Add PlayerJoin event listener to modify player attributes on join and update project configuration

src/main/java/com/alttd/playerutils/PlayerUtils.java

@@ -41,6 +41,7 @@ public final class PlayerUtils extends JavaPlugin {
         pluginManager.registerEvents(new GoatHornEvent(), this);
         pluginManager.registerEvents(new LimitArmorStands(this), this);
         pluginManager.registerEvents(new BlockBlockUseEvent(), this);
+        pluginManager.registerEvents(new PlayerJoin(), this);
 
         RotateBlockEvent rotateBlockEvent = new RotateBlockEvent();
         pluginManager.registerEvents(rotateBlockEvent, this);

src/main/java/com/alttd/playerutils/config/Config.java

@@ -79,4 +79,17 @@ import java.util.Set;
             }
         }
     }
+
+    public static class LOCATOR_BAR {
+        private static final String prefix = "locator_bar.";
+
+        public static double WAYPOINT_RECEIVE_RANGE = 200;
+        public static double WAYPOINT_TRANSMIT_RANGE = 200;
+
+        @SuppressWarnings("unused")
+        private static void load() {
+            WAYPOINT_RECEIVE_RANGE = config.getDouble(prefix, "waypoint_receive_range", WAYPOINT_RECEIVE_RANGE);
+            WAYPOINT_TRANSMIT_RANGE = config.getDouble(prefix, "waypoint_transmit_range", WAYPOINT_TRANSMIT_RANGE);
+        }
+    }
 }

src/main/java/com/alttd/playerutils/event_listeners/PlayerJoin.java

@@ -0,0 +1,38 @@
+package com.alttd.playerutils.event_listeners;
+
+import com.alttd.playerutils.config.Config;
+import lombok.extern.slf4j.Slf4j;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.attribute.AttributeInstance;
+import org.bukkit.attribute.AttributeModifier;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+
+@Slf4j
+public class PlayerJoin implements Listener {
+
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event) {
+        Player player = event.getPlayer();
+        setModifiedAttribute(player, Attribute.WAYPOINT_RECEIVE_RANGE, Config.LOCATOR_BAR.WAYPOINT_RECEIVE_RANGE);
+        setModifiedAttribute(player, Attribute.WAYPOINT_TRANSMIT_RANGE, Config.LOCATOR_BAR.WAYPOINT_TRANSMIT_RANGE);
+    }
+
+    private void setModifiedAttribute(Player player, Attribute attribute, double configValue) {
+        AttributeInstance attributeInstance = player.getAttribute(attribute);
+
+        if (attributeInstance == null) {
+            log.error("Unable to retrieve attribute instance for player {}.", player.getName());
+            return;
+        }
+
+        double waypointReceiveDelta = attributeInstance.getValue() - configValue;
+        AttributeModifier attributeModifier = new AttributeModifier(attribute.getKey(),
+                                                                    waypointReceiveDelta,
+                                                                    AttributeModifier.Operation.ADD_NUMBER);
+        attributeInstance.addModifier(attributeModifier);
+    }
+
+}