File

+
−
+
−local jid_bare = require "util.jid".bare;
+
−local os_time = os.time;
+
−local t_concat = table.concat;
+
−
+
−prosody.unlock_globals(); -- LuaSocket wants to pollute the global scope
+
−local smtp = require "socket.smtp";
+
−prosody.lock_globals();
+
−
+
−local smtp_server = module:get_option_string("smtp_server", "localhost");
+
−local smtp_user = module:get_option_string("smtp_username");
+
−local smtp_pass = module:get_option_string("smtp_password");
+
−
+
−local smtp_address = module:get_option("smtp_from") or ((smtp_user or "xmpp").."@"..(smtp_server or module.host));
+
−
+
−local queue_offline_emails = module:get_option("queue_offline_emails");
+
−if queue_offline_emails == true then queue_offline_emails = 300; end
+
−
+
−local send_message_as_email;
+
−
+
−module:hook("message/offline/handle", function(event)
+
−	local stanza = event.stanza;
+
−	local text = stanza:get_child_text("body");
+
−	if text then
+
−		return send_message_as_email(jid_bare(stanza.attr.to), jid_bare(stanza.attr.from), text);
+
−	end
+
−end, 1);
+
−
+
−function send_message_as_email(address, from_address, message_text, subject)
+
−	module:log("info", "Forwarding offline message to %s via email", address);
+
−	local rcpt = "<"..address..">";
+
−
+
−	local mesgt = {
+
−		headers = {
+
−			["content-type"] = 'text/plain; charset=utf-8';
+
−			to = address;
+
−			subject = subject or ("Offline message from "..jid_bare(from_address));
+
−		};
+
−		body = message_text;
+
−	};
+
−
+
−	local ok, err = smtp.send{ from = smtp_address, rcpt = rcpt, source = smtp.message(mesgt),
+
−		server = smtp_server, user = smtp_user, password = smtp_pass };
+
−
+
−	if not ok then
+
−		module:log("error", "Failed to deliver to %s: %s", tostring(address), tostring(err));
+
−		return;
+
−	end
+
−	return true;
+
−end
+
−
+
−if queue_offline_emails then
+
−	local queues = {};
+
−	local real_send_message_as_email = send_message_as_email;
+
−	function send_message_as_email(address, from_address, message_text)
+
−		local pair_key = address.."\0"..from_address;
+
−		local queue = queues[pair_key];
+
−		if not queue then
+
−			queue = { from = smtp_address, to = address, messages = {} };
+
−			queues[pair_key] = queue;
+
−
+
−			module:add_timer(queue_offline_emails+5, function ()
+
−				module:log("info", "Checking on %s", from_address);
+
−				local current_time = os_time();
+
−				local diff = current_time - queue.last_message_time;
+
−				if diff > queue_offline_emails then
+
−					module:log("info", "Enough silence, sending...");
+
−					real_send_message_as_email(address, from_address, t_concat(queue.messages, "\n"), "You have "..#queue.messages.." offline message"..(#queue.messages == 1 and "" or "s").." from "..from_address)
+
−				else
+
−					module:log("info", "Next check in %d", queue_offline_emails - diff + 5);
+
−					return queue_offline_emails - diff + 5;
+
−				end
+
−			end);
+
−		end
+
−
+
−		queue.last_message_time = os_time();
+
−
+
−		local messages = queue.messages;
+
−		messages[#messages+1] = message_text;
+
−		return true;
+
−	end
+
−end