[emacs] Add dired utility to rename epubs

Also extracted some functions to a new my-epub

2 files changed, 98 insertions, 49 deletions

diff --git a/emacs/.emacs.d/lisp/my/belf.el b/emacs/.emacs.d/lisp/my/belf.el
index 980cd3e..0db79f6 100644
--- a/emacs/.emacs.d/lisp/my/belf.el
+++ b/emacs/.emacs.d/lisp/my/belf.el
@@ -28,6 +28,7 @@
 
 (require 'tabulated-list)
 (require 'infobox)
+(require 'my-epub)
 
 (defvar-keymap belf-mode-map
   :parent tabulated-list-mode-map
@@ -150,47 +151,21 @@ foo bar & quux, baf"
     (belf-epub-rename epub new-dir)))
 
 (defun belf-epub-rename (file-name new-dir)
-  (when-let ((content-file-name (belf-epub-content-file-name file-name)))
-    (with-temp-buffer
-      (call-process "unzip" nil t nil "-p" file-name content-file-name)
-      (let* ((dom (libxml-parse-xml-region (point-min) (point-max)))
-             (metadata (dom-by-tag dom 'metadata))
-             (title (dom-text (dom-by-tag metadata 'title)))
-             (authors (dom-texts (dom-by-tag metadata 'creator) ", "))
-             (identifier
-              (replace-regexp-in-string
-               "[^0-9,]" ""
-               (dom-texts
-                (seq-filter
-                 (lambda (node)
-                   (or (equal "ISBN" (dom-attr node 'scheme))
-                       (string-match-p "^[0-9]+$" (dom-text node))))
-                 (dom-by-tag metadata 'identifier))
-                ",")))
-             (date (replace-regexp-in-string
-                    "[^0-9]" ""
-                    (dom-text (dom-by-tag metadata 'date))))
-             (year (substring date 0 (min 4 (length date))))
-             (dir (file-name-directory file-name))
-             (new-base-name (belf-format-base-name
-                             `((title . ,title)
-                               (authors . ,authors)
-                               (year . ,year)
-                               (identifier . ,identifier))
-                             new-dir))
-             new-name)
-        ;; (pp metadata)
-        (dolist (file (directory-files dir t
-                                       (format "^%s\\.[a-zA-Z0-9]+$"
-                                               (regexp-quote
-                                                (file-name-base file-name)))))
-          (setq new-name (format "%s.%s" new-base-name (file-name-extension file)))
-          (unless (equal file-name new-name)
-            (message "%s -> %s" file new-name)
-            (ignore-error 'file-already-exists (rename-file file new-name))
-            )
+  (when-let ((meta (my-epub-metadata file-name)))
+    (let* ((dir (file-name-directory file-name))
+           (new-base-name (belf-format-base-name meta new-dir))
+           new-name)
+      (dolist (file (directory-files dir t
+                                     (format "^%s\\.[a-zA-Z0-9]+$"
+                                             (regexp-quote
+                                              (file-name-base file-name)))))
+        (setq new-name (format "%s.%s" new-base-name (file-name-extension file)))
+        (unless (equal file-name new-name)
+          (message "%s -> %s" file new-name)
+          (ignore-error 'file-already-exists (rename-file file new-name))
           )
-        ))
+        )
+      )
     ))
 
 (defun belf-move-invalid-file-names (dir new-dir)
@@ -204,6 +179,14 @@ foo bar & quux, baf"
         (rename-file file-name new-name)
         ))))
 
+(defun belf-dired-do-epub-rename ()
+  (interactive)
+  (seq-do
+   (lambda (file)
+     (when (equal (upcase (file-name-extension file)) "EPUB")
+       (belf-epub-rename file (file-name-directory file))))
+   (dired-get-marked-files)))
+
 (defun belf-epub-rename-at-point ()
   (interactive)
   (let ((file-name (tabulated-list-get-id)))
@@ -245,15 +228,6 @@ foo bar & quux, baf"
       (json-read)))
   )
 
-(defun belf-epub-content-file-name (file-name)
-  (with-temp-buffer
-    (if (eq 0 (call-process "unzip" nil t nil
-                            "-p" file-name "META-INF/container.xml"))
-        (let ((dom (libxml-parse-xml-region (point-min) (point-max))))
-          (dom-attr (dom-by-tag (dom-by-tag (dom-by-tag dom 'container) 'rootfiles) 'rootfile) 'full-path))
-      (message "Failed to extract container.xml: %s" (buffer-string))
-      nil)))
-
 (defun belf-epub-cover-file-name (file-name content-file-name)
   (with-temp-buffer
     (call-process "unzip" nil t nil "-p" file-name content-file-name)
diff --git a/emacs/.emacs.d/lisp/my/my-epub.el b/emacs/.emacs.d/lisp/my/my-epub.el
new file mode 100644
index 0000000..4a3dfca
--- /dev/null
+++ b/emacs/.emacs.d/lisp/my/my-epub.el
@@ -0,0 +1,75 @@
+;;; my-epub.el -- epub utils -*- lexical-binding: t -*-
+
+;; Copyright (C) 2025  Free Software Foundation, Inc.
+
+;; Author: Yuchen Pei <id@ypei.org>
+;; Package-Requires: ((emacs "30.1"))
+
+;; 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:
+
+;; epub utils.
+
+;;; Code:
+
+
+(defun my-epub-content-file-name (file-name)
+  (with-temp-buffer
+    (if (eq 0 (call-process "unzip" nil t nil
+                            "-p" file-name "META-INF/container.xml"))
+        (let ((dom (libxml-parse-xml-region (point-min) (point-max))))
+          (dom-attr
+           (dom-by-tag
+            (dom-by-tag (dom-by-tag dom 'container) 'rootfiles)
+            'rootfile)
+           'full-path))
+      (message "Failed to extract container.xml: %s" (buffer-string))
+      nil)))
+
+(defun my-epub-metadata (file-name)
+  "Get metadata of an epub file."
+  (when-let ((content-file-name (my-epub-content-file-name file-name)))
+    (with-temp-buffer
+      (call-process "unzip" nil t nil "-p" file-name content-file-name)
+      (let* ((dom (libxml-parse-xml-region (point-min) (point-max)))
+             (metadata (dom-by-tag dom 'metadata))
+             (title (dom-text (dom-by-tag metadata 'title)))
+             (authors (dom-texts (dom-by-tag metadata 'creator) ", "))
+             (identifier
+              (replace-regexp-in-string
+               "[^0-9,]" ""
+               (dom-texts
+                (seq-filter
+                 (lambda (node)
+                   (or (equal "ISBN" (dom-attr node 'scheme))
+                       (string-match-p "^[0-9]+$" (dom-text node))))
+                 (dom-by-tag metadata 'identifier))
+                ",")))
+             (date (replace-regexp-in-string
+                    "[^0-9]" ""
+                    (dom-text (dom-by-tag metadata 'date))))
+             (year (substring date 0 (min 4 (length date)))))
+        `((title . ,title)
+          (authors . ,authors)
+          (year . ,year)
+          (identifier . ,identifier))
+        ;; (pp metadata)
+        ))
+    ))
+
+(provide 'my-epub)
+;;; my-epub.el ends here