annotate mod_pubsub_text_interface/mod_pubsub_text_interface.lua @ 5119:048e339706ba

mod_rest: Remove manual reference expansion in schema This hack was originally added to reduce the number of definitions of common attributes (type, to, from etc) and payloads (e.g. delay). This predated pointers and references, and until now was needed because parsing picked out the correct stanza kind from the schema, which broke internal references. Removing this hack paves the way for allowing the schema to be configured or customized more easily.
author Kim Alvefur <zash@zash.se>
date Tue, 20 Dec 2022 21:48:28 +0100
parents 25ce28711fac
children d7652471ae3e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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ca856a892719 mod_pubsub_text_interface: A chat interface to PubSub
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1 local st = require "util.stanza";
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2 local jid = require "util.jid";
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3 local id = require "util.id";
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4
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5 local pubsub = module:depends "pubsub".service;
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6
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7 local xmlns_quick_resp = "urn:xmpp:tmp:quick-response";
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8 local name = module:get_option_string("name", "PubSub Service on "..module.host);
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9 local help = name..[[
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10
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11 Commands:
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12
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13 - `help` - this help message
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14 - `list` - list available nodes
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15 - `subscriptions` - list nodes you are subscribed to
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16 - `subscribe node` - subscribe to a node
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17 - `unsubscribe node` - unsubscribe from a node]];
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18 if pubsub.get_last_item then -- COMPAT not available in 0.10
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19 help = help .. "\n- `last node` - send the last item (again)"
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20 end
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21
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22 module:hook("message/host", function (event)
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23 local stanza = event.stanza;
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24 local body = stanza:get_child_text("body");
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25 if not body then return end -- bail out
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26
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27 local from = stanza.attr.from;
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28
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29 local reply = st.reply(stanza);
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30 reply.attr.id = id.medium();
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31
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32 local command, node_arg = body:match("^(%a+)%s+(.*)");
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33 command = (command or body):lower();
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34
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35 if command == "help" then
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36 reply:body(help):up();
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37 reply:tag("response", { xmlns = xmlns_quick_resp, value = "list", }):up();
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38 reply:tag("response", { xmlns = xmlns_quick_resp, value = "subscriptions", }):up();
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39 elseif command == "list" then
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40 local ok, nodes = pubsub:get_nodes(from);
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41 if ok then
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42 local list = {};
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43 for node, node_obj in pairs(nodes) do
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44 table.insert(list, ("- `%s` %s"):format(node, node_obj.config.title or ""));
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45 end
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46 reply:body(table.concat(list, "\n"));
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47 else
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48 reply:body(nodes);
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49 end
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50 elseif command == "subscriptions" then
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51 local ok, subs = pubsub:get_subscriptions(nil, from, from);
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52 if not ok then
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53 reply:body(subs);
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54 elseif #subs == 0 then
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55 reply:body("You are not subscribed to anything from this pubsub service");
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56 else
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57 local response = {};
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58 for i = 1, #subs do
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59 response[i] = string.format("- `%s`", subs[i].node);
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60 reply:tag("response", { xmlns = xmlns_quick_resp, value = "unsubscribe "..subs[i].node, }):up();
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61 reply:tag("response", { xmlns = xmlns_quick_resp, value = "last "..subs[i].node, }):up();
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62 end
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63 reply:body(table.concat(response, "\n"));
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64 end
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65 elseif command == "subscribe" then
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66 local ok, err = pubsub:add_subscription(node_arg, from, jid.bare(from), { ["pubsub#include_body"] = true });
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67 reply:body(ok and "OK" or err);
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68 elseif command == "unsubscribe" then
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69 local ok, err = pubsub:remove_subscription(node_arg, from, jid.bare(from));
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70 reply:body(ok and "OK" or err);
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71 elseif command == "last" and pubsub.get_last_item then
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72 local ok, item_id, item = pubsub:get_last_item(node_arg, from);
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73 if not ok then
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74 reply:body(item_id); -- err message
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75 elseif not item_id then
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76 reply:body("node is empty");
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77 else
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78 pubsub.config.broadcaster("items", node_arg, {
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79 [from] = { ["pubsub#include_body"] = true }
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80 }, item, nil, pubsub.nodes[node_arg]);
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81 reply:body("OK");
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82 end
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83 else
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84 reply:body("Unknown command. `help` to list commands."):up();
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85 reply:tag("response", { xmlns = xmlns_quick_resp, value = "help", }):up();
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86 end
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87 reply:reset();
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88
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89 if stanza:get_child("no-copy", "urn:xmpp:hints") then
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90 reply:tag("no-copy", { xmlns = "urn:xmpp:hints" }):up();
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91 end
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92
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93 if stanza:get_child("no-store", "urn:xmpp:hints") then
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94 reply:tag("no-store", { xmlns = "urn:xmpp:hints" }):up();
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95 end
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96
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97 module:send(reply);
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98 return true;
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99 end);