func sd_record_kick(bot *bot.Sp0rkle, line *base.Line) {
	sd := bot.GetDriver(driverName).(*seenDriver)
	n, c := line.Storable()
	kn := db.StorableNick{Nick: line.Args[1]}
	// SeenNickFromLine doesn't work with the hacks for KICKING and KICKED
	// First, handle KICKING
	kr := sd.LastSeenDoing(line.Nick, "KICKING")
	if kr == nil {
		kr = seen.SawNick(n, c, "KICKING", line.Args[2])
	} else {
		kr.StorableNick, kr.StorableChan = n, c
		kr.Timestamp, kr.Text = time.Now(), line.Args[2]
	}
	kr.OtherNick = kn
	_, err := sd.Upsert(kr.Index(), kr)
	if err != nil {
		bot.Reply(line, "Failed to store seen data: %v", err)
	}
	// Now, handle KICKED
	ke := sd.LastSeenDoing(line.Args[1], "KICKED")
	if ke == nil {
		ke = seen.SawNick(kn, c, "KICKED", line.Args[2])
	} else {
		ke.StorableNick, ke.StorableChan = kn, c
		ke.Timestamp, ke.Text = time.Now(), line.Args[2]
	}
	ke.OtherNick = n
	_, err = sd.Upsert(ke.Index(), ke)
	if err != nil {
		bot.Reply(line, "Failed to store seen data: %v", err)
	}
}

func cd_netmask(bot *bot.Sp0rkle, line *base.Line, ips, nms string) {
	ip := net.ParseIP(ips)
	nmip := net.ParseIP(nms)
	if ip == nil || nmip == nil {
		bot.ReplyN(line, "either %s or %s couldn't be parsed as an IP", ips, nms)
		return
	}
	// this is a bit of a hack, because using ParseIP to parse
	// something that's actually a v4 netmask doesn't quite work
	nm := net.IPMask(nmip.To4())
	cidr, bits := nm.Size()
	if ip.To4() != nil && nm != nil {
		if bits != 32 {
			bot.ReplyN(line, "%s doesn't look like a valid IPv4 netmask", nms)
			return
		}
	} else {
		// IPv6, hopefully
		nm = net.IPMask(nmip)
		cidr, bits = nm.Size()
		if bits != 128 {
			bot.ReplyN(line, "%s doesn't look like a valid IPv6 netmask", nms)
			return
		}
	}
	btm, top := cd_netmask_range(ip, nm)
	bot.ReplyN(line, "%s/%d is in the range %s-%s and has the netmask %s",
		ip, cidr, btm, top, nmip)
}

func cd_calc(bot *bot.Sp0rkle, line *base.Line, maths string) {
	if num, err := calc.Calc(maths); err == nil {
		bot.ReplyN(line, "%s = %g", maths, num)
	} else {
		bot.ReplyN(line, "%s error while parsing %s", err, maths)
	}
}

func ud_scan(bot *bot.Sp0rkle, ud *urlDriver, line *base.Line) {
	words := strings.Split(line.Args[1], " ")
	n, c := line.Storable()
	for _, w := range words {
		if util.LooksURLish(w) {
			if u := ud.GetByUrl(w); u != nil {
				bot.Reply(line, "%s first mentioned by %s at %s",
					w, u.Nick, u.Timestamp.Format(time.RFC1123))
				continue
			}
			u := urls.NewUrl(w, n, c)
			if len(w) > autoShortenLimit {
				u.Shortened = ud.Encode(w)
			}
			if err := ud.Insert(u); err != nil {
				bot.ReplyN(line, "Couldn't insert url '%s': %s", w, err)
				continue
			}
			if u.Shortened != "" {
				bot.Reply(line, "%s's URL shortened as %s%s%s",
					line.Nick, bot.Prefix, shortenPath, u.Shortened)
			}
			ud.lastseen[line.Args[0]] = u.Id
		}
	}
}

func fd_literal(bot *bot.Sp0rkle, fd *factoidDriver, line *base.Line) {
	key := ToKey(line.Args[1], false)
	if count := fd.GetCount(key); count == 0 {
		bot.ReplyN(line, "I don't know anything about '%s'.", key)
		return
	} else if count > 10 && strings.HasPrefix(line.Args[0], "#") {
		bot.ReplyN(line, "I know too much about '%s', ask me privately.", key)
		return
	}

