CommandExecutor.java

package com.nicewuerfel.blockown.command;

import com.nicewuerfel.blockown.Message;
import com.nicewuerfel.blockown.Setting;
import com.nicewuerfel.blockown.database.Database;
import com.nicewuerfel.blockown.output.Output;
import com.nicewuerfel.blockown.protection.Protection;

import org.bukkit.OfflinePlayer;
import org.bukkit.command.CommandSender;
import org.bukkit.command.ConsoleCommandSender;
import org.bukkit.entity.Player;

import javax.annotation.Nonnull;

public abstract class CommandExecutor implements org.bukkit.command.CommandExecutor {

  protected final Setting setting;
  protected final Database database;
  protected final Protection protection;

  public CommandExecutor(Setting setting, Database database, Protection protection) {
    this.setting = setting;
    this.database = database;
    this.protection = protection;
  }

  /**
   * Checks whether sender is instance of Player.<br>
   * If not, sends an appropriate message to the sender.
   *
   * @param sender the CommandSender
   * @return the player, or Optional.absent()
   */
  boolean isPlayer(CommandSender sender) {
    if (sender instanceof Player) {
      return true;
    } else {
      sender.sendMessage(Message.COMMAND_PLAYERS_ONLY.getMessage());
      return false;
    }
  }

  /**
   * If the sender is an instance of ConsoleCommandSender, returns true. If not, sends a message to
   * the sender and returns false.
   *
   * @param sender the CommandSender
   * @return true, if sender is console.
   */
  boolean isConsole(@Nonnull CommandSender sender) {
    if (sender instanceof ConsoleCommandSender) {
      return true;
    } else {
      sender.sendMessage(Message.COMMAND_CONSOLE_ONLY.getMessage());
      return false;
    }
  }

  boolean isValid(@Nonnull OfflinePlayer player) {
    return player.hasPlayedBefore() || player.isOnline();
  }

  /*
   * @author Njol (bukkit forums)
   */
  // protected <T extends Entity> T getTarget(Location eyeLocation, Iterable<T> entities) {
  // T target = null;
  // double threshold = 1;
  // for (T other : entities) {
  // Vector n = other.getLocation().toVector().subtract(eyeLocation.getDirection());
  // if (eyeLocation.getDirection().normalize().crossProduct(n).lengthSquared() < threshold &&
  // n.normalize().dot(eyeLocation.getDirection().normalize()) >= 0) {
  // if (target == null || target.getLocation().distanceSquared(eyeLocation) >
  // other.getLocation().distanceSquared(eyeLocation))
  // target = other;
  // }
  // }
  // return target;
  // }

  protected Output getOutput() {
    return setting.getOutput();
  }
}