Retrieve Chat Messages from Players with GSC

[Drag]

Is there currently anyway to retrieve chat messages from players using GSC? I had previously done this using Lua with

player::onnotify("say", function ....

but I am currently unable to find a way to port this to GSC without any sort of extra plugin.

The idea is to take the message and execute some sort of command, much like the commands you often see in Minecraft (/kill player, /help, etc...). I had it working previously in Lua with a multitude of commands, so if somebody could help me port it to GSC, that would be awesome. Or if I could do it in another language, I am open to that as well.

Thank you!

[mxve]

init() {
    level thread chatListener();
}

chatListener() {
    while (true) {
        level waittill("say", message, player);
        println(player.name + " said: " + message);
    }
}