Update to Minecraft 1.13

.gitignore

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+# Eclipse stuff
+.classpath
+.project
+.settings/
+
+# netbeans
+nbproject/
+nbactions.xml
+
+# we use maven!
+build.xml
+
+# maven
+target/
+dependency-reduced-pom.xml
+
+# vim
+.*.sw[a-p]
+
+# various other potential build files
+build/
+bin/
+dist/
+manifest.mf
+
+# Mac filesystem dust
+.DS_Store/
+
+# intellij
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# other files
+*.log*
+
+# delombok
+*/src/main/lombok

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>net.nekonekoserver</groupId>
+    <artifactId>IronElevators</artifactId>
+    <version>1.13</version>
+    <packaging>jar</packaging>
+
+    <name>IronElevators</name>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <defaultGoal>clean package</defaultGoal>
+        <finalName>${project.artifactId}</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.6.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <encoding>${project.build.sourceEncoding}</encoding>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>spigotmc-public</id>
+            <url>https://hub.spigotmc.org/nexus/content/groups/public/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.bukkit</groupId>
+            <artifactId>bukkit</artifactId>
+            <version>1.13-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.0</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

src/main/java/me/ScarleTomato/IronElevators/EventListener.java

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+package me.ScarleTomato.IronElevators;
+
+import lombok.RequiredArgsConstructor;
+import org.bukkit.Location;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.bukkit.event.player.PlayerToggleSneakEvent;
+
+@RequiredArgsConstructor
+public final class EventListener implements Listener {
+
+    private final IronElevators plugin;
+
+    private boolean searchFloor(Block floor) {
+        return floor.getType() == plugin.ELEVATOR_MATERIAL
+                && floor.getRelative(BlockFace.UP).getType().isTransparent()
+                && floor.getRelative(BlockFace.UP, 2).getType().isTransparent();
+    }
+
+    private void teleport(Player player, Location to) {
+        player.teleport(to);
+        player.getWorld().playSound(to, plugin.ELEVATOR_WHOOSH, 1, 0);
+    }
+
+    @EventHandler
+    public void downElevator(PlayerToggleSneakEvent event) {
+        Player player = event.getPlayer();
+        Block block = player.getLocation().getBlock().getRelative(BlockFace.DOWN);
+        if (player.hasPermission("ironelevators.use") && !player.isSneaking() && block.getType() == plugin.ELEVATOR_MATERIAL) {
+            block = block.getRelative(BlockFace.DOWN, plugin.MIN_ELEVATION);
+            int search = plugin.MAX_ELEVATION;
+            while (search > 0 && !(searchFloor(block))) {
+                search--;
+                block = block.getRelative(BlockFace.DOWN);
+            }
+            if (search > 0) {
+                Location loc = player.getLocation();
+                loc.setY(loc.getY() - plugin.MAX_ELEVATION - 3 + search);
+                teleport(player, loc);
+            }
+        }
+    }
+
+    @EventHandler
+    public void upElevator(PlayerMoveEvent event) {
+        Player player = event.getPlayer();
+        Block block = event.getTo().getBlock().getRelative(BlockFace.DOWN);
+        if (player.hasPermission("ironelevators.use") && event.getFrom().getY() < event.getTo().getY() && block.getType() == plugin.ELEVATOR_MATERIAL) {
+            block = block.getRelative(BlockFace.UP, plugin.MIN_ELEVATION);
+            int search = plugin.MAX_ELEVATION;
+            while (search > 0 && !(searchFloor(block))) {
+                search--;
+                block = block.getRelative(BlockFace.UP);
+            }
+            if (search > 0) {
+                Location loc = player.getLocation();
+                loc.setY(loc.getY() + plugin.MAX_ELEVATION + 3 - search);
+                teleport(player, loc);
+            }
+        }
+    }
+}