# HG changeset patch
# User Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
# Date 1625847907 -7200
# Node ID 6ca1117b81a574a874f22ecdcd97fd291d5d708f
# Parent  b935276ab1b4edf9de0842c68d39b7f31fe732d4
mod_mam: Obsolete this module, it is included in Prosody since 0.10

diff -r b935276ab1b4 -r 6ca1117b81a5 mod_mam/README.markdown
--- a/mod_mam/README.markdown	Fri Jul 09 20:54:40 2021 +0200
+++ b/mod_mam/README.markdown	Fri Jul 09 18:25:07 2021 +0200
@@ -1,129 +1,8 @@
 ---
 labels:
-- 'Stage-Merged'
+- 'Stage-Obsolete'
 summary: 'XEP-0313: Message Archive Management'
+superseded_by: mod_mam
 ...
 
-Introduction
-============
-
-Implementation of [XEP-0313: Message Archive Management].
-
-Details
-=======
-
-This module will archive all messages that match the simple rules setup
-by the user, and allow the user to access this archive.
-
-Usage
-=====
-
-First copy the module to the prosody plugins directory.
-
-Then add "mam" to your modules\_enabled list:
-
-``` {.lua}
-modules_enabled = {
-    -- ...
-    "mam",
-    -- ...
-}
-```
-
-Configuration
-=============
-
-Option summary
---------------
-
-  option                         type                    default
-  ------------------------------ ----------------------- -----------
-  max\_archive\_query\_results   number                  `50`
-  default\_archive\_policy       boolean or `"roster"`   `true`
-  archive\_expires\_after        string                  `"1w"`
-  archive\_cleanup\_interval     number                  `4*60*60`
-
-
-Storage backend
----------------
-
-mod\_mam uses the store "archive2"[^1]. See [Prosodys data storage
-documentation][doc:storage] for information on how to configure storage.
-
-For example, to use mod\_storage\_sql (requires Prosody 0.10 or later):
-
-``` {.lua}
-storage = {
-  archive2 = "sql";
-}
-```
-
-If no archive-capable storage backend can be opened then an in-memory
-one will be used as fallback.
-
-Query size limits
------------------
-
-    max_archive_query_results = 20;
-
-This is the largest number of messages that are allowed to be retrieved
-in one request *page*. A query that does not fit in one page will
-include a reference to the next page, letting clients page through the
-result set. Setting large number is not recommended, as Prosody will be
-blocked while processing the request and will not be able to do anything
-else.
-
-Archive expiry
---------------
-
-Messages in the archive will expire after some time, by default one
-week. This can be changed by setting `archive_expires_after`:
-
-``` {.lua}
-archive_expires_after = "1d" -- one day
-
-archive_expires_after = "1w" -- one week, the default
-
-archive_expires_after = "2m" -- two months
-
-archive_expires_after = "1y" -- one year
-
-archive_expires_after = 60 * 60 -- one hour
-
-archive_expires_after = "never" -- forever
-```
-
-The format is an integer number of seconds or a multiple of a period
-given by a suffix that can be one of `d` (day), `w` (week), `m` (month)
-or `y` (year). No multiplier means seconds.
-
-Message matching policy
------------------------
-
-The MAM protocol includes a way for clients to control what messages
-should be stored. This allows users to enable or disable archiving by
-default or for specific contacts.
-
-``` {.lua}
-default_archive_policy = true
-```
-
-  `default_archive_policy =`   Meaning
-  ---------------------------- ------------------------------------------------------
-  `false`                      Store no messages.
-  `"roster"`                   Store messages to/from contacts in the users roster.
-  `true`                       Store all messages. This is the default.
