From fcf78b5a5447ae81479e7839df001da659ede5e3 Mon Sep 17 00:00:00 2001
From: stardiviner <numbchild@gmail.com>
Date: Wed, 27 May 2020 17:42:24 +0800
Subject: [PATCH] * org-attach.el: add a new command to offline save web page

* lisp/org-attach.el (org-attach-url-offline): A new org-attach
dispatcher command to offline save web page to a single file.

* lisp/org-agenda.el (org-attach-url-offline-command): A customize
option to specify external command for offline save web page.

* lisp/org-attach.el (org-attach-offline-url-with-monolith): A command
invoke external command "monolith" to offline save web page.
---
 lisp/org-attach.el | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/lisp/org-attach.el b/lisp/org-attach.el
index 57d1360fc..0d13e0da1 100644
--- a/lisp/org-attach.el
+++ b/lisp/org-attach.el
@@ -204,6 +204,8 @@ (defcustom org-attach-commands
      "Attach a file using symbolic-link method.")
     ((?u ?\C-u) org-attach-url
      "Attach a file from URL (downloading it).")
+    ((?U) org-attach-url-offline
+     "Attach an offline version of web page URL (use monolith).")
     ((?b) org-attach-buffer
      "Select a buffer and attach its contents to the task.")
     ((?n ?\C-n) org-attach-new
@@ -467,6 +469,27 @@ (defun org-attach-url (url)
   (let ((org-attach-method 'url))
     (org-attach-attach url)))
 
+(defun org-attach-url-offline (url)
+  (interactive "MURL of the web page be offline to attach: \n")
+  (let ((org-attach-method 'offline))
+    (org-attach-attach url)))
+
+(defcustom org-attach-url-offline-command (executable-find "monolith")
+  "The command used to offline save web page."
+  :type 'string
+  :safe #'stringp
+  :group 'org-attach)
+
+(defun org-attach-offline-url-with-monolith (url target-file)
+  "Save an offline archive of web page with monolith."
+  (if org-attach-url-offline-command
+      (make-process
+       :name "org-attach-offline"
+       :command (list org-attach-url-offline-command url "-o" target-file)
+       :sentinel (lambda (proc event) (message "org-attach-offline finished!"))
+       :buffer "*org-attach-offline*")
+    (warn "You must have a command availble for offline save web page!\n Set variable `org-attach-url-offline-command'.")))
+
 (defun org-attach-buffer (buffer-name)
   "Attach BUFFER-NAME's contents to current outline node.
 BUFFER-NAME is a string.  Signals a `file-already-exists' error
@@ -504,7 +527,8 @@ (defun org-attach-attach (file &optional visit-dir method)
        ((eq method 'cp) (copy-file file attach-file))
        ((eq method 'ln) (add-name-to-file file attach-file))
        ((eq method 'lns) (make-symbolic-link file attach-file))
-       ((eq method 'url) (url-copy-file file attach-file)))
+       ((eq method 'url) (url-copy-file file attach-file))
+       ((eq method 'offline) (org-attach-offline-url-with-monolith file attach-file)))
       (run-hook-with-args 'org-attach-after-change-hook attach-dir)
       (org-attach-tag)
       (cond ((eq org-attach-store-link-p 'attached)
-- 
2.26.2