Hi Richard
What exactly are these "rules" that you speak of?
These rules are a set of requirements that IETF Greopriv WG recommends for manage privacy and security concerns about presence and location information of users. These rules are basically a XML document. This document include instructions for detremining whom is available to receive the presence and location information, when and where this information is disclose to others users.
There is no reason you cannot build this on pubsub (presence is just another kind of pubsub afterall), depending on what you want to change in the presence handling code you may end up making your server non IETF RFC compliant making your hacked implementation incompatible with the rest of the XMPP world, which is IMO a very bad thing.
I am agree with you and Peter about XMPP compliant, and i have interest in no affect the core of jabber. In fact, i am looking a way for do this without affect the jabber server. Let me explain better my problem.
With presence protocol basically we can know whom is online and if this person is available (busy, away, etc), of course, for see the presence status of other users we have to have authorization of the users.
Using jep-0060 we can publish user geolocation (jep-0080) to others users, every susbscriber subscribe a topic, and each time that publisher put information in the topic and event is delivery to each subscribe.
Now suppose this scenario, i am in my building's company and my geolocation information is changing frecuently, i use a PDA and my jabber client know where i am and publish this information to my co-workers, all my co-workers have authorization to see my geolocation information. However i want that some co-workers know only if i am in the building or not, because is all information they need. When i am in the cafeteria or the bathroom i don't like to disclose this information to anyone, my geolocation is only available to some co-workers from monday to friday from 9:00 am to 1:00 pm and finally i want that some co-workers can susbcribe to my geolocation information for 24 hrs only after that they don't receive more that information.
This issues are adressed by IETF Geopriv workgroup, and they create a set of rules in xml format and they published it in a draft that manage above requirements. This rules determine how the geolocation information reach to each subscriber.
My question is, there is a way that i can do this or somenthing similar without affect the code jabber server?. There is a way for publishing information, process it with some entity and after that disclose it?
I really will appreciate any suggestion.
Thanks. Leonardo.
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