spawn xp tutorial, fix compiling client link

docs/tutorials/spawnxp.md

@@ -1,5 +1,5 @@
 ## /spawnxp command
-This tutorial will cover spawning in entities using the `ModAPI.promisify()` API.
+This tutorial will cover spawning in entities using the [`ModAPI.promisify()`](../apidoc/promisify.md) API.
 
 As usual, we'll start with the boilerplate:
 ```javascript
@@ -10,4 +10,58 @@ As usual, we'll start with the boilerplate:
 
     //future code
 })();
-```
+```
+We'll move context to the server, and add a command listener, and ensure the sender is a player:
+```javascript
+PluginAPI.dedicatedServer.appendCode(function () { //Run this code on the server
+    PluginAPI.addEventListener("processcommand", (event) => { //Command processing event
+        if (
+            !ModAPI.reflect.getClassById("net.minecraft.entity.player.EntityPlayerMP")
+                .instanceOf(event.sender.getRef())
+        ) {
+            return;
+        }
+    });
+});
+```
+
+Next, we'll check that the command is /spawnxp. If it is, we'll get the current dimension of the player, and spawn an XP orb at the sender's position. To construct the XP orb, we'll get the `EntityXPOrb` class and get the [first constructor](https://nurmarvin.github.io/Minecraft-1.8-JavaDocs/net/minecraft/entity/EntityXPOrb.html)
+```javascript
+PluginAPI.dedicatedServer.appendCode(function () { //Run this code on the server
+    PluginAPI.addEventListener("processcommand", (event) => { //Command processing event
+        if (
+            !ModAPI.reflect.getClassById("net.minecraft.entity.player.EntityPlayerMP") //If it isn't a player, exit the method
+                .instanceOf(event.sender.getRef())
+        ) {
+            return;
+        }
+
+        if (event.command.toLowerCase().startWith("/spawnxp")) {
+            const world = event.sender.getServerForPlayer(); //get the current dimension
+            const senderPos = event.sender.getPosition(); //get the player's current position
+
+            const EntityXP = ModAPI.reflect.getClassByName("EntityXPOrb"); // Get the entity xp orb class
+            
+            const xporb = EntityXP.constructors[0](world.getRef(), senderPos.getX(), senderPos.getY(), senderPos.getZ(), 10); //Construct the first constructor, with arguments, World, x, y, z, xp value
+
+            //Get the spawn entity in world method
+            var spawnEntityInWorldMethod = ModAPI.hooks.methods[ModAPI.util.getMethodFromPackage("net.minecraft.world.World", "spawnEntityInWorld")];
+            //Because this method reads and writes data to chunks, it tries to save and load the eaglercraft state, which won't work if eaglercraft is also running its own code.
+            //To work around this issue, use ModAPI.promisify() to convert the method into one that returns a promise
+            spawnEntityInWorldMethod = ModAPI.promisify(spawnEntityInWorldMethod);
+
+            //we can now use the spawnEntityInWorld method
+            //wherever you see getRef(), it means to retrieve the raw, untouched data that TeaVM can use.
+            spawnEntityInWorldMethod(world.getRef(), xporb).then(result => {
+                // Get the chat component class
+                const ChatComponentTextClass = ModAPI.reflect.getClassById("net.minecraft.util.ChatComponentText");
+
+                // Construct the chat component and send it to the client.
+                event.sender.addChatMessage(ChatComponentTextClass.constructors[0](ModAPI.util.str("An xp orb has been spawned!")));
+            });
+
+            //Stop the unknown command error
+            event.preventDefault = true;
+        }
+    });
+});

index.html

@@ -117,7 +117,7 @@
           <summary>
             How do I compile my own unobfuscated unsigned Eaglercraft build?
           </summary>
-          <a href="docs/compiling_client.md">tutorial here</a>
+          <a href="docs/compiling_client">tutorial here</a>
         </details>
         <details>
           <summary>How does this tool work?</summary>