GNU bug report logs - #64023
29.0.91; gnus-icalendar does not update timestamp when description is empty

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Reindert-Jan Ekker <info <at> codesensei.nl>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.91; gnus-icalendar does not update timestamp when description
 is empty
Date: Mon, 12 Jun 2023 17:48:27 +0200

I use mu4e for my email and org-mode for managing my calendar.

When I accept a calendar invitation that has *no description* using
gnus-icalendar, and later I receive an update for that invitation, the
code that updates the corresponding org element will remove the
timestamp completely.

This is quite common for invitations from e.g. thunderbird, that have
only a summary but where the description field has been left empty.

To show this in action we would need a complete mu4e and gnus-icalendar
setup, but we can recreate the effect as follows:

we have an org file in "~/test.org" containing an event exported from an
icalendar invitation:

----- contents of test.org -----
* Test
:PROPERTIES:
:ICAL_EVENT: t
:ID:       xxx-11-yyy
:ORGANIZER: Me
:LOCATION:
:PARTICIPATION_TYPE: non-participant
:REQ_PARTICIPANTS:
:OPT_PARTICIPANTS:
:RRULE:
:REPLY:    Not replied yet
:END:

  <2023-08-01 01:00-01:00>
----- end of test.org -----

We can now call the function to update this event to a new date as
follows (this works with emacs -Q):


(require 'gnus-icalendar)
(let ((ev (gnus-icalendar-event :organizer "Me" :summary "Test"
                                :start-time (encode-time '(0 0 0 1 9 2023 nil nil nil))
                                :end-time (encode-time '(0 0 0 1 9 2023 nil nil nil))
                                :uid "xxx-11-yyy"
                                :recur nil
                                :description nil)))
  (gnus-icalendar--update-org-event ev nil (list (expand-file-name "~/test.org"))))

This results in the following:

----- new contents of test.org -----
* [#C] Test ()
:PROPERTIES:
:ICAL_EVENT: t
:ID:       xxx-11-yyy
:ORGANIZER: Me
:PARTICIPATION_TYPE: non-participant
:REPLY:    Not replied yet
:END:
----- end of test.org -----

Note how the timestamp has not been updated but completely erased.

This is because in gnus-icalendar--update-org-event, the code for
updating the timestamp is inside "(when description ...)", causing it to
only be run when the description is not empty.

-----

In GNU Emacs 29.0.91 (build 1, aarch64-apple-darwin21.6.0, NS
 appkit-2113.60 Version 12.6.5 (Build 21G531)) of 2023-05-31 built on
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-- 
Reindert-Jan Ekker
Code Sensei

Message #8 received at 64023 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Reindert-Jan Ekker <info <at> codesensei.nl>
Cc: 64023 <at> debbugs.gnu.org
Subject: Re: bug#64023: 29.0.91; gnus-icalendar does not update timestamp
 when description is empty
Date: Mon, 12 Jun 2023 18:21:46 +0200

>>>>> On Mon, 12 Jun 2023 17:48:27 +0200, Reindert-Jan Ekker <info <at> codesensei.nl> said:


    Reindert-Jan> This is because in gnus-icalendar--update-org-event, the code for
    Reindert-Jan> updating the timestamp is inside "(when description ...)", causing it to
    Reindert-Jan> only be run when the description is not empty.

I was sure Iʼd fixed this already, but that was in `gnus-icalendar-event->org-entry', not
`gnus-icalendar--update-org-event'

How does this work for you:

diff --git a/lisp/gnus/gnus-icalendar.el b/lisp/gnus/gnus-icalendar.el
index 0d776cd1bca..542e2a621a0 100644
--- a/lisp/gnus/gnus-icalendar.el
+++ b/lisp/gnus/gnus-icalendar.el
@@ -642,16 +642,16 @@ gnus-icalendar--update-org-event
                   (delete-region (point) entry-end))
 
                 ;; put new event description in the entry body
-                (when description
-                  (save-restriction
-                    (narrow-to-region (point) (point))
-                    (insert "\n"
-                            (gnus-icalendar-event:org-timestamp event)
-                            "\n\n"
-                            (replace-regexp-in-string "[\n]+$" "\n" description)
-                            "\n")
-                    (indent-region (point-min) (point-max) (1+ entry-outline-level))
-                    (fill-region (point-min) (point-max))))
+                (save-restriction
+                  (narrow-to-region (point) (point))
+                  (insert "\n"
+                          (gnus-icalendar-event:org-timestamp event)
+                          "\n\n"
+                          (replace-regexp-in-string "[\n]+$" "\n"
+                                                    (or description "No description"))
+                          "\n")
+                  (indent-region (point-min) (point-max) (1+ entry-outline-level))
+                  (fill-region (point-min) (point-max)))
 
                 ;; update entry properties
                 (cl-labels

Robert
-- 

Message #11 received at 64023 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Reindert-Jan Ekker <info <at> codesensei.nl>
Cc: 64023 <at> debbugs.gnu.org
Subject: Re: bug#64023: 29.0.91; gnus-icalendar does not update timestamp
 when description is empty
Date: Tue, 13 Jun 2023 12:48:20 +0200

(please keep the bug address in CC)

>>>>> On Mon, 12 Jun 2023 20:16:30 +0200, Reindert-Jan Ekker <info <at> codesensei.nl> said:

    Reindert-Jan> Yes, that works!

