prosody-modules
a754f7e380b2
mod_muc_moderation/mod_muc_moderation.lua

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mod_muc_moderation/mod_muc_moderation.lua @ 4764:a754f7e380b2

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
parent 4754:4665df54719d
child 4806:80f871bedcdf
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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
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
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123 origin.send(st.reply(stanza));
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
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124 return true;
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
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125 end);
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
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126
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
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127 module:hook("muc-message-is-historic", function (event)
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
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128 -- Ensure moderation messages are stored
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
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129 if event.stanza.attr.from == event.room.jid then
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
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130 return event.stanza:get_child("apply-to", xmlns_fasten);
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
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131 end
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
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132 end, 1);