static class SlackMsg {

  S user, botName; // one of these is going to be set

  S userName; // looked up if user != null

  S type, text, ts;

  O reactions;

  S channelID;

}

static L<SlackMsg> slackSlurp(S channelID, S token, int limit, S oldest, S latest, boolean inclusive) {

  S url = "https://slack.com/api/channels.history";

  Map postData = litmap(

    "token", token,

    "channel", channelID,

    "count", limit,

    "oldest", oldest,

    "latest", latest,

    "inclusive", inclusive ? 1 : 0);

  S data = doPost(postData, url);

  Map map = cast jsonDecode(data);

  assertTrue(map.get("ok"));

  List<Map> _msgs = cast map.get("messages");

  new L<SlackMsg> msgs;

  for (Map msg : reversedList(_msgs)) {

    new SlackMsg m;

    m.type = (S) msg.get("type");

    m.user = (S) msg.get("user");

    m.botName = (S) msg.get("username");

    m.text = htmldecode((S) msg.get("text"));

    m.ts = (S) msg.get("ts");

    m.reactions = msg.get("reactions");

    m.channelID = channelID;

    m.userName = slackGetUserName(token, m.user);

    msgs.add(m);

    //print(structure(m));

  }

  //print(l(msgs) + " messages sucked from slack channel.");

  ret msgs;

}