	// Temporarily turn off flood protection cos we could be spamming a bit.
	bot.Conn.Flood = true
	defer func() { bot.Conn.Flood = false }()
	// Passing an anonymous function to For makes it a little hard to abstract
	// away in lib/factoids. Fortunately this is something of a one-off.
	var fact *factoids.Factoid
	f := func() error {
		if fact != nil {
			bot.ReplyN(line, "[%3.0f%%] %s", fact.Chance*100, fact.Value)
		}
		return nil
	}
	if err := fd.Find(bson.M{"key": key}).For(&fact, f); err != nil {
		bot.ReplyN(line, "Something literally went wrong: %s", err)
	}
}

func cd_ord(bot *bot.Sp0rkle, line *base.Line, ord string) {
	r, _ := utf8.DecodeRuneInString(ord)
	if r == utf8.RuneError {
		bot.ReplyN(line, "Couldn't parse a utf8 rune from %s", ord)
		return
	}
	bot.ReplyN(line, "ord(%c) is %d, %U, '%s'", r, r, r, cd_utf8repr(r))
}

func cd_netmask_cidr(bot *bot.Sp0rkle, line *base.Line, cidr string) {
	if _, nm, err := net.ParseCIDR(cidr); err == nil {
		btm, top := cd_netmask_range(nm.IP, nm.Mask)
		bot.ReplyN(line, "%s is in the range %s-%s and has the netmask %s",
			cidr, btm, top, net.IP(nm.Mask))
	} else {
		bot.ReplyN(line, "error parsing ip/cidr %s: %s", cidr, err)
	}
}

func cd_chr(bot *bot.Sp0rkle, line *base.Line, chr string) {
	// handles decimal, hex, and octal \o/
	i, err := strconv.ParseInt(chr, 0, 0)
	if err != nil {
		bot.ReplyN(line, "Couldn't parse %s as an integer: %s", chr, err)
		return
	}
	bot.ReplyN(line, "chr(%s) is %c, %U, '%s'", chr, i, i, cd_utf8repr(rune(i)))
}

func sd_record_pm(bot *bot.Sp0rkle, line *base.Line) {
	sd := bot.GetDriver(driverName).(*seenDriver)
	sn := sd.SeenNickFromLine(line)
	sn.Text = line.Args[1]
	_, err := sd.Upsert(sn.Index(), sn)
	if err != nil {
		bot.Reply(line, "Failed to store seen data: %v", err)
	}
}

func qd_add(bot *bot.Sp0rkle, qd *quoteDriver, line *base.Line) {
	n, c := line.Storable()
	quote := quotes.NewQuote(line.Args[1], n, c)
	quote.QID = qd.NewQID()
	if err := qd.Insert(quote); err == nil {
		bot.ReplyN(line, "Quote added succesfully, id #%d.", quote.QID)
	} else {
		bot.ReplyN(line, "Error adding quote: %s.", err)
	}
}

func nd_privmsg(bot *bot.Sp0rkle, line *base.Line) {
	nd := bot.GetDriver(driverName).(*netDriver)

	idx := strings.Index(line.Args[1], " ")
	if !line.Addressed || idx == -1 {
		return
	}
	svc, query := line.Args[1][:idx], line.Args[1][idx+1:]
	if s, ok := nd.services[svc]; ok {
		bot.ReplyN(line, "%s", s.LookupResult(query))
	}
}

func sd_record_chan(bot *bot.Sp0rkle, line *base.Line) {
	sd := bot.GetDriver(driverName).(*seenDriver)
	sn := sd.SeenNickFromLine(line)
	if len(line.Args) > 1 {
		// If we have a PART message
		sn.Text = line.Args[1]
	}
	_, err := sd.Upsert(sn.Index(), sn)
	if err != nil {
		bot.Reply(line, "Failed to store seen data: %v", err)
	}
}

func dd_privmsg(bot *bot.Sp0rkle, line *base.Line) {
	if !line.Addressed {
		return
	}

	switch {
	case strings.HasPrefix(line.Args[1], "decide "):
		opts := splitDelimitedString(line.Args[1][7:])
		chosen := strings.TrimSpace(opts[util.RNG.Intn(len(opts))])
		bot.ReplyN(line, "%s", chosen)
	case strings.HasPrefix(line.Args[1], "rand "):
		bot.ReplyN(line, "%s", randomFloatAsString(line.Args[1][5:], util.RNG))
	}
}

func fd_delete(bot *bot.Sp0rkle, fd *factoidDriver, line *base.Line) {
	// Get fresh state on the last seen factoid.
	ls := fd.Lastseen(line.Args[0], "")
	if fact := fd.GetById(ls); fact != nil {
		if err := fd.Remove(bson.M{"_id": ls}); err == nil {
			bot.ReplyN(line, "I forgot that '%s' was '%s'.",
				fact.Key, fact.Value)
		} else {
			bot.ReplyN(line, "I failed to forget '%s': %s", fact.Key, err)
		}
	} else {
		bot.ReplyN(line, "Whatever that was, I've already forgotten it.")
	}
}

func cd_privmsg(bot *bot.Sp0rkle, line *base.Line) {
	if !line.Addressed {
		return
	}

