Add JwtService

AMessanger.Application/Services/JwtService.cs

@@ -0,0 +1,38 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+using AMessanger.Application.Settings;
+using AMessanger.Core.Abstraction;
+using AMessanger.Core.Models;
+using Microsoft.Extensions.Options;
+using Microsoft.IdentityModel.Tokens;
+
+namespace AMessanger.Application.Services;
+
+public class JwtService(IOptions<JwtSettings> options) : IJwtService
+{
+    private readonly JwtSettings _settings = options.Value;
+
+    public string GenerateToken(User user)
+    {
+        var claims = new[]
+        {
+            new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
+            new Claim(ClaimTypes.Name, user.Name)
+        };
+
+        var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_settings.Key));
+
+        var creditnails = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
+
+        var token = new JwtSecurityToken(
+            issuer: _settings.Issuer,
+            audience: _settings.Audience,
+            claims: claims,
+            expires: DateTime.UtcNow.AddMinutes(_settings.ExpiresMinutes),
+            signingCredentials: creditnails
+        );
+
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+}