From c51e02fa05bc3f60fccf6f5a1458e8be6750e381 Mon Sep 17 00:00:00 2001
From: ProfessionalUwU <andre.fuhry@hopeless-cloud.xyz>
Date: Sun, 25 Jun 2023 21:12:42 +0200
Subject: [PATCH] Add library Embed the library into the executable and extract
 at runtime Cleanup after executing the program

---
 .gitignore               |  1 +
 src/Chksum/Chksum.csproj |  1 +
 src/Chksum/Program.cs    |  4 ++++
 src/Chksum/chksum.cs     | 22 +++++++++++++++++++++-
 4 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index e68f0aa..7576ac2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .vscode/
 obj/
 bin/
+Libraries/
diff --git a/src/Chksum/Chksum.csproj b/src/Chksum/Chksum.csproj
index 6db87ee..fc84e00 100644
--- a/src/Chksum/Chksum.csproj
+++ b/src/Chksum/Chksum.csproj
@@ -2,6 +2,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Chksum.Tests\Chksum.Tests.csproj" />
+    <EmbeddedResource Include="Libraries/libe_sqlite3.so" />
   </ItemGroup>
 
   <PropertyGroup>
diff --git a/src/Chksum/Program.cs b/src/Chksum/Program.cs
index 67459a6..dde1d7c 100644
--- a/src/Chksum/Program.cs
+++ b/src/Chksum/Program.cs
@@ -17,6 +17,8 @@ public class Program {
 
         utils.getBaseDir();
 
+        utils.ExtractEmbeddedLibrary();
+
         Console.ForegroundColor = ConsoleColor.Green;
         switch (args[0]) {
             case "checksum":
@@ -64,6 +66,8 @@ public class Program {
                 PrintAvailableOptions();
                 break;
         }
+
+        utils.cleanup();
     }
 
     static void PrintAvailableOptions() {
diff --git a/src/Chksum/chksum.cs b/src/Chksum/chksum.cs
index 9cf007e..dfc5c07 100644
--- a/src/Chksum/chksum.cs
+++ b/src/Chksum/chksum.cs
@@ -1,3 +1,4 @@
+using System.Reflection;
 using Microsoft.Data.Sqlite;
 namespace Chksum.Utils;
 public class ChksumUtils {
@@ -17,11 +18,30 @@ public class ChksumUtils {
     //     return parentFolder;
     // }
 
-    public string DatabaseRoot { get; set; }
+    public string DatabaseRoot { get; set; } = string.Empty;
     public void getBaseDir() {
         DatabaseRoot = AppDomain.CurrentDomain.BaseDirectory;
     }
 
+    public string libraryPath { get; set; } = string.Empty;
+    public void ExtractEmbeddedLibrary() {
+        libraryPath = Path.Combine(DatabaseRoot, "libe_sqlite3.so");
+
+        using (Stream? resourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("Chksum.Libraries.libe_sqlite3.so")) {
+            if (resourceStream != null) {
+                byte[] buffer = new byte[resourceStream.Length];
+                resourceStream.Read(buffer, 0, buffer.Length);
+                File.WriteAllBytes(libraryPath, buffer);
+            } else {
+                throw new Exception(libraryPath + " could not be loaded");
+            }
+        }
+    }
+
+    public void cleanup() {
+        File.Delete(libraryPath);
+    }
+
     public void initializeDB() {
         if (!File.Exists("chksum.db")) {
             using (var connection = new SqliteConnection("Data Source=chksum.db")) {