Implements the /getid command

pom.xml

@@ -2,10 +2,10 @@
          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>
 
-    <name>ExamplePlugin</name>
-    <artifactId>example-plugin</artifactId>
+    <name>GetIdPlugin</name>
+    <artifactId>getid-plugin</artifactId>
     <groupId>org.powernukkit.plugins</groupId>
-    <version>0.1.0-SNAPSHOT</version>
+    <version>1.0.0</version>
     <packaging>jar</packaging>
 
     <dependencies>

src/main/java/org/powernukkit/plugins/getid/GetIdCommand.java

@@ -0,0 +1,70 @@
+package org.powernukkit.plugins.getid;
+
+import cn.nukkit.block.BlockID;
+import cn.nukkit.command.Command;
+import cn.nukkit.command.CommandExecutor;
+import cn.nukkit.command.CommandSender;
+import cn.nukkit.command.PluginCommand;
+import cn.nukkit.command.data.CommandParameter;
+import cn.nukkit.item.ItemID;
+import cn.nukkit.lang.TranslationContainer;
+
+import java.lang.reflect.Modifier;
+import java.util.Arrays;
+import java.util.OptionalInt;
+import java.util.stream.Stream;
+
+public class GetIdCommand implements CommandExecutor {
+    GetIdCommand(PluginCommand<?> command) {
+        command.setExecutor(this);
+        command.getCommandParameters().clear();
+        command.getCommandParameters().put("default", new CommandParameter[] {
+                new CommandParameter("blockOrItemName", false,
+                        Stream.of(BlockID.class, ItemID.class)
+                                .map(Class::getDeclaredFields)
+                                .flatMap(Arrays::stream)
+                                .filter(f-> f.getModifiers() == (Modifier.PUBLIC | Modifier.STATIC | Modifier.FINAL))
+                                .map(f-> f.getName().toLowerCase())
+                                .toArray(String[]::new)        
+                )
+        });
+    }
+
+    @Override
+    public boolean onCommand(CommandSender commandSender, Command command, String label, String[] args) {
+        if (args.length < 1 || args[0].trim().isEmpty()) {
+            commandSender.sendMessage(new TranslationContainer("commands.generic.usage", command.getUsage()));
+        }
+        String name = args[0].trim();
+        OptionalInt id = findId(ItemID.class, name);
+        if (!id.isPresent()) {
+            id = findId(BlockID.class, name);
+            if (id.isPresent()) {
+                int blockId = id.getAsInt();
+                if (blockId > 255) {
+                    id = OptionalInt.of(255 - blockId);
+                }
+            }
+        }
+
+        if (!id.isPresent()) {
+            commandSender.sendMessage(name+" was not found");
+        } else {
+            commandSender.sendMessage(name + " = " + id.getAsInt());
+        }
+        return true;
+    }
+
+    private OptionalInt findId(Class<?> c, String name) {
+        return Arrays.stream(c.getDeclaredFields())
+                .filter(f -> f.getModifiers() == (Modifier.PUBLIC | Modifier.STATIC | Modifier.FINAL))
+                .filter(f -> f.getName().equalsIgnoreCase(name))
+                .mapToInt(f -> {
+                    try {
+                        return f.getInt(null);
+                    } catch (IllegalAccessException e) {
+                        throw new InternalError(e);
+                    }
+                }).findFirst();
+    }
+}

src/main/java/org/powernukkit/plugins/getid/GetIdPlugin.java

@@ -0,0 +1,11 @@
+package org.powernukkit.plugins.getid;
+
+import cn.nukkit.command.PluginCommand;
+import cn.nukkit.plugin.PluginBase;
+
+public class GetIdPlugin extends PluginBase {
+    @Override
+    public void onEnable() {
+        new GetIdCommand(((PluginCommand<?>) getCommand("getid")));
+    }
+}

src/main/resources/plugin.yml

@@ -1,78 +1,26 @@
-# Required
-# The final name of your plugin, other plugins may use this name to declare dependency on your plugin
-name: CloneMe
+name: GetId
 
-# Required
-# The name of your class file that overrides PluginBase
-main: org.powernukkit.plugins.example.CloneMePlugin
+main: org.powernukkit.plugins.getid.GetIdPlugin
 
-# Required
-# The version of your plugin, it's recommended to follow the https://semver.org/ standard
 version: "1.0.0"
 
-# Required
-# The minimum Cloudburst Nukkit API version, it's not the PowerNukkit version!
-# Setting an outdated version usually don't cause issues so it's not a thing to worry too much 
-api: ["1.0.0"]
+api: ["1.0.11"]
 
-# Optional
-# At which time your plugin will load.
-# Valid options are: POSTWORLD, STARTUP
-# Default value is POSTWORLD
-load: POSTWORLD
+author: joserobjr
 
-# Optional
-# Your name or your organization name or how people identify you
-author: Nukkit Project
+description: Simple plugin that shows the ID of a block using the /getid command
 
-# Optional
-# Explain in few words what this plugin does
-description: Example plugin showing the API
+website: https://github.com/PowerNukkit/getid-plugin
 
-# Optional
-# A link where the admins can find more info about your plugin
-website: https://github.com/Nukkit/ExamplePlugin
-
-# Optional
-# Every sub-item must be a block, the key is the command name, you can create as many commands as you want
-# Make sure to keep the exact same alignment, it is important
 commands:
-  # The key is how the command will be used, like /cloneme . Avoid uppercase, the client game don't like it so much and may crash.
-  cloneme:
-    # Optional
-    # This information will be displayed in /help
-    description: Example command
+  getid:
+    description: Shows the ID of an item or block by it's name
 
-    # Optional
-    # This information will be displayed in /help and when your command executor returns false
-    usage: "/example"
+    usage: "/getid light_block"
 
-    # Optional
-    # The permission required to use your command. It's a good practice to always define one even if the command can be used by everybody
-    # More information below
-    permission: cloneme.cmd.use
+    permission: getid.cmd.use
 
-# Optional
-# Although you don't need to register your permissions here for them to work, it's good to allow the server owners to see all them quicker
-# This section also allows to customize their behavior and provide more information about them
-# You can also create group of permission
-# Also, every sub-item must be a block just like the commands block above
 permissions:
-  # The key must be the same value you use to define the permission
-  # It's a good practice to prefix it with your plugin name and create segmentation and then group them to make the permission management easier
-  cloneme.cmd.use:
-    # Optional
-    # This can be used by permission management plugins to show details about the permission key
-    description: "Allows the user to run the example command"
-
-    # Optional
-    # If a player don't have an allow-deny definition for this key, this default value will be used
-    # Valid options: 
-    # - true: the permission is granted by default to everybody
-    # - false: the permission is revoked by default to everybody, including admins and OP
-    # - op: the permission is revoked by default to everybody, but is granted to OP players
-    # - notop: the permission is granted by default to everybody, but is revoked to OP players
-    # Default value is false
+  getid.cmd.use:
+    description: "Allows the user to run the getid command"
     default: true
-
-# TODO Add all possible configuration here