annotate mod_pubsub_stats/mod_pubsub_stats.lua @ 3656:3e0f4d727825

mod_vcard_muc: Add an alternative method of signaling avatar change When the avatar has been changed, a signal is sent that the room configuration has changed. Clients then do a disco#info query to find the SHA-1 of the new avatar. They can then fetch it as before, or not if they have it cached already. This is meant to be less disruptive than signaling via presence, which caused problems for some clients. If clients transition to the new method, the old one can eventually be removed. The namespace is made up while waiting for standardization. Otherwise it is very close to what's described in https://xmpp.org/extensions/inbox/muc-avatars.html
author Kim Alvefur <zash@zash.se>
date Sun, 25 Aug 2019 20:46:43 +0200
parents b2ce818ec19c
children
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1 local st = require "util.stanza";
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3 local pubsub = module:depends"pubsub";
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5 local actor = module.host .. "/modules/" .. module.name;
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6
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7 local pubsub_xmlns = "http://jabber.org/protocol/pubsub"
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8
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9 local node = module:get_option_string(module.name .. "_node", "stats");
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10
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11 local function publish_stats(stats, stats_extra)
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12 local id = "current";
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13 local xitem = st.stanza("item", { xmlns = pubsub_xmlns, id = id })
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14 :tag("query", { xmlns = "http://jabber.org/protocol/stats" });
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16 for name, value in pairs(stats) do
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17 local stat_extra = stats_extra[name];
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18 local unit = stat_extra and stat_extra.units;
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19 xitem:tag("stat", { name = name, unit = unit, value = tostring(value) }):up();
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20 end
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21
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22 local ok, err = pubsub.service:publish(node, actor, id, xitem);
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23 if not ok then
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24 module:log("error", "Error publishing stats: %s", err);
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25 end
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26 end
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28 function module.load()
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29 pubsub.service:create(node, true, {
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30 persistent_items = false;
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31 max_items = 1;
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32 });
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33 pubsub.service:set_affiliation(node, true, actor, "publisher");
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34 end
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36 module:hook_global("stats-updated", function (event)
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37 publish_stats(event.stats, event.stats_extra);
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38 end);
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40 function module.unload()
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41 pubsub.service:delete(node, true);
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42 end
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44 module:hook("pubsub-summary/http://jabber.org/protocol/stats", function (event)
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45 local payload = event.payload;
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46 local summary = {};
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47 for stat in payload:childtags("stat") do
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48 if stat.attr.name and stat.attr.value then
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49 table.insert(summary, string.format("%s: %g %s", stat.attr.name, tonumber(stat.attr.value), stat.attr.units or ""));
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50 end
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51 end
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52 table.sort(summary);
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53 return table.concat(summary, "\n");
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54 end);
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