annotate mod_pubsub_text_interface/mod_pubsub_text_interface.lua @ 3243:ca856a892719

mod_pubsub_text_interface: A chat interface to PubSub This module lets you manage subscriptions to pubsub nodes via simple chat messages. Subscriptions are always added based on bare JID. The include_body flag is enabled so that a plain text body version of events can be included, where supported.
author Kim Alvefur <zash@zash.se>
date Mon, 20 Aug 2018 17:09:20 +0200
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children ada7a0c7221c
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ca856a892719 mod_pubsub_text_interface: A chat interface to PubSub
Kim Alvefur <zash@zash.se>
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1 local st = require "util.stanza";
ca856a892719 mod_pubsub_text_interface: A chat interface to PubSub
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2 local jid = require "util.jid";
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3
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4 local pubsub = module:depends "pubsub".service;
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5
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6 local name = module:get_option_string("name", "PubSub Service on "..module.host);
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7 local help = name..[[
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8
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9 Commands:
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10
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11 - `help` - this help message
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12 - `list` - list available nodes
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13 - `subscribe node` - subscribe to a node
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14 - `unsubscribe node` - unsubscribe from a node
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15 ]];
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16
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17 module:hook("message/host", function (event)
ca856a892719 mod_pubsub_text_interface: A chat interface to PubSub
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18 local origin, stanza = event.origin, event.stanza;
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19 local body = stanza:get_child_text("body");
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20 if not body then return end -- bail out
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21 body = body:lower();
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22
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23 local from = stanza.attr.from;
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24
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25 local reply = st.reply(stanza);
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26
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27 if body == "help" then
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28 reply:body(help);
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29 elseif body == "list" then
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30 local ok, nodes = pubsub:get_nodes(from);
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31 if ok then
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32 local list = {};
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33 for node, node_obj in pairs(nodes) do
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34 table.insert(list, ("- `%s` %s"):format(node, node_obj.config.title or ""));
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35 end
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36 reply:body(table.concat(list, "\n"));
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37 else
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38 reply:body(nodes);
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39 end
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40 end
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41 local command, node = body:match("^(%a+)%s+(.*)");
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42 if command == "subscribe" then
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43 local ok, err = pubsub:add_subscription(node, from, jid.bare(from), { ["pubsub#include_body"] = true });
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44 reply:body(ok and "OK" or err);
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45 elseif command == "unsubscribe" then
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46 local ok, err = pubsub:remove_subscription(node, from, jid.bare(from));
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47 reply:body(ok and "OK" or err);
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48 else
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49 reply:body("Unknown command. `help` to list commands.");
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50 end
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51 origin.send(reply);
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52 return true;
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53 end);