WIP: Bufler support

ement-bufler.el

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+;;; ement-bufler.el --- Bufler integration for Ement  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2021  Adam Porter
+
+;; Author: Adam Porter <adam@alphapapa.net>
+;; Keywords:
+
+;; 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, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;
+
+;;; Code:
+
+;;;; Requirements
+
+(require 'bufler)
+
+;;;; Variables
+
+
+;;;; Customization
+
+
+;;;; Commands
+
+(defun ement-bufler-list ()
+  "List room buffers with `bufler'.
+Only rooms which have a live buffer are shown."
+  (interactive)
+  (let ((buffer (get-buffer "*Ement Bufler List*")))
+    (unless buffer
+      (with-current-buffer (setf buffer (get-buffer-create "*Ement Bufler List*"))
+        (setq-local bufler-groups
+                    (bufler-defgroups
+                      (group (group-or "Ement"
+                                       (mode-match "Rooms" "ement-room-mode")
+                                       (name-match "Other" (rx bos "*Ement")))
+                             (group
+                              (group-and "unread"
+                                         #'buffer-modified-p))
+                             (group (lambda (buffer)
+                                      (when (buffer-local-value 'ement-room buffer)
+                                        (when (ement-room--direct-p (buffer-local-value 'ement-room buffer)
+                                                                    (buffer-local-value 'ement-session buffer))
+                                          "Direct"))))
+                             (lambda (buffer)
+                               (when (buffer-local-value 'ement-room buffer)
+                                 (let ((test-against (replace-regexp-in-string
+                                                      (rx ":" (1+ (not (any ":"))) eos) ""
+                                                      (or (ement-room-canonical-alias (buffer-local-value 'ement-room buffer))
+                                                          (ement-room-id (buffer-local-value 'ement-room buffer))))))
+                                   (cl-flet ((matches (pattern) (string-match-p pattern test-against)))
+                                     (cond ((matches (rx (or "emacs" "org-mode" "ement.el")))
+                                            "Emacs")
+                                           ((matches "matrix")
+                                            "Matrix")))))))))
+        (setq-local bufler-use-cache nil)
+        (setq-local bufler-filter-buffer-fns
+                    (list (lambda (buffer)
+                            (not (eq 'ement-room-mode (buffer-local-value 'major-mode buffer))))))))
+    (with-current-buffer buffer
+      (bufler-list :list-buffer buffer))))
+
+;;;; Functions
+
+
+;;;; Footer
+
+(provide 'ement-bufler)
+
+;;; ement-bufler.el ends here