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!7

//lib 1400198 // jSlack 1.2.2 (fat jar)
lib 1400206 // jSlack 1.4.2 (fat jar)

import com.github.seratch.jslack.*;
import com.github.seratch.jslack.api.rtm.*;
import com.github.seratch.jslack.api.methods.request.chat.*;
import com.github.seratch.jslack.api.methods.response.chat.*;

static Slack slack;
sbool slackDump = false;

sS slackToken;

static File slackTokenFile() {
  ret javaxSecretDir("oibot-token-2.txt");
}

svoid loadSlackToken() {
  slackToken = trim(loadTextFile(slackTokenFile()));
}

static RTMClient initSlackBot(O answerer) ctex {
  if (slack != null) fail("Slack already started");
  fixContextClassLoader();
  
  if (slackToken == null) loadSlackToken();
  assertNempty("Need slack token: " + slackTokenFile(), slackToken);

  slack = new Slack;
  RTMClient rtm = slack.rtm(slackToken);
  
  rtm.addErrorHandler(error -> {
    print("Got Slack error: " + error);
    appendToTextFile("slack-errors.txt", "\n " + getStackTrace(error) + "\n");
    print("...reconnecting to be sure.");
    thread "Reconnect to Slack" {
      fixContextClassLoader();
      pcall { rtm.disconnect(); }
      print("Disconnected (hopefully)");
      print("Waiting 10, then reconnecting.");
      sleepSeconds(10);
      print("Reconnecting to Slack");
      try {
        rtm.connect();
        print("Done");
      } catch e {
        printStackTrace(e);
        print("Connect failed, restarting module.");
        dm_reloadModule();
      }
    }
  });

  rtm.addMessageHandler((message) -> {
    Map json = jsonDecodeMap(message);
    if (slackDump) pnlStruct(json);
    
    if (eq(json.get("type"), "message")) pcall {
      bool bot = eq(json.get("subtype"), "bot_message");
      S channelID = cast json.get("channel");
      S ts = cast json.get("ts");
      S text = cast json.get("text");
      
      vmBus_send('incomingSlackMessage,
        litmapparams(
          fromBot := bot,
          msgID := ts,
          +channelID,
          content := text,
          +json
          /*+isPrivate*/));
    }
  });

  // must connect within 30 seconds after issuing wss endpoint
  rtm.connect();
  print("Slack inited!");
  
  ret rtm;
}

// no cmodule because of doPost / loadPage
module SlackModule > DynPrintLogAndEnabled {
  switchable S token;
  
  transient new ThreadLocal<Map> msgJSON;
  transient RTMClient rtm;

  start {
    if (!enabled) ret with print("Not enabled");
    
    vm_cleanPrints(); // avoid Swing Unicode problem
    logModuleOutput(); // good idea for chat bots
    
    dm_registerAs('slackModule);
    
    if (nempty(token))
      ret with startSlack();
    
    inputText("Please enter Slack bot token", voidfunc(S s) {
      setField(token := s);
      startSlack();
    });
  }
  
  void startSlack enter {
    ownResource(rtm = initSlackBot(this));
  }
}