-
-Compatibility
-=============
-
-  ------- -----------------------
-  trunk   Included with Prosody
-  0.10    Included with Prosody
-  0.9     Works
-  0.8     Does not work
-  ------- -----------------------
-
-
-[^1]: Might be changed to "mam" at some point
-
+Since Prosody 0.10, this module is [included in Prosody](https://prosody.im/doc/modules/mod_mam), you will be redirected there shortly.
diff -r b935276ab1b4 -r 6ca1117b81a5 mod_mam/fallback_archive.lib.lua
--- a/mod_mam/fallback_archive.lib.lua	Fri Jul 09 20:54:40 2021 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,83 +0,0 @@
--- luacheck: ignore 212/self
-
-local uuid = require "util.uuid".generate;
-local store = module:shared("archive");
-local archive_store = { _provided_by = "mam"; name = "fallback"; };
-
-function archive_store:append(username, key, value, when, with)
-	local archive = store[username];
-	if not archive then
-		archive = { [0] = 0 };
-		store[username] = archive;
-	end
-	local index = (archive[0] or #archive)+1;
-	local item = { key = key, when = when, with = with, value = value };
-	if not key or archive[key] then
-		key = uuid();
-		item.key = key;
-	end
-	archive[index] = item;
-	archive[key] = index;
-	archive[0] = index;
-	return key;
-end
-
-function archive_store:find(username, query)
-	local archive = store[username] or {};
-	local start, stop, step = 1, archive[0] or #archive, 1;
-	local qstart, qend, qwith = -math.huge, math.huge;
-	local limit;
-
-	if query then
-		if query.reverse then
-			start, stop, step = stop, start, -1;
-			if query.before and archive[query.before] then
-				start = archive[query.before] - 1;
-			end
-		elseif query.after and archive[query.after] then
-			start = archive[query.after] + 1;
-		end
-		qwith = query.with;
-		limit = query.limit;
-		qstart = query.start or qstart;
-		qend = query["end"] or qend;
-	end
-
-	return function ()
-		if limit and limit <= 0 then return end
-		for i = start, stop, step do
-			local item = archive[i];
-			if (not qwith or qwith == item.with) and item.when >= qstart and item.when <= qend then
-				if limit then limit = limit - 1; end
-				start = i + step; -- Start on next item
-				return item.key, item.value, item.when, item.with;
-			end
-		end
-	end
-end
-
-function archive_store:delete(username, query)
-	if not query or next(query) == nil then
-		-- no specifics, delete everything
-		store[username] = nil;
-		return true;
-	end
-	local archive = store[username];
-	if not archive then return true; end -- no messages, nothing to delete
-
-	local qstart = query.start or -math.huge;
-	local qend = query["end"] or math.huge;
-	local qwith = query.with;
-	store[username] = nil;
-	for i = 1, #archive do
-		local item = archive[i];
-		local when, with = item.when, item.when;
-		-- Add things that don't match the query
-		if not ((not qwith or qwith == item.with) and item.when >= qstart and item.when <= qend) then
-			self:append(username, item.key, item.value, when, with);
-		end
-	end
-	return true;
-end
-
-return archive_store;
diff -r b935276ab1b4 -r 6ca1117b81a5 mod_mam/mamprefs.lib.lua
--- a/mod_mam/mamprefs.lib.lua	Fri Jul 09 20:54:40 2021 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,46 +0,0 @@
--- XEP-0313: Message Archive Management for Prosody
--- Copyright (C) 2011-2013 Kim Alvefur
---
--- This file is MIT/X11 licensed.
--- luacheck: ignore 122/prosody
-
-local global_default_policy = module:get_option("default_archive_policy", true);
-
-do
-	-- luacheck: ignore 211/prefs_format
-	local prefs_format = {
-		[false] = "roster",
-		-- default ::= true | false | "roster"
-		-- true = always, false = never, nil = global default
-		["romeo@montague.net"] = true, -- always
-		["montague@montague.net"] = false, -- newer
-	};
-end
-
-local sessions = prosody.hosts[module.host].sessions;
-local archive_store = module:get_option_string("archive_store", "archive");
-local prefs = module:open_store(archive_store .. "_prefs");
-
-local function get_prefs(user)
-	local user_sessions = sessions[user];
-	local user_prefs = user_sessions and user_sessions.archive_prefs
-	if not user_prefs then
-		user_prefs = prefs:get(user);
-		if user_sessions then
-			user_sessions.archive_prefs = user_prefs;
-		end
-	end
-	return user_prefs or { [false] = global_default_policy };
-end
-local function set_prefs(user, user_prefs)
-	local user_sessions = sessions[user];
-	if user_sessions then
-		user_sessions.archive_prefs = user_prefs;
-	end
-	return prefs:set(user, user_prefs);
-end
-
-return {
-	get = get_prefs,
-	set = set_prefs,
-}
diff -r b935276ab1b4 -r 6ca1117b81a5 mod_mam/mamprefsxml.lib.lua
--- a/mod_mam/mamprefsxml.lib.lua	Fri Jul 09 20:54:40 2021 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,57 +0,0 @@
--- XEP-0313: Message Archive Management for Prosody
--- Copyright (C) 2011-2013 Kim Alvefur
---
--- This file is MIT/X11 licensed.
