Code

package ua.whitebear60.beehive.cmd;

import net.minecraft.command.CommandBase;
import net.minecraft.command.CommandException;
import net.minecraft.command.ICommandSender;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.text.ITextComponent;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.util.text.TextComponentTranslation;
import net.minecraft.util.text.TextFormatting;
import net.minecraft.util.text.event.ClickEvent;
import net.minecraft.world.GameType;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import ua.whitebear60.beehive.Reference;

import java.util.*;

/*
 * Originally coded by HellFirePvP, modified by WhiteBear60 for the Beehive modpack needs
 */

public class CommandBeehive extends CommandBase {
  private ITextComponent newLine = new TextComponentString("\n");


  private static ITextComponent separator = new TextComponentString("===========\n");

  private static Logger logger = LogManager.getLogger(Reference.NAME);
  private static final String[] COMMANDS = new String[]{
          "help",
          "start",
          "test"
  };

  private List<String> cmdAliases = new ArrayList<>();

  public CommandBeehive() {
    this.cmdAliases.add("beehive");
    this.cmdAliases.add("bee");
  }

  @Override
  public String getName() {
    return "beehive";
  }

  @Override
  public String getUsage(ICommandSender sender) {
    return "/beehive <action>";
  }

  @Override
  public List<String> getAliases() {
    return cmdAliases;
  }

  @Override
  public boolean isUsernameIndex(String[] args, int index) {
    return index == 1;
  }

  @Override
  public void execute(MinecraftServer server, ICommandSender sender, String[] args) throws CommandException {

    ITextComponent only_once = new TextComponentTranslation("beehive.cmd.has_tag");

    HashSet<String> senderTags = new HashSet<String>(sender.getCommandSenderEntity().getTags());
    if (args.length == 0) {
      senderTags.clear();
      senderTags.addAll(sender.getCommandSenderEntity().getTags());
      logger.info("Displaying help...");
      logger.info("The player tags are: " + senderTags);
      displayHelp(sender);
      return;
    }
    if (args.length == 1) {
      String identifier = args[0];
      if ("help".equalsIgnoreCase(identifier)) {
        displayHelp(sender);
      } else if ("start".equalsIgnoreCase(identifier)) {
        // TODO: Move welcome text here and make it translatable.
        if (senderTags.contains("start1")) {
          sender.sendMessage(only_once);
          logger.warn(sender.getName() + " is trying to execute start command more than once.");
          logger.info("The player tags are: " + senderTags);
        }
        if (!senderTags.contains("start1")) {
          ITextComponent welcomeText1 = new TextComponentTranslation("beehive.welcome");
          welcomeText1.getStyle().setColor(TextFormatting.YELLOW);
          ITextComponent welcomeText2 = new TextComponentTranslation("beehive.welcome.page1.c1");
          welcomeText2.getStyle().setColor(TextFormatting.YELLOW);
          ITextComponent welcomeText3 = new TextComponentTranslation("beehive.welcome.page1.c2");
          welcomeText3.getStyle().setColor(TextFormatting.WHITE);
          ITextComponent welcomeText4 = new TextComponentTranslation("beehive.welcome.page1.c3");
          // /millSpawnVillage byzantines tradingvillage 508 497
          welcomeText4.getStyle().setColor(TextFormatting.GREEN).setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/say @a Byzantines village is preparing to spawn"));
//                        sender.sendMessage(welcomeText2);
          ITextComponent welcomeText5 = new TextComponentTranslation("beehive.welcome.page1.c4");
          // /millSpawnVillage seljuk agriculture_village_seljuks 508 497
          welcomeText5.getStyle().setColor(TextFormatting.GREEN).setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/say @a Seljuk Turks village is preparing to spawn"));
          ITextComponent welcomeText6 = new TextComponentTranslation("beehive.welcome.page1.c5");
          // /millSpawnVillage japanese seiji 508 497
          welcomeText6.getStyle().setColor(TextFormatting.GREEN).setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/say @a Japanese village is preparing to spawn"));
          ITextComponent welcomeText7 = new TextComponentTranslation("beehive.welcome.page1.to_next_page");
          welcomeText7.getStyle().setColor(TextFormatting.AQUA);
          ITextComponent welcomeText8 = new TextComponentTranslation("beehive.welcome.click_here");
          welcomeText8.getStyle().setColor(TextFormatting.GREEN).setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/beehive start 1"));
          ITextComponent result = welcomeText1.appendSibling(new TextComponentString(" ")).appendSibling(welcomeText2).appendSibling(new TextComponentString(" ")).appendSibling(welcomeText3).appendSibling(newLine).appendSibling(welcomeText4).appendSibling(newLine).appendSibling(welcomeText5).appendSibling(newLine).appendSibling(welcomeText6).appendSibling(newLine).appendSibling(welcomeText7).appendSibling(new TextComponentString(" ")).appendSibling(welcomeText8);
//          sender.getCommandSenderEntity().addTag("start1");
          sender.sendMessage(result);
        }
//                    BlockPos pos = sender.getPosition();
//                    double px = pos.getX();
//                    double py = 10;
//                    double pz = pos.getZ();
//                    server.getCommandManager().executeCommand( server, "/tp " + sender.getName() + " " + px + " " + py + " " + pz );
      } else if ("test".equalsIgnoreCase(identifier)) {
//                    sender.sendMessage(new TextComponentTranslation("beehive.keyhole.success"));
        sender.sendMessage(new TextComponentString("Test is not implemented yet."));
      }
    } else if (args.length == 2) {
      String identifier = args[1];
      if ("1".equalsIgnoreCase(identifier)) {
        if (senderTags.contains("start2")) {
          sender.sendMessage(only_once);
          logger.warn(sender.getName() + " is trying to execute start command more than once.");
          logger.info("The player tags are: " + senderTags);
        } if (!senderTags.contains("start2")) {
          ITextComponent two_hive = new TextComponentTranslation("beehive.welcome.page2.c1");
          two_hive.getStyle().setColor(TextFormatting.YELLOW);

