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;;; rt-liberation-storage.el --- Storage backend for rt-liberation
;; Copyright (C) 2010 Free Software Foundation, Inc.
;;
;; Author: Yoni Rabkin <yrk@gnu.org>
;;
;; This file is a part of rt-liberation.
;;
;; 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 3 of the
;; License, 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; if not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
;; MA 02111-1307, USA.
;;; Code:
(require 'rt-liberation)
(defvar rt-liber-store nil
"In memory storage for ticket metadata.")
(defvar rt-liber-store-file "ticket_metadata"
"File name for storing ticket metadata.")
(defvar rt-liber-ancillary-format-f 'rt-liber-ancillary-format-f
"Default formatting function for ancillary data.")
(defun rt-liber-store-write ()
"Write `rt-liber-store' to permanent storage."
(when (and (stringp rt-liber-directory)
(not (file-exists-p rt-liber-directory)))
(make-directory rt-liber-directory))
(when (hash-table-p rt-liber-store)
(with-temp-buffer
(insert (format "%s" rt-liber-store))
(insert "\n")
(write-file
(concat (file-name-as-directory rt-liber-directory)
rt-liber-store-file)))))
(defun rt-liber-store-read ()
"Populate `rt-liber-store' from permanent storage."
(let ((file (concat (file-name-as-directory rt-liber-directory)
rt-liber-store-file)))
(when (file-exists-p file)
(setq rt-liber-store
(with-temp-buffer
(insert-file-contents file)
(read (current-buffer)))))))
(defun rt-liber-store-load ()
"Ensure that the store has been loaded."
(when (not (hash-table-p rt-liber-store))
(rt-liber-store-read)))
(defun rt-liber-store-ticket-property (key value ticket-id)
"Relate KEY and VALUE to TICKET-ID."
(rt-liber-store-load)
(let ((existing (gethash ticket-id rt-liber-store)))
(when (not existing)
(setq existing (make-hash-table :test 'equal)))
(puthash key value existing)
(puthash ticket-id existing rt-liber-store)
(rt-liber-store-write)))
;;; ------------------------------------------------------------------
;;; Interface
;;; ------------------------------------------------------------------
(defun rt-liber-set-ancillary-text (text)
"Store ancillary string TEXT for the ticket at point."
(let ((id (rt-liber-browser-ticket-id-at-point))
(inhibit-read-only t)
message)
(rt-liber-store-ticket-property "text" text id)
(if (and rt-liber-ticket-list rt-liber-query)
(rt-liber-ticketlist-browser-redraw
rt-liber-ticket-list rt-liber-query)
(setq message " (refresh ticket-browser to see changes)"))
(rt-liber-browser-move-point-to-ticket id)
(minibuffer-message "stored text for ticket %s%s"
id (or message ""))))
(defun rt-liber-get-ancillary-text (ticket-id)
"Return the TEXT field for TICKET-ID or an empty string."
(rt-liber-store-load)
(let ((existing (gethash ticket-id rt-liber-store)))
(if existing
(or (gethash "text" existing) "")
"")))
(defun rt-liber-ancillary-format-f (ticket-id)
"Default formatting function for ancillary data."
(rt-liber-get-ancillary-text ticket-id))
(defun rt-liber-get-anc (ticket-id)
"Return formatted ancillary data string for ticket TICKET-ID."
(funcall rt-liber-ancillary-format-f ticket-id))
(provide 'rt-liberation-storage)
;;; rt-liberation-storage.el ends here.
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