-
-local st = require"util.stanza";
-
-local default_attrs = {
-	always = true, [true] = "always",
-	never = false, [false] = "never",
-	roster = "roster",
-}
-
-local function tostanza(prefs, xmlns_mam)
-	local default = prefs[false];
-	default = default_attrs[default];
-	local prefstanza = st.stanza("prefs", { xmlns = xmlns_mam, default = default });
-	local always = st.stanza("always");
-	local never = st.stanza("never");
-	for jid, choice in pairs(prefs) do
-		if jid then
-			(choice and always or never):tag("jid"):text(jid):up();
-		end
-	end
-	prefstanza:add_child(always):add_child(never);
-	return prefstanza;
-end
-local function fromstanza(prefstanza)
-	local prefs = {};
-	local default = prefstanza.attr.default;
-	if default then
-		prefs[false] = default_attrs[default];
-	end
-
-	local always = prefstanza:get_child("always");
-	if always then
-		for rule in always:childtags("jid") do
-			local jid = rule:get_text();
-			prefs[jid] = true;
-		end
-	end
-
-	local never = prefstanza:get_child("never");
-	if never then
-		for rule in never:childtags("jid") do
-			local jid = rule:get_text();
-			prefs[jid] = false;
-		end
-	end
-
-	return prefs;
-end
-
-return {
-	tostanza = tostanza;
-	fromstanza = fromstanza;
-}
diff -r b935276ab1b4 -r 6ca1117b81a5 mod_mam/mod_mam.lua
--- a/mod_mam/mod_mam.lua	Fri Jul 09 20:54:40 2021 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,433 +0,0 @@
--- XEP-0313: Message Archive Management for Prosody
--- Copyright (C) 2011-2016 Kim Alvefur
---
--- This file is MIT/X11 licensed.
-
-local xmlns_mam0    = "urn:xmpp:mam:0";
-local xmlns_mam1    = "urn:xmpp:mam:1";
-local xmlns_mam2    = "urn:xmpp:mam:2";
-local xmlns_delay   = "urn:xmpp:delay";
-local xmlns_forward = "urn:xmpp:forward:0";
-local xmlns_st_id   = "urn:xmpp:sid:0";
-
-local um = require "core.usermanager";
-local st = require "util.stanza";
-local rsm = module:require "rsm";
-local get_prefs = module:require"mamprefs".get;
-local set_prefs = module:require"mamprefs".set;
-local prefs_to_stanza = module:require"mamprefsxml".tostanza;
-local prefs_from_stanza = module:require"mamprefsxml".fromstanza;
-local jid_bare = require "util.jid".bare;
-local jid_split = require "util.jid".split;
-local jid_prepped_split = require "util.jid".prepped_split;
-local dataform = require "util.dataforms".new;
-local host = module.host;
-
-local rm_load_roster = require "core.rostermanager".load_roster;
-
-local getmetatable = getmetatable;
-local function is_stanza(x)
-	return getmetatable(x) == st.stanza_mt;
-end
-
-local tostring = tostring;
-local time_now = os.time;
-local m_min = math.min;
-local timestamp, timestamp_parse = require "util.datetime".datetime, require "util.datetime".parse;
-local default_max_items, max_max_items = 20, module:get_option_number("max_archive_query_results", 50);
-local global_default_policy = module:get_option("default_archive_policy", true);
-if global_default_policy ~= "roster" then
-	global_default_policy = module:get_option_boolean("default_archive_policy", global_default_policy);
-end
-
-local archive_store = module:get_option_string("archive_store", "archive2");
-local archive = module:open_store(archive_store, "archive");
-
-if archive.name == "null" or not archive.find then
-	-- luacheck: ignore 631
-	if not archive.find then
-		module:log("debug", "Attempt to open archive storage returned a valid driver but it does not seem to implement the storage API");
-		module:log("debug", "mod_%s does not support archiving", archive._provided_by or archive.name and "storage_"..archive.name.."(?)" or "<unknown>");
-	else
-		module:log("debug", "Attempt to open archive storage returned null driver");
-	end
-	module:log("debug", "See https://prosody.im/doc/storage and https://prosody.im/doc/archiving for more information");
-	module:log("info", "Using in-memory fallback archive driver");
-	archive = module:require "fallback_archive";
-end
-
-local use_total = true;
-
-local cleanup;
-
-local function schedule_cleanup(username)
-	if cleanup and not cleanup[username] then
-		table.insert(cleanup, username);
-		cleanup[username] = true;
-	end
-end
-
--- Handle prefs.
