author | Kim Alvefur <zash@zash.se> |
Wed, 03 Mar 2021 11:43:38 +0100 | |
changeset 4494 | cf2bdb2aaa57 |
parent 4339 | e03dadd4f2d1 |
child 4514 | 6690586826e8 |
permissions | -rw-r--r-- |
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mod_muc_rai: New module to implement Room Activity Indicators
Matthew Wild <mwild1@gmail.com>
parents:
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local cache = require "util.cache"; |
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mod_muc_rai: New module to implement Room Activity Indicators
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local jid = require "util.jid"; |
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local st = require "util.stanza"; |
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mod_muc_rai: New module to implement Room Activity Indicators
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local max_subscribers = module:get_option_number("muc_rai_max_subscribers", 1024); |
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local muc_affiliation_store = module:open_store("config", "map"); |
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mod_muc_rai: New module to implement Room Activity Indicators
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local muc_archive = module:open_store("muc_log", "archive"); |
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mod_muc_rai: New module to implement Room Activity Indicators
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4a5c4a352b78
mod_muc_rai: Use xmlns from XEP-0437
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local xmlns_rai = "urn:xmpp:rai:0"; |
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mod_muc_rai: New module to implement Room Activity Indicators
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mod_muc_rai: New module to implement Room Activity Indicators
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local muc_markers = module:depends("muc_markers"); |
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mod_muc_rai: New module to implement Room Activity Indicators
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mod_muc_rai: New module to implement Room Activity Indicators
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-- subscriber_jid -> { [room_jid] = interested } |
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mod_muc_rai: New module to implement Room Activity Indicators
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local subscribed_users = cache.new(max_subscribers, false); |
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mod_muc_rai: New module to implement Room Activity Indicators
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-- room_jid -> { [user_jid] = interested } |
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mod_muc_rai: New module to implement Room Activity Indicators
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local interested_users = {}; |
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mod_muc_rai: New module to implement Room Activity Indicators
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-- room_jid -> last_id |
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mod_muc_rai: New module to implement Room Activity Indicators
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local room_activity_cache = cache.new(1024); |
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mod_muc_rai: New module to implement Room Activity Indicators
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|
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-- Send a single notification for a room, updating data structures as needed |
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local function send_single_notification(user_jid, room_jid) |
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local notification = st.message({ to = user_jid, from = module.host }) |
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:tag("rai", { xmlns = xmlns_rai }) |
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:text_tag("activity", room_jid) |
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:up(); |
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local interested_room_users = interested_users[room_jid]; |
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mod_muc_rai: New module to implement Room Activity Indicators
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if interested_room_users then |
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mod_muc_rai: New module to implement Room Activity Indicators
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interested_room_users[user_jid] = nil; |
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end |
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local interested_rooms = subscribed_users:get(user_jid); |
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if interested_rooms then |
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mod_muc_rai: New module to implement Room Activity Indicators
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interested_rooms[room_jid] = nil; |
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mod_muc_rai: New module to implement Room Activity Indicators
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end |
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module:log("debug", "Sending notification from %s to %s", room_jid, user_jid); |
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mod_muc_rai: New module to implement Room Activity Indicators
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return module:send(notification); |
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mod_muc_rai: New module to implement Room Activity Indicators
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end |
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mod_muc_rai: New module to implement Room Activity Indicators
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local function subscribe_room(user_jid, room_jid) |
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local interested_rooms = subscribed_users:get(user_jid); |
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mod_muc_rai: New module to implement Room Activity Indicators
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if not interested_rooms then |
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mod_muc_rai: New module to implement Room Activity Indicators
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return nil, "not-subscribed"; |
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mod_muc_rai: New module to implement Room Activity Indicators
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end |
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mod_muc_rai: New module to implement Room Activity Indicators
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module:log("debug", "Subscribed %s to %s", user_jid, room_jid); |
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interested_rooms[room_jid] = true; |
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mod_muc_rai: New module to implement Room Activity Indicators
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|
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local interested_room_users = interested_users[room_jid]; |
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if not interested_room_users then |
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interested_room_users = {}; |
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interested_users[room_jid] = interested_room_users; |
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end |
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interested_room_users[user_jid] = true; |
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return true; |
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end |
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local function unsubscribe_room(user_jid, room_jid) |
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local interested_rooms = subscribed_users:get(user_jid); |
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if not interested_rooms then |
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return nil, "not-subscribed"; |
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end |
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interested_rooms[room_jid] = nil; |
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|