          ITextComponent sizes = new TextComponentTranslation("beehive.welcome.page2.c2");
          sizes.getStyle().setColor(TextFormatting.YELLOW);

          ITextComponent tp = new TextComponentTranslation("beehive.welcome.page2.c3");
          tp.getStyle().setColor(TextFormatting.YELLOW);

          ITextComponent proceed = new TextComponentTranslation("beehive.welcome.page2.c4");
          proceed.getStyle().setColor(TextFormatting.YELLOW);

          ITextComponent click_here = new TextComponentTranslation("beehive.welcome.click_here");
          click_here.getStyle().setColor(TextFormatting.GREEN).setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/beehive start 2"));

//          sender.getCommandSenderEntity().addTag("start2");
          sender.sendMessage(separator.appendSibling(two_hive).appendSibling(new TextComponentString(" ")).appendSibling(sizes).appendSibling(new TextComponentString(" ")).appendSibling(tp).appendSibling(new TextComponentString(" ")).appendSibling(proceed).appendSibling(new TextComponentString(" ")).appendSibling(click_here));
        }
      }
      if ("2".equalsIgnoreCase(identifier)) {
        if (senderTags.contains("start3")) {
          sender.sendMessage(only_once);
          logger.warn(sender.getName() + " is trying to execute start command more than once.");
          logger.info("The player tags are: " + senderTags);
        } if (!senderTags.contains("start3")) {

          ITextComponent has_tp = new TextComponentTranslation("beehive.welcome.page3.c1");
          has_tp.getStyle().setColor(TextFormatting.YELLOW);
          ITextComponent to_tp = new TextComponentTranslation("beehive.welcome.page3.c2");
          to_tp.getStyle().setColor(TextFormatting.YELLOW);
          ITextComponent big = new TextComponentTranslation("beehive.welcome.page3.c3");
          big.getStyle().setColor(TextFormatting.YELLOW);
          ITextComponent small = new TextComponentTranslation("beehive.welcome.page3.c4");
          small.getStyle().setColor(TextFormatting.YELLOW);
          ITextComponent village = new TextComponentTranslation("beehive.welcome.page3.c5");
          village.getStyle().setColor(TextFormatting.YELLOW);

          ITextComponent goodluck = new TextComponentTranslation("beehive.goodluck");
          goodluck.getStyle().setColor(TextFormatting.YELLOW);

//          sender.getCommandSenderEntity().addTag("start3");
          sender.sendMessage(separator.appendSibling(has_tp).appendSibling(newLine).appendSibling(to_tp).appendSibling(newLine).appendSibling(big).appendSibling(newLine).appendSibling(small).appendSibling(newLine).appendSibling(village).appendSibling(newLine).appendSibling(newLine).appendSibling(goodluck));
          server.commandManager.executeCommand(sender, "/tp " + sender.getName() + " -2 21 -503");

          getCommandSenderAsPlayer(sender).setGameType(GameType.SURVIVAL);

        }

      }
    }
  }

  private void displayHelp(ICommandSender sender) {
    sender.sendMessage(new TextComponentString("\nAvialable Subcommands:"));
    sender.sendMessage(new TextComponentString("§a/beehive start§7 - start the map"));
    sender.sendMessage(new TextComponentString("§a/beehive help§7 - display this help"));
  }

}