+;; Marks handling
+
+(defun nntp-marks-directory (server)
+ (expand-file-name server nntp-marks-directory))
+
+(defvar nntp-server-to-method-cache nil
+ "Alist of servers and select methods.")
+
+(defun nntp-group-pathname (server group &optional file)
+ "Return an absolute file name of FILE for GROUP on SERVER."
+ (let ((method (cdr (assoc server nntp-server-to-method-cache))))
+ (unless method
+ (push (cons server (setq method (or (gnus-server-to-method server)
+ (gnus-find-method-for-group group))))
+ nntp-server-to-method-cache))
+ (nnmail-group-pathname
+ (mm-decode-coding-string group
+ (inline (gnus-group-name-charset method group)))
+ (nntp-marks-directory server)
+ file)))
+
+(defun nntp-possibly-create-directory (group server)
+ (let ((dir (nntp-group-pathname server group))
+ (file-name-coding-system nnmail-pathname-coding-system))
+ (unless (file-exists-p dir)
+ (make-directory (directory-file-name dir) t)
+ (nnheader-message 5 "Creating nntp marks directory %s" dir))))
+
+(autoload 'time-less-p "time-date")
+
+(defun nntp-marks-changed-p (group server)
+ (let ((file (nntp-group-pathname server group nntp-marks-file-name))
+ (file-name-coding-system nnmail-pathname-coding-system))
+ (if (null (gnus-gethash file nntp-marks-modtime))
+ t ;; never looked at marks file, assume it has changed
+ (time-less-p (gnus-gethash file nntp-marks-modtime)
+ (nth 5 (file-attributes file))))))
+
+(defun nntp-save-marks (group server)
+ (let ((file-name-coding-system nnmail-pathname-coding-system)
+ (file (nntp-group-pathname server group nntp-marks-file-name)))
+ (condition-case err
+ (progn
+ (nntp-possibly-create-directory group server)
+ (with-temp-file file
+ (erase-buffer)
+ (gnus-prin1 nntp-marks)
+ (insert "\n"))
+ (gnus-sethash file
+ (nth 5 (file-attributes file))
+ nntp-marks-modtime))
+ (error (or (gnus-yes-or-no-p
+ (format "Could not write to %s (%s). Continue? " file err))
+ (error "Cannot write to %s (%s)" file err))))))
+
+(defun nntp-open-marks (group server)
+ (let ((file (nntp-group-pathname server group nntp-marks-file-name))
+ (file-name-coding-system nnmail-pathname-coding-system))
+ (if (file-exists-p file)
+ (condition-case err
+ (with-temp-buffer
+ (gnus-sethash file (nth 5 (file-attributes file))
+ nntp-marks-modtime)
+ (nnheader-insert-file-contents file)
+ (setq nntp-marks (read (current-buffer)))
+ (dolist (el gnus-article-unpropagated-mark-lists)
+ (setq nntp-marks (gnus-remassoc el nntp-marks))))
+ (error (or (gnus-yes-or-no-p
+ (format "Error reading nntp marks file %s (%s). Continuing will use marks from .newsrc.eld. Continue? " file err))
+ (error "Cannot read nntp marks file %s (%s)" file err))))
+ ;; User didn't have a .marks file. Probably first time
+ ;; user of the .marks stuff. Bootstrap it from .newsrc.eld.
+ (let ((info (gnus-get-info
+ (gnus-group-prefixed-name
+ group
+ (gnus-server-to-method (format "nntp:%s" server)))))
+ (decoded-name (mm-decode-coding-string
+ group
+ (gnus-group-name-charset
+ (gnus-server-to-method server) group))))
+ (nnheader-message 7 "Bootstrapping marks for %s..." decoded-name)
+ (setq nntp-marks (gnus-info-marks info))
+ (push (cons 'read (gnus-info-read info)) nntp-marks)
+ (dolist (el gnus-article-unpropagated-mark-lists)
+ (setq nntp-marks (gnus-remassoc el nntp-marks)))
+ (nntp-save-marks group server)
+ (nnheader-message 7 "Bootstrapping marks for %s...done"
+ decoded-name)))))
+