	switch {
	case strings.HasPrefix(line.Args[1], "calc "):
		cd_calc(bot, line, line.Args[1][5:])
	case strings.HasPrefix(line.Args[1], "netmask "):
		s := strings.Split(line.Args[1], " ")
		if strings.Index(s[1], "/") != -1 {
			// Assume we have netmask ip/cidr
			cd_netmask_cidr(bot, line, s[1])
		} else if len(s) == 3 {
			// Assume we have netmask ip nm
			cd_netmask(bot, line, s[1], s[2])
		}
	case strings.HasPrefix(line.Args[1], "chr "):
		cd_chr(bot, line, line.Args[1][4:])
	case strings.HasPrefix(line.Args[1], "ord "):
		cd_ord(bot, line, line.Args[1][4:])
	case strings.HasPrefix(line.Args[1], "length "):
		bot.ReplyN(line, "'%s' is %d characters long",
			line.Args[1][7:], len(line.Args[1][7:]))
	case strings.HasPrefix(line.Args[1], "base "):
		s := strings.Split(line.Args[1], " ")
		cd_base(bot, line, s[1], s[2])
	}
}

func ud_privmsg(bot *bot.Sp0rkle, line *base.Line) {
	ud := bot.GetDriver(driverName).(*urlDriver)

	// If we're not being addressed directly, short-circuit to scan.
	if !line.Addressed {
		ud_scan(bot, ud, line)
		return
	}

	nl := line.Copy()
	switch {
	case util.StripAnyPrefix(&nl.Args[1],
		[]string{"url find ", "urlfind ", "url search ", "urlsearch "}):
		ud_find(bot, ud, nl)
	case util.HasAnyPrefix(nl.Args[1], []string{"random url", "randurl"}):
		nl.Args[1] = ""
		ud_find(bot, ud, nl)
	case util.StripAnyPrefix(&nl.Args[1],
		[]string{"shorten that", "shorten"}):
		ud_shorten(bot, ud, nl)
	case util.StripAnyPrefix(&nl.Args[1],
		[]string{"cache that", "save that", "cache ", "save "}):
		ud_cache(bot, ud, nl)
	default:
		ud_scan(bot, ud, line)
	}
}

func qd_delete(bot *bot.Sp0rkle, qd *quoteDriver, line *base.Line) {
	qid, err := strconv.Atoi(line.Args[1])
	if err != nil {
		bot.ReplyN(line, "'%s' doesn't look like a quote id.", line.Args[1])
		return
	}
	if quote := qd.GetByQID(qid); quote != nil {
		if err := qd.Remove(bson.M{"_id": quote.Id}); err == nil {
			bot.ReplyN(line, "I forgot quote #%d: %s", qid, quote.Quote)
		} else {
			bot.ReplyN(line, "I failed to forget quote #%d: %s", qid, err)
		}
	} else {
		bot.ReplyN(line, "No quote found for id %d", qid)
	}
}

func qd_fetch(bot *bot.Sp0rkle, qd *quoteDriver, line *base.Line) {
	if qd.rateLimit(line.Nick) {
		return
	}
	qid, err := strconv.Atoi(line.Args[1])
	if err != nil {
		bot.ReplyN(line, "'%s' doesn't look like a quote id.", line.Args[1])
		return
	}
	quote := qd.GetByQID(qid)
	if quote != nil {
		bot.Reply(line, "#%d: %s", quote.QID, quote.Quote)
	} else {
		bot.ReplyN(line, "No quote found for id %d", qid)
	}
}

func qd_privmsg(bot *bot.Sp0rkle, line *base.Line) {
	qd := bot.GetDriver(driverName).(*quoteDriver)

	if !line.Addressed {
		return
	}

	nl := line.Copy()
	switch {
	// Quote add: qadd | quote add | add quote
	case util.StripAnyPrefix(&nl.Args[1], []string{"quote add ", "qadd ", "add quote "}):
		qd_add(bot, qd, nl)
	// Quote delete: qdel | quote del | del quote  #?QID
	case util.StripAnyPrefix(&nl.Args[1], []string{"quote del ", "qdel ", "del quote "}):
		// Strip optional # before qid
		if nl.Args[1][0] == '#' {
			nl.Args[1] = nl.Args[1][1:]
		}
		qd_delete(bot, qd, nl)
	// Quote lookup: quote #QID
	case util.StripAnyPrefix(&nl.Args[1], []string{"quote #"}):
		qd_fetch(bot, qd, nl)
	// Quote lookup: quote | quote regex
	case strings.ToLower(nl.Args[1]) == "quote":
		nl.Args[1] = ""
		fallthrough
	// This needs to come after the other cases as it will strip just "quote "
	case util.StripAnyPrefix(&nl.Args[1], []string{"quote "}):
		qd_lookup(bot, qd, nl)
	}
}

func qd_lookup(bot *bot.Sp0rkle, qd *quoteDriver, line *base.Line) {
	if qd.rateLimit(line.Nick) {
		return
	}
	quote := qd.GetPseudoRand(line.Args[1])
	if quote == nil {
		bot.ReplyN(line, "No quotes matching '%s' found.", line.Args[1])
		return
	}

	// TODO(fluffle): qd should take care of updating Accessed internally
	quote.Accessed++
	if err := qd.Update(bson.M{"_id": quote.Id}, quote); err != nil {
		bot.ReplyN(line, "I failed to update quote #%d: %s", quote.QID, err)
	}
	bot.Reply(line, "#%d: %s", quote.QID, quote.Quote)
}