From e358b0e4191b1d3b327eda9ef7c2731424925cb6 Mon Sep 17 00:00:00 2001
From: Pilzinsel64 <pilzinsel64@gmx.de>
Date: Mon, 20 Nov 2023 11:10:56 +0100
Subject: [PATCH] add Pilz.Gaming.Minecraft (generate offline player uuid)

---
 .../Pilz.Gaming.Minecraft.csproj              | 15 +++++++
 Pilz.Gaming.Minecraft/Utils.cs                | 43 +++++++++++++++++++
 Pilz.sln                                      | 14 +++++-
 3 files changed, 70 insertions(+), 2 deletions(-)
 create mode 100644 Pilz.Gaming.Minecraft/Pilz.Gaming.Minecraft.csproj
 create mode 100644 Pilz.Gaming.Minecraft/Utils.cs

diff --git a/Pilz.Gaming.Minecraft/Pilz.Gaming.Minecraft.csproj b/Pilz.Gaming.Minecraft/Pilz.Gaming.Minecraft.csproj
new file mode 100644
index 0000000..124e735
--- /dev/null
+++ b/Pilz.Gaming.Minecraft/Pilz.Gaming.Minecraft.csproj
@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
+    <IncrementVersionOnBuild>1.yyyy.Mdd.Hmm</IncrementVersionOnBuild>
+    <Version>1.2023.1120.1110</Version>
+  </PropertyGroup>
+
+</Project>
diff --git a/Pilz.Gaming.Minecraft/Utils.cs b/Pilz.Gaming.Minecraft/Utils.cs
new file mode 100644
index 0000000..e81dcd4
--- /dev/null
+++ b/Pilz.Gaming.Minecraft/Utils.cs
@@ -0,0 +1,43 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Pilz.Gaming.Minecraft
+{
+    public static class Utils
+    {
+        public static string GetUUID(string value)
+        {
+            using var md5 = MD5.Create();
+
+            //extracted from the java code:
+            //new GameProfile(UUID.nameUUIDFromBytes(("OfflinePlayer:" + name).getBytes(Charsets.UTF_8)), name));
+            byte[] data = md5.ComputeHash(Encoding.ASCII.GetBytes(value));
+            //set the version to 3 -> Name based md5 hash
+            data[6] = Convert.ToByte(data[6] & 0x0f | 0x30);
+            //IETF variant
+            data[8] = Convert.ToByte(data[8] & 0x3f | 0x80);
+
+            //example: 069a79f4-44e9-4726-a5be-fca90e38aaf5
+            var striped = Convert.ToHexString(data);
+            var components = new string[] {
+                striped[..].Remove(8),
+                striped[8..].Remove(4),
+                striped[12..].Remove(4),
+                striped[16..].Remove(4),
+                striped[20..]
+            };
+
+            return string.Join('-', components).ToLower();
+        }
+
+        public static string GetPlayerUUID(string username, bool offlineMode)
+        {
+            using var md5 = MD5.Create();
+
+            if (!offlineMode)
+                throw new NotSupportedException("Getting player's online UUID via the Mojang API is not supported at this time.");
+
+            return GetUUID("OfflinePlayer:" + username);
+        }
+    }
+}
diff --git a/Pilz.sln b/Pilz.sln
index c05cbc6..0337e07 100644
--- a/Pilz.sln
+++ b/Pilz.sln
@@ -37,9 +37,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Pilz.UI.Telerik", "Pilz.UI.
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Pilz.Networking.CloudProviders.Nextcloud", "Pilz.Networking.CloudProviders.Nextcloud\Pilz.Networking.CloudProviders.Nextcloud.csproj", "{A91E966B-3A82-4F32-A703-2FC1C7654FD1}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Pilz.Plugins", "Pilz.Plugins\Pilz.Plugins.csproj", "{1170FCA6-192D-42FE-A79F-49EE03035554}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Pilz.Plugins", "Pilz.Plugins\Pilz.Plugins.csproj", "{1170FCA6-192D-42FE-A79F-49EE03035554}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Pilz.Plugins.Advanced", "Pilz.Plugins.Advanced\Pilz.Plugins.Advanced.csproj", "{72153EC8-B297-4A94-80AA-3574544BE8CF}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Pilz.Plugins.Advanced", "Pilz.Plugins.Advanced\Pilz.Plugins.Advanced.csproj", "{72153EC8-B297-4A94-80AA-3574544BE8CF}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Pilz.Gaming.Minecraft", "Pilz.Gaming.Minecraft\Pilz.Gaming.Minecraft.csproj", "{B285DA24-39C9-4BA2-AF3D-A1A05737268B}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -201,6 +203,14 @@ Global
 		{72153EC8-B297-4A94-80AA-3574544BE8CF}.Release|Any CPU.Build.0 = Release|Any CPU
 		{72153EC8-B297-4A94-80AA-3574544BE8CF}.Release|x86.ActiveCfg = Release|Any CPU
 		{72153EC8-B297-4A94-80AA-3574544BE8CF}.Release|x86.Build.0 = Release|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Debug|x86.Build.0 = Debug|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Release|x86.ActiveCfg = Release|Any CPU
+		{B285DA24-39C9-4BA2-AF3D-A1A05737268B}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE