annotate mod_pubsub_text_interface/mod_pubsub_text_interface.lua @ 5186:fa3059e653fa

mod_http_oauth2: Implement the Implicit flow Everyone says this is insecure and bad, but it's also the only thing that makes sense for e.g. pure JavaScript clients, but hey implement this even more complicated thing instead!
author Kim Alvefur <zash@zash.se>
date Thu, 02 Mar 2023 22:06:50 +0100
parents e0d0ef564095
children
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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 -- FIXME better word for "node"
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22
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23 local friendly_pubsub_errors = {
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24 ["forbidden"] = "You are not allowed to do that";
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25 ["item-not-found"] = "That node does not exist";
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26 ["internal-server-error"] = "Something went wrong (see server logs)";
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27 ["not-subscribed"] = "You were not subscribed";
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28 };
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29
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30 module:hook("message/host", function (event)
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31 local stanza = event.stanza;
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32 local body = stanza:get_child_text("body");
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33 if not body then return end -- bail out
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34
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35 local from = stanza.attr.from;
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36
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37 local reply = st.reply(stanza);
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38 reply.attr.id = id.medium();
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39
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40 local command, node_arg = body:match("^(%a+)%s+(.*)");
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41 command = (command or body):lower();
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42
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43 if command == "help" then
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44 reply:body(help):up();
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45 reply:tag("response", { xmlns = xmlns_quick_resp, value = "list", }):up();
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46 reply:tag("response", { xmlns = xmlns_quick_resp, value = "subscriptions", }):up();
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47 elseif command == "list" then
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48 local ok, nodes = pubsub:get_nodes(from);
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49 if ok then
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50 local list = {};
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51 for node, node_obj in pairs(nodes) do
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52 table.insert(list, ("- `%s` %s"):format(node, node_obj.config.title or ""));
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53 end
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54 reply:body(table.concat(list, "\n"));
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55 else
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56 reply:body(friendly_pubsub_errors[nodes] or nodes);
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57 end
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58 elseif command == "subscriptions" then
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59 local ok, subs = pubsub:get_subscriptions(nil, from, from);
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60 if not ok then
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61 reply:body(friendly_pubsub_errors[subs] or subs);
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62 elseif #subs == 0 then
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63 reply:body("You are not subscribed to anything from this pubsub service");
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64 else
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65 local response = {};
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66 for i = 1, #subs do
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67 response[i] = string.format("- `%s`", subs[i].node);
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68 reply:tag("response", { xmlns = xmlns_quick_resp, value = "unsubscribe "..subs[i].node, }):up();
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69 reply:tag("response", { xmlns = xmlns_quick_resp, value = "last "..subs[i].node, }):up();
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70 end
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71 reply:body(table.concat(response, "\n"));
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72 end
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73 elseif command == "subscribe" then
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74 local ok, err = pubsub:add_subscription(node_arg, from, jid.bare(from), { ["pubsub#include_body"] = true });
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75 reply:body(ok and "OK" or friendly_pubsub_errors[err] or err);
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76 elseif command == "unsubscribe" then
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77 local ok, err = pubsub:remove_subscription(node_arg, from, jid.bare(from));
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78 reply:body(ok and "OK" or friendly_pubsub_errors[err] or err);
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79 elseif command == "last" and pubsub.get_last_item then
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80 local ok, item_id, item = pubsub:get_last_item(node_arg, from);
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81 if not ok then
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82 reply:body(friendly_pubsub_errors[item_id] or item_id);
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83 elseif not item_id then
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84 reply:body("That node does not contain any items");
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85 else
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86 pubsub.config.broadcaster("items", node_arg, {
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87 [from] = { ["pubsub#include_body"] = true }
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88 }, item, nil, pubsub.nodes[node_arg]);
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89 reply:body("OK");
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90 end
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91 else
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92 reply:body("Unknown command. `help` to list commands."):up();
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93 reply:tag("response", { xmlns = xmlns_quick_resp, value = "help", }):up();
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94 end
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95 reply:reset();
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96
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97 if stanza:get_child("no-copy", "urn:xmpp:hints") then
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98 reply:tag("no-copy", { xmlns = "urn:xmpp:hints" }):up();
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99 end
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100
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101 if stanza:get_child("no-store", "urn:xmpp:hints") then
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102 reply:tag("no-store", { xmlns = "urn:xmpp:hints" }):up();
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103 end
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104
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105 module:send(reply);
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106 return true;
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107 end);