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1590 lines
54 KiB
EmacsLisp
1590 lines
54 KiB
EmacsLisp
;;; nndiary.el --- A diary back end for Gnus
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;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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;; Author: Didier Verna <didier@xemacs.org>
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;; Maintainer: Didier Verna <didier@xemacs.org>
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;; Created: Fri Jul 16 18:55:42 1999
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;; Keywords: calendar mail news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Contents management by FCM version 0.1.
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;; Description:
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;; ===========
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;; nndiary is a mail back end designed to handle mails as diary event
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;; reminders. It is now fully documented in the Gnus manual.
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;; Bugs / Todo:
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;; ===========
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;; * Respooling doesn't work because contrary to the request-scan function,
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;; Gnus won't allow me to override the split methods when calling the
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;; respooling back end functions.
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;; * There's a bug in the time zone mechanism with variable TZ locations.
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;; * We could allow a keyword like `ask' in X-Diary-* headers, that would mean
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;; "ask for value upon reception of the message".
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;; * We could add an optional header X-Diary-Reminders to specify a special
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;; reminders value for this message. Suggested by Jody Klymak.
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;; * We should check messages validity in other circumstances than just
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;; moving an article from somewhere else (request-accept). For instance,
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;; when editing / saving and so on.
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;; Remarks:
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;; =======
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;; * nnoo. NNDiary is very similar to nnml. This makes the idea of using nnoo
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;; (to derive nndiary from nnml) natural. However, my experience with nnoo
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;; is that for reasonably complex back ends like this one, noo is a burden
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;; rather than an help. It's tricky to use, not everything can be inherited,
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;; what can be inherited and when is not very clear, and you've got to be
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;; very careful because a little mistake can fuck up your other back ends,
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;; especially because their variables will be use instead of your real ones.
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;; Finally, I found it easier to just clone the needed parts of nnml, and
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;; tracking nnml updates is not a big deal.
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;; IMHO, nnoo is actually badly designed. A much simpler, and yet more
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;; powerful one would be to make *real* functions and variables for a new
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;; back end based on another. Lisp is a reflexive language so that's a very
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;; easy thing to do: inspect the function's form, replace occurences of
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;; <nnfrom> (even in strings) with <nnto>, and you're done.
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;; * nndiary-get-new-mail, nndiary-mail-source and nndiary-split-methods:
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;; NNDiary has some experimental parts, in the sense Gnus normally uses only
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;; one mail back ends for mail retreival and splitting. This back end is
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;; also an attempt to make it behave differently. For Gnus developpers: as
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;; you can see if you snarf into the code, that was not a very difficult
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;; thing to do. Something should be done about the respooling breakage
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;; though.
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;;; Code:
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(require 'nnoo)
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(require 'nnheader)
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(require 'nnmail)
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(eval-when-compile (require 'cl))
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(require 'gnus-start)
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(require 'gnus-sum)
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;; Compatibility Functions =================================================
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(eval-and-compile
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(if (fboundp 'signal-error)
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(defun nndiary-error (&rest args)
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(apply #'signal-error 'nndiary args))
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(defun nndiary-error (&rest args)
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(apply #'error args))))
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;; Back End behavior customization ===========================================
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(defgroup nndiary nil
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"The Gnus Diary back end."
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:version "22.1"
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:group 'gnus-diary)
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(defcustom nndiary-mail-sources
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`((file :path ,(expand-file-name "~/.nndiary")))
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"*NNDiary specific mail sources.
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This variable is used by nndiary in place of the standard `mail-sources'
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variable when `nndiary-get-new-mail' is set to non-nil. These sources
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must contain diary messages ONLY."
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:group 'nndiary
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:group 'mail-source
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:type 'sexp)
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(defcustom nndiary-split-methods '(("diary" ""))
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"*NNDiary specific split methods.
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This variable is used by nndiary in place of the standard
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`nnmail-split-methods' variable when `nndiary-get-new-mail' is set to
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non-nil."
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:group 'nndiary
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:group 'nnmail-split
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:type '(choice (repeat :tag "Alist" (group (string :tag "Name") regexp))
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(function-item nnmail-split-fancy)
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(function :tag "Other")))
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(defcustom nndiary-reminders '((0 . day))
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"*Different times when you want to be reminded of your appointments.
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Diary articles will appear again, as if they'd been just received.
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Entries look like (3 . day) which means something like \"Please
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Hortense, would you be so kind as to remind me of my appointments 3 days
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before the date, thank you very much. Anda, hmmm... by the way, are you
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doing anything special tonight ?\".
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The units of measure are 'minute 'hour 'day 'week 'month and 'year (no,
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not 'century, sorry).
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NOTE: the units of measure actually express dates, not durations: if you
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use 'week, messages will pop up on Sundays at 00:00 (or Mondays if
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`nndiary-week-starts-on-monday' is non-nil) and *not* 7 days before the
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appointment, if you use 'month, messages will pop up on the first day of
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each months, at 00:00 and so on.
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If you really want to specify a duration (like 24 hours exactly), you can
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use the equivalent in minutes (the smallest unit). A fuzz of 60 seconds
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maximum in the reminder is not that painful, I think. Although this
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scheme might appear somewhat weird at a first glance, it is very powerful.
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In order to make this clear, here are some examples:
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- '(0 . day): this is the default value of `nndiary-reminders'. It means
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pop up the appointments of the day each morning at 00:00.
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- '(1 . day): this means pop up the appointments the day before, at 00:00.
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- '(6 . hour): for an appointment at 18:30, this would pop up the
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appointment message at 12:00.
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- '(360 . minute): for an appointment at 18:30 and 15 seconds, this would
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pop up the appointment message at 12:30."
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:group 'nndiary
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:type '(repeat (cons :format "%v\n"
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(integer :format "%v")
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(choice :format "%[%v(s)%] before...\n"
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:value day
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(const :format "%v" minute)
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(const :format "%v" hour)
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(const :format "%v" day)
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(const :format "%v" week)
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(const :format "%v" month)
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(const :format "%v" year)))))
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(defcustom nndiary-week-starts-on-monday nil
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"*Whether a week starts on monday (otherwise, sunday)."
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:type 'boolean
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:group 'nndiary)
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(defcustom nndiary-request-create-group-hooks nil
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"*Hooks to run after `nndiary-request-create-group' is executed.
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The hooks will be called with the full group name as argument."
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:group 'nndiary
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:type 'hook)
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(defcustom nndiary-request-update-info-hooks nil
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"*Hooks to run after `nndiary-request-update-info-group' is executed.
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The hooks will be called with the full group name as argument."
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:group 'nndiary
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:type 'hook)
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(defcustom nndiary-request-accept-article-hooks nil
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"*Hooks to run before accepting an article.
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Executed near the beginning of `nndiary-request-accept-article'.
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The hooks will be called with the article in the current buffer."
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:group 'nndiary
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:type 'hook)
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(defcustom nndiary-check-directory-twice t
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"*If t, check directories twice to avoid NFS failures."
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:group 'nndiary
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:type 'boolean)
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;; Back End declaration ======================================================
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;; Well, most of this is nnml clonage.
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(nnoo-declare nndiary)
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(defvoo nndiary-directory (nnheader-concat gnus-directory "diary/")
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"Spool directory for the nndiary back end.")
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(defvoo nndiary-active-file
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(expand-file-name "active" nndiary-directory)
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"Active file for the nndiary back end.")
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(defvoo nndiary-newsgroups-file
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(expand-file-name "newsgroups" nndiary-directory)
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"Newsgroups description file for the nndiary back end.")
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(defvoo nndiary-get-new-mail nil
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"Whether nndiary gets new mail and split it.
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Contrary to traditional mail back ends, this variable can be set to t
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even if your primary mail back end also retreives mail. In such a case,
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NDiary uses its own mail-sources and split-methods.")
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(defvoo nndiary-nov-is-evil nil
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"If non-nil, Gnus will never use nov databases for nndiary groups.
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Using nov databases will speed up header fetching considerably.
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This variable shouldn't be flipped much. If you have, for some reason,
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set this to t, and want to set it to nil again, you should always run
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the `nndiary-generate-nov-databases' command. The function will go
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through all nnml directories and generate nov databases for them
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all. This may very well take some time.")
