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+;;; belf.el -- Bookshelf, ebook library management -*- lexical-binding: t -*-
+
+;; Copyright (C) 2025  Free Software Foundation, Inc.
+
+;; Author: Yuchen Pei <id@ypei.org>
+;; Package-Requires: ((emacs "29.4"))
+
+;; This file is part of dotted.
+
+;; dotted is free software: you can redistribute it and/or modify it under
+;; the terms of the GNU Affero General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; dotted 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 Affero General
+;; Public License for more details.
+
+;; You should have received a copy of the GNU Affero General Public
+;; License along with dotted.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Bookshelf, ebook library management.
+
+;;; Code:
+
+(require 'tabulated-list)
+
+(define-derived-mode belf-mode tabulated-list-mode "Bookshelf"
+  "Major mode for browsing a list of books."
+  (setq tabulated-list-format
+        [("Authors" 25 t)
+         ("Title" 48 t)
+         ("Year" 4 t)])
+  (setq tabulated-list-padding 2)
+  (tabulated-list-init-header)
+  (setq revert-buffer-function #'belf-list-refresh-contents)
+  (hl-line-mode))
+
+(defun belf-list-books ()
+  (interactive)
+  (let ((buf (get-buffer-create "*Bookshelf*")))
+    (with-current-buffer buf
+      (belf-mode)
+      (belf-list-refresh-contents)
+      (tabulated-list-print))
+    (pop-to-buffer-same-window buf)))
+
+(defun belf-list-refresh-contents (&rest _)
+  (setq-local tabulated-list-entries (belf-parse-all-file-names)))
+
+(defvar belf-dir "~/Documents" "Directory of books.")
+
+(defun belf-parse-all-file-names ()
+  (seq-filter
+   #'identity
+   (seq-map-indexed
+    (lambda (f i)
+      (when-let ((parsed (belf-parse-file-name f)))
+        (let-alist parsed
+          (list i (vector .authors .title .year)))))
+    (directory-files belf-dir))))
+
+(defun belf-parse-file-name (file-name)
+  (let ((base (file-name-base file-name)))
+    (when (string-match "^\\(.*?\\) - \\(.*\\) (\\([0-9]*\\))" base)
+      `((authors . ,(match-string 1 base))
+        (title . ,(match-string 2 base))
+        (year . ,(match-string 3 base))))))
+
+(provide 'belf)