togglestream.js

var user = message.getUser();
var streaming = guild.getRole("421037817188188161");

var streamers = storage.get("streamers");
if (streamers == "null")
    streamers = [];
else
    streamers = JSON.parse(streamers);

var index = -1;
for (var i = 0; i < streamers.length; i++)
    if (streamers[i] == user.getID())
        index = i;

if (index == -1) {
    if (!manager.addRole(user, streaming)) {
        channel.message("Unable to add streaming role");
        return;
    }
    streamers.push(user.getID());
    channel.message("Added streaming role");
} else {
    if (!manager.removeRole(user, streaming)) {
        channel.message("Unable to remove streaming role");
        return;
    }
    streamers.splice(index, 1);
    channel.message("Removed streaming role");
}
storage.set("streamers", JSON.stringify(streamers));