prosody
402d8febfa43
plugins/mod_pubsub/mod_pubsub.lua

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plugins/mod_pubsub/mod_pubsub.lua @ 8848:402d8febfa43

MUC: Advertise in whether participants are allowed to change the subject (#1155)
author Kim Alvefur <zash@zash.se>
date Fri, 01 Jun 2018 08:02:43 +0200
parent 8815:5974c9da1391
child 8946:3a095233e178
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local pubsub = require "util.pubsub";
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2 local st = require "util.stanza";
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3 local jid_bare = require "util.jid".bare;
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4 local usermanager = require "core.usermanager";
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5 local new_id = require "util.id".medium;
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6
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7 local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
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8 local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
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9 local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";
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10
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11 local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
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12 local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
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13 local pubsub_disco_name = module:get_option_string("name", "Prosody PubSub Service");
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14 local expose_publisher = module:get_option_boolean("expose_publisher", false)
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15
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16 local enable_persistence = module:get_option_boolean("experimental_pubsub_item_persistence", false);
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17
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18 local service;
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19
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20 local lib_pubsub = module:require "pubsub";
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21
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22 module:depends("disco");
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23 module:add_identity("pubsub", "service", pubsub_disco_name);
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24 module:add_feature("http://jabber.org/protocol/pubsub");
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25
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26 function handle_pubsub_iq(event)
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27 return lib_pubsub.handle_pubsub_iq(event, service);
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28 end
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29
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30 local node_store = module:open_store(module.name.."_nodes");
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31
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32 local function create_simple_itemstore(node_config, node_name)
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33 local archive = module:open_store("pubsub_"..node_name, "archive");
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34 return lib_pubsub.archive_itemstore(archive, node_config, nil, node_name);
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35 end
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36
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37 if enable_persistence then
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38 module:log("warn", "Item persistence is an experimental feature. Note that ownership information is lost on restart.")
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39 else
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40 create_simple_itemstore = nil;
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41 end
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42
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43
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44 function simple_broadcast(kind, node, jids, item, actor, node_obj)
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45 if item then
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46 item = st.clone(item);
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47 item.attr.xmlns = nil; -- Clear the pubsub namespace
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48 if expose_publisher and actor then
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49 item.attr.publisher = actor
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50 end
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51 end
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52
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53 local id = new_id();
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54 local msg_type = node_obj and node_obj.config.message_type or "headline";
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55 local message = st.message({ from = module.host, type = msg_type, id = id })
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56 :tag("event", { xmlns = xmlns_pubsub_event })
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57 :tag(kind, { node = node })
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58 :add_child(item);
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59
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60 -- Compose a sensible textual representation of at least Atom payloads
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61 if node_obj and node_obj.config.include_body and item.tags[1] then
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62 local payload = item.tags[1];
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63 if payload.attr.xmlns == "http://www.w3.org/2005/Atom" then
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64 message:reset();
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65 local title = payload:get_child_text("title");
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66 local summary = payload:get_child_text("summary");
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67 if not summary and title then
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68 local author = payload:find("author/name#");
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69 summary = title;
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70 if author then
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71 summary = author .. " posted " .. summary;
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72 end
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73 end
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74 if summary then
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75 message:body(summary);
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76 end
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77 end
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78 end
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79
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80 module:broadcast(jids, message, pairs);
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81 end
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82
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83 function is_item_stanza(item)
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84 return st.is_stanza(item) and item.attr.xmlns == xmlns_pubsub and item.name == "item";
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85 end
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86
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87 module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
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88 module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
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89
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90 local function add_disco_features_from_service(service) --luacheck: ignore 431/service
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91 for feature in lib_pubsub.get_feature_set(service) do
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92 module:add_feature(xmlns_pubsub.."#"..feature);
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93 end
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94 end
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95
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96 module:hook("host-disco-info-node", function (event)
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97 local stanza, reply, node = event.stanza, event.reply, event.node;
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98 local ok, ret = service:get_nodes(stanza.attr.from);
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99 if not ok or not ret[node] then
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100 return;
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101 end
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102 event.exists = true;
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103 reply:tag("identity", { category = "pubsub", type = "leaf" });
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104 end);
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105
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106 module:hook("host-disco-items-node", function (event)
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107 local stanza, reply, node = event.stanza, event.reply, event.node;
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108 local ok, ret = service:get_items(node, stanza.attr.from);
