fix #1205

irc/handlers.go

@@ -3131,7 +3131,12 @@ func whowasHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Re
 
 // ZNC <module> [params]
 func zncHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
-	zncModuleHandler(client, msg.Params[0], msg.Params[1:], rb)
+	params := msg.Params[1:]
+	// #1205: compatibility with Palaver, which sends `ZNC *playback :play ...`
+	if len(params) == 1 && strings.IndexByte(params[0], ' ') != -1 {
+		params = strings.Fields(params[0])
+	}
+	zncModuleHandler(client, msg.Params[0], params, rb)
 	return false
 }
 

irc/history/queries.go

@@ -7,8 +7,7 @@ import (
 	"time"
 )
 
-// Selector represents a parameter to a CHATHISTORY command;
+// Selector represents a parameter to a CHATHISTORY command
-// at most one of Msgid or Time may be nonzero
 type Selector struct {
 	Msgid string
 	Time  time.Time

irc/znc.go

@@ -53,6 +53,12 @@ func zncWireTimeToTime(str string) (result time.Time) {
 	return time.Unix(seconds, int64(fraction*1000000000)).UTC()
 }
 
+func timeToZncWireTime(t time.Time) (result string) {
+	secs := t.Unix()
+	nano := t.UnixNano() - (secs * 1000000000)
+	return fmt.Sprintf("%d.%d", secs, nano)
+}
+
 type zncPlaybackTimes struct {
 	start   time.Time
 	end     time.Time
@@ -77,13 +83,25 @@ func (z *zncPlaybackTimes) ValidFor(target string) bool {
 }
 
 // https://wiki.znc.in/Playback
+func zncPlaybackHandler(client *Client, command string, params []string, rb *ResponseBuffer) {
+	if len(params) == 0 {
+		return
+	}
+	switch strings.ToLower(params[0]) {
+	case "play":
+		zncPlaybackPlayHandler(client, command, params, rb)
+	case "list":
+		zncPlaybackListHandler(client, command, params, rb)
+	default:
+		return
+	}
+}
+
 // PRIVMSG *playback :play <target> [lower_bound] [upper_bound]
 // e.g., PRIVMSG *playback :play * 1558374442
-func zncPlaybackHandler(client *Client, command string, params []string, rb *ResponseBuffer) {
+func zncPlaybackPlayHandler(client *Client, command string, params []string, rb *ResponseBuffer) {
 	if len(params) < 2 || len(params) > 4 {
 		return
-	} else if strings.ToLower(params[0]) != "play" {
-		return
 	}
 	targetString := params[1]
 
@@ -123,6 +141,9 @@ func zncPlaybackHandler(client *Client, command string, params []string, rb *Res
 
 	if params[1] == "*" {
 		zncPlayPrivmsgs(client, rb, "*", start, end)
+	} else if params[1] == "*self" {
+		zncPlayPrivmsgs(client, rb, "*", start, end)
+		targets = make(StringSet) // XXX non-nil but empty channel set means "no channels"
 	} else {
 		targets = make(StringSet)
 		for _, targetName := range strings.Split(targetString, ",") {
@@ -169,3 +190,22 @@ func zncPlayPrivmsgs(client *Client, rb *ResponseBuffer, target string, after, b
 		client.replayPrivmsgHistory(rb, items, "", true)
 	}
 }
+
+// PRIVMSG *playback :list
+func zncPlaybackListHandler(client *Client, command string, params []string, rb *ResponseBuffer) {
+	nick := client.Nick()
+	for _, channel := range client.Channels() {
+		_, sequence, err := client.server.GetHistorySequence(channel, client, "")
+		if err != nil {
+			client.server.logger.Error("internal", "couldn't get history sequence for ZNC list", err.Error())
+			continue
+		}
+		items, _, err := sequence.Between(history.Selector{}, history.Selector{}, 1) // i.e., LATEST * 1
+		if err != nil {
+			client.server.logger.Error("internal", "couldn't query history for ZNC list", err.Error())
+		} else if len(items) != 0 {
+			stamp := timeToZncWireTime(items[0].Message.Time)
+			rb.Add(nil, "*playback!znc@znc.in", "PRIVMSG", nick, fmt.Sprintf("%s 0 %s", channel.Name(), stamp))
+		}
+	}
+}