annotate mod_groups_muc_bookmarks/mod_groups_muc_bookmarks.lua @ 4562:28c16c93d79a

mod_limits_exception: New module to except some JIDs from rate limiting
author Matthew Wild <mwild1@gmail.com>
date Mon, 24 May 2021 15:46:11 +0100
parents b3e0295e14a3
children 240fa534f586
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b3e0295e14a3 mod_groups_muc_bookmarks: manage PEP (XEP-0048) bookmarks of group members
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1 local jid_split = require "util.jid".split;
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2
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3 local st = require "util.stanza";
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4
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5 local mod_groups = module:depends("groups_internal")
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6 local mod_pep = module:depends("pep")
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7
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8 local PUBSUB_NODE_XEP0048 = "storage:bookmarks";
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9 local XMLNS_XEP0048 = "storage:bookmarks";
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10 local XMLNS_XEP0060 = "http://jabber.org/protocol/pubsub";
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11
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12 local default_options = {
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13 ["persist_items"] = true;
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14 ["access_model"] = "whitelist";
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15 };
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16
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17 local function get_current_bookmarks(jid, service)
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18 local ok, id, item = service:get_last_item(PUBSUB_NODE_XEP0048, jid)
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19 if not ok or id == nil then
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20 if id == "item-not-found" or id == nil then
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21 -- return empty
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22 return st.stanza("storage", { xmlns = XMLNS_XEP0048 });
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23 end
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24 return nil, result
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25 end
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26 -- first item is the actual storage element
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27 local hit = item:get_child("storage", XMLNS_XEP0048);
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28 if not hit then
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29 return nil, "internal-server-error"
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30 end
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31 return hit
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32 end
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33
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34 local function update_bookmarks(jid, service, storage)
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35 local item = st.stanza("item", { xmlns = XMLNS_XEP0060, id = "current" }):add_child(storage)
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36 module:log("debug", "updating bookmarks with %q", item)
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37 local ok, err = service:publish(
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38 PUBSUB_NODE_XEP0048,
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39 jid,
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40 "current",
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41 item,
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42 default_options
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43 )
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44 if not ok then
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45 module:log("error", "failed to update bookmarks: %s", err)
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46 end
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47 end
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48
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49 local function find_matching_bookmark(storage, room)
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parents:
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50 for node in storage:childtags("conference") do
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51 if node.attr.jid == room then
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52 return node
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53 end
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54 end
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55 return nil
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56 end
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57
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58 local function inject_bookmark(jid, room, autojoin, name)
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parents:
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59 local pep_service = mod_pep.get_pep_service(jid_split(jid))
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60
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61 autojoin = autojoin or false and true
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62 local current = get_current_bookmarks(jid, pep_service)
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63 local existing = find_matching_bookmark(current, room)
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64 if existing then
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65 if autojoin ~= nil then
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66 existing.attr.autojoin = autojoin and "true" or "false"
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parents:
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67 end
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68 if name ~= nil then
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parents:
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69 -- do not change already configured names
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70 if not existing.attr.name then
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71 existing.attr.name = name
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72 end
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parents:
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73 end
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74 done = true
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parents:
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75 module:log("debug", "found existing matching bookmark, updated")
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parents:
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76 else
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parents:
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77 module:log("debug", "no existing bookmark found, adding new")
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parents:
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78 current:tag("conference", {
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79 name = name,
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80 autojoin = autojoin and "true" or "false",
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parents:
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81 jid = room,
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82 xmlns = XMLNS_XEP0048,
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83 })
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parents:
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84 end
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parents:
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85
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86 update_bookmarks(jid, pep_service, current)
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87 end
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88
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89 local function remove_bookmark(jid, room, autojoin, name)
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parents:
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90 local pep_service = mod_pep.get_pep_service(jid_split(jid))
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91
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92 autojoin = autojoin or false and true
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parents:
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93 local current = get_current_bookmarks(jid, pep_service)
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parents:
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94 current:maptags(function (node)
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parents:
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95 if node.attr.xmlns and node.attr.xmlns ~= XMLNS_XEP0048 then
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96 return node
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parents:
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97 end
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parents:
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98 if node.name ~= "conference" then
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99 return node
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parents:
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100 end
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parents:
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101 if node.attr.jid == room then
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parents:
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102 -- remove matching bookmark
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103 return nil
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104 end
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105 return node
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106 end)
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107
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108 update_bookmarks(jid, pep_service, current)
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parents:
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109 end
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110
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111 local function handle_user_added(event)
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parents:
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112 if not event.group_info.muc_jid then
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113 module:log("debug", "ignoring user added event on group %s because it has no MUC", event.id)
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114 return
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115 end
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116 local jid = event.user .. "@" .. event.host
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117 inject_bookmark(jid, event.group_info.muc_jid, true, event.group_info.name)
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118 end
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119
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120 local function handle_user_removed(event)
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121 if not event.group_info.muc_jid then
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parents:
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122 module:log("debug", "ignoring user removed event on group %s because it has no MUC", event.id)
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123 return
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124 end
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125 -- Removing the bookmark is fine as the user just lost any privilege to
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parents:
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126 -- be in the MUC (as group MUCs are members-only).
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127 local jid = event.user .. "@" .. event.host
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128 remove_bookmark(jid, event.group_info.muc_jid, true, event.group_info.name)
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parents:
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129 end
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130
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131 module:hook("group-user-added", handle_user_added)
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132 module:hook("group-user-removed", handle_user_removed)