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(defvoo nndiary-prepare-save-mail-hook nil
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"*Hook run narrowed to an article before saving.")
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(defvoo nndiary-inhibit-expiry nil
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"If non-nil, inhibit expiry.")
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(defconst nndiary-version "0.2-b14"
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"Current Diary back end version.")
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(defun nndiary-version ()
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"Current Diary back end version."
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(interactive)
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(message "NNDiary version %s" nndiary-version))
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(defvoo nndiary-nov-file-name ".overview")
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(defvoo nndiary-current-directory nil)
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(defvoo nndiary-current-group nil)
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(defvoo nndiary-status-string "" )
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(defvoo nndiary-nov-buffer-alist nil)
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(defvoo nndiary-group-alist nil)
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(defvoo nndiary-active-timestamp nil)
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(defvoo nndiary-article-file-alist nil)
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(defvoo nndiary-generate-active-function 'nndiary-generate-active-info)
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(defvoo nndiary-nov-buffer-file-name nil)
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(defvoo nndiary-file-coding-system nnmail-file-coding-system)
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(defconst nndiary-headers
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'(("Minute" 0 59)
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("Hour" 0 23)
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("Dom" 1 31)
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("Month" 1 12)
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("Year" 1971)
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("Dow" 0 6)
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("Time-Zone" (("Y" -43200)
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("X" -39600)
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("W" -36000)
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("V" -32400)
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("U" -28800)
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("PST" -28800)
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("T" -25200)
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("MST" -25200)
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("PDT" -25200)
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("S" -21600)
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("CST" -21600)
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("MDT" -21600)
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("R" -18000)
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("EST" -18000)
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("CDT" -18000)
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("Q" -14400)
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("AST" -14400)
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("EDT" -14400)
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("P" -10800)
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("ADT" -10800)
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("O" -7200)
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("N" -3600)
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("Z" 0)
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("GMT" 0)
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("UT" 0)
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("UTC" 0)
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("WET" 0)
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("A" 3600)
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("CET" 3600)
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("MET" 3600)
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("MEZ" 3600)
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("BST" 3600)
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("WEST" 3600)
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("B" 7200)
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("EET" 7200)
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("CEST" 7200)
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("MEST" 7200)
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("MESZ" 7200)
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("C" 10800)
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("D" 14400)
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("E" 18000)
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("F" 21600)
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("G" 25200)
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("H" 28800)
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("I" 32400)
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("JST" 32400)
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("K" 36000)
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("GST" 36000)
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("L" 39600)
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("M" 43200)
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("NZST" 43200)
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("NZDT" 46800))))
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;; List of NNDiary headers that specify the time spec. Each header name is
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;; followed by either two integers (specifying a range of possible values
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;; for this header) or one list (specifying all the possible values for this
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;; header). In the latter case, the list does NOT include the unspecifyed
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;; spec (*).
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;; For time zone values, we have symbolic time zone names associated with
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;; the (relative) number of seconds ahead GMT.
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)
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(defsubst nndiary-schedule ()
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(let (head)
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(condition-case arg
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(mapcar
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(lambda (elt)
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(setq head (nth 0 elt))
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(nndiary-parse-schedule (nth 0 elt) (nth 1 elt) (nth 2 elt)))
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nndiary-headers)
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(t
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(nnheader-report 'nndiary "X-Diary-%s header parse error: %s."
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head (cdr arg))
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nil))
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))
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;;; Interface functions =====================================================
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(nnoo-define-basics nndiary)
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(deffoo nndiary-retrieve-headers (sequence &optional group server fetch-old)
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(when (nndiary-possibly-change-directory group server)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(let* ((file nil)
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(number (length sequence))
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(count 0)
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(file-name-coding-system nnmail-pathname-coding-system)
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beg article
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(nndiary-check-directory-twice
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(and nndiary-check-directory-twice
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;; To speed up, disable it in some case.
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(or (not (numberp nnmail-large-newsgroup))
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(<= number nnmail-large-newsgroup)))))
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(if (stringp (car sequence))
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'headers
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(if (nndiary-retrieve-headers-with-nov sequence fetch-old)
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'nov
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(while sequence
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(setq article (car sequence))
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(setq file (nndiary-article-to-file article))
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(when (and file
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(file-exists-p file)
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(not (file-directory-p file)))
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(insert (format "221 %d Article retrieved.\n" article))
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(setq beg (point))
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(nnheader-insert-head file)
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(goto-char beg)
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(if (search-forward "\n\n" nil t)
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(forward-char -1)
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(goto-char (point-max))
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(insert "\n\n"))
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(insert ".\n")
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(delete-region (point) (point-max)))
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(setq sequence (cdr sequence))
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(setq count (1+ count))
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(and (numberp nnmail-large-newsgroup)
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(> number nnmail-large-newsgroup)
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(zerop (% count 20))
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(nnheader-message 6 "nndiary: Receiving headers... %d%%"
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(/ (* count 100) number))))
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(and (numberp nnmail-large-newsgroup)
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(> number nnmail-large-newsgroup)
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(nnheader-message 6 "nndiary: Receiving headers...done"))
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(nnheader-fold-continuation-lines)
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'headers))))))
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(deffoo nndiary-open-server (server &optional defs)
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(nnoo-change-server 'nndiary server defs)
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(when (not (file-exists-p nndiary-directory))
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(ignore-errors (make-directory nndiary-directory t)))
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(cond
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((not (file-exists-p nndiary-directory))
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(nndiary-close-server)
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(nnheader-report 'nndiary "Couldn't create directory: %s"
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nndiary-directory))
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((not (file-directory-p (file-truename nndiary-directory)))
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(nndiary-close-server)
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(nnheader-report 'nndiary "Not a directory: %s" nndiary-directory))
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(t
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(nnheader-report 'nndiary "Opened server %s using directory %s"
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server nndiary-directory)
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t)))
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(deffoo nndiary-request-regenerate (server)
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(nndiary-possibly-change-directory nil server)
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(nndiary-generate-nov-databases server)
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t)
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(deffoo nndiary-request-article (id &optional group server buffer)
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(nndiary-possibly-change-directory group server)
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(let* ((nntp-server-buffer (or buffer nntp-server-buffer))
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(file-name-coding-system nnmail-pathname-coding-system)
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path gpath group-num)
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(if (stringp id)
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(when (and (setq group-num (nndiary-find-group-number id))
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(cdr
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(assq (cdr group-num)
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(nnheader-article-to-file-alist
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(setq gpath
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(nnmail-group-pathname
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(car group-num)
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nndiary-directory))))))
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(setq path (concat gpath (int-to-string (cdr group-num)))))
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(setq path (nndiary-article-to-file id)))
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(cond
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((not path)
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(nnheader-report 'nndiary "No such article: %s" id))
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((not (file-exists-p path))
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(nnheader-report 'nndiary "No such file: %s" path))
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((file-directory-p path)
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(nnheader-report 'nndiary "File is a directory: %s" path))
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((not (save-excursion (let ((nnmail-file-coding-system
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nndiary-file-coding-system))
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(nnmail-find-file path))))
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(nnheader-report 'nndiary "Couldn't read file: %s" path))
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(t
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(nnheader-report 'nndiary "Article %s retrieved" id)
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;; We return the article number.
