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!7

cmodule GreeterBot extends DynTalkBot2<GreeterBot.ByServer3> {
  long greetingsPerformed;
  
  start {
    makeByServer = () -> new ByServer3;
    useAGIBlueForDropPunctuation = false;
    preprocessAtSelfToMyName = false;
    dropPunctuation = false;
  }
 
  class ByServer3 extends DynTalkBot2.ByServer2 {
    bool enabled;
    S msg = "Welcome <user>!";
    long channelToGreetIn;

    GreeterBot m() { ret GreeterBot.this; }
    
    void onUserJoin(long userID, O... _) {
      S msg = replace(this.msg, "<user>", discordAt(userID));
      if (channelToGreetIn == 0) setField(channelToGreetIn := preferredChannelID);
      if (channelToGreetIn == 0) fail("Have no greeting channel"); 
      postInChannel(channelToGreetIn, msg);
    }
    
    S processSimplifiedLine(S s, O... _) {
      try answer super.processSimplifiedLine(s, _); // adding authorized users etc.
      
      new Matches m;
      
      S sOld = s;
      s = dropPrefixOrNull(myPrefix(), s);
      if (s == null) {
        print("no got prefix: " + quote(myPrefix()) + " / " + quote(sOld));
        null;
      }
      
      if (eqic(s, "prefer this channel")) {
        try answer checkAuth(_);
        long channelID = longPar channelID(_);
        if (channelID == 0) ret "No channel";
        setField(channelToGreetIn := channelID);
        ret "OK, will greet here from now on.";
      }
      
      if (eqic(s, "simulate greeting")) {
        onUserJoin(longPar userID(_), _);
        ret "Greeting simulated";
      }
      
      if (eqic(s, "get message"))
        ret msg;
        
      if (swic_trim(s, "set message:", m)) {
        try answer checkAuth(_);
        setField(msg := m.rest();
        ret "Message changed to: " + msg;
      }
      
      if (eqic(s, "enable")) {
        try answer checkAuth(_);
        setField(enabled := true);
        ret "Enabled. Will greet every new arrival!";
      }
      
      if (eqic(s, "disable")) {
        try answer checkAuth(_);
        setField(enabled := true);
        ret "Disabled. Will not greet anyone.";
      }
      
      if (eqic(s, "help"))
        ret trim([[
  I am a simple greeter bot. Status: ]] + enabledDisabled(enabled) + [[. Commands:
  
  @me **simulate greeting** -- greet you to test the bot
  @me **get message** -- show current greeting message
  @me **set message: Hello <user>! Bla bla...** -- change greeting. <user> is replaced with user name
  @me **prefer this channel** -- posts greetings in the channel you write this in
  @me **enable/disable** -- enable/disable the auto-greeting
  @me **masters**/**add master**/**delete master** -- change bot ownership
  @me **source**/**support channel** -- see sources or join the support discord
  
  [Bot made by https://BotCompany.de]
  ]]).replace("@me", atSelf());
  
      null;
    }
  }
}