OK. Eli, emacs-29 or master? Itʼs a pretty small change, but itʼs not
a regression as such.

    Reindert-Jan> By the way, what is the intended behaviour of
    Reindert-Jan> gnus-icalendar--cancel-org-event? It seems to search for a property "DT"
    Reindert-Jan> that does not exist (at least in my files), so it does not change the
    Reindert-Jan> event. Is this a bug or am I missing some configuration somewhere?

It looks like a bug. I canʼt find any code creating such a property,
the current code inserts the timestamp in the body of the org entry.

Robert
-- 

Message #14 received at 64023 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Robert Pluim <rpluim <at> gmail.com>
Cc: 64023 <at> debbugs.gnu.org, info <at> codesensei.nl
Subject: Re: bug#64023: 29.0.91;
 gnus-icalendar does not update timestamp when description is empty
Date: Tue, 13 Jun 2023 14:24:01 +0300

> Cc: 64023 <at> debbugs.gnu.org
> From: Robert Pluim <rpluim <at> gmail.com>
> Date: Tue, 13 Jun 2023 12:48:20 +0200
> 
> >>>>> On Mon, 12 Jun 2023 20:16:30 +0200, Reindert-Jan Ekker <info <at> codesensei.nl> said:
> 
>     Reindert-Jan> Yes, that works!
> 
> OK. Eli, emacs-29 or master? Itʼs a pretty small change, but itʼs not
> a regression as such.

Master, please.

Message #17 received at 64023 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 64023 <at> debbugs.gnu.org, info <at> codesensei.nl
Subject: Re: bug#64023: 29.0.91; gnus-icalendar does not update timestamp
 when description is empty
Date: Tue, 13 Jun 2023 14:45:25 +0200

tags 64023 fixed
close 64023 30.1
quit

>>>>> On Tue, 13 Jun 2023 14:24:01 +0300, Eli Zaretskii <eliz <at> gnu.org> said:

    >> Cc: 64023 <at> debbugs.gnu.org
    >> From: Robert Pluim <rpluim <at> gmail.com>
    >> Date: Tue, 13 Jun 2023 12:48:20 +0200
    >> 
    >> >>>>> On Mon, 12 Jun 2023 20:16:30 +0200, Reindert-Jan Ekker <info <at> codesensei.nl> said:
    >> 
    Reindert-Jan> Yes, that works!
    >> 
    >> OK. Eli, emacs-29 or master? Itʼs a pretty small change, but itʼs not
    >> a regression as such.

    Eli> Master, please.

Closing.
Committed as daf7902ed9d

Robert
-- 

Message #24 received at 64023 <at> debbugs.gnu.org (full text, mbox):

From: Reindert-Jan Ekker <info <at> codesensei.nl>
To: Robert Pluim <rpluim <at> gmail.com>
Cc: 64023 <at> debbugs.gnu.org
Subject: Re: bug#64023: 29.0.91; gnus-icalendar does not update timestamp
 when description is empty
Date: Fri, 16 Jun 2023 20:45:48 +0200

[Message part 1 (text/plain, inline)]

As a little exercise I've been writing some unit tests for the bug you
fixed regarding updates to events with empty description. Patch is
attached. Looking forward to any feedback.

[0001-test-lisp-gnus-gnus-icalendar-tests.el-Add-tests-for.patch (text/x-patch, attachment)]

[Message part 3 (text/plain, inline)]

Robert Pluim <rpluim <at> gmail.com> writes:

> (please keep the bug address in CC)
>
>>>>>> On Mon, 12 Jun 2023 20:16:30 +0200, Reindert-Jan Ekker <info <at> codesensei.nl> said:
>
>     Reindert-Jan> Yes, that works!
>
> OK. Eli, emacs-29 or master? Itʼs a pretty small change, but itʼs not
> a regression as such.
>
>     Reindert-Jan> By the way, what is the intended behaviour of
>     Reindert-Jan> gnus-icalendar--cancel-org-event? It seems to search for a property "DT"
>     Reindert-Jan> that does not exist (at least in my files), so it does not change the
>     Reindert-Jan> event. Is this a bug or am I missing some configuration somewhere?
>
> It looks like a bug. I canʼt find any code creating such a property,
> the current code inserts the timestamp in the body of the org entry.
>
> Robert


-- 
Reindert-Jan Ekker
Code Sensei

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