Add support for XEP-0045 7.10 "Registering with a room"

[mdosch]

I'd appreciate if profanity could register my nickname in a MUC to prevent others to occupy my nick while I am offline. This is defined in XEP-0045 7.10.

I have successfully registered a nick at MUCs where I have "member" state hosted prosody 0.11.x servers. I didn't manage to do so with MUCs on ejabberd yet, but maybe @weiss could clarify if these procedure should also work for ejabberd.

This is an example for my successful request in one MUC:

<iq type="get" to="kuketzblog@rooms.dismail.de" id="register0815-1"> <query xmlns="http://jabber.org/protocol/disco#info"/></iq>

21/10/2019 19:45:53: xmpp: DBG: RECV: <iq id="register0815-1" to="REDACTED/KI29sWXY" lang="en" type="result" from="kuketzblog@rooms.dismail.de"><query xmlns="http://jabber.org/protocol/disco#info" node=""><feature var="muc_open"/><feature var="muc_unsecured"/><feature var="http://jabber.org/protocol/muc"/><feature var="http://jabber.org/protocol/muc#stable_id"/><feature var="http://jabber.org/protocol/muc#self-ping-optimization"/><feature var="muc_public"/><feature var="muc_persistent"/><feature var="http://jabber.org/protocol/muc#request"/><feature var="vcard-temp"/><feature var="muc_moderated"/><identity type="text" category="conference" name="Kuketz-Blog"/><feature var="urn:xmpp:mam:2"/><feature var="jabber:iq:register"/><feature var="muc_semianonymous"/><x xmlns="jabber:x:data" type="result"><field type="hidden" var="FORM_TYPE"><value>http://jabber.org/protocol/muc#roominfo</value></field><field label="Allow members to invite new members" type="boolean" var="{http://prosody.im/protocol/muc}roomconfig_allowmemberinvites"><value>0</value></field><field type="boolean" var="muc#roominfo_changesubject"/><field label="Number of occupants" type="text-single" var="muc#roominfo_occupants"><value>396</value></field><field type="text-single" var="{http://modules.prosody.im/mod_vcard_muc}avatar#sha1"><value>f9db3899f4532402b70c22aa9c7a343f38a41728</value></field><field label="Title" type="text-single" var="muc#roomconfig_roomname"><value>Kuketz-Blog</value></field><field type="text-single" var="muc#roominfo_lang"><value>de</value></field><field label="Description" type="text-single" var="muc#roominfo_description"><value>IT-Sicherheit | Datenschutz | Hacking -  Weitere Infos: https://www.kuketz-blog.de/chat/</value></field></x></query></iq>

<iq type="get" to="kuketzblog@rooms.dismail.de" id="register0815-2"> <query xmlns="jabber:iq:register"/></iq>

21/10/2019 19:46:17: xmpp: DBG: RECV: <iq id="register0815-2" to="REDACTED/KI29sWXY" lang="en" type="result" from="kuketzblog@rooms.dismail.de"><query xmlns="jabber:iq:register"><registered/><username>Martin</username></query></iq>

<iq type="set" to="kuketzblog@rooms.dismail.de" id="register0815-3"> <query xmlns="jabber:iq:register">  <x xmlns="jabber:x:data" type="submit">   <field type="text-single" var="muc#register_roomnick">    <value>Martin</value>   </field>  </x> </query></iq>

21/10/2019 19:46:38: xmpp: DBG: RECV: <iq id="register0815-3" to="REDACTED/KI29sWXY" lang="en" type="result" from="kuketzblog@rooms.dismail.de"/>

[jubalh]

Thanks for the request. Makes sense to have this.
I'll close this until we are down to 50 ;)
Feel free to reopen then.

[weiss]

if these procedure should also work for ejabberd.

It won't; ejabberd allows for registering a nickname with the entire MUC service (conference.example.com), but not per-room (room@conference.example.com). However, the procedure you outlined above is the one documented in XEP-0045, so I guess it would be better to implement that in ejabberd than to add support for ejabberd's old mechanism to new clients.

[licaon-kter]

@weiss this wasn't yet pursued, right?

[mdosch]

@licaon-kter See the referenced ejabberd issue