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mod_minimix: Experiment in account-based MUC joins
author Kim Alvefur <zash@zash.se>
date Thu, 22 Mar 2018 14:33:46 +0100
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children 024075effb74
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1 Account based MUC joining
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2 =========================
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3
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4 Normally when joing a MUC groupchat, it is each individual client that
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5 joins. This means their presence in the group is tied to the session,
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6 which can be short-lived or unstable, especially in the case of mobile
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7 clients.
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8
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9 This has a few problems. For one, for every message to the groupchat, a
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10 copy is sent to each joined client. This means that at the account
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11 level, each message would pass by once for each client that is joined,
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12 making it difficult to archive these messages in the users personal
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13 archive.
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14
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15 A potentially better approach would be that the user account itself is
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16 the entity that joins the groupchat. Since the account is an entity that
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17 lives in the server itself, and the server tends to be online on a good
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18 connection most of the time, this may improve the experience and
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19 simplify some problems.
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20
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21 This is one of the essential changes in the MIX architecture, which is
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22 being designed to replace MUC.
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23
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24 `mod_minimix` is an experiment meant to determine if things can be
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25 improved without replacing the entire MUC standard. It works by
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26 pretending to each client that nothing is different and that they are
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27 joining MUCs directly, but behind the scenes, it arranges it such that
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28 only the account itself joins each groupchat. Which sessions have joined
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29 which groups are kept track of. Groupchat messages are then forked to
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30 those sessions, similar to how normal chat messages work.
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31
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32 ## Known issues
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33
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34 - You can never leave.
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35 - You will never see anyone leave.
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36
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37 ## Unknown issues
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38
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39 - Probably many.
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40
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41 # Compatibility
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42
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43 Briefly tested with Prosody trunk (as of this writing).