Add JwtService

AMessanger.Application/ApplicationExtensions.cs

@@ -1,4 +1,5 @@
 using System.Text;
+using AMessanger.Application.Settings;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -10,6 +11,10 @@ public static class ApplicationExtensions
 {
     public static IServiceCollection AddAuth(this IServiceCollection services, IConfiguration configuration)
     {
+        var jwtConf = configuration.GetSection(JwtSettings.SECTION_NAME);
+        services.Configure<JwtSettings>(jwtConf);
+        var settings = jwtConf.Get<JwtSettings>()!;
+
         services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
             .AddJwtBearer(options =>
             {
@@ -20,10 +25,10 @@ public static class ApplicationExtensions
                     ValidateLifetime = true,
                     ValidateIssuerSigningKey = true,
 
-                    ValidIssuer = configuration["Jwt:Issuer"],
-                    ValidAudience = configuration["Jwt:Audience"],
+                    ValidIssuer = settings.Issuer,
+                    ValidAudience = settings.Audience,
                     IssuerSigningKey = new SymmetricSecurityKey(
-                        Encoding.UTF8.GetBytes(configuration["Jwt:Key"]!)
+                        Encoding.UTF8.GetBytes(settings.Key)
                     )
                 };
             });

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);
+    }
+}

AMessanger.Application/Settings/JwtSettings.cs

@@ -0,0 +1,11 @@
+namespace AMessanger.Application.Settings;
+
+public class JwtSettings
+{
+    public const string SECTION_NAME = "Jwt";
+
+    public string Issuer { get; set; } = null!;
+    public string Audience { get; set; } = null!;
+    public int ExpiresMinutes { get; set; }
+    public string Key { get; set; } = null!;
+}