massive work on user auth

SurveyBackend/SurveyBackend.Infrastructure/AuthOptions.cs

@@ -0,0 +1,32 @@
+using System.Text;
+using Microsoft.Extensions.Configuration;
+using Microsoft.IdentityModel.Tokens;
+
+namespace SurveyBackend.Infrastructure;
+
+public static class AuthOptions
+{
+    public static string Issuer;
+    public static string Audience;
+    public static TimeSpan TokenLifetime;
+    private static string? SecurityKey { get; set; }
+
+    public static SymmetricSecurityKey SymmetricSecurityKey
+    {
+        get
+        {
+            ArgumentNullException.ThrowIfNull(SecurityKey);
+
+            return new SymmetricSecurityKey(Encoding.UTF8.GetBytes(SecurityKey));
+        }
+    }
+
+    public static void MakeOptions(IConfigurationManager configurationManager, string? securityKey = null)
+    {
+        var jwtSettings = configurationManager.GetSection("JwtSettings");
+        Issuer = jwtSettings["Issuer"] ?? "DefaultIssuer";
+        Audience = jwtSettings["Audience"] ?? "DefaultAudience";
+        TokenLifetime = TimeSpan.FromMinutes(int.Parse(jwtSettings["TokenLifetime"] ?? "60"));
+        SecurityKey = securityKey ?? jwtSettings["SecretKey"];
+    }
+}