[Telepathy] GSoC Idea: XEP-0030 in GTG: Collaborative Getting Things GNOME

[Izidor Matušov]

Hallo,

my name is Izidor and I am wannabe GSoC student for Getting Things 
GNOME! - a ToDO list app for GNOME. I would like to add to GTG sharing 
of tasks between users over XMPP. I don't want to create my own protocol 
because:

   * I was enchanted on this year FOSDEM by XMPP folks and BuddyCloud 
social network powered by XEP-0030 PubSub
   * Many people has already XMPP. You don't need to add all your 
colleagues to GTG. They would be there thanks to your rooster.
   * I don't like reinventing the wheel and would rather concentrate on 
higher levels - UI, polishing user experience.

I skimmed XEP-0030 standard as guys from BuddyCloud have done and it 
should satisfy most of my needs. The rest could be solved on server side 
by business logic.

I am kind of new in Telepathy and so far was able to get list of my 
online contacts over DBus after couple hours. :-) I would like to ask 
about the current state of Telepathy Gabble: Could it solve my needs? 
What parts would I need to patch to have required features?

[GTG required features follow]

*Get the list of enabled XMPP accounts*
to choose for user which ones she wants to use

*Make those accounts go online although empathy is not running*
GTG should depend on Empathy if it is running or not

*Create a new PubSub node given the server and XMPP account*

*Subscribe to a PubSub node on given server and given XMPP account*
I assume this would create a new DBus path for that combination of node, 
server, XMPP account.

*To have a signal for publish notification in DBus for given PubSub node*
With or without payload based on server

*Be able to retrieve item payload if notification is without payload"

*Be able to create a new item, update item or delete item given the node*

*Be able to receive all items given the node*
This is for startup of the client. It would be performance improvement 
if it would be possible through XEP-0312: PubSub Since

*Be able to manage affilations of given PubSub node*:
So far we don't want to have big permission models. Users could add 
other users as Owners (to add friends of their friends) or as outcaster 
(you don't belong to our project anymore).
I would like to use 'whitelist access mode' on the server to manage 
permissions to read tasks.

Is that possible to do with Telepathy Gabble? How would you solve this?

Thanks for your time,

Izidor