--- /dev/null
+;;; gnus-agent.el --- Legacy unplugged support for Gnus
+
+;; Copyright (C) 2004-2016 Free Software Foundation, Inc.
+
+;; Author: Kevin Greiner <kgreiner@xpediantsolutions.com>
+;; Keywords: news
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Conversion functions for the Agent.
+
+;;; Code:
+(require 'gnus-start)
+(require 'gnus-util)
+(require 'gnus-range)
+(require 'gnus-agent)
+
+;; Oort Gnus v0.08 - This release updated agent to no longer use
+;; history file and to support a compressed alist.
+
+(defvar gnus-agent-compressed-agentview-search-only nil)
+
+(defun gnus-agent-convert-to-compressed-agentview (converting-to)
+ "Iterates over all agentview files to ensure that they have been
+converted to the compressed format."
+
+ (let ((search-in (list gnus-agent-directory))
+ here
+ members
+ member
+ converted-something)
+ (while (setq here (pop search-in))
+ (setq members (directory-files here t))
+ (while (setq member (pop members))
+ (cond ((string-match "/\\.\\.?$" member)
+ nil)
+ ((file-directory-p member)
+ (push member search-in))
+ ((equal (file-name-nondirectory member) ".agentview")
+ (setq converted-something
+ (or (gnus-agent-convert-agentview member)
+ converted-something))))))
+
+ (if converted-something
+ (gnus-message 4 "Successfully converted Gnus %s offline (agent) files to %s" gnus-newsrc-file-version converting-to))))
+
+(defun gnus-agent-convert-to-compressed-agentview-prompt ()
+ (catch 'found-file-to-convert
+ (let ((gnus-agent-compressed-agentview-search-only t))
+ (gnus-agent-convert-to-compressed-agentview nil))))
+
+(gnus-convert-mark-converter-prompt 'gnus-agent-convert-to-compressed-agentview 'gnus-agent-convert-to-compressed-agentview-prompt)
+
+(defun gnus-agent-convert-agentview (file)
+ "Load FILE and do a `read' there."
+ (with-temp-buffer
+ (nnheader-insert-file-contents file)
+ (goto-char (point-min))
+ (let ((inhibit-quit t)
+ (alist (read (current-buffer)))
+ (version (condition-case nil (read (current-buffer))
+ (end-of-file 0)))
+ changed-version
+ history-file)
+
+ (cond
+ ((= version 0)
+ (let (entry
+ (gnus-command-method nil))
+ (mm-disable-multibyte) ;; everything is binary
+ (erase-buffer)
+ (insert "\n")
+ (let ((file (concat (file-name-directory file) "/history")))
+ (when (file-exists-p file)
+ (nnheader-insert-file-contents file)
+ (setq history-file file)))
+
+ (goto-char (point-min))
+ (while (not (eobp))
+ (if (and (looking-at
+ "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
+ (string= (gnus-agent-article-name ".agentview" (match-string 2))
+ file)
+ (setq entry (assoc (string-to-number (match-string 3)) alist)))
+ (setcdr entry (string-to-number (match-string 1))))
+ (forward-line 1))
+ (setq changed-version t)))
+ ((= version 1)
+ (setq changed-version t)))
+
+ (when changed-version
+ (when gnus-agent-compressed-agentview-search-only
+ (throw 'found-file-to-convert t))
+
+ (erase-buffer)
+ (let (article-id day-of-download comp-list compressed)
+ (while alist
+ (setq article-id (caar alist)
+ day-of-download (cdar alist)
+ comp-list (assq day-of-download compressed)
+ alist (cdr alist))
+ (if comp-list
+ (setcdr comp-list (cons article-id (cdr comp-list)))
+ (push (list day-of-download article-id) compressed)))
+ (setq alist compressed)
+ (while alist
+ (setq comp-list (pop alist))
+ (setcdr comp-list
+ (gnus-compress-sequence (nreverse (cdr comp-list)))))
+ (princ compressed (current-buffer)))
+ (insert "\n2\n")
+ (write-file file)
+ (when history-file
+ (delete-file history-file))
+ t))))
+
+;; End of Oort Gnus v0.08 updates
+
+;; No Gnus v0.3 - This release provides a mechanism for upgrading gnus
+;; from previous versions. Therefore, the previous
+;; hacks to handle a gnus-agent-expire-days that
+;; specifies a list of values can be removed.
