Implemented CityCommand

src/main/java/moe/oko/opennaw/OpenNAW.java

@@ -2,6 +2,7 @@ package moe.oko.opennaw;
 
 import moe.oko.opennaw.command.NationCommand;
 import moe.oko.opennaw.util.ChatHandler;
+import moe.oko.opennaw.util.CityHandler;
 import moe.oko.opennaw.util.GroupHandler;
 import moe.oko.opennaw.util.NationHandler;
 import net.luckperms.api.LuckPerms;
@@ -13,6 +14,7 @@ public final class OpenNAW extends JavaPlugin {
 
     public static OpenNAW instance;
     public NationHandler nationHandler;
+    public CityHandler cityHandler;
     public GroupHandler groupHandler;
     private LuckPerms luckPerms;
 
@@ -23,6 +25,7 @@ public final class OpenNAW extends JavaPlugin {
     public NationHandler getNationHandler() {
         return nationHandler;
     }
+    public CityHandler getCityHandler(){ return cityHandler; }
     public GroupHandler getGroupHandler() { return groupHandler; }
 
     @Override

src/main/java/moe/oko/opennaw/command/CityCommand.java

@@ -0,0 +1,54 @@
+package moe.oko.opennaw.command;
+
+import moe.oko.opennaw.OpenNAW;
+import moe.oko.opennaw.util.CommandHelper;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+import org.bukkit.entity.Player;
+
+import java.util.List;
+
+public class CityCommand implements TabExecutor {
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (!(sender instanceof Player)) {
+            sender.sendMessage(CommandHelper.NOT_PLAYER);
+            return true;
+        }
+
+        if (args.length < 1) { return false; }
+
+        var cityList = OpenNAW.getInstance().getCityHandler().getCityList();
+
+        switch (args[0]) {
+            case "add": {
+                var location = ((Player) sender).getLocation();
+                OpenNAW.getInstance().getCityHandler().addCity(args[1], args[2], location);
+                sender.sendMessage("Created city " + args[1] + " at " + location.getBlockX() + " " + location.getBlockY() + " " + location.getBlockZ());
+            }
+            case "remove": {
+                OpenNAW.getInstance().getCityHandler().removeCity(args[1]);
+                sender.sendMessage("Removed city " + args[1]);
+            }
+            case "list": {
+                final var msg = cityList.size() == 0
+                        ? "There are no cities"
+                        : "There are " + cityList.size() + " cities: " + cityList;
+                sender.sendMessage(msg);
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+        return switch (args.length) {
+            case 1 -> List.of("add", "list", "modify", "remove");
+            case 2 -> OpenNAW.getInstance().getCityHandler().getCityList();
+            default -> null;
+        };
+    }
+}

src/main/java/moe/oko/opennaw/model/City.java

@@ -16,4 +16,32 @@ public class City {
         this.point = location;
         this.health = 500;
     }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getResource() {
+        return resource;
+    }
+
+    public Nation getOwner() {
+        return owner;
+    }
+
+    public void setOwner(Nation nation) {
+        this.owner = nation;
+    }
+
+    public Location getPoint() {
+        return point;
+    }
+
+    public short getHealth() {
+        return health;
+    }
+
+    public void damage(short damage) {
+        this.health -= damage;
+    }
 }

src/main/java/moe/oko/opennaw/util/CityHandler.java

@@ -0,0 +1,31 @@
+package moe.oko.opennaw.util;
+
+import moe.oko.opennaw.model.City;
+import moe.oko.opennaw.model.Nation;
+import org.bukkit.Location;
+import org.bukkit.Material;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+public class CityHandler {
+    private HashMap<String, City> cities = new HashMap<>();
+
+    public void addCity(String name, String resource, Location location) {
+        cities.put(name, new City(name, resource, location));
+        location.getBlock().setType(Material.SPONGE);
+    }
+
+    public void removeCity(String name) { cities.remove(name);}
+
+    public void setCityOwner(City city, Nation nation) { cities.get(city.getName()).setOwner(nation); }
+
+    public List<String> getCityList() {
+        List<String> cityList = new ArrayList<String>();
+        for (City city : cities.values()) {
+            cityList.add(city.getName());
+        }
+        return cityList;
+    }
+}

src/main/java/moe/oko/opennaw/util/NationHandler.java

@@ -11,16 +11,16 @@ public class NationHandler {
 
     private HashMap<String, Nation> nations = new HashMap<>();
 
-    public void addNation(String nation, Group group) {
+    public void addNation(String name, Group group) {
-        nations.put(nation, new Nation(nation, group));
+        nations.put(name, new Nation(name, group));
     }
 
-    public Nation removeNation(String name) {
+    public void removeNation(String name) {
-        return nations.remove(name);
+        nations.remove(name);
     }
 
-    public Group getNationGroup(String nation) {
+    public Group getNationGroup(String name) {
-        return nations.get(nation).getGroup();
+        return nations.get(name).getGroup();
     }
 
     public List<String> getNationList() {