Plugin to update my sieve filter

[bilogic]

I'm very new to snappymail, but quite amazed with it so far.

1. Is possible to write a plugin to add a button next to the sender address when viewing emails?
2. I like to classify senders as Ads/News and Block
3. This then adds that address into a sieve filter which files their messages into the respective folders

[the-djmaze]

Not at the moment.
However, there's a search filters extension (written by a user) that could do some things for you.
It's not fully the same, but it might help you for now.

[bilogic]

Hmm ok, I have a set of ideas which I feel gives a foundation layer to what I think is a new way to deal with emails.
I'm asking because snappymail is in PHP and seems to have sufficient features to start from (instead of scratch)

Should I present them as a whole or list them 1 by 1 separately?

[the-djmaze]

Currently it is not possible to create extensions that integrate with Sieve.
This is mostly due to the complexity of Sieve.

People ask things, but Sieve has a major issue: only 1 script can be active.
Yet, it is possible to let the active script include other scripts.

However, each application prefers their own script (and disables the others).
Thunderbird, roundcube, etc always say "please activate my script".

SnappyMail doesn't care which script is active. You can edit all of them.

But when you want to automate things:

1. Which script(s) is/are active?
2. Can it be modified without other app (which owns the script) is crashing?
3. What if the rule is deleted by other application?

Yes it's terrible...

[bilogic]

Do you mean I can only edit the active script? Well, I would just edit a script identified by its name, it will be up to the user (me) to ensure I don't pick another script. What I meant is additional UI on snappy that leads to the modification happening.

[the-djmaze]

Say you also use Thunderbird (it's fictional, could be any other email app).
In Thunderbird you've added Sieve rules (in a Thunderbird script).
Now through SnappyMail you want to add a Sieve rule if sender address then classify as Ads/News and Block
SnappyMail finds 5 Sieve scripts:

1. USER
2. rainloop,user
3. rainloop,user.raw
4. thunderbird (active)
5. kmail

SnappyMail could add the rule to 4, but then Thunderbird might crash when it has no clue how to parse it (while it works on the Sieve server).
Instead, SnappyMail could add the rule to a new script 6 and modify 4 to include 6. If Thunderbird doesn't crash you can edit script 4 in Thunderbird, but will it save the include?
We potentially still have an issue!
Now SnappyMail add the rule to a new script 6 and include 4 and activates script 6. This is safe because Thunderbird script is untouched.

Now Sieve scripts:

1. USER
2. rainloop,user
3. rainloop,user.raw
4. thunderbird
5. kmail
6. snappy (active)

Now you open Thunderbird. Thunderbird sees that script 6 is active and not 4.
Thunderbird asks you to activate script 4 else the changes you make are not active (according to Thunderbird).
You say "yes" and now script 4 is active.
But... the rules you just added to 6 are now inactive!

If every Sieve editor in apps just supports everything, then there is no issue.

A good example of the mess is the SnappyMail Filter editor as well.
The "Simple" script is actually the old "rainloop.user" script as a simple GUI that RainLoop created.
At the bottom it has a button

to show you the real script source.
You see the mess that RainLoop requires?

So editing this script with a different email app will break it as well.
Also read #80

It would be best if every email app uses the Kolab USER script:

# USER Management Script
#
# This script includes the various active sieve scripts
# it is AUTOMATICALLY GENERATED. DO NOT EDIT MANUALLY!
# 
# For more information, see http://wiki.kolab.org/KEP:14#USER
#

require ["include"];

include :personal "rainloop.user.raw";
include :personal "kmail";

But how is it automatically generated?
Can it be updated outside kolab?
If so, any :personal script can be (de)activated