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Check if Chat Room Exists
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Lightbarrier 2014-07-29, 19:54 #1
Member since Jul 2014 · 52 posts
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Subject: Check if Chat Room Exists
Hi again Alex,

I realize that the following code below joins a chat room, and if it doesn't exist creates it however, I was wondering if there was a way to check if the room already exists, that way you'll know if your joining a room, or creating one. I apologize if there's a solution to this which I haven't come across. Thanks!

  1. TheMucManager.EnterRoom(roomJid, usersNickName);
This post was edited on 2014-07-29, 20:06 by Alex.
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Alex 2014-07-29, 20:09 #2
Member since Feb 2003 · 4449 posts · Location: Germany
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This is how MUC is designed in XMPP. If the room does not exist it gets created automatically.

You can you ServiceDiscoveryDisco and send a discover items request to your MUC server (DiscoManager.DiscoverItems). This will return all existing rooms.

Alex
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Lightbarrier 2014-07-29, 22:40 #3
Member since Jul 2014 · 52 posts
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Subject: Example of Syntax
Could you give me a example of what your thinking?

Currently I've found something like below, where you pass in the group chat Jid, and try to get the status of wither it exists from the discomanager however, I'm not sure if this is what you had in mind as I'm just checking the status of one(even though that's what I wanted), I'm also slightly suspicious if this is even doing what I think it's doing.

Thanks!

  1.  public async void CheckIfGroupExists()
  2. {
  3.        DiscoManager manage = new DiscoManager(xmppConection);
  4.        var list = await manage.DiscoverItemsAsync(groupChatJid);
  5.  
  6.        if(list.Type == IqType.error)
  7.        {
  8.             // Doesn't exist
  9.        }
  10.        else
  11.        {
  12.            // Does exist
  13.        }
  14. }
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Alex 2014-07-30, 00:20 #4
Member since Feb 2003 · 4449 posts · Location: Germany
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Yes this will work, and can be a good idea when there are lots of rooms available on the server. Less traffic than retrieving the complete list of available rooms.

The other way is to pass the Jid of the muc server component and get back the complete list of available rooms. An example for that is here in this thread:
http://forum.ag-software.net/thread/1346-retrieve-rooms

Alex
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Lightbarrier 2014-08-06, 19:38 #5
Member since Jul 2014 · 52 posts
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Subject: Thanks
Thanks works well.
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