-local function handle_prefs(event)
-	local origin, stanza = event.origin, event.stanza;
-	local xmlns_mam = stanza.tags[1].attr.xmlns;
-	local user = origin.username;
-	if stanza.attr.type == "get" then
-		local prefs = prefs_to_stanza(get_prefs(user), xmlns_mam);
-		local reply = st.reply(stanza):add_child(prefs);
-		origin.send(reply);
-	else -- type == "set"
-		local new_prefs = stanza:get_child("prefs", xmlns_mam);
-		local prefs = prefs_from_stanza(new_prefs);
-		local ok, err = set_prefs(user, prefs);
-		if not ok then
-			origin.send(st.error_reply(stanza, "cancel", "internal-server-error", "Error storing preferences: "..tostring(err)));
-		else
-			origin.send(st.reply(stanza));
-		end
-	end
-	return true;
-end
-
-module:hook("iq/self/"..xmlns_mam0..":prefs", handle_prefs);
-module:hook("iq/self/"..xmlns_mam1..":prefs", handle_prefs);
-module:hook("iq/self/"..xmlns_mam2..":prefs", handle_prefs);
-
-local query_form = dataform {
-	{ name = "FORM_TYPE"; type = "hidden"; value = xmlns_mam0; };
-	{ name = "with"; type = "jid-single"; };
-	{ name = "start"; type = "text-single" };
-	{ name = "end"; type = "text-single"; };
-};
-
--- Serve form
-local function handle_get_form(event)
-	local origin, stanza = event.origin, event.stanza;
-	local xmlns_mam = stanza.tags[1].attr.xmlns;
-	query_form[1].value = xmlns_mam;
-	origin.send(st.reply(stanza):query(xmlns_mam):add_child(query_form:form()));
-	return true;
-end
-
-module:hook("iq-get/self/"..xmlns_mam0..":query", handle_get_form);
-module:hook("iq-get/self/"..xmlns_mam1..":query", handle_get_form);
-module:hook("iq-get/self/"..xmlns_mam2..":query", handle_get_form);
-
--- Handle archive queries
-local function handle_mam_query(event)
-	local origin, stanza = event.origin, event.stanza;
-	local xmlns_mam = stanza.tags[1].attr.xmlns;
-	local query = stanza.tags[1];
-	local qid = query.attr.queryid;
-
-	origin.mam_requested = true;
-
-	schedule_cleanup(origin.username);
-
-	-- Search query parameters
-	local qwith, qstart, qend;
-	local form = query:get_child("x", "jabber:x:data");
-	if form then
-		local err;
-		query_form[1].value = xmlns_mam;
-		form, err = query_form:data(form);
-		if err then
-			origin.send(st.error_reply(stanza, "modify", "bad-request", select(2, next(err))));
-			return true;
-		end
-		qwith, qstart, qend = form["with"], form["start"], form["end"];
-		qwith = qwith and jid_bare(qwith); -- dataforms does jidprep
-	end
-
-	if qstart or qend then -- Validate timestamps
-		local vstart, vend = (qstart and timestamp_parse(qstart)), (qend and timestamp_parse(qend));
-		if (qstart and not vstart) or (qend and not vend) then
-			origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid timestamp"))
-			return true;
-		end
-		qstart, qend = vstart, vend;
-	end
-
-	module:log("debug", "Archive query, id %s with %s from %s until %s)",
-		tostring(qid), qwith or "anyone", qstart or "the dawn of time", qend or "now");
-
-	-- RSM stuff
-	local qset = rsm.get(query);
-	local qmax = m_min(qset and qset.max or default_max_items, max_max_items);
-	local reverse = qset and qset.before or false;
-	local before, after = qset and qset.before, qset and qset.after;
-	if type(before) ~= "string" then before = nil; end
-
-	-- Load all the data!
