prosody-modules
2b10e51d85a6
mod_offline_email/mod_offline_email.lua

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mod_offline_email/mod_offline_email.lua @ 3965:2b10e51d85a6

mod_muc_limits: Add config option to limit to join stanzas only This is a bit more limited in pre-0.11 MUC modules, because it just detects stanzas sent to full JIDs (which would include all presence and nick changes). This option is useful for setups where users are typically unaffiliated, but trusted (e.g. if access to the room is gated through some other means such as password/token auth).
author Matthew Wild <mwild1@gmail.com>
date Fri, 03 Apr 2020 12:26:56 +0100
parent 3405:bd71c97de1d0
child 4231:ee724c7fa8e0
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2 local jid_bare = require "util.jid".bare;
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3 local os_time = os.time;
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4 local t_concat = table.concat;
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6 prosody.unlock_globals(); -- LuaSocket wants to pollute the global scope
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7 local smtp = require "socket.smtp";
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8 prosody.lock_globals();
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10 local smtp_server = module:get_option_string("smtp_server", "localhost");
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11 local smtp_user = module:get_option_string("smtp_username");
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12 local smtp_pass = module:get_option_string("smtp_password");
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14 local smtp_address = module:get_option("smtp_from") or ((smtp_user or "xmpp").."@"..(smtp_server or module.host));
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16 local queue_offline_emails = module:get_option("queue_offline_emails");
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17 if queue_offline_emails == true then queue_offline_emails = 300; end
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19 local send_message_as_email;
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21 module:hook("message/offline/handle", function(event)
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22 local stanza = event.stanza;
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23 local text = stanza:get_child_text("body");
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24 if text then
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25 return send_message_as_email(jid_bare(stanza.attr.to), jid_bare(stanza.attr.from), text);
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26 end
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27 end, 1);
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29 function send_message_as_email(address, from_address, message_text, subject)
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30 module:log("info", "Forwarding offline message to %s via email", address);
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31 local rcpt = "<"..address..">";
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33 local mesgt = {
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34 headers = {
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35 to = address;
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36 subject = subject or ("Offline message from "..jid_bare(from_address));
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37 };
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38 body = message_text;
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39 };
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41 local ok, err = smtp.send{ from = smtp_address, rcpt = rcpt, source = smtp.message(mesgt),
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42 server = smtp_server, user = smtp_user, password = smtp_pass };
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44 if not ok then
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45 module:log("error", "Failed to deliver to %s: %s", tostring(address), tostring(err));
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46 return;
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47 end
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48 return true;
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49 end
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51 if queue_offline_emails then
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52 local queues = {};
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53 local real_send_message_as_email = send_message_as_email;
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54 function send_message_as_email(address, from_address, message_text)
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55 local pair_key = address.."\0"..from_address;
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56 local queue = queues[pair_key];
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57 if not queue then
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58 queue = { from = smtp_address, to = address, messages = {} };
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59 queues[pair_key] = queue;
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61 module:add_timer(queue_offline_emails+5, function ()
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62 module:log("info", "Checking on %s", from_address);
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63 local current_time = os_time();
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64 local diff = current_time - queue.last_message_time;
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65 if diff > queue_offline_emails then
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66 module:log("info", "Enough silence, sending...");
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67 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)
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68 else
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69 module:log("info", "Next check in %d", queue_offline_emails - diff + 5);
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70 return queue_offline_emails - diff + 5;
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71 end
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72 end);
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73 end
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75 queue.last_message_time = os_time();
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76
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77 local messages = queue.messages;
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78 messages[#messages+1] = message_text;
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79 return true;
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80 end
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81 end