Add Nexo custom block support

pom.xml

@@ -58,6 +58,7 @@
         <!-- More visible way how to change dependency versions -->
         <bentobox.version>3.10.0</bentobox.version>
         <items-adder.version>4.0.10</items-adder.version>
+        <nexo.version>1.8.0</nexo.version>
         <level.version>2.6.2</level.version>
         <bank.version>1.3.0</bank.version>
         <!-- Revision variable removes warning about dynamic version -->
@@ -151,6 +152,13 @@
             <releases><enabled>true</enabled></releases>
             <snapshots><enabled>false</enabled></snapshots>
         </repository>
+        <!-- Nexo API -->
+        <repository>
+            <id>nexomc</id>
+            <url>https://repo.nexomc.com/releases/</url>
+            <releases><enabled>true</enabled></releases>
+            <snapshots><enabled>false</enabled></snapshots>
+        </repository>
         <!-- General Maven public mirror -->
         <repository>
             <id>codemc-repo</id>
@@ -251,6 +259,18 @@
             <version>${items-adder.version}</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>com.nexomc</groupId>
+            <artifactId>nexo</artifactId>
+            <version>${nexo.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/world/bentobox/aoneblock/AOneBlock.java

@@ -24,11 +24,13 @@
 import world.bentobox.aoneblock.listeners.InfoListener;
 import world.bentobox.aoneblock.listeners.ItemsAdderListener;
 import world.bentobox.aoneblock.listeners.JoinLeaveListener;
+import world.bentobox.aoneblock.listeners.NexoListener;
 import world.bentobox.aoneblock.listeners.NoBlockHandler;
 import world.bentobox.aoneblock.listeners.StartSafetyListener;
 import world.bentobox.aoneblock.oneblocks.OneBlockCustomBlockCreator;
 import world.bentobox.aoneblock.oneblocks.OneBlocksManager;
 import world.bentobox.aoneblock.oneblocks.customblock.ItemsAdderCustomBlock;
+import world.bentobox.aoneblock.oneblocks.customblock.NexoCustomBlock;
 import world.bentobox.aoneblock.requests.IslandStatsHandler;
 import world.bentobox.aoneblock.requests.LocationStatsHandler;
 import world.bentobox.bentobox.api.addons.GameModeAddon;
@@ -53,6 +55,8 @@ public class AOneBlock extends GameModeAddon {
     private static final String THE_END = "_the_end";
     /** Whether ItemsAdder is present on the server */
     private boolean hasItemsAdder = false;
+    /** Whether Nexo is present on the server */
+    private boolean hasNexo = false;
 
     /** The addon settings */
     private Settings settings;
@@ -116,6 +120,13 @@ public void onLoad() {
             OneBlockCustomBlockCreator.register("itemsadder", ItemsAdderCustomBlock::fromMap);
             hasItemsAdder = true;
         }
+        // Check if Nexo exists, if yes register listener
+        if (Bukkit.getPluginManager().getPlugin("Nexo") != null) {
+            registerListener(new NexoListener(this));
+            OneBlockCustomBlockCreator.register(NexoCustomBlock::fromId);
+            OneBlockCustomBlockCreator.register("nexo", NexoCustomBlock::fromMap);
+            hasNexo = true;
+        }
         // Save the default config from config.yml
         saveDefaultConfig();
         // Load settings from config.yml. This will check if there are any issues with
@@ -398,6 +409,13 @@ public boolean hasItemsAdder() {
         return hasItemsAdder;
     }
 
+    /**
+     * @return true if Nexo is on the server
+     */
+    public boolean hasNexo() {
+        return hasNexo;
+    }
+
     /**
      * Set the addon's world. Used only for testing.
      * @param world world

src/main/java/world/bentobox/aoneblock/listeners/NexoListener.java

@@ -0,0 +1,28 @@
+package world.bentobox.aoneblock.listeners;
+
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+import com.nexomc.nexo.api.events.NexoItemsLoadedEvent;
+import world.bentobox.aoneblock.AOneBlock;
+
+/**
+ * Handles NexoItemsLoadedEvent which is fired when Nexo loads or reloads its data
+ */
+public class NexoListener implements Listener {
+
+    private final AOneBlock addon;
+
+    public NexoListener(AOneBlock addon) {
+        this.addon = addon;
+    }
+
+    /**
+     * Handle NexoItemsLoadedEvent then reload the addon if it gets triggered
+     * @param e - NexoItemsLoadedEvent
+     */
+    @EventHandler
+    public void onLoad(NexoItemsLoadedEvent e) {
+        addon.loadData();
+    }
+}

src/main/java/world/bentobox/aoneblock/oneblocks/customblock/NexoCustomBlock.java

@@ -0,0 +1,45 @@
+package world.bentobox.aoneblock.oneblocks.customblock;
+
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+
+import com.nexomc.nexo.api.NexoBlocks;
+import world.bentobox.aoneblock.AOneBlock;
+import world.bentobox.aoneblock.oneblocks.OneBlockCustomBlock;
+import world.bentobox.bentobox.BentoBox;
+
+public class NexoCustomBlock implements OneBlockCustomBlock {
+    private final String itemId;
+
+    public NexoCustomBlock(String itemId) {
+        this.itemId = itemId;
+    }
+
+    public static Optional<NexoCustomBlock> fromId(String id) {
+        if (NexoBlocks.isCustomBlock(id)) {
+            return Optional.of(new NexoCustomBlock(id));
+        }
+        return Optional.empty();
+    }
+
+    public static Optional<NexoCustomBlock> fromMap(Map<?, ?> map) {
+        return Optional
+                .ofNullable(Objects.toString(map.get("id"), null))
+                .flatMap(NexoCustomBlock::fromId);
+    }
+
+    @Override
+    public void execute(AOneBlock addon, Block block) {
+        try {
+            block.setType(Material.AIR);
+            NexoBlocks.place(itemId, block.getLocation());
+        } catch (Exception e) {
+            BentoBox.getInstance().logError("Could not place Nexo block " + itemId + ": " + e.getMessage());
+            block.setType(Material.STONE);
+        }
+    }
+}