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;; jao-maildir.el -- Utilities for reading maildirs -*- lexical-binding: t; -*-
;; Copyright (c) 2019, 2020 jao
;; Author: jao <mail@jao.io>
;; Start date: Sun Dec 01, 2019 15:48
;; Keywords: mail
;; This file 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, or (at your option)
;; any later version.
;; This file 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; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Comentary:
;; Inspecting the contents of maildirs and reporting it.
;;; Code:
(require 'seq)
(require 'jao-minibuffer)
(defvar jao-maildirs nil)
(defvar jao-maildir-counts nil)
(defvar jao-maildir-debug-p nil)
(defvar jao-maildir-echo-p t)
(defvar jao-maildir-tracked-maildirs nil)
(defun jao-maildir--maildir-new (mbox) (expand-file-name "new" mbox))
(defun jao-maildir--maildir-new-count (mbox)
(- (length (directory-files (jao-maildir--maildir-new mbox))) 2))
(defun jao-maildir--update-counts ()
(dolist (mbox jao-maildirs)
(puthash mbox (jao-maildir--maildir-new-count mbox) jao-maildir-counts)))
(defun jao-maildir--init-counts (maildirs)
(setq jao-maildir-counts (make-hash-table :test 'equal))
(setq jao-maildirs maildirs)
(jao-maildir--update-counts)
(jao-maildir--update-info-string t))
(defvar jao-maildir-tracked-maildirs)
(defvar jao-maildir-info-string "")
(defgroup jao-maildir-faces nil "Faces"
:group 'faces)
(defface jao-maildir-emph '((t :inherit font-lock-keyword-face))
"Face used to highlihgt non-boring tracked maildirs"
:group 'jao-maildir-faces)
(defun jao-maildir--tracked-count (track)
(let ((rx (car track)))
(seq-reduce (lambda (c k)
(if (string-match-p rx k) (+ c (gethash k jao-maildir-counts 0)) c))
(hash-table-keys jao-maildir-counts)
0)))
(defvar jao-maildir--track-strings ())
(defun jao-maildir--update-track-string (mbox)
(when-let ((track (seq-find (lambda (td)
(string-match-p (car td) mbox))
jao-maildir-tracked-maildirs)))
(let* ((label (cadr track))
(other (assoc-delete-all label jao-maildir--track-strings))
(cnt (jao-maildir--tracked-count track)))
(if (> cnt 0)
(let* ((face (caddr track))
(am (format "%s%s" label cnt))
(face1 (if (eq t face) 'jao-maildir-emph face))
(str (cons label (if face (propertize am 'face face1) am))))
(setq jao-maildir--track-strings
(if face (cons str other) (append other (list str)))))
(setq jao-maildir--track-strings other)))))
(defun jao-maildir--update-info-string (&optional mbox)
(cond ((eq mbox t) (seq-do 'jao-maildir--update-track-string jao-maildirs))
((stringp mbox) (jao-maildir--update-track-string mbox)))
(let ((s (mapconcat 'identity (mapcar 'cdr jao-maildir--track-strings) " ")))
(setq jao-maildir-info-string (if (string-blank-p s) "" (concat s " "))))
(when jao-maildir-echo-p (jao-minibuffer-refresh)))
(defvar jao-maildir--watches nil)
(defun jao-maildir-cancel-watchers ()
(dolist (w jao-maildir--watches) (file-notify-rm-watch w))
(setq jao-maildir--watches nil))
(defun jao-maildir--log-watch (mbox e)
(when jao-maildir-debug-p
(message "[%s] watch: %s: %s" (current-time-string) mbox e)))
(defun jao-maildir--watcher (mbox cb)
(lambda (e)
(jao-maildir--log-watch e mbox)
(when (memq (cadr e) '(created deleted))
(puthash mbox (jao-maildir--maildir-new-count mbox) jao-maildir-counts)
(jao-maildir--update-info-string mbox)
(when cb (funcall cb mbox)))))
(defun jao-maildir--setup-watches (cb)
(jao-maildir-cancel-watchers)
(setq jao-maildir--watches
(mapcar (lambda (mbox)
(file-notify-add-watch (jao-maildir--maildir-new mbox)
'(change attribute-change)
(jao-maildir--watcher mbox cb)))
jao-maildirs)))
;;;###autoload
(defun jao-maildir-setup (maildirs mode-line &optional cb)
(jao-maildir--init-counts maildirs)
(cond ((eq 'mode-line mode-line)
(add-to-list 'global-mode-string 'jao-maildir-info-string t))
(mode-line
(jao-minibuffer-add-variable 'jao-maildir-info-string)
(jao-maildir--update-info-string)))
(jao-maildir--setup-watches cb))
(provide 'jao-maildir)
;;; jao-maildir.el ends here
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