prosody-modules
8474a3b80200
mod_muc_moderation/mod_muc_moderation.lua

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mod_muc_moderation/mod_muc_moderation.lua @ 5160:8474a3b80200

mod_firewall: Fix 'is_admin' internal dependency rule #1797 (thanks diane) Looks like the boolean logic was inverted here. Instead, for now, simply check if is_admin is there. It is deprecated in trunk and was briefly removed before being brought back with a 'deprecated' warning as part of the new roles and permissions work. Making this dependency conditioned on the existence of the underlying function should make it work until it actually goes away for real.
author Kim Alvefur <zash@zash.se>
date Fri, 27 Jan 2023 23:06:25 +0100
parent 4814:5f12c75fd210
child 5169:1071a420ff6f
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diff changeset
1 -- mod_muc_moderation
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2 --
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3 -- Copyright (C) 2015-2021 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 local retract = moderate_tag:get_child("retract", xmlns_retract);
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48
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49 local room_jid = stanza.attr.to;
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50 local room_node = jid.split(room_jid);
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51 local room = mod_muc.get_room_from_jid(room_jid);
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52
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53 local stanza_id = apply_to.attr.id;
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54
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55 -- Permissions
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56 local actor = stanza.attr.from;
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57 local actor_nick = room:get_occupant_jid(actor);
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58 local affiliation = room:get_affiliation(actor);
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59 -- Retrieve their current role, iff they are in the room, otherwise what they
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60 -- would have based on affiliation.
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61 local role = room:get_role(actor_nick) or room:get_default_role(affiliation);
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62 if valid_roles[role or "none"] < valid_roles.moderator then
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63 origin.send(st.error_reply(stanza, "auth", "forbidden", "You need a role of at least 'moderator'"));
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64 return true;
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65 end
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66
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67 if not actor_nick then
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68 local reserved_nickname = room:get_affiliation_data(jid.bare(actor), "reserved_nickname");
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69 if reserved_nickname then
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70 actor_nick = room.jid .. "/" .. reserved_nickname;
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71 end
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72 end
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73
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74 -- Original stanza to base tombstone on
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75 local original, err;
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76 if muc_log_archive.get then
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77 original, err = muc_log_archive:get(room_node, stanza_id);
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78 else
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79 -- COMPAT missing :get API
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80 err = "item-not-found";
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81 for i, item in muc_log_archive:find(room_node, { key = stanza_id, limit = 1 }) do
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82 if i == stanza_id then
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83 original, err = item, nil;
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84 end
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85 end
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86 end
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87 if not original then
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88 if err == "item-not-found" then
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89 origin.send(st.error_reply(stanza, "modify", "item-not-found"));
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90 else
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91 origin.send(st.error_reply(stanza, "wait", "internal-server-error"));
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92 end
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93 return true;
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94 end
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95
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96
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97 local announcement = st.message({ from = room_jid, type = "groupchat", id = id.medium(), })
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98 :tag("apply-to", { xmlns = xmlns_fasten, id = stanza_id })
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99 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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100
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101 if retract then
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102 announcement:tag("retract", { xmlns = xmlns_retract }):up();
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103 end
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104
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105 if reason then
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106 announcement:text_tag("reason", reason);
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107 end
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108
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109 if muc_log_archive.set and retract then
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110 local tombstone = st.message({ from = original.attr.from, type = "groupchat", id = original.attr.id })
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111 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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112 :tag("retracted", { xmlns = xmlns_retract, stamp = dt.datetime() }):up();
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113
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114 if reason then
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115 tombstone:text_tag("reason", reason);
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116 end
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117
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118 local was_replaced = muc_log_archive:set(room_node, stanza_id, tombstone);
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119 if not was_replaced then
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120 origin.send(st.error_reply(stanza, "wait", "internal-server-error"));
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121 return true;
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122 end
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123 end
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parents:
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124
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125 -- Done, tell people about it
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126 module:log("info", "Message with id '%s' in room %s moderated by %s, reason: %s", stanza_id, room_jid, actor, reason);
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parents: 3901
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127 room:broadcast_message(announcement);
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128
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129 origin.send(st.reply(stanza));
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130 return true;
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131 end);
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parents:
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132
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133 module:hook("muc-message-is-historic", function (event)
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134 -- Ensure moderation messages are stored
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Kim Alvefur <zash@zash.se>
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135 if event.stanza.attr.from == event.room.jid then
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136 return event.stanza:get_child("apply-to", xmlns_fasten);
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137 end
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138 end, 1);