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(cons (if group-num (car group-num) group)
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(string-to-number (file-name-nondirectory path)))))))
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(deffoo nndiary-request-group (group &optional server dont-check)
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(let ((file-name-coding-system nnmail-pathname-coding-system))
|
||
(cond
|
||
((not (nndiary-possibly-change-directory group server))
|
||
(nnheader-report 'nndiary "Invalid group (no such directory)"))
|
||
((not (file-exists-p nndiary-current-directory))
|
||
(nnheader-report 'nndiary "Directory %s does not exist"
|
||
nndiary-current-directory))
|
||
((not (file-directory-p nndiary-current-directory))
|
||
(nnheader-report 'nndiary "%s is not a directory"
|
||
nndiary-current-directory))
|
||
(dont-check
|
||
(nnheader-report 'nndiary "Group %s selected" group)
|
||
t)
|
||
(t
|
||
(nnheader-re-read-dir nndiary-current-directory)
|
||
(nnmail-activate 'nndiary)
|
||
(let ((active (nth 1 (assoc group nndiary-group-alist))))
|
||
(if (not active)
|
||
(nnheader-report 'nndiary "No such group: %s" group)
|
||
(nnheader-report 'nndiary "Selected group %s" group)
|
||
(nnheader-insert "211 %d %d %d %s\n"
|
||
(max (1+ (- (cdr active) (car active))) 0)
|
||
(car active) (cdr active) group)))))))
|
||
|
||
(deffoo nndiary-request-scan (&optional group server)
|
||
;; Use our own mail sources and split methods while Gnus doesn't let us have
|
||
;; multiple back ends for retrieving mail.
|
||
(let ((mail-sources nndiary-mail-sources)
|
||
(nnmail-split-methods nndiary-split-methods))
|
||
(setq nndiary-article-file-alist nil)
|
||
(nndiary-possibly-change-directory group server)
|
||
(nnmail-get-new-mail 'nndiary 'nndiary-save-nov nndiary-directory group)))
|
||
|
||
(deffoo nndiary-close-group (group &optional server)
|
||
(setq nndiary-article-file-alist nil)
|
||
t)
|
||
|
||
(deffoo nndiary-request-create-group (group &optional server args)
|
||
(nndiary-possibly-change-directory nil server)
|
||
(nnmail-activate 'nndiary)
|
||
(cond
|
||
((assoc group nndiary-group-alist)
|
||
t)
|
||
((and (file-exists-p (nnmail-group-pathname group nndiary-directory))
|
||
(not (file-directory-p (nnmail-group-pathname
|
||
group nndiary-directory))))
|
||
(nnheader-report 'nndiary "%s is a file"
|
||
(nnmail-group-pathname group nndiary-directory)))
|
||
(t
|
||
(let (active)
|
||
(push (list group (setq active (cons 1 0)))
|
||
nndiary-group-alist)
|
||
(nndiary-possibly-create-directory group)
|
||
(nndiary-possibly-change-directory group server)
|
||
(let ((articles (nnheader-directory-articles nndiary-current-directory)))
|
||
(when articles
|
||
(setcar active (apply 'min articles))
|
||
(setcdr active (apply 'max articles))))
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file)
|
||
(run-hook-with-args 'nndiary-request-create-group-hooks
|
||
(gnus-group-prefixed-name group
|
||
(list "nndiary" server)))
|
||
t))
|
||
))
|
||
|
||
(deffoo nndiary-request-list (&optional server)
|
||
(save-excursion
|
||
(let ((nnmail-file-coding-system nnmail-active-file-coding-system)
|
||
(file-name-coding-system nnmail-pathname-coding-system))
|
||
(nnmail-find-file nndiary-active-file))
|
||
(setq nndiary-group-alist (nnmail-get-active))
|
||
t))
|
||
|
||
(deffoo nndiary-request-newgroups (date &optional server)
|
||
(nndiary-request-list server))
|
||
|
||
(deffoo nndiary-request-list-newsgroups (&optional server)
|
||
(save-excursion
|
||
(nnmail-find-file nndiary-newsgroups-file)))
|
||
|
||
(deffoo nndiary-request-expire-articles (articles group &optional server force)
|
||
(nndiary-possibly-change-directory group server)
|
||
(let ((active-articles
|
||
(nnheader-directory-articles nndiary-current-directory))
|
||
article rest number)
|
||
(nnmail-activate 'nndiary)
|
||
;; Articles not listed in active-articles are already gone,
|
||
;; so don't try to expire them.
|
||
(setq articles (gnus-intersection articles active-articles))
|
||
(while articles
|
||
(setq article (nndiary-article-to-file (setq number (pop articles))))
|
||
(if (and (nndiary-deletable-article-p group number)
|
||
;; Don't use nnmail-expired-article-p. Our notion of expiration
|
||
;; is a bit peculiar ...
|
||
(or force (nndiary-expired-article-p article)))
|
||
(progn
|
||
;; Allow a special target group.
|
||
(unless (eq nnmail-expiry-target 'delete)
|
||
(with-temp-buffer
|
||
(nndiary-request-article number group server (current-buffer))
|
||
(let ((nndiary-current-directory nil))
|
||
(nnmail-expiry-target-group nnmail-expiry-target group)))
|
||
(nndiary-possibly-change-directory group server))
|
||
(nnheader-message 5 "Deleting article %s in %s" number group)
|
||
(condition-case ()
|
||
(funcall nnmail-delete-file-function article)
|
||
(file-error (push number rest)))
|
||
(setq active-articles (delq number active-articles))
|
||
(nndiary-nov-delete-article group number))
|
||
(push number rest)))
|
||
(let ((active (nth 1 (assoc group nndiary-group-alist))))
|
||
(when active
|
||
(setcar active (or (and active-articles
|
||
(apply 'min active-articles))
|
||
(1+ (cdr active)))))
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file))
|
||
(nndiary-save-nov)
|
||
(nconc rest articles)))
|
||
|
||
(deffoo nndiary-request-move-article
|
||
(article group server accept-form &optional last move-is-internal)
|
||
(let ((buf (get-buffer-create " *nndiary move*"))
|
||
result)
|
||
(nndiary-possibly-change-directory group server)
|
||
(nndiary-update-file-alist)
|
||
(and
|
||
(nndiary-deletable-article-p group article)
|
||
(nndiary-request-article article group server)
|
||
(let (nndiary-current-directory
|
||
nndiary-current-group
|
||
nndiary-article-file-alist)
|
||
(save-excursion
|
||
(set-buffer buf)
|
||
(insert-buffer-substring nntp-server-buffer)
|
||
(setq result (eval accept-form))
|
||
(kill-buffer (current-buffer))
|
||
result))
|
||
(progn
|
||
(nndiary-possibly-change-directory group server)
|
||
(condition-case ()
|
||
(funcall nnmail-delete-file-function
|
||
(nndiary-article-to-file article))
|
||
(file-error nil))
|
||
(nndiary-nov-delete-article group article)
|
||
(when last
|
||
(nndiary-save-nov)
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file))))
|
||
result))
|
||
|
||
(deffoo nndiary-request-accept-article (group &optional server last)
|
||
(nndiary-possibly-change-directory group server)
|
||
(nnmail-check-syntax)
|
||
(run-hooks 'nndiary-request-accept-article-hooks)
|
||
(when (nndiary-schedule)
|
||
(let (result)
|
||
(when nnmail-cache-accepted-message-ids
|
||
(nnmail-cache-insert (nnmail-fetch-field "message-id")
|
||
group
|
||
(nnmail-fetch-field "subject")))
|
||
(if (stringp group)
|
||
(and
|
||
(nnmail-activate 'nndiary)
|
||
(setq result
|
||
(car (nndiary-save-mail
|
||
(list (cons group (nndiary-active-number group))))))
|
||
(progn
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file)
|
||
(and last (nndiary-save-nov))))
|
||
(and
|
||
(nnmail-activate 'nndiary)
|
||
(if (and (not (setq result
|
||
(nnmail-article-group 'nndiary-active-number)))
|
||
(yes-or-no-p "Moved to `junk' group; delete article? "))
|
||
(setq result 'junk)
|
||
(setq result (car (nndiary-save-mail result))))
|
||
(when last
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file)
|
||
(when nnmail-cache-accepted-message-ids
|
||
(nnmail-cache-close))
|
||
(nndiary-save-nov))))
|
||
result))
|
||
)
|
||
|
||
(deffoo nndiary-request-post (&optional server)
|
||
(nnmail-do-request-post 'nndiary-request-accept-article server))
|
||
|
||
(deffoo nndiary-request-replace-article (article group buffer)
|
||
(nndiary-possibly-change-directory group)
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(nndiary-possibly-create-directory group)
|
||
(let ((chars (nnmail-insert-lines))
|
||
(art (concat (int-to-string article) "\t"))
|
||
headers)
|
||
(when (ignore-errors
|
||
(nnmail-write-region
|
||
(point-min) (point-max)
|
||
(or (nndiary-article-to-file article)
|
||
(expand-file-name (int-to-string article)
|
||
nndiary-current-directory))
|
||
nil (if (nnheader-be-verbose 5) nil 'nomesg))
|
||
t)
|
||
(setq headers (nndiary-parse-head chars article))
|
||
;; Replace the NOV line in the NOV file.
