GH-587 Implement teleport to spawn on first join (#588)

eternalcore-core/src/main/java/com/eternalcode/core/configuration/implementation/PluginConfiguration.java

@@ -61,6 +61,17 @@ public static class Database {
         public int port = 3306;
     }
 
+    @Description({ "", "# Join settings" })
+    public Join join = new Join();
+
+    @Contextual
+    public static class Join {
+
+        @Description("# Teleport to spawn on first join")
+        public boolean teleportToSpawnOnFirstJoin = true;
+
+    }
+
     @Description({ " ", "# Teleport request section" })
     public TeleportAsk teleportAsk = new TeleportAsk();
 

eternalcore-core/src/main/java/com/eternalcode/core/feature/firstjoin/FirstJoinController.java

@@ -0,0 +1,60 @@
+package com.eternalcode.core.feature.firstjoin;
+
+import com.eternalcode.annotations.scan.feature.FeatureDocs;
+import com.eternalcode.core.configuration.implementation.LocationsConfiguration;
+import com.eternalcode.core.configuration.implementation.PluginConfiguration;
+import com.eternalcode.core.injector.annotations.Inject;
+import com.eternalcode.core.injector.annotations.component.Controller;
+import com.eternalcode.core.shared.Position;
+import com.eternalcode.core.shared.PositionAdapter;
+import io.papermc.lib.PaperLib;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@FeatureDocs(
+    description = "Teleport to spawn on first join",
+    name = "Player First Join"
+)
+@Controller
+public class FirstJoinController implements Listener {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(FirstJoinController.class);
+
+    private final LocationsConfiguration locationsConfiguration;
+    private final PluginConfiguration pluginConfiguration;
+
+    @Inject
+    public FirstJoinController(LocationsConfiguration locationsConfiguration, PluginConfiguration pluginConfiguration) {
+        this.locationsConfiguration = locationsConfiguration;
+        this.pluginConfiguration = pluginConfiguration;
+    }
+
+    @EventHandler
+    void onFirstJoin(PlayerJoinEvent event) {
+        if (!this.pluginConfiguration.join.teleportToSpawnOnFirstJoin) {
+            return;
+        }
+
+        Player player = event.getPlayer();
+
+        if (player.hasPlayedBefore()) {
+            return;
+        }
+
+        Position spawnPosition = this.locationsConfiguration.spawn;
+
+        if (spawnPosition == null || spawnPosition.isNoneWorld()) {
+            LOGGER.warn("In the configuration, the teleportToSpawnOnFirstJoin function is enabled but spawn is not set! Set it using the /setspawn command");
+
+            return;
+        }
+
+        Location spawnLocation = PositionAdapter.convert(spawnPosition);
+        PaperLib.teleportAsync(player, spawnLocation);
+    }
+}