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local interested_room_users = interested_users[room_jid]; |
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mod_muc_rai: New module to implement Room Activity Indicators
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if not interested_room_users then |
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return true; |
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end |
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interested_room_users[user_jid] = nil; |
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return true; |
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end |
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local function notify_interested_users(room_jid) |
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module:log("warn", "NOTIFYING FOR %s", room_jid) |
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local interested_room_users = interested_users[room_jid]; |
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if not interested_room_users then |
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module:log("debug", "Nobody interested in %s", room_jid); |
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return; |
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end |
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for user_jid in pairs(interested_room_users) do |
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send_single_notification(user_jid, room_jid); |
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end |
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return true; |
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end |
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|
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local function unsubscribe_user_from_all_rooms(user_jid) |
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local interested_rooms = subscribed_users:get(user_jid); |
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if not interested_rooms then |
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return nil, "not-subscribed"; |
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end |
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for room_jid in pairs(interested_rooms) do |
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unsubscribe_room(user_jid, room_jid); |
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end |
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return true; |
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end |
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|
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local function get_last_room_message_id(room_jid) |
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local last_room_message_id = room_activity_cache:get(room_jid); |
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if last_room_message_id then |
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return last_room_message_id; |
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end |
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|
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-- Load all the data! |
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102 |
local query = { |
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limit = 1; |
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reverse = true; |
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with = "message<groupchat"; |
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} |
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local data, err = muc_archive:find(jid.node(room_jid), query); |
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|
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if not data then |
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110 |
module:log("error", "Could not fetch history: %s", err); |
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111 |
return nil; |
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112 |
end |
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|
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local id = data(); |
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room_activity_cache:set(room_jid, id); |
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return id; |
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117 |
end |
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118 |
|
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local function update_room_activity(room_jid, last_id) |
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room_activity_cache:set(room_jid, last_id); |
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121 |
end |
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122 |
|
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local function get_last_user_read_id(user_jid, room_jid) |
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return muc_markers.get_user_read_marker(jid.bare(user_jid), room_jid); |
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125 |
end |
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126 |
|
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local function has_new_activity(room_jid, user_jid) |
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128 |
local last_room_message_id = get_last_room_message_id(room_jid); |
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129 |
local last_user_read_id = get_last_user_read_id(user_jid, room_jid); |
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module:log("debug", "Checking activity in <%s> (%s) for <%s> (%s): %s", |
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131 |
room_jid, last_room_message_id, |
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user_jid, last_user_read_id, |
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tostring(last_room_message_id ~= last_user_read_id) |
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134 |
); |
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return last_room_message_id ~= last_user_read_id; |
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136 |
end |
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137 |
|
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-- Returns a set of rooms that a user is interested in |
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139 |
local function get_interested_rooms(user_jid) |
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140 |
-- Use affiliation as an indication of interest, return |
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141 |
-- all rooms a user is affiliated |
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142 |
return muc_affiliation_store:get_all(jid.bare(user_jid)); |
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143 |
end |
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144 |
|
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145 |
local function is_subscribed(user_jid) |
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146 |
return not not subscribed_users:get(user_jid); |
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147 |
end |
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148 |
|
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149 |
-- Subscribes to all rooms that the user has an interest in |
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150 |
-- Returns a set of room JIDs that have already had activity (thus no subscription) |
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151 |
local function subscribe_all_rooms(user_jid) |
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152 |
if is_subscribed(user_jid) then |
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153 |
return nil; |
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154 |
end |
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155 |
|
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156 |
-- Send activity notifications for all relevant rooms |
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157 |
local interested_rooms, err = get_interested_rooms(user_jid); |
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158 |
|
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159 |
if not interested_rooms then |
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160 |
if err then |
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161 |
