Mercurial > prosody-modules

annotate mod_muc_moderation/mod_muc_moderation.lua @ 4764:a754f7e380b2

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mod_dnsupdate: Rewrite port config vs DNS comparison code I'm not sure if it was correct, which means it was hard to understand and thus needed to be simplified. Hope this accomplishes that.
author Kim Alvefur <zash@zash.se>
date Mon, 08 Nov 2021 23:03:14 +0100
parents 4665df54719d
children 80f871bedcdf
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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
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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 -- Retrieve their current role, iff they are in the room, otherwise what they
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59 -- would have based on affiliation.
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60 local role = room:get_role(actor_nick) or room:get_default_role(affiliation);
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61 if valid_roles[role or "none"] < valid_roles.moderator then
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62 origin.send(st.error_reply(stanza, "auth", "forbidden", "You need a role of at least 'moderator'"));
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63 return true;
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64 end
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65
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66 if not actor_nick then
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67 local reserved_nickname = room:get_affiliation_data(jid.bare(actor), "reserved_nickname");
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68 if reserved_nickname then
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69 actor_nick = jid.join(room.jid, reserved_nickname);
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70 end
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71 end
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72
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73 -- Original stanza to base tombstone on
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74 local original, err;
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75 if muc_log_archive.get then
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76 original, err = muc_log_archive:get(room_node, stanza_id);
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77 else
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78 -- COMPAT missing :get API
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79 err = "item-not-found";
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80 for i, item in muc_log_archive:find(room_node, { key = stanza_id, limit = 1 }) do
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81 if i == stanza_id then
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82 original, err = item, nil;
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83 end
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84 end
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85 end
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86 if not original then
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87 if err == "item-not-found" then
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88 origin.send(st.error_reply(stanza, "modify", "item-not-found"));
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89 else
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90 origin.send(st.error_reply(stanza, "wait", "internal-server-error"));
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91 end
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92 return true;
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93 end
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94
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95 -- Replacements
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96 local tombstone = st.message({ from = original.attr.from, type = "groupchat", id = original.attr.id })
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97 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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98 :tag("retracted", { xmlns = xmlns_retract, stamp = dt.datetime() }):up();
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99
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100 local announcement = st.message({ from = room_jid, type = "groupchat", id = id.medium(), })
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101 :tag("apply-to", { xmlns = xmlns_fasten, id = stanza_id })
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102 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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103 :tag("retract", { xmlns = xmlns_retract }):up();
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104
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105 if reason then
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106 tombstone:text_tag("reason", reason);
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107 announcement:text_tag("reason", reason);
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108 end
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109
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110 if muc_log_archive.set then
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111 -- Tombstone
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112 local was_replaced = muc_log_archive:set(room_node, stanza_id, tombstone);
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113 if not was_replaced then
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114 origin.send(st.error_reply(stanza, "wait", "internal-server-error"));
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115 return true;
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116 end
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117 end
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118
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119 -- Done, tell people about it
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120 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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121 room:broadcast_message(announcement);
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122
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123 origin.send(st.reply(stanza));
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124 return true;
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125 end);
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126
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127 module:hook("muc-message-is-historic", function (event)
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128 -- Ensure moderation messages are stored
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129 if event.stanza.attr.from == event.room.jid then
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130 return event.stanza:get_child("apply-to", xmlns_fasten);
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131 end
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132 end, 1);