|
||
(save-excursion
|
||
(set-buffer (nndiary-open-nov group))
|
||
(goto-char (point-min))
|
||
(if (or (looking-at art)
|
||
(search-forward (concat "\n" art) nil t))
|
||
;; Delete the old NOV line.
|
||
(delete-region (progn (beginning-of-line) (point))
|
||
(progn (forward-line 1) (point)))
|
||
;; The line isn't here, so we have to find out where
|
||
;; we should insert it. (This situation should never
|
||
;; occur, but one likes to make sure...)
|
||
(while (and (looking-at "[0-9]+\t")
|
||
(< (string-to-number
|
||
(buffer-substring
|
||
(match-beginning 0) (match-end 0)))
|
||
article)
|
||
(zerop (forward-line 1)))))
|
||
(beginning-of-line)
|
||
(nnheader-insert-nov headers)
|
||
(nndiary-save-nov)
|
||
t)))))
|
||
|
||
(deffoo nndiary-request-delete-group (group &optional force server)
|
||
(nndiary-possibly-change-directory group server)
|
||
(when force
|
||
;; Delete all articles in GROUP.
|
||
(let ((articles
|
||
(directory-files
|
||
nndiary-current-directory t
|
||
(concat nnheader-numerical-short-files
|
||
"\\|" (regexp-quote nndiary-nov-file-name) "$")))
|
||
article)
|
||
(while articles
|
||
(setq article (pop articles))
|
||
(when (file-writable-p article)
|
||
(nnheader-message 5 "Deleting article %s in %s..." article group)
|
||
(funcall nnmail-delete-file-function article))))
|
||
;; Try to delete the directory itself.
|
||
(ignore-errors (delete-directory nndiary-current-directory)))
|
||
;; Remove the group from all structures.
|
||
(setq nndiary-group-alist
|
||
(delq (assoc group nndiary-group-alist) nndiary-group-alist)
|
||
nndiary-current-group nil
|
||
nndiary-current-directory nil)
|
||
;; Save the active file.
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file)
|
||
t)
|
||
|
||
(deffoo nndiary-request-rename-group (group new-name &optional server)
|
||
(nndiary-possibly-change-directory group server)
|
||
(let ((new-dir (nnmail-group-pathname new-name nndiary-directory))
|
||
(old-dir (nnmail-group-pathname group nndiary-directory)))
|
||
(when (ignore-errors
|
||
(make-directory new-dir t)
|
||
t)
|
||
;; We move the articles file by file instead of renaming
|
||
;; the directory -- there may be subgroups in this group.
|
||
;; One might be more clever, I guess.
|
||
(let ((files (nnheader-article-to-file-alist old-dir)))
|
||
(while files
|
||
(rename-file
|
||
(concat old-dir (cdar files))
|
||
(concat new-dir (cdar files)))
|
||
(pop files)))
|
||
;; Move .overview file.
|
||
(let ((overview (concat old-dir nndiary-nov-file-name)))
|
||
(when (file-exists-p overview)
|
||
(rename-file overview (concat new-dir nndiary-nov-file-name))))
|
||
(when (<= (length (directory-files old-dir)) 2)
|
||
(ignore-errors (delete-directory old-dir)))
|
||
;; That went ok, so we change the internal structures.
|
||
(let ((entry (assoc group nndiary-group-alist)))
|
||
(when entry
|
||
(setcar entry new-name))
|
||
(setq nndiary-current-directory nil
|
||
nndiary-current-group nil)
|
||
;; Save the new group alist.
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file)
|
||
t))))
|
||
|
||
(deffoo nndiary-set-status (article name value &optional group server)
|
||
(nndiary-possibly-change-directory group server)
|
||
(let ((file (nndiary-article-to-file article)))
|
||
(cond
|
||
((not (file-exists-p file))
|
||
(nnheader-report 'nndiary "File %s does not exist" file))
|
||
(t
|
||
(with-temp-file file
|
||
(nnheader-insert-file-contents file)
|
||
(nnmail-replace-status name value))
|
||
t))))
|
||
|
||
|
||
;;; Interface optional functions ============================================
|
||
|
||
(deffoo nndiary-request-update-info (group info &optional server)
|
||
(nndiary-possibly-change-directory group)
|
||
(let ((timestamp (gnus-group-parameter-value (gnus-info-params info)
|
||
'timestamp t)))
|
||
(if (not timestamp)
|
||
(nnheader-report 'nndiary "Group %s doesn't have a timestamp" group)
|
||
;; else
|
||
;; Figure out which articles should be re-new'ed
|
||
(let ((articles (nndiary-flatten (gnus-info-read info) 0))
|
||
article file unread buf)
|
||
(save-excursion
|
||
(setq buf (nnheader-set-temp-buffer " *nndiary update*"))
|
||
(while (setq article (pop articles))
|
||
(setq file (concat nndiary-current-directory
|
||
(int-to-string article)))
|
||
(and (file-exists-p file)
|
||
(nndiary-renew-article-p file timestamp)
|
||
(push article unread)))
|
||
;;(message "unread: %s" unread)
|
||
(sit-for 1)
|
||
(kill-buffer buf))
|
||
(setq unread (sort unread '<))
|
||
(and unread
|
||
(gnus-info-set-read info (gnus-update-read-articles
|
||
(gnus-info-group info) unread t)))
|
||
))
|
||
(run-hook-with-args 'nndiary-request-update-info-hooks
|
||
(gnus-info-group info))
|
||
t))
|
||
|
||
|
||
|
||
;;; Internal functions ======================================================
|
||
|
||
(defun nndiary-article-to-file (article)
|
||
(nndiary-update-file-alist)
|
||
(let (file)
|
||
(if (setq file (cdr (assq article nndiary-article-file-alist)))
|
||
(expand-file-name file nndiary-current-directory)
|
||
;; Just to make sure nothing went wrong when reading over NFS --
|
||
;; check once more.
|
||
(if nndiary-check-directory-twice
|
||
(when (file-exists-p
|
||
(setq file (expand-file-name (number-to-string article)
|
||
nndiary-current-directory)))
|
||
(nndiary-update-file-alist t)
|
||
file)))))
|
||
|
||
(defun nndiary-deletable-article-p (group article)
|
||
"Say whether ARTICLE in GROUP can be deleted."
|
||
(let (path)
|
||
(when (setq path (nndiary-article-to-file article))
|
||
(when (file-writable-p path)
|
||
(or (not nnmail-keep-last-article)
|
||
(not (eq (cdr (nth 1 (assoc group nndiary-group-alist)))
|
||
article)))))))
|
||
|
||
;; Find an article number in the current group given the Message-ID.
|
||
(defun nndiary-find-group-number (id)
|
||
(save-excursion
|
||
(set-buffer (get-buffer-create " *nndiary id*"))
|
||
(let ((alist nndiary-group-alist)
|
||
number)
|
||
;; We want to look through all .overview files, but we want to
|
||
;; start with the one in the current directory. It seems most
|
||
;; likely that the article we are looking for is in that group.
|
||
(if (setq number (nndiary-find-id nndiary-current-group id))
|
||
(cons nndiary-current-group number)
|
||
;; It wasn't there, so we look through the other groups as well.
|
||
(while (and (not number)
|
||
alist)
|
||
(or (string= (caar alist) nndiary-current-group)
|
||
(setq number (nndiary-find-id (caar alist) id)))
|
||
(or number
|
||
(setq alist (cdr alist))))
|
||
(and number
|
||
(cons (caar alist) number))))))
|
||
|
||
(defun nndiary-find-id (group id)
|
||
(erase-buffer)
|
||
(let ((nov (expand-file-name nndiary-nov-file-name
|
||
(nnmail-group-pathname group
|
||
nndiary-directory)))
|
||
number found)
|
||
(when (file-exists-p nov)
|
||
(nnheader-insert-file-contents nov)
|
||
(while (and (not found)
|
||
(search-forward id nil t)) ; We find the ID.