return nil, "internal-server-error"; |
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162 |
end |
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163 |
interested_rooms = {}; |
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164 |
end |
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165 |
|
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166 |
if not subscribed_users:set(user_jid, {}) then |
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167 |
module:log("warn", "Subscriber limit (%d) reached, rejecting subscription from %s", max_subscribers, user_jid); |
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168 |
return nil, "resource-constraint"; |
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169 |
end |
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170 |
|
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171 |
local rooms_with_activity; |
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172 |
for room_name in pairs(interested_rooms) do |
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173 |
local room_jid = room_name.."@"..module.host; |
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174 |
if has_new_activity(room_jid, user_jid) then |
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175 |
-- There has already been activity, include this room |
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176 |
-- in the response |
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177 |
if not rooms_with_activity then |
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178 |
rooms_with_activity = {}; |
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179 |
end |
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180 |
rooms_with_activity[room_jid] = true; |
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181 |
else |
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182 |
-- Subscribe to any future activity |
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183 |
subscribe_room(user_jid, room_jid); |
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184 |
end |
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185 |
end |
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186 |
return rooms_with_activity; |
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187 |
end |
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|
188 |
|
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|
189 |
--- FIXME: |
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|
190 |
-- The subscribe/unsubscribe code below doesn't work in the case where |
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|
191 |
-- the user joins from multiple resources with the same nick. |
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|
192 |
-- |
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|
193 |
-- For example, resource A joining, followed by resource B joining, followed |
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|
194 |
-- by A leaving and B leaving will ultimately trigger muc-occupant-joined for |
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195 |
-- resource A and muc-occupant-left for resource B. |
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|
196 |
|
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|
197 |
module:hook("muc-occupant-joined", function(event) |
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|
198 |
local room_jid, user_jid = event.room.jid, event.stanza.attr.from; |
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|
199 |
local ok, _ = unsubscribe_room(user_jid, room_jid); |
4281
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|
200 |
if ok then |
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|
201 |
module:log("debug", "Unsubscribed %s to %s Reason: muc-occupant-joined", user_jid, room_jid) |
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|
202 |
end |
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|
203 |
end); |
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|
204 |
|
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|
205 |
module:hook("muc-occupant-left", function(event) |
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|
206 |
local room_jid, user_jid = event.room.jid, event.occupant.jid; |
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207 |
local ok, _ = subscribe_room(user_jid, room_jid); |
4281
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208 |
if ok then |
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|
209 |
module:log("debug", "Subscribed %s to %s Reason: muc-occupant-left", user_jid, room_jid) |
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210 |
end |
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|
211 |
end); |
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|
212 |
|
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213 |
module:hook("presence/host", function (event) |
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214 |
local origin, stanza = event.origin, event.stanza; |
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215 |
local user_jid = stanza.attr.from; |
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|
216 |
|
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|
217 |
if stanza.attr.type == "unavailable" then -- User going offline |
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218 |
unsubscribe_user_from_all_rooms(user_jid); |
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219 |
return true; |
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|
220 |
end |
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|
221 |
|
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|
222 |
if not stanza:get_child("rai", xmlns_rai) then |
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|
223 |
return; -- Ignore, no <rai/> tag |
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|
224 |
end |
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local rooms_with_activity, err = subscribe_all_rooms(user_jid); |
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|
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if not rooms_with_activity then |
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if not err then |
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module:log("debug", "No activity to notify"); |
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return true; |
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else |
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return origin.send(st.error_reply(stanza, "wait", "resource-constraint")); |
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end |
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end |
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|
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local reply = st.message({ to = stanza.attr.from, from = module.host }) |
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:tag("rai", { xmlns = xmlns_rai }); |
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for room_jid in pairs(rooms_with_activity) do |
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reply:text_tag("activity", room_jid); |
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end |
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return origin.send(reply); |
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end); |
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|
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module:hook("muc-broadcast-message", function (event) |
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local room, stanza = event.room, event.stanza; |
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local archive_id = stanza:get_child("stanza-id", "urn:xmpp:sid:0"); |
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if archive_id and archive_id.attr.id then |
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-- Remember the id of the last message so we can compare it |
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-- to the per-user marker (managed by mod_muc_markers) |
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update_room_activity(room.jid, archive_id.attr.id); |
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-- Notify any users that need to be notified |
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notify_interested_users(room.jid); |
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end |
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end, -1); |