Limits subscription requests to admins

mod_limit_subscription.lua

-- mod_limit_subscription
-- Limits subscription requests to admins

local st = require "util.stanza";
local is_admin = usermanager.is_admin;

function subscription_handler(event)
	local origin, stanza = event.origin, event.stanza;
	
	if stanza.attr.type == "subscribe" and not is_admin(origin.full_jid, module.host) then
		origin.send(st.error_reply(stanza, "cancel", "not-authorized"));
		return true;
	end
end

module:hook("pre-presence/bare", subscription_handler, 100);
module:hook("pre-presence/full", subscription_handler, 100);
module:hook("pre-presence/host", subscription_handler, 100);