|
||
;; And the id is in the fourth field.
|
||
(if (not (and (search-backward "\t" nil t 4)
|
||
(not (search-backward"\t" (point-at-bol) t))))
|
||
(forward-line 1)
|
||
(beginning-of-line)
|
||
(setq found t)
|
||
;; We return the article number.
|
||
(setq number
|
||
(ignore-errors (read (current-buffer))))))
|
||
number)))
|
||
|
||
(defun nndiary-retrieve-headers-with-nov (articles &optional fetch-old)
|
||
(if (or gnus-nov-is-evil nndiary-nov-is-evil)
|
||
nil
|
||
(let ((nov (expand-file-name nndiary-nov-file-name
|
||
nndiary-current-directory)))
|
||
(when (file-exists-p nov)
|
||
(save-excursion
|
||
(set-buffer nntp-server-buffer)
|
||
(erase-buffer)
|
||
(nnheader-insert-file-contents nov)
|
||
(if (and fetch-old
|
||
(not (numberp fetch-old)))
|
||
t ; Don't remove anything.
|
||
(nnheader-nov-delete-outside-range
|
||
(if fetch-old (max 1 (- (car articles) fetch-old))
|
||
(car articles))
|
||
(car (last articles)))
|
||
t))))))
|
||
|
||
(defun nndiary-possibly-change-directory (group &optional server)
|
||
(when (and server
|
||
(not (nndiary-server-opened server)))
|
||
(nndiary-open-server server))
|
||
(if (not group)
|
||
t
|
||
(let ((pathname (nnmail-group-pathname group nndiary-directory))
|
||
(file-name-coding-system nnmail-pathname-coding-system))
|
||
(when (not (equal pathname nndiary-current-directory))
|
||
(setq nndiary-current-directory pathname
|
||
nndiary-current-group group
|
||
nndiary-article-file-alist nil))
|
||
(file-exists-p nndiary-current-directory))))
|
||
|
||
(defun nndiary-possibly-create-directory (group)
|
||
(let ((dir (nnmail-group-pathname group nndiary-directory)))
|
||
(unless (file-exists-p dir)
|
||
(make-directory (directory-file-name dir) t)
|
||
(nnheader-message 5 "Creating mail directory %s" dir))))
|
||
|
||
(defun nndiary-save-mail (group-art)
|
||
"Called narrowed to an article."
|
||
(let (chars headers)
|
||
(setq chars (nnmail-insert-lines))
|
||
(nnmail-insert-xref group-art)
|
||
(run-hooks 'nnmail-prepare-save-mail-hook)
|
||
(run-hooks 'nndiary-prepare-save-mail-hook)
|
||
(goto-char (point-min))
|
||
(while (looking-at "From ")
|
||
(replace-match "X-From-Line: ")
|
||
(forward-line 1))
|
||
;; We save the article in all the groups it belongs in.
|
||
(let ((ga group-art)
|
||
first)
|
||
(while ga
|
||
(nndiary-possibly-create-directory (caar ga))
|
||
(let ((file (concat (nnmail-group-pathname
|
||
(caar ga) nndiary-directory)
|
||
(int-to-string (cdar ga)))))
|
||
(if first
|
||
;; It was already saved, so we just make a hard link.
|
||
(funcall nnmail-crosspost-link-function first file t)
|
||
;; Save the article.
|
||
(nnmail-write-region (point-min) (point-max) file nil
|
||
(if (nnheader-be-verbose 5) nil 'nomesg))
|
||
(setq first file)))
|
||
(setq ga (cdr ga))))
|
||
;; Generate a nov line for this article. We generate the nov
|
||
;; line after saving, because nov generation destroys the
|
||
;; header.
|
||
(setq headers (nndiary-parse-head chars))
|
||
;; Output the nov line to all nov databases that should have it.
|
||
(let ((ga group-art))
|
||
(while ga
|
||
(nndiary-add-nov (caar ga) (cdar ga) headers)
|
||
(setq ga (cdr ga))))
|
||
group-art))
|
||
|
||
(defun nndiary-active-number (group)
|
||
"Compute the next article number in GROUP."
|
||
(let ((active (cadr (assoc group nndiary-group-alist))))
|
||
;; The group wasn't known to nndiary, so we just create an active
|
||
;; entry for it.
|
||
(unless active
|
||
;; Perhaps the active file was corrupt? See whether
|
||
;; there are any articles in this group.
|
||
(nndiary-possibly-create-directory group)
|
||
(nndiary-possibly-change-directory group)
|
||
(unless nndiary-article-file-alist
|
||
(setq nndiary-article-file-alist
|
||
(sort
|
||
(nnheader-article-to-file-alist nndiary-current-directory)
|
||
'car-less-than-car)))
|
||
(setq active
|
||
(if nndiary-article-file-alist
|
||
(cons (caar nndiary-article-file-alist)
|
||
(caar (last nndiary-article-file-alist)))
|
||
(cons 1 0)))
|
||
(push (list group active) nndiary-group-alist))
|
||
(setcdr active (1+ (cdr active)))
|
||
(while (file-exists-p
|
||
(expand-file-name (int-to-string (cdr active))
|
||
(nnmail-group-pathname group nndiary-directory)))
|
||
(setcdr active (1+ (cdr active))))
|
||
(cdr active)))
|
||
|
||
(defun nndiary-add-nov (group article headers)
|
||
"Add a nov line for the GROUP base."
|
||
(save-excursion
|
||
(set-buffer (nndiary-open-nov group))
|
||
(goto-char (point-max))
|
||
(mail-header-set-number headers article)
|
||
(nnheader-insert-nov headers)))
|
||
|
||
(defsubst nndiary-header-value ()
|
||
(buffer-substring (match-end 0) (progn (end-of-line) (point))))
|
||
|
||
(defun nndiary-parse-head (chars &optional number)
|
||
"Parse the head of the current buffer."
|
||
(save-excursion
|
||
(save-restriction
|
||
(unless (zerop (buffer-size))
|
||
(narrow-to-region
|
||
(goto-char (point-min))
|
||
(if (search-forward "\n\n" nil t) (1- (point)) (point-max))))
|
||
(let ((headers (nnheader-parse-naked-head)))
|
||
(mail-header-set-chars headers chars)
|
||
(mail-header-set-number headers number)
|
||
headers))))
|
||
|
||
(defun nndiary-open-nov (group)
|
||
(or (cdr (assoc group nndiary-nov-buffer-alist))
|
||
(let ((buffer (get-buffer-create (format " *nndiary overview %s*"
|
||
group))))
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(set (make-local-variable 'nndiary-nov-buffer-file-name)
|
||
(expand-file-name
|
||
nndiary-nov-file-name
|
||
(nnmail-group-pathname group nndiary-directory)))
|
||
(erase-buffer)
|
||
(when (file-exists-p nndiary-nov-buffer-file-name)
|
||
(nnheader-insert-file-contents nndiary-nov-buffer-file-name)))
|
||
(push (cons group buffer) nndiary-nov-buffer-alist)
|
||
buffer)))
|
||
|
||
(defun nndiary-save-nov ()
|
||
(save-excursion
|
||
(while nndiary-nov-buffer-alist
|
||
(when (buffer-name (cdar nndiary-nov-buffer-alist))
|
||
(set-buffer (cdar nndiary-nov-buffer-alist))
|
||
(when (buffer-modified-p)
|
||
(nnmail-write-region 1 (point-max) nndiary-nov-buffer-file-name
|
||
nil 'nomesg))
|
||
(set-buffer-modified-p nil)
|
||
(kill-buffer (current-buffer)))
|
||
(setq nndiary-nov-buffer-alist (cdr nndiary-nov-buffer-alist)))))
|
||
|
||
;;;###autoload
|
||
(defun nndiary-generate-nov-databases (&optional server)
|
||
"Generate NOV databases in all nndiary directories."
|
||
(interactive (list (or (nnoo-current-server 'nndiary) "")))
|
||
;; Read the active file to make sure we don't re-use articles
|
||
;; numbers in empty groups.
|
||
(nnmail-activate 'nndiary)
|
||
(unless (nndiary-server-opened server)
|
||
(nndiary-open-server server))
|
||
(setq nndiary-directory (expand-file-name nndiary-directory))
|
||
;; Recurse down the directories.
|
||
(nndiary-generate-nov-databases-1 nndiary-directory nil t)
|
||
;; Save the active file.
