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!7

concept Cmd {
  S patterns; // for mmo_parsePattern
  S cmd; // a pattern recognized by #1027443
  int index;
  
  transient MMOPattern parsedPattern;
  void change { parsedPattern = null; super.change(); }
  MMOPattern parsedPattern() {
    if (parsedPattern == null) parsedPattern = mmo_parsePattern(patterns);
    ret parsedPattern;
  }
}

cmodule ScenariosFrontend > DynCRUD<Cmd> {
  S backendModuleLibID = "#1027443/Scenarios";
  
  void handleCommand(Cmd cmd) {
    print("handleCommand " + cmd.cmd;
    if (hasAsteriskTokens(cmd.cmd))
      print("Has arguments");
    else
      dm_call(getBackend(), 'answer, cmd);
  }
  
  S getBackend() {
    ret dm_require(backendModuleLibID);
  }
  
  // API
  
  void copyCommandsFromBackend() {
    for (S cmd : allIfQuotedPatterns(loadSnippet(#1027443)))
      uniqConcept(+cmd);
  }
  
  S answer(S s) null {
    for (Cmd cmd : conceptSortedByField index(Cmd))
      if (mmo_match_parsedPattern(cmd.parsedPattern(), s))
        ret with handleCommand(cmd);
  }
}