internal-accessors 'shimbun-lump))
(defsubst shimbun-lump-check-interval (shimbun)
(or (shimbun-lump-check-interval-internal shimbun)
shimbun-lump-check-interval))
(defun shimbun-lump-lapse-seconds (time)
(let ((now (current-time)))
(+ (* (- (car now) (car time)) 65536)
(- (nth 1 now) (nth 1 time)))))
(defun shimbun-lump-check-p (shimbun)
(or (null (shimbun-lump-last-check-internal shimbun))
(and (shimbun-lump-last-check-internal shimbun)
(> (shimbun-lump-lapse-seconds
(shimbun-lump-last-check-internal shimbun))
(shimbun-lump-check-interval shimbun)))))
(defun shimbun-lump-checked (shimbun)
(shimbun-lump-set-last-check-internal shimbun (current-time)))
(luna-define-generic shimbun-get-group-header-alist (shimbun &optional range)
"Return an alist of group and header list.")
(luna-define-method shimbun-headers ((shimbun shimbun-lump) &optional range)
(when (shimbun-lump-check-p shimbun)
(shimbun-lump-set-group-header-alist-internal
shimbun (shimbun-get-group-header-alist shimbun range))
(shimbun-lump-checked shimbun))
(cdr (assoc (shimbun-current-group-internal shimbun)
(shimbun-lump-group-header-alist-internal shimbun))))
(luna-define-method shimbun-close :after ((shimbun shimbun-lump))
(shimbun-lump-set-group-header-alist-internal shimbun nil)
(shimbun-lump-set-last-check-internal shimbun nil))
(provide 'sb-lump)
;;; sb-lump.el ends here
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