-	local data, err = archive:find(origin.username, {
-		start = qstart; ["end"] = qend; -- Time range
-		with = qwith;
-		limit = qmax + 1;
-		before = before; after = after;
-		reverse = reverse;
-		total = use_total;
-	});
-
-	if not data then
-		origin.send(st.error_reply(stanza, "cancel", "internal-server-error", err));
-		return true;
-	end
-	local total = tonumber(err);
-
-	if xmlns_mam == xmlns_mam0 then
-		origin.send(st.reply(stanza));
-	end
-	local msg_reply_attr = { to = stanza.attr.from, from = stanza.attr.to };
-
-	local results = {};
-
-	-- Wrap it in stuff and deliver
-	local first, last;
-	local count = 0;
-	local complete = "true";
-	for id, item, when in data do
-		count = count + 1;
-		if count > qmax then
-			complete = nil;
-			break;
-		end
-		local fwd_st = st.message(msg_reply_attr)
-			:tag("result", { xmlns = xmlns_mam, queryid = qid, id = id })
-				:tag("forwarded", { xmlns = xmlns_forward })
-					:tag("delay", { xmlns = xmlns_delay, stamp = timestamp(when) }):up();
-
-		if not is_stanza(item) then
-			item = st.deserialize(item);
-		end
-		item.attr.xmlns = "jabber:client";
-		fwd_st:add_child(item);
-
-		if not first then first = id; end
-		last = id;
-
-		if reverse then
-			results[count] = fwd_st;
-		else
-			origin.send(fwd_st);
-		end
-	end
-
-	if reverse then
-		for i = #results, 1, -1 do
-			origin.send(results[i]);
-		end
-		first, last = last, first;
-	end
-
-	-- That's all folks!
-	module:log("debug", "Archive query %s completed", tostring(qid));
-
-	local fin;
-	if xmlns_mam == xmlns_mam0 then
-		fin = st.message(msg_reply_attr);
-	else
-		fin = st.reply(stanza);
-	end
-	do
-		fin:tag("fin", { xmlns = xmlns_mam, queryid = qid, complete = complete })
-			:add_child(rsm.generate {
-				first = first, last = last, count = total })
-	end
-	origin.send(fin);
-	return true;
-end
-module:hook("iq-set/self/"..xmlns_mam0..":query", handle_mam_query);
-module:hook("iq-set/self/"..xmlns_mam1..":query", handle_mam_query);
-module:hook("iq-set/self/"..xmlns_mam2..":query", handle_mam_query);
-
-local function has_in_roster(user, who)
-	local roster = rm_load_roster(user, host);
-	module:log("debug", "%s has %s in roster? %s", user, who, roster[who] and "yes" or "no");
-	return roster[who];
-end
-
-local function shall_store(user, who)
-	-- TODO Cache this?
-	if not um.user_exists(user, host) then
-		return false;
-	end
-	local prefs = get_prefs(user);
-	local rule = prefs[who];
-	module:log("debug", "%s's rule for %s is %s", user, who, tostring(rule));
-	if rule ~= nil then
-		return rule;
-	end
-	-- Below could be done by a metatable
-	local default = prefs[false];
-	module:log("debug", "%s's default rule is %s", user, tostring(default));
-	if default == nil then
-		default = global_default_policy;
-		module:log("debug", "Using global default rule, %s", tostring(default));
-	end
-	if default == "roster" then
-		return has_in_roster(user, who);
-	end
-	return default;
-end
-
--- Handle messages
-local function message_handler(event, c2s)
-	local origin, stanza = event.origin, event.stanza;
-	local log = c2s and origin.log or module._log;
-	local orig_type = stanza.attr.type or "normal";
-	local orig_from = stanza.attr.from;
-	local orig_to = stanza.attr.to or orig_from;
-	-- Stanza without 'to' are treated as if it was to their own bare jid
-
-	-- Whos storage do we put it in?
-	local store_user = c2s and origin.username or jid_split(orig_to);
-	-- And who are they chatting with?