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file))
|
||
|
||
(defun nndiary-generate-nov-databases-1 (dir &optional seen no-active)
|
||
"Regenerate the NOV database in DIR."
|
||
(interactive "DRegenerate NOV in: ")
|
||
(setq dir (file-name-as-directory dir))
|
||
;; Only scan this sub-tree if we haven't been here yet.
|
||
(unless (member (file-truename dir) seen)
|
||
(push (file-truename dir) seen)
|
||
;; We descend recursively
|
||
(let ((dirs (directory-files dir t nil t))
|
||
dir)
|
||
(while (setq dir (pop dirs))
|
||
(when (and (not (string-match "^\\." (file-name-nondirectory dir)))
|
||
(file-directory-p dir))
|
||
(nndiary-generate-nov-databases-1 dir seen))))
|
||
;; Do this directory.
|
||
(let ((files (sort (nnheader-article-to-file-alist dir)
|
||
'car-less-than-car)))
|
||
(if (not files)
|
||
(let* ((group (nnheader-file-to-group
|
||
(directory-file-name dir) nndiary-directory))
|
||
(info (cadr (assoc group nndiary-group-alist))))
|
||
(when info
|
||
(setcar info (1+ (cdr info)))))
|
||
(funcall nndiary-generate-active-function dir)
|
||
;; Generate the nov file.
|
||
(nndiary-generate-nov-file dir files)
|
||
(unless no-active
|
||
(nnmail-save-active nndiary-group-alist nndiary-active-file))))))
|
||
|
||
(defvar files)
|
||
(defun nndiary-generate-active-info (dir)
|
||
;; Update the active info for this group.
|
||
(let* ((group (nnheader-file-to-group
|
||
(directory-file-name dir) nndiary-directory))
|
||
(entry (assoc group nndiary-group-alist))
|
||
(last (or (caadr entry) 0)))
|
||
(setq nndiary-group-alist (delq entry nndiary-group-alist))
|
||
(push (list group
|
||
(cons (or (caar files) (1+ last))
|
||
(max last
|
||
(or (caar (last files))
|
||
0))))
|
||
nndiary-group-alist)))
|
||
|
||
(defun nndiary-generate-nov-file (dir files)
|
||
(let* ((dir (file-name-as-directory dir))
|
||
(nov (concat dir nndiary-nov-file-name))
|
||
(nov-buffer (get-buffer-create " *nov*"))
|
||
chars file headers)
|
||
(save-excursion
|
||
;; Init the nov buffer.
|
||
(set-buffer nov-buffer)
|
||
(buffer-disable-undo)
|
||
(erase-buffer)
|
||
(set-buffer nntp-server-buffer)
|
||
;; Delete the old NOV file.
|
||
(when (file-exists-p nov)
|
||
(funcall nnmail-delete-file-function nov))
|
||
(while files
|
||
(unless (file-directory-p (setq file (concat dir (cdar files))))
|
||
(erase-buffer)
|
||
(nnheader-insert-file-contents file)
|
||
(narrow-to-region
|
||
(goto-char (point-min))
|
||
(progn
|
||
(search-forward "\n\n" nil t)
|
||
(setq chars (- (point-max) (point)))
|
||
(max 1 (1- (point)))))
|
||
(unless (zerop (buffer-size))
|
||
(goto-char (point-min))
|
||
(setq headers (nndiary-parse-head chars (caar files)))
|
||
(save-excursion
|
||
(set-buffer nov-buffer)
|
||
(goto-char (point-max))
|
||
(nnheader-insert-nov headers)))
|
||
(widen))
|
||
(setq files (cdr files)))
|
||
(save-excursion
|
||
(set-buffer nov-buffer)
|
||
(nnmail-write-region 1 (point-max) nov nil 'nomesg)
|
||
(kill-buffer (current-buffer))))))
|
||
|
||
(defun nndiary-nov-delete-article (group article)
|
||
(save-excursion
|
||
(set-buffer (nndiary-open-nov group))
|
||
(when (nnheader-find-nov-line article)
|
||
(delete-region (point) (progn (forward-line 1) (point)))
|
||
(when (bobp)
|
||
(let ((active (cadr (assoc group nndiary-group-alist)))
|
||
num)
|
||
(when active
|
||
(if (eobp)
|
||
(setf (car active) (1+ (cdr active)))
|
||
(when (and (setq num (ignore-errors (read (current-buffer))))
|
||
(numberp num))
|
||
(setf (car active) num)))))))
|
||
t))
|
||
|
||
(defun nndiary-update-file-alist (&optional force)
|
||
(when (or (not nndiary-article-file-alist)
|
||
force)
|
||
(setq nndiary-article-file-alist
|
||
(nnheader-article-to-file-alist nndiary-current-directory))))
|
||
|
||
|
||
(defun nndiary-string-to-number (str min &optional max)
|
||
;; Like `string-to-number' but barf if STR is not exactly an integer, and not
|
||
;; within the specified bounds.
|
||
;; Signals are caught by `nndiary-schedule'.
|
||
(if (not (string-match "^[ \t]*[0-9]+[ \t]*$" str))
|
||
(nndiary-error "not an integer value")
|
||
;; else
|
||
(let ((val (string-to-number str)))
|
||
(and (or (< val min)
|
||
(and max (> val max)))
|
||
(nndiary-error "value out of range"))
|
||
val)))
|
||
|
||
(defun nndiary-parse-schedule-value (str min-or-values max)
|
||
;; Parse the schedule string STR, or signal an error.
|
||
;; Signals are caught by `nndary-schedule'.
|
||
(if (string-match "[ \t]*\\*[ \t]*" str)
|
||
;; unspecifyed
|
||
nil
|
||
;; specifyed
|
||
(if (listp min-or-values)
|
||
;; min-or-values is values
|
||
;; #### NOTE: this is actually only a hack for time zones.
|
||
(let ((val (and (string-match "[ \t]*\\([^ \t]+\\)[ \t]*" str)
|
||
(match-string 1 str))))
|
||
(if (and val (setq val (assoc val min-or-values)))
|
||
(list (cadr val))
|
||
(nndiary-error "invalid syntax")))
|
||
;; min-or-values is min
|
||
(mapcar
|
||
(lambda (val)
|
||
(let ((res (split-string val "-")))
|
||
(cond
|
||
((= (length res) 1)
|
||
(nndiary-string-to-number (car res) min-or-values max))
|
||
((= (length res) 2)
|
||
;; don't know if crontab accepts this, but ensure
|
||
;; that BEG is <= END
|
||
(let ((beg (nndiary-string-to-number (car res) min-or-values max))
|
||
(end (nndiary-string-to-number (cadr res) min-or-values max)))
|
||
(cond ((< beg end)
|
||
(cons beg end))
|
||
((= beg end)
|
||
beg)
|
||
(t
|
||
(cons end beg)))))
|
||
(t
|
||
(nndiary-error "invalid syntax")))
|
||
))
|
||
(split-string str ",")))
|
||
))
|
||
|
||
;; ### FIXME: remove this function if it's used only once.
|
||
(defun nndiary-parse-schedule (head min-or-values max)
|
||
;; Parse the cron-like value of header X-Diary-HEAD in current buffer.
|
||
;; - Returns nil if `*'
|
||
;; - Otherwise returns a list of integers and/or ranges (BEG . END)
|
||
;; The exception is the Timze-Zone value which is always of the form (STR).
|
||
;; Signals are caught by `nndary-schedule'.
