mod_pep: Wipe pubsub service on user deletion
Data is already wiped from storage, but this ensures everything is
properly unsubscribed, possibly with notifications etc.
Clears recipient cache as well, since it is no longer relevant.
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local base64 = require "util.encodings".base64.encode;
local sha1 = require "util.hashes".sha1;
local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat;
local ipairs = ipairs;
local _ENV = nil;
-- luacheck: std none
local function calculate_hash(disco_info)
local identities, features, extensions = {}, {}, {};
for _, tag in ipairs(disco_info) do
if tag.name == "identity" then
t_insert(identities, (tag.attr.category or "").."\0"..(tag.attr.type or "").."\0"..(tag.attr["xml:lang"] or "").."\0"..(tag.attr.name or ""));
elseif tag.name == "feature" then
t_insert(features, tag.attr.var or "");
elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then
local form = {};
local FORM_TYPE;
for _, field in ipairs(tag.tags) do
if field.name == "field" and field.attr.var then
local values = {};
for _, val in ipairs(field.tags) do
val = #val.tags == 0 and val:get_text();
if val then t_insert(values, val); end
end
t_sort(values);
if field.attr.var == "FORM_TYPE" then
FORM_TYPE = values[1];
elseif #values > 0 then
t_insert(form, field.attr.var.."\0"..t_concat(values, "<"));
else
t_insert(form, field.attr.var);
end
end
end
t_sort(form);
form = t_concat(form, "<");
if FORM_TYPE then form = FORM_TYPE.."\0"..form; end
t_insert(extensions, form);
end
end
t_sort(identities);
t_sort(features);
t_sort(extensions);
if #identities > 0 then identities = t_concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end
if #features > 0 then features = t_concat(features, "<").."<"; else features = ""; end
if #extensions > 0 then extensions = t_concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end
local S = identities..features..extensions;
local ver = base64(sha1(S));
return ver, S;
end
return {
calculate_hash = calculate_hash;
};