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;;; rt-liberation-viewer.el --- Emacs interface to RT -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Free Software Foundation, Inc.
;;
;; Authors: 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.
;;; Comments:
;; By the end of 2020 is was clear that a more robust way of viewing
;; tickets was preferable.
;;; Code:
(require 'rt-liberation)
(defconst rt-liber-viewer-font-lock-keywords
(let ((header-regexp (regexp-opt '("id: " "Ticket: " "TimeTaken: "
"Type: " "Field: " "OldValue: "
"NewValue: " "Data: "
"Description: " "Created: "
"Creator: " "Attachments: ") t)))
(list
(list (concat "^" header-regexp ".*$") 0
'font-lock-comment-face)))
"Expressions to font-lock for RT ticket viewer.")
(defun rt-liber-jump-to-latest-correspondence ()
"Move point to the newest correspondence section."
(interactive)
(let (latest-point)
(save-excursion
(goto-char (point-max))
(when (re-search-backward rt-liber-correspondence-regexp
(point-min) t)
(setq latest-point (point))))
(if latest-point
(progn
(goto-char latest-point)
(rt-liber-next-section-in-viewer))
(message "no correspondence found"))))
(defun rt-liber-viewer-visit-in-browser ()
"Visit this ticket in the RT Web interface."
(interactive)
(let ((id (rt-liber-ticket-id-only rt-liber-ticket-local)))
(if id
(browse-url
(concat rt-liber-base-url "Ticket/Display.html?id=" id))
(error "no ticket currently in view"))))
(defun rt-liber-display-ticket-history (ticket-alist &optional assoc-browser)
"Display history for ticket.
TICKET-ALIST alist of ticket data.
ASSOC-BROWSER if non-nil should be a ticket browser."
(let* ((ticket-id (rt-liber-ticket-id-only ticket-alist))
(contents (rt-liber-rest-run-ticket-history-base-query ticket-id))
(new-ticket-buffer (get-buffer-create
(concat "*RT Ticket #" ticket-id "*"))))
(with-current-buffer new-ticket-buffer
(let ((inhibit-read-only t))
(erase-buffer)
(insert contents)
(goto-char (point-min))
(rt-liber-viewer-mode)
(set
(make-local-variable 'rt-liber-ticket-local)
ticket-alist)
(when assoc-browser
(set
(make-local-variable 'rt-liber-assoc-browser)
assoc-browser))
(set-buffer-modified-p nil)
(setq buffer-read-only t)))
(switch-to-buffer new-ticket-buffer)))
(defun rt-liber-viewer-mode-quit ()
"Bury the ticket viewer."
(interactive)
(bury-buffer))
(defun rt-liber-viewer-show-ticket-browser ()
"Return to the ticket browser buffer."
(interactive)
(let ((id (rt-liber-ticket-id-only rt-liber-ticket-local)))
(if id
(let ((target-buffer
(if rt-liber-assoc-browser
(buffer-name rt-liber-assoc-browser)
(buffer-name rt-liber-browser-buffer-name))))
(if target-buffer
(switch-to-buffer target-buffer)
(error "associated ticket browser buffer no longer exists"))
(rt-liber-browser-move-point-to-ticket id))
(error "no ticket currently in view"))))
(defun rt-liber-next-section-in-viewer ()
"Move point to next section."
(interactive)
(forward-line 1)
(when (not (re-search-forward rt-liber-content-regexp (point-max) t))
(message "no next section"))
(goto-char (point-at-bol)))
(defun rt-liber-previous-section-in-viewer ()
"Move point to previous section."
(interactive)
(forward-line -1)
(when (not (re-search-backward rt-liber-content-regexp (point-min) t))
(message "no previous section"))
(goto-char (point-at-bol)))
(defconst rt-liber-viewer-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "q") 'rt-liber-viewer-mode-quit)
(define-key map (kbd "n") 'rt-liber-next-section-in-viewer)
(define-key map (kbd "N") 'rt-liber-jump-to-latest-correspondence)
(define-key map (kbd "p") 'rt-liber-previous-section-in-viewer)
(define-key map (kbd "V") 'rt-liber-viewer-visit-in-browser)
(define-key map (kbd "m") 'rt-liber-viewer-answer)
(define-key map (kbd "M") 'rt-liber-viewer-answer-this)
(define-key map (kbd "t") 'rt-liber-viewer-answer-provisionally)
(define-key map (kbd "T") 'rt-liber-viewer-answer-provisionally-this)
(define-key map (kbd "F") 'rt-liber-viewer-answer-verbatim-this)
(define-key map (kbd "c") 'rt-liber-viewer-comment)
(define-key map (kbd "C") 'rt-liber-viewer-comment-this)
(define-key map (kbd "g") 'revert-buffer)
(define-key map (kbd "SPC") 'scroll-up)
(define-key map (kbd "DEL") 'scroll-down)
(define-key map (kbd "h") 'rt-liber-viewer-show-ticket-browser)
map)
"Key map for ticket viewer.")