-	local with = jid_bare(c2s and orig_to or orig_from);
-
-	-- Filter out <stanza-id> that claim to be from us
-	if stanza:get_child("stanza-id", xmlns_st_id) then
-		stanza = st.clone(stanza);
-		stanza:maptags(function (tag)
-			if tag.name == "stanza-id" and tag.attr.xmlns == xmlns_st_id then
-				local by_user, by_host, res = jid_prepped_split(tag.attr.by);
-				if not res and by_host == module.host and by_user == store_user then
-					return nil;
-				end
-			end
-			return tag;
-		end);
-		event.stanza = stanza;
-	end
-
-	-- We store chat messages or normal messages that have a body
-	if not(orig_type == "chat" or (orig_type == "normal" and stanza:get_child("body")) ) then
-		log("debug", "Not archiving stanza: %s (type)", stanza:top_tag());
-		return;
-	end
-
-	-- or if hints suggest we shouldn't
-	if not stanza:get_child("store", "urn:xmpp:hints") then -- No hint telling us we should store
-		if stanza:get_child("no-permanent-store", "urn:xmpp:hints")
-			or stanza:get_child("no-store", "urn:xmpp:hints") then -- Hint telling us we should NOT store
-			log("debug", "Not archiving stanza: %s (hint)", stanza:top_tag());
-			return;
-		end
-	end
-
-	-- Check with the users preferences
-	if shall_store(store_user, with) then
-		log("debug", "Archiving stanza: %s", stanza:top_tag());
-
-		-- And stash it
-		local ok = archive:append(store_user, nil, stanza, time_now(), with);
-		if ok then
-			local clone_for_other_handlers = st.clone(stanza);
-			local id = ok;
-			clone_for_other_handlers:tag("stanza-id", { xmlns = xmlns_st_id, by = store_user.."@"..host, id = id }):up();
-			event.stanza = clone_for_other_handlers;
-			schedule_cleanup(store_user);
-			module:fire_event("archive-message-added", { origin = origin, stanza = stanza, for_user = store_user, id = id });
-		end
-	else
-		log("debug", "Not archiving stanza: %s (prefs)", stanza:top_tag());
-	end
-end
-
-local function c2s_message_handler(event)
-	return message_handler(event, true);
-end
-
-local function strip_stanza_id(event)
-	local strip_by = jid_bare(event.origin.full_jid);
-	event.stanza = st.clone(event.stanza);
-	event.stanza:maptags(function(tag)
-		if not ( tag.attr.xmlns == xmlns_st_id and tag.attr.by == strip_by ) then
-			return tag;
-		end
-	end);
-end
-
-module:hook("pre-message/bare", strip_stanza_id, 0.01);
-module:hook("pre-message/full", strip_stanza_id, 0.01);
-
-local cleanup_after = module:get_option_string("archive_expires_after", "1w");
-local cleanup_interval = module:get_option_number("archive_cleanup_interval", 4 * 60 * 60);
-if cleanup_after ~= "never" then
-	local day = 86400;
-	local multipliers = { d = day, w = day * 7, m = 31 * day, y = 365.2425 * day };
-	local n, m = cleanup_after:lower():match("(%d+)%s*([dwmy]?)");
-	if not n then
-		module:log("error", "Could not parse archive_expires_after string %q", cleanup_after);
-		return false;
-	end
-
-	cleanup_after = tonumber(n) * ( multipliers[m] or 1 );
-
-	module:log("debug", "archive_expires_after = %d -- in seconds", cleanup_after);
-
-	if not archive.delete then
-		module:log("error", "archive_expires_after set but mod_%s does not support deleting", archive._provided_by);
-		return false;
-	end
-
-	-- Set of known users to do message expiry for
-	-- Populated either below or when new messages are added
-	cleanup = {};
-
-	-- Iterating over users is not supported by all authentication modules
-	-- Catch and ignore error if not supported
-	pcall(function ()
-		-- If this works, then we schedule cleanup for all known users on startup
-		for user in um.users(module.host) do
-			schedule_cleanup(user);
-		end
-	end);
-
-	-- At odd intervals, delete old messages for one user
-	module:add_timer(math.random(10, 60), function()
-		local user = table.remove(cleanup, 1);
-		if user then
-			module:log("debug", "Removing old messages for user %q", user);
-			local ok, err = archive:delete(user, { ["end"] = os.time() - cleanup_after; })
-			if not ok then
-				module:log("warn", "Could not expire archives for user %s: %s", user, err);
-			else
-				-- :affected() is a recent addition for eg SQLite3 in LuaDBI
-				pcall(function(stmt)
-					module:log("debug", "Removed %d messages", stmt:affected());
-				end, err);
-			end
-			cleanup[user] = nil;
-		end
-		return math.random(cleanup_interval, cleanup_interval * 2);
-	end);
-else
-	-- Don't ask the backend to count the potentially unbounded number of items,
-	-- it'll get slow.
