Mercurial > prosody-modules

annotate mod_muc_moderation/mod_muc_moderation.lua @ 5616:59d5fc50f602

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mod_http_oauth2: Implement refresh token rotation Makes refresh tokens one-time-use, handing out a new refresh token with each access token. Thus if a refresh token is stolen and used by an attacker, the next time the legitimate client tries to use the previous refresh token, it will not work and the attack will be noticed. If the attacker does not use the refresh token, it becomes invalid after the legitimate client uses it. This behavior is recommended by draft-ietf-oauth-security-topics
author Kim Alvefur <zash@zash.se>
date Sun, 23 Jul 2023 02:56:08 +0200
parents 2e30af180da5
children 5ccc03c33158
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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_occupant_id = "urn:xmpp:occupant-id:0";
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31 local xmlns_retract = "urn:xmpp:message-retract:0";
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32
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33 -- Discovering support
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34 module:hook("muc-disco#info", function (event)
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35 event.reply:tag("feature", { var = xmlns_moderate }):up();
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36 end);
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37
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38 -- TODO error registry, requires Prosody 0.12+
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39
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40 -- moderate : function (string, string, string, boolean, string) : boolean, enum, enum, string
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41 local function moderate(actor, room_jid, stanza_id, retract, reason)
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42 local room_node = jid.split(room_jid);
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43 local room = mod_muc.get_room_from_jid(room_jid);
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44
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45 -- Permissions is based on role, which is a property of a current occupant,
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46 -- so check if the actor is an occupant, otherwise if they have a reserved
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47 -- nickname that can be used to retrieve the role.
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48 local actor_nick = room:get_occupant_jid(actor);
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49 if not actor_nick then
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50 local reserved_nickname = room:get_affiliation_data(jid.bare(actor), "reserved_nickname");
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51 if reserved_nickname then
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52 actor_nick = room.jid .. "/" .. reserved_nickname;
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53 end
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54 end
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55
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56 -- Retrieve their current role, iff they are in the room, otherwise what they
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57 -- would have based on affiliation.
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58 local affiliation = room:get_affiliation(actor);
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59 local role = room:get_role(actor_nick) or room:get_default_role(affiliation);
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60 if valid_roles[role or "none"] < valid_roles.moderator then
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61 return false, "auth", "forbidden", "You need a role of at least 'moderator'";
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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
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78 if not original then
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79 if err == "item-not-found" then
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80 return false, "modify", "item-not-found";
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81 else
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82 return false, "wait", "internal-server-error";
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83 end
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84 end
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85
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86
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87 local announcement = st.message({ from = room_jid, type = "groupchat", id = id.medium(), })
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88 :tag("apply-to", { xmlns = xmlns_fasten, id = stanza_id })
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89 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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90
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91 if retract then
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92 announcement:tag("retract", { xmlns = xmlns_retract }):up();
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93 end
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94
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95 if reason then
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96 announcement:text_tag("reason", reason);
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97 end
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98
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99 local moderated_occupant_id = original:get_child("occupant-id", xmlns_occupant_id);
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100 if room.get_occupant_id and moderated_occupant_id then
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101 announcement:add_direct_child(moderated_occupant_id);
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102 end
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103
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104 local actor_occupant = room:get_occupant_by_real_jid(actor) or room:new_occupant(jid.bare(actor), actor_nick);
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105 if room.get_occupant_id then
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106 -- This isn't a regular broadcast message going through the events occupant_id.lib hooks so we do this here
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107 announcement:add_direct_child(st.stanza("occupant-id", { xmlns = xmlns_occupant_id; id = room:get_occupant_id(actor_occupant) }))
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108 end
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109
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110 if muc_log_archive.set and retract then
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111 local tombstone = st.message({ from = original.attr.from, type = "groupchat", id = original.attr.id })
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112 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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113 :tag("retracted", { xmlns = xmlns_retract, stamp = dt.datetime() }):up();
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114
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115 if room.get_occupant_id then
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116 tombstone:add_direct_child(st.stanza("occupant-id", { xmlns = xmlns_occupant_id; id = room:get_occupant_id(actor_occupant) }))
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117
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118 if moderated_occupant_id then
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119 -- Copy occupant id from moderated message
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parents: 5611
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120 tombstone:add_child(moderated_occupant_id);
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parents: 5611
diff changeset
121 end
5611
06fad22672e1 mod_muc_moderation: Copy XEP-0421 occupant-id from retracted message
Kim Alvefur <zash@zash.se>
parents: 5170
diff changeset
122 end
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parents: 5170
diff changeset
123
4814
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Kim Alvefur <zash@zash.se>
parents: 4806
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124 if reason then
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Kim Alvefur <zash@zash.se>
parents: 4806
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125 tombstone:text_tag("reason", reason);
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Kim Alvefur <zash@zash.se>
parents: 4806
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126 end
5169
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parents: 4814
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127 tombstone:reset();
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parents: 4806
diff changeset
128
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parents:
diff changeset
129 local was_replaced = muc_log_archive:set(room_node, stanza_id, tombstone);
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parents:
diff changeset
130 if not was_replaced then
5169
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parents: 4814
diff changeset
131 return false, "wait", "internal-server-error";
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parents:
diff changeset
132 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
133 end
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parents:
diff changeset
134
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
135 -- Done, tell people about it
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
136 module:log("info", "Message with id '%s' in room %s moderated by %s, reason: %s", stanza_id, room_jid, actor, reason);
3902
341850e8866f mod_muc_moderation: Broadcast retraction via method that saves it
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parents: 3901
diff changeset
137 room:broadcast_message(announcement);
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parents:
diff changeset
138
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parents: 4814
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139 return true;
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
140 end
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
141
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
142 -- Main handling
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
143 module:hook("iq-set/bare/" .. xmlns_fasten .. ":apply-to", function (event)
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
144 local stanza, origin = event.stanza, event.origin;
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parents: 4814
diff changeset
145
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
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parents: 4814
diff changeset
146 local actor = stanza.attr.from;
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parents: 4814
diff changeset
147 local room_jid = stanza.attr.to;
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parents: 4814
diff changeset
148
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
149 -- Collect info we need
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
150 local apply_to = stanza.tags[1];
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
151 local moderate_tag = apply_to:get_child("moderate", xmlns_moderate);
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
152 if not moderate_tag then return end -- some other kind of fastening?
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
153
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
154 local reason = moderate_tag:get_child_text("reason");
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
155 local retract = moderate_tag:get_child("retract", xmlns_retract);
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
156
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
157 local stanza_id = apply_to.attr.id;
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Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
158
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
159 local ok, error_type, error_condition, error_text = moderate(actor, room_jid, stanza_id, retract, reason);
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
160 if not ok then
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
161 origin.send(st.error_reply(stanza, error_type, error_condition, error_text));
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
162 return true;
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
163 end
1071a420ff6f mod_muc_moderation: Refactor to prepare for new version of XEP-0425
Kim Alvefur <zash@zash.se>
parents: 4814
diff changeset
164
3897
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
165 origin.send(st.reply(stanza));
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
166 return true;
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
167 end);
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
168
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
169 module:hook("muc-message-is-historic", function (event)
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
170 -- Ensure moderation messages are stored
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
171 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:
diff changeset
172 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>
parents:
diff changeset
173 end
3a96070f4a14 mod_muc_moderation: Initial commit of XEP-0425: Message Moderation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
174 end, 1);