Sla (#11)

Co-authored-by: gorbenko.pavel <gorbenko.pavel@tansu.kz> Reviewed-on: http://git.tnsu.kz/gorbenko.pavel/tnsu-approval-route/pulls/11
2026-08-13 04:44:08 +00:00
parent 7f2aabbf29
commit d076f4e98d
103 changed files with 2606 additions and 1265 deletions
@@ -0,0 +1,42 @@
+using System.Net.Http.Json;
+using System.Text.Json.Serialization;
+using Microsoft.Extensions.Options;
+
+namespace Tnsu.ApprovalRoute.Infrastructure.TnsuPortal;
+
+public sealed class TnsuPortalTokenProvider(HttpClient httpClient, IOptions<TnsuPortalOptions> options)
+{
+    private string? _cachedToken;
+    private DateTimeOffset _expiresAt = DateTimeOffset.MinValue;
+
+    public async Task<string> GetAccessTokenAsync(CancellationToken cancellationToken)
+    {
+        if (_cachedToken is not null && DateTimeOffset.UtcNow < _expiresAt)
+            return _cachedToken;
+
+        var opts = options.Value;
+        var response = await httpClient.PostAsync(
+            $"https://login.microsoftonline.com/{opts.TenantId}/oauth2/v2.0/token",
+            new FormUrlEncodedContent(new Dictionary<string, string>
+            {
+                ["grant_type"] = "client_credentials",
+                ["client_id"] = opts.ClientId,
+                ["client_secret"] = opts.ClientSecret,
+                ["scope"] = opts.Scope
+            }),
+            cancellationToken);
+        response.EnsureSuccessStatusCode();
+
+        var payload = await response.Content.ReadFromJsonAsync<TokenResponse>(cancellationToken)
+            ?? throw new InvalidOperationException("Не удалось получить токен для api.tnsu.kz.");
+
+        _cachedToken = payload.AccessToken;
+        _expiresAt = DateTimeOffset.UtcNow.AddSeconds(payload.ExpiresIn - 60);
+
+        return _cachedToken;
+    }
+
+    private sealed record TokenResponse(
+        [property: JsonPropertyName("access_token")] string AccessToken,
+        [property: JsonPropertyName("expires_in")] int ExpiresIn);
+}