|
||
(let ((header (format "^X-Diary-%s: \\(.*\\)$" head)))
|
||
(goto-char (point-min))
|
||
(if (not (re-search-forward header nil t))
|
||
(nndiary-error "header missing")
|
||
;; else
|
||
(nndiary-parse-schedule-value (match-string 1) min-or-values max))
|
||
))
|
||
|
||
(defun nndiary-max (spec)
|
||
;; Returns the max of specification SPEC, or nil for permanent schedules.
|
||
(unless (null spec)
|
||
(let ((elts spec)
|
||
(max 0)
|
||
elt)
|
||
(while (setq elt (pop elts))
|
||
(if (integerp elt)
|
||
(and (> elt max) (setq max elt))
|
||
(and (> (cdr elt) max) (setq max (cdr elt)))))
|
||
max)))
|
||
|
||
(defun nndiary-flatten (spec min &optional max)
|
||
;; flatten the spec by expanding ranges to all possible values.
|
||
(let (flat n)
|
||
(cond ((null spec)
|
||
;; this happens when I flatten something else than one of my
|
||
;; schedules (a list of read articles for instance).
|
||
(unless (null max)
|
||
(setq n min)
|
||
(while (<= n max)
|
||
(push n flat)
|
||
(setq n (1+ n)))))
|
||
(t
|
||
(let ((elts spec)
|
||
elt)
|
||
(while (setq elt (pop elts))
|
||
(if (integerp elt)
|
||
(push elt flat)
|
||
;; else
|
||
(setq n (car elt))
|
||
(while (<= n (cdr elt))
|
||
(push n flat)
|
||
(setq n (1+ n))))))))
|
||
flat))
|
||
|
||
(defun nndiary-unflatten (spec)
|
||
;; opposite of flatten: build ranges if possible
|
||
(setq spec (sort spec '<))
|
||
(let (min max res)
|
||
(while (setq min (pop spec))
|
||
(setq max min)
|
||
(while (and (car spec) (= (car spec) (1+ max)))
|
||
(setq max (1+ max))
|
||
(pop spec))
|
||
(if (= max min)
|
||
(setq res (append res (list min)))
|
||
(setq res (append res (list (cons min max))))))
|
||
res))
|
||
|
||
(defun nndiary-compute-reminders (date)
|
||
;; Returns a list of times corresponding to the reminders of date DATE.
|
||
;; See the comment in `nndiary-reminders' about rounding.
|
||
(let* ((reminders nndiary-reminders)
|
||
(date-elts (decode-time date))
|
||
;; ### NOTE: out-of-range values are accepted by encode-time. This
|
||
;; makes our life easier.
|
||
(monday (- (nth 3 date-elts)
|
||
(if nndiary-week-starts-on-monday
|
||
(if (zerop (nth 6 date-elts))
|
||
6
|
||
(- (nth 6 date-elts) 1))
|
||
(nth 6 date-elts))))
|
||
reminder res)
|
||
;; remove the DOW and DST entries
|
||
(setcdr (nthcdr 5 date-elts) (nthcdr 8 date-elts))
|
||
(while (setq reminder (pop reminders))
|
||
(push
|
||
(cond ((eq (cdr reminder) 'minute)
|
||
(subtract-time
|
||
(apply 'encode-time 0 (nthcdr 1 date-elts))
|
||
(seconds-to-time (* (car reminder) 60.0))))
|
||
((eq (cdr reminder) 'hour)
|
||
(subtract-time
|
||
(apply 'encode-time 0 0 (nthcdr 2 date-elts))
|
||
(seconds-to-time (* (car reminder) 3600.0))))
|
||
((eq (cdr reminder) 'day)
|
||
(subtract-time
|
||
(apply 'encode-time 0 0 0 (nthcdr 3 date-elts))
|
||
(seconds-to-time (* (car reminder) 86400.0))))
|
||
((eq (cdr reminder) 'week)
|
||
(subtract-time
|
||
(apply 'encode-time 0 0 0 monday (nthcdr 4 date-elts))
|
||
(seconds-to-time (* (car reminder) 604800.0))))
|
||
((eq (cdr reminder) 'month)
|
||
(subtract-time
|
||
(apply 'encode-time 0 0 0 1 (nthcdr 4 date-elts))
|
||
(seconds-to-time (* (car reminder) 18748800.0))))
|
||
((eq (cdr reminder) 'year)
|
||
(subtract-time
|
||
(apply 'encode-time 0 0 0 1 1 (nthcdr 5 date-elts))
|
||
(seconds-to-time (* (car reminder) 400861056.0)))))
|
||
res))
|
||
(sort res 'time-less-p)))
|
||
|
||
(defun nndiary-last-occurence (sched)
|
||
;; Returns the last occurence of schedule SCHED as an Emacs time struct, or
|
||
;; nil for permanent schedule or errors.
|
||
(let ((minute (nndiary-max (nth 0 sched)))
|
||
(hour (nndiary-max (nth 1 sched)))
|
||
(year (nndiary-max (nth 4 sched)))
|
||
(time-zone (or (and (nth 6 sched) (car (nth 6 sched)))
|
||
(current-time-zone))))
|
||
(when year
|
||
(or minute (setq minute 59))
|
||
(or hour (setq hour 23))
|
||
;; I'll just compute all possible values and test them by decreasing
|
||
;; order until one succeeds. This is probably quide rude, but I got
|
||
;; bored in finding a good algorithm for doing that ;-)
|
||
;; ### FIXME: remove identical entries.
|
||
(let ((dom-list (nth 2 sched))
|
||
(month-list (sort (nndiary-flatten (nth 3 sched) 1 12) '>))
|
||
(year-list (sort (nndiary-flatten (nth 4 sched) 1971) '>))
|
||
(dow-list (nth 5 sched)))
|
||
;; Special case: an asterisk in one of the days specifications means
|
||
;; that only the other should be taken into account. If both are
|
||
;; unspecified, you would get all possible days in both.
|
||
(cond ((null dow-list)
|
||
;; this gets all days if dom-list is nil
|
||
(setq dom-list (nndiary-flatten dom-list 1 31)))
|
||
((null dom-list)
|
||
;; this also gets all days if dow-list is nil
|
||
(setq dow-list (nndiary-flatten dow-list 0 6)))
|
||
(t
|
||
(setq dom-list (nndiary-flatten dom-list 1 31))
|
||
(setq dow-list (nndiary-flatten dow-list 0 6))))
|
||
(or
|
||
(catch 'found
|
||
(while (setq year (pop year-list))
|
||
(let ((months month-list)
|
||
month)
|
||
(while (setq month (pop months))
|
||
;; Now we must merge the Dows with the Doms. To do that, we
|
||
;; have to know which day is the 1st one for this month.
|
||
;; Maybe there's simpler, but decode-time(encode-time) will
|
||
;; give us the answer.
|
||
(let ((first (nth 6 (decode-time
|
||
(encode-time 0 0 0 1 month year
|
||
time-zone))))
|
||
(max (cond ((= month 2)
|
||
(if (date-leap-year-p year) 29 28))
|
||
((<= month 7)
|
||
(if (zerop (% month 2)) 30 31))
|
||
(t
|
||
(if (zerop (% month 2)) 31 30))))
|
||
(doms dom-list)
|
||
(dows dow-list)
|
||
day days)
|
||
;; first, review the doms to see if they are valid.
|
||
(while (setq day (pop doms))
|
||
(and (<= day max)
|
||
(push day days)))
|
||
;; second add all possible dows
|
||
(while (setq day (pop dows))
|
||
;; days start at 1.
|
||
(setq day (1+ (- day first)))
|
||
(and (< day 0) (setq day (+ 7 day)))
|
||
(while (<= day max)
|
||
(push day days)
|
||
(setq day (+ 7 day))))
|
||
;; Finally, if we have some days, they are valid
|
||
(when days
|
||
(sort days '>)
|
||
(throw 'found
|
||
(encode-time 0 minute hour
|
||
(car days) month year time-zone)))
|
||
)))))
|
||
;; There's an upper limit, but we didn't find any last occurence.
|
||
;; This means that the schedule is undecidable. This can happen if
|
||
;; you happen to say something like "each Feb 31 until 2038".
