From 0e9bb04b96025aafe9ed32e1de46cae0c902eae8 Mon Sep 17 00:00:00 2001
From: Polianin Nikita <nikitkapolyanin@yandex.ru>
Date: Tue, 28 May 2024 06:56:25 +0300
Subject: [PATCH] feat: add setup token

---
 Endpoint/Common/Interfaces/ISetupToken.cs     |  9 ++++++
 .../General/SetupTokenService.cs              | 28 +++++++++++++++++++
 Endpoint/Program.cs                           |  2 ++
 3 files changed, 39 insertions(+)
 create mode 100644 Endpoint/Common/Interfaces/ISetupToken.cs
 create mode 100644 Endpoint/Configuration/General/SetupTokenService.cs

diff --git a/Endpoint/Common/Interfaces/ISetupToken.cs b/Endpoint/Common/Interfaces/ISetupToken.cs
new file mode 100644
index 0000000..462b759
--- /dev/null
+++ b/Endpoint/Common/Interfaces/ISetupToken.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace Mirea.Api.Endpoint.Common.Interfaces;
+
+public interface ISetupToken
+{
+    bool MatchToken(ReadOnlySpan<byte> token);
+    void SetToken(ReadOnlySpan<byte> token);
+}
\ No newline at end of file
diff --git a/Endpoint/Configuration/General/SetupTokenService.cs b/Endpoint/Configuration/General/SetupTokenService.cs
new file mode 100644
index 0000000..4cc1216
--- /dev/null
+++ b/Endpoint/Configuration/General/SetupTokenService.cs
@@ -0,0 +1,28 @@
+using Mirea.Api.Endpoint.Common.Interfaces;
+using System;
+
+namespace Mirea.Api.Endpoint.Configuration.General;
+
+public class SetupTokenService : ISetupToken
+{
+    public ReadOnlyMemory<byte>? Token { get; private set; }
+
+    public bool MatchToken(ReadOnlySpan<byte> token)
+    {
+        if (Token == null || token.Length != Token.Value.Length)
+            return false;
+
+        var token2 = Token.Value.Span;
+
+        int result = 0;
+        for (int i = 0; i < Token.Value.Length; i++)
+            result |= token2[i] ^ token[i];
+
+        return result == 0;
+    }
+
+    public void SetToken(ReadOnlySpan<byte> token)
+    {
+        Token = token.ToArray();
+    }
+}
\ No newline at end of file
diff --git a/Endpoint/Program.cs b/Endpoint/Program.cs
index 7101c7e..4d79328 100644
--- a/Endpoint/Program.cs
+++ b/Endpoint/Program.cs
@@ -8,6 +8,7 @@ using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Options;
 using Mirea.Api.DataAccess.Application;
 using Mirea.Api.DataAccess.Persistence;
+using Mirea.Api.Endpoint.Common.Interfaces;
 using Mirea.Api.Endpoint.Common.Services;
 using Mirea.Api.Endpoint.Configuration;
 using Mirea.Api.Endpoint.Configuration.General;
@@ -50,6 +51,7 @@ public class Program
         builder.Services.AddPersistence(builder.Configuration.Get<GeneralConfig>()?.DbSettings?.ConnectionStringSql ?? string.Empty);
         builder.Services.AddControllers();
 
+        builder.Services.AddSingleton<ISetupToken, SetupTokenService>();
         builder.Services.AddCors(options =>
         {
             options.AddPolicy("AllowAll", policy =>