implemented drawBlock, drawCuboid and drawItem

src/main/java/io/singularitynet/Client/ClientStateMachine.java

@@ -25,6 +25,7 @@
 import io.singularitynet.MissionHandlerInterfaces.IVideoProducer;
 import io.singularitynet.MissionHandlerInterfaces.IWantToQuit;
 import io.singularitynet.MissionHandlerInterfaces.IWorldGenerator;
+import io.singularitynet.MissionHandlers.DrawImplementation;
 import io.singularitynet.MissionHandlers.MissionBehaviour;
 import io.singularitynet.MissionHandlers.MultidimensionalReward;
 import io.singularitynet.Server.VereyaModServer;
@@ -1084,6 +1085,11 @@ protected void execute()
                         if (MinecraftClient.getInstance().getServer() != null) {
                             MinecraftClient.getInstance().getServer().setOnlineMode(false);
                         }
+                        // draw blocks and entities from DrawingDecorator section
+                        List<Object> worldDecorator = ClientStateMachine.this.currentMissionInit.getMission().getServerSection().getServerHandlers().getWorldDecorators();
+                        if (!worldDecorator.isEmpty()){
+                            DrawImplementation.draw(worldDecorator);
+                        }
                     }
                     else
                     {

src/main/java/io/singularitynet/MissionHandlers/DrawImplementation.java

@@ -0,0 +1,127 @@
+package io.singularitynet.MissionHandlers;
+
+import io.singularitynet.projectmalmo.*;
+import jakarta.xml.bind.JAXBElement;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.server.command.CommandManager;
+import net.minecraft.server.command.ServerCommandSource;
+import org.apache.logging.log4j.LogManager;
+
+import java.util.List;
+
+public class DrawImplementation extends DrawingDecorator {
+    public static void draw(List<Object> worldDecorator) {
+        //get command manager and command source
+        CommandManager commandManager = null;
+        ServerCommandSource commandSource= null;
+        try {
+            MinecraftClient client = MinecraftClient.getInstance();
+            commandManager = client.getServer().getCommandManager();
+            commandSource = client.getServer().getCommandSource();
+        } catch (Exception e) {
+            LogManager.getLogger().error("Failed to get command manager and command source");
+            LogManager.getLogger().error(e);
+        }
+        try {
+                for (Object obj : worldDecorator){
+                    List<JAXBElement<? extends DrawObjectType>> drawObjects = null;
+                    if (obj instanceof DrawingDecorator){
+                        drawObjects = ((DrawingDecorator)obj).getDrawObjectType();
+                    }
+                    for (JAXBElement<? extends DrawObjectType> drawObject : drawObjects){
+                        switch (drawObject.getValue()) {
+                            case DrawBlock db -> drawBlock(db, commandManager, commandSource);
+                            case DrawCuboid dc -> drawCuboid(dc, commandManager, commandSource);
+                            case DrawItem di -> drawItem(di, commandManager, commandSource);
+                            case DrawLine dl -> drawLine(dl, commandManager, commandSource);
+//                            case DrawSphere ds -> drawSphere(ds, commandManager, commandSource);
+                            default -> LogManager.getLogger().warn("The type " + drawObject.getClass().getSimpleName() + " is not supported");
+                        }
+                    }
+                }
+        } catch (Exception e) {
+            LogManager.getLogger().error("Failed to draw objects");
+            LogManager.getLogger().error(e);
+        }
+    }
+
+    public static void drawBlock(DrawBlock val, CommandManager commandManager, ServerCommandSource commandSource){
+        try {
+            String command = "/setblock " + val.getX() + " " +
+                    val.getY() + " " +
+                    val.getZ() + " " +
+                    val.getType().value();
+            commandManager.executeWithPrefix(commandSource, command);
+        } catch (Exception e) {
+            LogManager.getLogger().error("Failed to draw the block");
+            LogManager.getLogger().error(e);
+        }
+    }
+
+    public static void drawCuboid(DrawCuboid val, CommandManager commandManager, ServerCommandSource commandSource){
+        try {
+            String command = "/fill " + val.getX1() + " " +
+                    val.getY1() + " " +
+                    val.getZ1() + " " +
+                    val.getX2() + " " +
+                    val.getY2() + " " +
+                    val.getZ2() + " " +
+                    val.getType().value();
+            commandManager.executeWithPrefix(commandSource, command);
+        } catch (Exception e) {
+            LogManager.getLogger().error("Failed to draw the cuboid");
+            LogManager.getLogger().error(e);
+        }
+    }
+
+    public static void drawItem(DrawItem val, CommandManager commandManager, ServerCommandSource commandSource){
+        try {
+            String command = "/summon item " + val.getX() + " " +
+                    val.getY() + " " +
+                    val.getZ() + " " +
+                    "{Item:{id:" + val.getType() + ",Count:1}}";
+            commandManager.executeWithPrefix(commandSource, command);
+        } catch (Exception e) {
+            LogManager.getLogger().error("Failed to draw the item");
+            LogManager.getLogger().error(e);
+        }
+    }
+
+    public static void drawLine(DrawLine val, CommandManager commandManager, ServerCommandSource commandSource){
+        try {
+            int dx = val.getX2() - val.getX1();
+            int dy = val.getY2() - val.getY1();
+            int dz = val.getZ2() - val.getZ1();
+
+            int steps = Math.max(Math.abs(dx), Math.max(Math.abs(dy), Math.abs(dz)));
+
+            double xInc = (double)dx / steps;
+            double yInc = (double)dy / steps;
+            double zInc = (double)dz / steps;
+
+            for (int i = 0; i <= steps; i++){
+                int x = (int)Math.round(val.getX1() + i * xInc);
+                int y = (int)Math.round(val.getY1() + i * yInc);
+                int z = (int)Math.round(val.getZ1() + i * zInc);
+                setBlock(x, y, z, val.getType().value(), commandManager, commandSource);
+            }
+
+        } catch (Exception e) {
+            LogManager.getLogger().error("Failed to draw the line");
+            LogManager.getLogger().error(e);
+        }
+    }
+
+    protected static void setBlock(int x, int y, int z, String type, CommandManager commandManager, ServerCommandSource commandSource){
+        try {
+            String command = "/setblock " + x + " " +
+                    y + " " +
+                    z + " " +
+                    type;
+            commandManager.executeWithPrefix(commandSource, command);
+        } catch (Exception e) {
+            LogManager.getLogger().error("Failed to set the block");
+            LogManager.getLogger().error(e);
+        }
+    }
+}