Mercurial > prosody-modules

annotate mod_muc_moderation/mod_muc_moderation.lua @ 3902:341850e8866f

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mod_muc_moderation: Broadcast retraction via method that saves it Otherwise the retraction is not saved to history, so that those who join after it was sent are unaware of the retraction
author Kim Alvefur <zash@zash.se>
date Sat, 22 Feb 2020 21:41:31 +0100
parents a7ba6929d425
children a38e6a8a781a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Kim Alvefur <zash@zash.se>
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diff changeset
1 -- mod_muc_moderation
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2 --
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3 -- Copyright (C) 2015-2020 Kim Alvefur
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4 --
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5 -- This file is MIT licensed.
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6 --
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7 -- Implements: XEP-0425: Message Moderation
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8 --
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9 -- Imports
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10 local dt = require "util.datetime";
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11 local id = require "util.id";
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12 local jid = require "util.jid";
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13 local st = require "util.stanza";
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14
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15 -- Plugin dependencies
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16 local mod_muc = module:depends "muc";
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17
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18 local muc_util = module:require "muc/util";
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19 local valid_roles = muc_util.valid_roles;
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20
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21 local muc_log_archive = module:open_store("muc_log", "archive");
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22
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23 if not muc_log_archive.set then
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24 module:log("warn", "Selected archive storage module does not support message replacement, no tombstones will be saved");
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25 end
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26
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27 -- Namespaces
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28 local xmlns_fasten = "urn:xmpp:fasten:0";
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29 local xmlns_moderate = "urn:xmpp:message-moderate:0";
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30 local xmlns_retract = "urn:xmpp:message-retract:0";
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31
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32 -- Discovering support
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33 module:hook("muc-disco#info", function (event)
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34 event.reply:tag("feature", { var = xmlns_moderate }):up();
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35 end);
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36
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37 -- Main handling
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38 module:hook("iq-set/bare/" .. xmlns_fasten .. ":apply-to", function (event)
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39 local stanza, origin = event.stanza, event.origin;
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40
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41 -- Collect info we need
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42 local apply_to = stanza.tags[1];
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43 local moderate_tag = apply_to:get_child("moderate", xmlns_moderate);
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44 if not moderate_tag then return end -- some other kind of fastening?
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45
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46 local reason = moderate_tag:get_child_text("reason");
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47
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48 local room_jid = stanza.attr.to;
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49 local room_node = jid.split(room_jid);
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50 local room = mod_muc.get_room_from_jid(room_jid);
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51
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52 local stanza_id = apply_to.attr.id;
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53
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54 -- Permissions
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55 local actor = stanza.attr.from;
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56 local actor_nick = room:get_occupant_jid(actor);
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57 local affiliation = room:get_affiliation(actor);
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58 local role = room:get_role(actor_nick) or room:get_default_role(affiliation);
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59 if valid_roles[role or "none"] < valid_roles.moderator then
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60 origin.send(st.error_reply(stanza, "auth", "forbidden", "Insufficient privileges"));
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61 return true;
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62 end
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63
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64 -- Original stanza to base tombstone on
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65 local original, err;
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66 if muc_log_archive.get then
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67 original, err = muc_log_archive:get(room_node, stanza_id);
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68 else
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69 -- COMPAT missing :get API
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70 err = "item-not-found";
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71 for i, item in muc_log_archive:find(room_node, { key = stanza_id, limit = 1 }) do
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72 if i == stanza_id then
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73 original, err = item, nil;
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74 end
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75 end
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76 end
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77 if not original then
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78 if err == "item-not-found" then
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79 origin.send(st.error_reply(stanza, "modify", "item-not-found"));
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80 else
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81 origin.send(st.error_reply(stanza, "wait", "internal-server-error"));
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82 end
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83 return true;
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84 end
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85
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86 -- Replacements
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87 local tombstone = st.message({ from = original.attr.from, type = "groupchat", id = original.attr.id })
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88 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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89 :tag("retracted", { xmlns = xmlns_retract, stamp = dt.datetime() }):up();
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90
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91 local announcement = st.message({ from = room_jid, type = "groupchat", id = id.medium(), })
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92 :tag("apply-to", { xmlns = xmlns_fasten, id = stanza_id })
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93 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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94 :tag("retract", { xmlns = xmlns_retract }):up();
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95
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96 if reason then
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97 tombstone:text_tag("reason", reason);
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98 announcement:text_tag("reason", reason);
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99 end
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100
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101 if muc_log_archive.set then
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102 -- Tombstone
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103 local was_replaced = muc_log_archive:set(room_node, stanza_id, tombstone);
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104 if not was_replaced then
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105 origin.send(st.error_reply(stanza, "wait", "internal-server-error"));
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106 return true;
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107 end
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108 end
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109
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110 -- Done, tell people about it
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111 module:log("info", "Message with id '%s' in room %s moderated by %s, reason: %s", stanza_id, room_jid, actor, reason);
3902
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112 room:broadcast_message(announcement);
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113
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114 origin.send(st.reply(stanza));
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115 return true;
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116 end);
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117
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118 module:hook("muc-message-is-historic", function (event)
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119 -- Ensure moderation messages are stored
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120 if event.stanza.attr.from == event.room.jid then
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121 return event.stanza:get_child("apply-to", xmlns_fasten);
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122 end
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123 end, 1);