|
||
(progn
|
||
(nnheader-report 'nndiary "Undecidable schedule")
|
||
nil))
|
||
))))
|
||
|
||
(defun nndiary-next-occurence (sched now)
|
||
;; Returns the next occurence of schedule SCHED, starting from time NOW.
|
||
;; If there's no next occurence, returns the last one (if any) which is then
|
||
;; in the past.
|
||
(let* ((today (decode-time now))
|
||
(this-minute (nth 1 today))
|
||
(this-hour (nth 2 today))
|
||
(this-day (nth 3 today))
|
||
(this-month (nth 4 today))
|
||
(this-year (nth 5 today))
|
||
(minute-list (sort (nndiary-flatten (nth 0 sched) 0 59) '<))
|
||
(hour-list (sort (nndiary-flatten (nth 1 sched) 0 23) '<))
|
||
(dom-list (nth 2 sched))
|
||
(month-list (sort (nndiary-flatten (nth 3 sched) 1 12) '<))
|
||
(years (if (nth 4 sched)
|
||
(sort (nndiary-flatten (nth 4 sched) 1971) '<)
|
||
t))
|
||
(dow-list (nth 5 sched))
|
||
(year (1- this-year))
|
||
(time-zone (or (and (nth 6 sched) (car (nth 6 sched)))
|
||
(current-time-zone))))
|
||
;; Special case: an asterisk in one of the days specifications means that
|
||
;; only the other should be taken into account. If both are unspecified,
|
||
;; you would get all possible days in both.
|
||
(cond ((null dow-list)
|
||
;; this gets all days if dom-list is nil
|
||
(setq dom-list (nndiary-flatten dom-list 1 31)))
|
||
((null dom-list)
|
||
;; this also gets all days if dow-list is nil
|
||
(setq dow-list (nndiary-flatten dow-list 0 6)))
|
||
(t
|
||
(setq dom-list (nndiary-flatten dom-list 1 31))
|
||
(setq dow-list (nndiary-flatten dow-list 0 6))))
|
||
;; Remove past years.
|
||
(unless (eq years t)
|
||
(while (and (car years) (< (car years) this-year))
|
||
(pop years)))
|
||
(if years
|
||
;; Because we might not be limited in years, we must guard against
|
||
;; infinite loops. Appart from cases like Feb 31, there are probably
|
||
;; other ones, (no monday XXX 2nd etc). I don't know any algorithm to
|
||
;; decide this, so I assume that if we reach 10 years later, the
|
||
;; schedule is undecidable.
|
||
(or
|
||
(catch 'found
|
||
(while (if (eq years t)
|
||
(and (setq year (1+ year))
|
||
(<= year (+ 10 this-year)))
|
||
(setq year (pop years)))
|
||
(let ((months month-list)
|
||
month)
|
||
;; Remove past months for this year.
|
||
(and (= year this-year)
|
||
(while (and (car months) (< (car months) this-month))
|
||
(pop months)))
|
||
(while (setq month (pop months))
|
||
;; Now we must merge the Dows with the Doms. To do that, we
|
||
;; have to know which day is the 1st one for this month.
|
||
;; Maybe there's simpler, but decode-time(encode-time) will
|
||
;; give us the answer.
|
||
(let ((first (nth 6 (decode-time
|
||
(encode-time 0 0 0 1 month year
|
||
time-zone))))
|
||
(max (cond ((= month 2)
|
||
(if (date-leap-year-p year) 29 28))
|
||
((<= month 7)
|
||
(if (zerop (% month 2)) 30 31))
|
||
(t
|
||
(if (zerop (% month 2)) 31 30))))
|
||
(doms dom-list)
|
||
(dows dow-list)
|
||
day days)
|
||
;; first, review the doms to see if they are valid.
|
||
(while (setq day (pop doms))
|
||
(and (<= day max)
|
||
(push day days)))
|
||
;; second add all possible dows
|
||
(while (setq day (pop dows))
|
||
;; days start at 1.
|
||
(setq day (1+ (- day first)))
|
||
(and (< day 0) (setq day (+ 7 day)))
|
||
(while (<= day max)
|
||
(push day days)
|
||
(setq day (+ 7 day))))
|
||
;; Aaaaaaall right. Now we have a valid list of DAYS for
|
||
;; this month and this year.
|
||
(when days
|
||
(setq days (sort days '<))
|
||
;; Remove past days for this year and this month.
|
||
(and (= year this-year)
|
||
(= month this-month)
|
||
(while (and (car days) (< (car days) this-day))
|
||
(pop days)))
|
||
(while (setq day (pop days))
|
||
(let ((hours hour-list)
|
||
hour)
|
||
;; Remove past hours for this year, this month and
|
||
;; this day.
|
||
(and (= year this-year)
|
||
(= month this-month)
|
||
(= day this-day)
|
||
(while (and (car hours)
|
||
(< (car hours) this-hour))
|
||
(pop hours)))
|
||
(while (setq hour (pop hours))
|
||
(let ((minutes minute-list)
|
||
minute)
|
||
;; Remove past hours for this year, this month,
|
||
;; this day and this hour.
|
||
(and (= year this-year)
|
||
(= month this-month)
|
||
(= day this-day)
|
||
(= hour this-hour)
|
||
(while (and (car minutes)
|
||
(< (car minutes) this-minute))
|
||
(pop minutes)))
|
||
(while (setq minute (pop minutes))
|
||
;; Ouch! Here, we've got a complete valid
|
||
;; schedule. It's a good one if it's in the
|
||
;; future.
|
||
(let ((time (encode-time 0 minute hour day
|
||
month year
|
||
time-zone)))
|
||
(and (time-less-p now time)
|
||
(throw 'found time)))
|
||
))))
|
||
))
|
||
)))
|
||
))
|
||
(nndiary-last-occurence sched))
|
||
;; else
|
||
(nndiary-last-occurence sched))
|
||
))
|
||
|
||
(defun nndiary-expired-article-p (file)
|
||
(with-temp-buffer
|
||
(if (nnheader-insert-head file)
|
||
(let ((sched (nndiary-schedule)))
|
||
;; An article has expired if its last schedule (if any) is in the
|
||
;; past. A permanent schedule never expires.
|
||
(and sched
|
||
(setq sched (nndiary-last-occurence sched))
|
||
(time-less-p sched (current-time))))
|
||
;; else
|
||
(nnheader-report 'nndiary "Could not read file %s" file)
|
||
nil)
|
||
))
|
||
|
||
(defun nndiary-renew-article-p (file timestamp)
|
||
(erase-buffer)
|
||
(if (nnheader-insert-head file)
|
||
(let ((now (current-time))
|
||
(sched (nndiary-schedule)))
|
||
;; The article should be re-considered as unread if there's a reminder
|
||
;; between the group timestamp and the current time.
|
||
(when (and sched (setq sched (nndiary-next-occurence sched now)))
|
||
(let ((reminders ;; add the next occurence itself at the end.
|
||
(append (nndiary-compute-reminders sched) (list sched))))
|
||
(while (and reminders (time-less-p (car reminders) timestamp))
|
||
(pop reminders))
|
||
;; The reminders might be empty if the last date is in the past,
|
||
;; or we've got at least the next occurence itself left. All past
|
||
;; dates are renewed.
|
||
(or (not reminders)
|
||
(time-less-p (car reminders) now)))
|
||
))
|
||
;; else
|
||
(nnheader-report 'nndiary "Could not read file %s" file)
|
||
nil))
|
||
|
||
;; The end... ===============================================================
|
||
|
||
(dolist (header nndiary-headers)
|
||
(setq header (intern (format "X-Diary-%s" (car header))))
|
||
;; Required for building NOV databases and some other stuff.
|
||
(add-to-list 'gnus-extra-headers header)
|
||
(add-to-list 'nnmail-extra-headers header))
|
||
|
||
(unless (assoc "nndiary" gnus-valid-select-methods)
|
||
(gnus-declare-backend "nndiary" 'post-mail 'respool 'address))
|
||
|
||
(provide 'nndiary)
|
||
|
||
|
||
;; arch-tag: 9c542b95-92e7-4ace-a038-330ab296e203
|
||
;;; nndiary.el ends here
|