Would be great to add this possibility, as said by deltafire cool functions could be added. rmodifier is different in a way it does not allow to come back to the original message.

eg. curious filter nick.
/filter add ignore nick\t s/.*//

toggle long lines (here more than 50 char)
/filter add longline * s/(.{50}).*/\1/

filter badwords
/filter add badword badword s/badword/☠☠☠/

undeline words
/filter add keyword keyword s/keyword/[color/bold/underline]keyword/

As discussed in the channel, it would be great also to add command triggers (maybe an other command than filter)

eg. spam detection
/filter add spamfilter spam @print XYbuffer "spam detected"

Then maybe rmodifier could be improved. Please open another task for that if you want something new in rmodifier, I'll close this one.

Darn, I miss a preview or edit option on Savannah..

Deltafire: If I look at your example, shouldn't it be possible to achieve that by nullifying expressions? I mean, basically you are looking at nullifying:

-- xxx.xxxx.net (xxx.xxxx.net): *** Notice --

and:

!bopm@xxx.xxxx.net{xxx.xxxx.net} added temporary 60 min. K-Line for [

and finally:

] [Temporary K-line 60 min. - You're listed on an IP blacklist. Please visit http://www.xxxxx.net/rbl.php for more information. (ip=61.160.83.138&network=XxxxNet (2011/1/23 18.11)]

Granted, that could perhaps be achieved in a nicer way.

I've experimented a bit with /rmodifier, it almost does what I want but not quite.  It appears to allow matched expressions to be nullified, censored or left as is; it does not allow the the format or content to be altered.

The situation is I get sent lengthy messages from the server, for example:

17:11 EN -- xxx.xxxx.net (xxx.xxxx.net): * Notice --            BOPM!bopm@xxx.xxxx.net{xxx.xxxx.net} added temporary 60 min. K-Line for [*@61.160.83.138] [Temporary K-line 60 min. - You're listed on an IP blacklist.  Please visit www.xxxxx.net/rbl.php for more information. (ip=61.160.83.138&network=XxxxNet (2011/1/23 18.11)]

There is much redundant information here, what I'd like to actually see is:

17:11 EN BOPM *@61.160.83.138

Or similar.  Obviously I could write a script to do this (which is what I had in irssi), but the /filter and /rmodifier commands are almost there.

Let me know what you think, if this is beyond the scope of /rmodifier then just close this task and I'll write a script for it instead :)

It would be very useful if instead of just dropping matched items, /filter could perform a reg-ex substitution on them instead.  I'd like to use this to filter lengthy server messages into something more space efficient, but I'd imagine this would have plenty of other uses too.