+
+(defun gnus-agent-unlist-expire-days (converting-to)
+ (when (listp gnus-agent-expire-days)
+ (let (buffer)
+ (unwind-protect
+ (save-window-excursion
+ (setq buffer (gnus-get-buffer-create " *Gnus agent upgrade*"))
+ (set-buffer buffer)
+ (erase-buffer)
+ (insert "The definition of gnus-agent-expire-days has been changed.\nYou currently have it set to the list:\n ")
+ (gnus-pp gnus-agent-expire-days)
+
+ (insert
+ (gnus-format-message
+ "\nIn order to use version `%s' of gnus, you will need to set\n"
+ converting-to))
+ (insert "gnus-agent-expire-days to an integer. If you still wish to set different\n")
+ (insert "expiration days to individual groups, you must instead set the\n")
+ (insert (gnus-format-message
+ "`agent-days-until-old' group and/or topic parameter.\n"))
+ (insert "\n")
+ (insert "If you would like, gnus can iterate over every group comparing its name to the\n")
+ (insert "regular expressions that you currently have in gnus-agent-expire-days. When\n")
+ (insert (gnus-format-message
+ "gnus finds a match, it will update that group's `agent-days-until-old' group\n"))
+ (insert "parameter to the value associated with the regular expression.\n")
+ (insert "\n")
+ (insert "Whether gnus assigns group parameters, or not, gnus will terminate with an\n")
+ (insert "ERROR as soon as this function completes. The reason is that you must\n")
+ (insert "manually edit your configuration to either not set gnus-agent-expire-days or\n")
+ (insert "to set it to an integer before gnus can be used.\n")
+ (insert "\n")
+ (insert "Once you have successfully edited gnus-agent-expire-days, gnus will be able to\n")
+ (insert "execute past this function.\n")
+ (insert "\n")
+ (insert "Should gnus use gnus-agent-expire-days to assign\n")
+ (insert "agent-days-until-old parameters to individual groups? (Y/N)")
+
+ (switch-to-buffer buffer)
+ (beep)
+ (beep)
+
+ (let ((echo-keystrokes 0)
+ c)
+ (while (progn (setq c (read-char-exclusive))
+ (cond ((or (eq c ?y) (eq c ?Y))
+ (save-excursion
+ (let ((groups (gnus-group-listed-groups)))
+ (while groups
+ (let* ((group (pop groups))
+ (days gnus-agent-expire-days)
+ (day (catch 'found
+ (while days
+ (when (eq 0 (string-match
+ (caar days)
+ group))
+ (throw 'found (cadr (car days))))
+ (setq days (cdr days)))
+ nil)))
+ (when day
+ (gnus-group-set-parameter group 'agent-days-until-old
+ day))))))
+ nil
+ )
+ ((or (eq c ?n) (eq c ?N))
+ nil)
+ (t
+ t))))))
+ (kill-buffer buffer))
+ (error "Change gnus-agent-expire-days to an integer for gnus to start"))))
+
+;; The gnus-agent-unlist-expire-days has its own conversion prompt.
+;; Therefore, hide the default prompt.
+(gnus-convert-mark-converter-prompt 'gnus-agent-unlist-expire-days t)
+
+(defun gnus-agent-unhook-expire-days (converting-to)
+ "Remove every lambda from `gnus-group-prepare-hook' that mention the
+symbol `gnus-agent-do-once' in their definition. This should NOT be
+necessary as gnus-agent.el no longer adds them. However, it is
+possible that the hook was persistently saved."
+ (let ((h t)) ; Iterate from bgn of hook.
+ (while h
+ (let ((func (progn (when (eq h t)
+ ;; Init h to list of functions.
+ (setq h (cond ((listp gnus-group-prepare-hook)
+ gnus-group-prepare-hook)
+ ((boundp 'gnus-group-prepare-hook)
+ (list gnus-group-prepare-hook)))))
+ (pop h))))
+
+ (when (cond ((byte-code-function-p func)
+ ;; Search def. of compiled function for
+ ;; gnus-agent-do-once string.
+ (let* (definition
+ print-level
+ print-length
+ (standard-output
+ (lambda (char)
+ (setq definition (cons char definition)))))
+ (princ func) ; Populates definition with reversed list
+ ; of characters.
+ (let* ((i (length definition))
+ (s (make-string i 0)))
+ (while definition
+ (aset s (setq i (1- i)) (pop definition)))
+
+ (string-match "\\bgnus-agent-do-once\\b" s))))
+ ((listp func)
+ (eq (cadr (nth 2 func)) 'gnus-agent-do-once) ; Handles eval'd lambda.
+ ))
+
+ (remove-hook 'gnus-group-prepare-hook func)
+ ;; I don't what remove-hook is going to actually do to the
+ ;; hook list so start over from the beginning.
+ (setq h t))))))
+
+;; gnus-agent-unhook-expire-days is safe in that it does not modify
+;; the .newsrc.eld file.
+(gnus-convert-mark-converter-prompt 'gnus-agent-unhook-expire-days t)
+
+(provide 'legacy-gnus-agent)
+
+;;; legacy-gnus-agent.el ends here
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