Re: nnir, gnus-goto-article and such

[Ted Zlatanov <tzz@lifelogs.com>]

On Tue, 27 Sep 2011 11:35:42 -0400 Dave Abrahams <dave@boostpro.com> wrote: 

DA> on Mon Sep 26 2011, Ted Zlatanov <tzz-AT-lifelogs.com> wrote:

>> The registry is a place where we record interesting things (group,
>> subject, sender, recipients, registry marks) about articles, keyed by
>> the message ID.  But it's also a general key-val store with some
>> indexing.  For Lars' point, the registry is an opportunistic cache that
>> remember where you've seen a message-ID (server name and group name) and
>> where it's been split before.

DA> Yes, I understand all that... I know what it is as a library component.
DA> What I don't see is how *at the user level* it can easily and usefully
DA> be exploited.

Er, you can split to the reference parent, or by subject, or by sender?
It lets the user keep registry marks?  Are those not exploitative enough?

>> Simply call it like this (for message-ID "34"):
>> 
>> (gnus-registry-get-id-key "34" 'group)
>> (gnus-registry-get-id-key "34" 'subject)

DA> "34" sounds like a message number, not a Message-ID (like what's found
DA> in mail headers).  How is gnus-registry going to know which group's
DA> number 34 I'm referencing?

No, I said message-ID was 34 so I didn't have to type
"<m2wrcu0zht.fsf@pluto.luannocracy.com>".  Sorry for the confusion.

DA> So here's an example where I tried it out.  

DA> (defun gnus-goto-article (message-id)
DA>   (with-temp-buffer
DA>     (erase-buffer)
DA>     ;; Insert dummy article
DA>     (insert (format "From nobody Tue Sep 13 22:05:34 2011\n\n"))
DA>     (gnus-group-read-ephemeral-group message-id
DA>      `(nndoc ,message-id
DA>              (nndoc-address ,(current-buffer))
DA>              (nndoc-article-type mbox))
DA>      'activate
DA>      (not    'quit-config)
DA>      (not    'request-only)
DA>      '(-1) ; 'select-articles
DA>      (not    'parameters)
DA>      0     ; ' number
DA>      )
DA>     (gnus-summary-refer-article message-id)
DA>     (message "group from registry: %s" (gnus-registry-get-id-key message-id 'group))
DA>     ))

DA> I queried the registry at the point where I'd like to know the group of
DA> that article.  Unfortunately, I get back nil.  And if I wanted to
DA> conjure up an article number, well, it's -1, so that's not going to be
DA> much help, is it?

The registry notices articles when you visit a group or when articles
are split.  To feed it artificial data, use:

(defun gnus-registry-handle-action (id from to subject sender
                                       &optional recipients)

I hope that helps...

Ted