I am developing an iOS application with chat features. I am using XMPP for that application. In XMPP Multi user chat, whether any feature is available to set avatar image or group image for the conference room like the one we do in whatsapp?
I have checked XEP-0045 extension but it wasn't helpful,
So I checked with Psi by creating conference rooms, I came to understand that the user has vcard
so he can store his avatar image but the XMPP doesn't provide any vcards
for the groups we create. Now I possibly understand why its not available.
Yet I can't convince how whatsapp is able to achieve. I have also thought an alternative using pub/sub to send the group image by url. But I'm searching whether any default options provided by XMPP that invisibles to my eyes.
Please conform me whether the feature is available or not in XMPP? OR suggest any different answers you have?
The better solution would be to host an image in some other server , do the upload and get the public path for that image and share as a custom stanza for the group image.
Example
<message [email protected] to [email protected] type=groupchat id=groupimage-XXXX> <body>groupimage</body> <metadata> <type>groupimage> <filesize>..bytes</filesize> <imageurl>https://...someurl.../groupimage_timestamp.jpg</imageurl> </metadata> </message>
This is how to my understanding the whatsapp guys also doing.
As of 2018, use MUC vCards: set the PHOTO
-bearing vCard directly on the chatroom MUC.
https://docs.ejabberd.im/tutorials/muc-vcard/
Refer to XEP-0054 and XEP-0153.
<iq id='set1' type='set' to='[email protected]'> <vCard xmlns='vcard-temp'>
<PHOTO>
<TYPE>image/png</TYPE>
<BINVAL> 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</PHOTO>
</vCard> </iq>
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