prosody
e9d62fff82a8
plugins/muc/occupant.lib.lua

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plugins/muc/occupant.lib.lua @ 6210:e9d62fff82a8

plugins/muc/occupant.lib: Don't allow an unavailable session to be the primary jid
author daurnimator <quae@daurnimator.com>
date Wed, 02 Apr 2014 18:37:52 -0400
parent 6179:e488a90195bc
child 6251:41a5e5205fd9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6179
e488a90195bc plugins/muc: Massive refactor
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1 local next = next;
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2 local pairs = pairs;
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3 local setmetatable = setmetatable;
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4 local st = require "util.stanza";
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5
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6 local get_filtered_presence do
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7 local presence_filters = {
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8 ["http://jabber.org/protocol/muc"] = true;
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9 ["http://jabber.org/protocol/muc#user"] = true;
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10 }
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11 local function presence_filter(tag)
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12 if presence_filters[tag.attr.xmlns] then
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13 return nil;
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14 end
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15 return tag;
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16 end
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17 function get_filtered_presence(stanza)
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18 return st.clone(stanza):maptags(presence_filter);
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19 end
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20 end
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21
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22 local occupant_mt = {};
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23 occupant_mt.__index = occupant_mt;
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24
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25 local function new_occupant(bare_real_jid, nick)
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26 return setmetatable({
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27 bare_jid = bare_real_jid;
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28 nick = nick; -- in-room jid
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29 sessions = {}; -- hash from real_jid to presence stanzas. stanzas should not be modified
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30 role = nil;
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31 jid = nil; -- Primary session
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32 }, occupant_mt);
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33 end
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34
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35 -- Deep copy an occupant
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36 local function copy_occupant(occupant)
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37 local sessions = {};
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38 for full_jid, presence_stanza in pairs(occupant.sessions) do
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39 -- Don't keep unavailable presences, as they'll accumulate; unless they're the primary session
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40 if presence_stanza.attr.type ~= "unavailable" or full_jid == occupant.jid then
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41 sessions[full_jid] = presence_stanza;
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42 end
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43 end
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44 return setmetatable({
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45 bare_jid = occupant.bare_jid;
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46 nick = occupant.nick;
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47 sessions = sessions;
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48 role = occupant.role;
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49 jid = occupant.jid;
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50 }, occupant_mt);
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51 end
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52
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53 -- finds another session to be the primary (there might not be one)
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54 function occupant_mt:choose_new_primary()
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55 for jid, pr in self:each_session() do
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56 if pr.attr.type ~= "unavailable" then
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57 return jid;
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58 end
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59 end
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60 return nil;
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61 end
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62
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63 function occupant_mt:set_session(real_jid, presence_stanza, replace_primary)
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64 local pr = get_filtered_presence(presence_stanza);
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65 pr.attr.from = self.nick;
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66 pr.attr.to = real_jid;
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67
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68 self.sessions[real_jid] = pr;
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69 if replace_primary then
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70 self.jid = real_jid;
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71 elseif self.jid == nil or (pr.attr.type == "unavailable" and self.jid == real_jid) then
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72 -- Only leave an unavailable presence as primary when there are no other options
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73 self.jid = self:choose_new_primary() or real_jid;
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74 end
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75 end
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76
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77 function occupant_mt:remove_session(real_jid)
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78 -- Delete original session
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79 self.sessions[real_jid] = nil;
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80 if self.jid == real_jid then
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81 self.jid = self:choose_new_primary();
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82 end
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83 end
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84
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85 function occupant_mt:each_session()
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86 return pairs(self.sessions)
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87 end
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88
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89 function occupant_mt:get_presence(real_jid)
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90 return self.sessions[real_jid or self.jid]
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91 end
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92
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93 return {
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94 new = new_occupant;
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95 copy = copy_occupant;
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96 mt = occupant_mt;
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97 }