offlinemsg.cpp

/*
 * offlinemsg - Automatic Offline Message Delivery for Anope 2.0
 *
 * When a user identifies with NickServ, this module checks for
 * memos and delivers them as PRIVMSGs that appear to come from the
 * original sender via MSGAS. Memos are deleted after delivery.
 *
 * Designed to work with the m_offlinemsg UnrealIRCd module which
 * intercepts PRIVMSGs to offline users and creates memos automatically.
 *
 * Requires the MSGAS command (from m_cnotice) to be available on the
 * IRCd with CMD_USER flag for ULine clients.
 *
 * Copyright 2026 The Fuel Rats Mischief
 * Author: Alex Sørlie
 */

#include "module.h"

class OfflineMsg : public Module
{
	static Anope::string FormatTime(time_t t)
	{
		char buf[64];
		struct tm *tm = gmtime(&t);
		snprintf(buf, sizeof(buf), "%04d-%02d-%02dT%02d:%02d:%02d.000Z",
			tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
			tm->tm_hour, tm->tm_min, tm->tm_sec);
		return buf;
	}

public:
	OfflineMsg(const Anope::string &modname, const Anope::string &creator)
		: Module(modname, creator, THIRD)
	{
	}

	void OnUserLogin(User *u) anope_override
	{
		const NickCore *nc = u->Account();
		if (!nc)
			return;

		MemoInfo *mi = const_cast<MemoInfo *>(&nc->memos);
		if (!mi || mi->memos->empty())
			return;

		BotInfo *nickserv = BotInfo::Find("NickServ", true);
		if (!nickserv)
			return;

		unsigned delivered = 0;
		/* Iterate backwards since we're deleting */
		for (int i = mi->memos->size() - 1; i >= 0; --i)
		{
			Memo *m = mi->GetMemo(i);

			/* Send via MSGAS with ISO 8601 timestamp */
			Anope::string timestamp = FormatTime(m->time);
			UplinkSocket::Message(nickserv) << "MSGAS " << m->sender
				<< " " << u->nick << " " << timestamp << " :" << m->text;

			FOREACH_MOD(OnMemoDel, (nc->display, mi, m));
			mi->Del(i);
			++delivered;
		}

		if (delivered > 0)
		{
			u->SendMessage(nickserv,
				"%d offline message%s delivered.",
				delivered, delivered == 1 ? "" : "s");
		}
	}
};

MODULE_INIT(OfflineMsg)