-	use_total = false;
-end
-
--- Stanzas sent by local clients
-local priority = 0.075
-assert(priority < 0.1, "priority must be after mod_firewall");
-assert(priority > 0.05, "priority must be before mod_carbons");
-assert(priority > 0.01, "priority must be before strip_stanza_id");
-module:hook("pre-message/bare", c2s_message_handler, priority);
-module:hook("pre-message/full", c2s_message_handler, priority);
--- Stanszas to local clients
-priority = 0.075
-assert(priority > 0, "priority must be before mod_message");
-assert(priority < 0.1, "priority must be after mod_firewall");
-assert(priority > 0.05, "priority must be before mod_carbons");
-module:hook("message/bare", message_handler, priority);
-module:hook("message/full", message_handler, priority);
-
-module:add_feature(xmlns_mam0); -- COMPAT with XEP-0313 v 0.1
-
-module:hook("account-disco-info", function(event)
-	(event.reply or event.stanza):tag("feature", {var=xmlns_mam0}):up();
-	(event.reply or event.stanza):tag("feature", {var=xmlns_mam1}):up();
-	(event.reply or event.stanza):tag("feature", {var=xmlns_mam2}):up();
-	(event.reply or event.stanza):tag("feature", {var=xmlns_st_id}):up();
-end);
-
diff -r b935276ab1b4 -r 6ca1117b81a5 mod_mam/rsm.lib.lua
--- a/mod_mam/rsm.lib.lua	Fri Jul 09 20:54:40 2021 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,87 +0,0 @@
-local stanza = require"util.stanza".stanza;
-local tostring, tonumber = tostring, tonumber;
-local type = type;
-local pairs = pairs;
-
-local xmlns_rsm = 'http://jabber.org/protocol/rsm';
-
-local element_parsers = {};
-
-do
-	local parsers = element_parsers;
-	local function xs_int(st)
-		return tonumber((st:get_text()));
-	end
-	local function xs_string(st)
-		return st:get_text();
-	end
-
-	parsers.after = xs_string;
-	parsers.before = function(st)
-			local text = st:get_text();
-			return text == "" or text;
-		end;
-	parsers.max = xs_int;
-	parsers.index = xs_int;
-
-	parsers.first = function(st)
-			return { index = tonumber(st.attr.index); st:get_text() };
-		end;
-	parsers.last = xs_string;
-	parsers.count = xs_int;
-end
-
-local element_generators = setmetatable({
-	first = function(st, data)
-		if type(data) == "table" then
-			st:tag("first", { index = data.index }):text(data[1]):up();
-		else
-			st:tag("first"):text(tostring(data)):up();
-		end
-	end;
-	before = function(st, data)
-		if data == true then
-			st:tag("before"):up();
-		else
-			st:tag("before"):text(tostring(data)):up();
-		end
-	end
-}, {
-	__index = function(_, name)
-		return function(st, data)
-			st:tag(name):text(tostring(data)):up();
-		end
-	end;
-});
-
-
-local function parse(set)
-	local rs = {};
-	for tag in set:childtags() do
-		local name = tag.name;
-		local parser = name and element_parsers[name];
-		if parser then
-			rs[name] = parser(tag);
-		end
-	end
-	return rs;
-end
-
-local function generate(t)
-	local st = stanza("set", { xmlns = xmlns_rsm });
-	for k,v in pairs(t) do
-		if element_parsers[k] then
-			element_generators[k](st, v);
-		end
-	end
-	return st;
-end
-
-local function get(st)
-	local set = st:get_child("set", xmlns_rsm);
-	if set and #set.tags > 0 then
-		return parse(set);
-	end
-end
-
-return { parse = parse, generate = generate, get = get };