(define-derived-mode rt-liber-viewer-mode nil
"RT Liberation Viewer"
"Major Mode for viewing RT tickets.
\\{rt-liber-viewer-mode-map}"
(set
(make-local-variable 'font-lock-defaults)
'((rt-liber-viewer-font-lock-keywords)))
(set (make-local-variable 'revert-buffer-function)
#'rt-liber-refresh-ticket-history)
(set (make-local-variable 'buffer-stale-function)
(lambda (&optional _noconfirm) 'slow))
(when rt-liber-jump-to-latest
(rt-liber-jump-to-latest-correspondence))
(run-hooks 'rt-liber-viewer-hook))
(defun rt-liber-refresh-ticket-history (&optional _ignore-auto _noconfirm)
(interactive)
(if rt-liber-ticket-local
(rt-liber-display-ticket-history rt-liber-ticket-local
rt-liber-assoc-browser)
(error "not viewing a ticket")))
;; wrapper functions around specific functions provided by a backend
(declare-function
rt-liber-gnus-compose-reply-to-requestor
"rt-liberation-gnus.el")
(declare-function
rt-liber-gnus-compose-reply-to-requestor-to-this
"rt-liberation-gnus.el")
(declare-function
rt-liber-gnus-compose-reply-to-requestor-verbatim-this
"rt-liberation-gnus.el")
(declare-function
rt-liber-gnus-compose-provisional
"rt-liberation-gnus.el")
(declare-function
rt-liber-gnus-compose-provisional-to-this
"rt-liberation-gnus.el")
(declare-function
rt-liber-gnus-compose-comment
"rt-liberation-gnus.el")
(declare-function
rt-liber-gnus-compose-comment-this
"rt-liberation-gnus.el")
(defun rt-liber-viewer-answer ()
"Answer the ticket."
(interactive)
(cond ((featurep 'rt-liberation-gnus)
(rt-liber-gnus-compose-reply-to-requestor))
(t (error "no function defined"))))
(defun rt-liber-viewer-answer-this ()
"Answer the ticket using the current context."
(interactive)
(cond ((featurep 'rt-liberation-gnus)
(rt-liber-gnus-compose-reply-to-requestor-to-this))
(t (error "no function defined"))))
(defun rt-liber-viewer-answer-verbatim-this ()
"Answer the ticket using the current context verbatim."
(interactive)
(cond ((featurep 'rt-liberation-gnus)
(rt-liber-gnus-compose-reply-to-requestor-verbatim-this))
(t (error "no function defined"))))
(defun rt-liber-viewer-answer-provisionally ()
"Provisionally answer the ticket."
(interactive)
(cond ((featurep 'rt-liberation-gnus)
(rt-liber-gnus-compose-provisional))
(t (error "no function defined"))))
(defun rt-liber-viewer-answer-provisionally-this ()
"Provisionally answer the ticket using the current context."
(interactive)
(cond ((featurep 'rt-liberation-gnus)
(rt-liber-gnus-compose-provisional-to-this))
(t (error "no function defined"))))
(defun rt-liber-viewer-comment ()
"Comment on the ticket."
(interactive)
(cond ((featurep 'rt-liberation-gnus)
(rt-liber-gnus-compose-comment))
(t (error "no function defined"))))
(defun rt-liber-viewer-comment-this ()
"Comment on the ticket using the current context."
(interactive)
(cond ((featurep 'rt-liberation-gnus)
(rt-liber-gnus-compose-comment-this))
(t (error "no function defined"))))
(provide 'rt-liberation-viewer)
;;; rt-liberation-viewer.el ends here.
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