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109 if not ok then
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110 return;
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111 end
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112
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113 for _, id in ipairs(ret) do
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114 reply:tag("item", { jid = module.host, name = id }):up();
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115 end
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116 event.exists = true;
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117 end);
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118
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119
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120 module:hook("host-disco-items", function (event)
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121 local stanza, reply = event.stanza, event.reply;
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122 local ok, ret = service:get_nodes(stanza.attr.from);
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123 if not ok then
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124 return;
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125 end
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126 for node, node_obj in pairs(ret) do
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127 reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up();
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128 end
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129 end);
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130
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131 local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
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132 local function get_affiliation(jid)
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133 local bare_jid = jid_bare(jid);
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134 if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
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135 return admin_aff;
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136 end
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137 end
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138
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139 function set_service(new_service)
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140 service = new_service;
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141 module.environment.service = service;
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142 add_disco_features_from_service(service);
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143 end
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144
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145 function module.save()
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146 return { service = service };
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147 end
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148
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149 function module.restore(data)
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150 set_service(data.service);
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151 end
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152
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153 function module.load()
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154 if module.reloading then return; end
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155
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156 set_service(pubsub.new({
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157 capabilities = {
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158 none = {
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159 create = false;
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160 publish = false;
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161 retract = false;
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162 get_nodes = true;
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163
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164 subscribe = true;
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165 unsubscribe = true;
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166 get_subscription = true;
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167 get_subscriptions = true;
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168 get_items = true;
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169
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170 subscribe_other = false;
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171 unsubscribe_other = false;
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172 get_subscription_other = false;
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173 get_subscriptions_other = false;
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174
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175 be_subscribed = true;
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176 be_unsubscribed = true;
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177
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178 set_affiliation = false;
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179 };
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180 publisher = {
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181 create = false;
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182 publish = true;
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183 retract = true;
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184 get_nodes = true;
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185
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186 subscribe = true;
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187 unsubscribe = true;
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188 get_subscription = true;
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189 get_subscriptions = true;
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190 get_items = true;
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191
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192 subscribe_other = false;
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193 unsubscribe_other = false;
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194 get_subscription_other = false;
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195 get_subscriptions_other = false;
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196
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197 be_subscribed = true;
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198 be_unsubscribed = true;
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199
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200 set_affiliation = false;
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201 };
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202 owner = {
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203 create = true;
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204 publish = true;
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205 retract = true;
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206 delete = true;
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207 get_nodes = true;
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208 configure = true;
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209
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210 subscribe = true;
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211 unsubscribe = true;
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212 get_subscription = true;
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213 get_subscriptions = true;
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214 get_items = true;
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215
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216
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217 subscribe_other = true;
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218 unsubscribe_other = true;
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219 get_subscription_other = true;
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220 get_subscriptions_other = true;
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221
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222 be_subscribed = true;
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223 be_unsubscribed = true;
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224
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225 set_affiliation = true;
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226 };
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227 };
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228
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229 autocreate_on_publish = autocreate_on_publish;
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230 autocreate_on_subscribe = autocreate_on_subscribe;
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231
8504
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232 nodestore = node_store;
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233 itemstore = create_simple_itemstore;
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234 broadcaster = simple_broadcast;
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235 itemcheck = is_item_stanza;
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236 get_affiliation = get_affiliation;
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237
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238 normalize_jid = jid_bare;
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239 }));
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240 end