feat: Add specialized client implementations for PDF operations

DocumentService.Client/Clients/PdfValidationClient.cs

@@ -0,0 +1,68 @@
+using DocumentService.Client.Interfaces;
+using DocumentService.Client.Models.Requests;
+using Microsoft.Extensions.Logging;
+using System.Net.Http;
+
+namespace DocumentService.Client.Clients;
+
+/// <summary>
+/// Implementation of PDF validation client.
+/// </summary>
+public class PdfValidationClient(HttpClient httpClient, ILogger<PdfValidationClient> logger) : BaseDocumentClient(httpClient, logger), IPdfValidationClient
+{
+    /// <inheritdoc />
+    public async Task<PdfValidationResult> ValidatePdfAsync(Stream pdfStream, CancellationToken cancellationToken = default)
+    {
+        var result = await SendMultipartAsync<PdfValidationResult>(
+            "/api/pdf/validation/validate",
+            pdfStream,
+            "document.pdf",
+            cancellationToken);
+
+        return result ?? throw new InvalidOperationException("API returned null response");
+    }
+
+    /// <inheritdoc />
+    public async Task<PdfValidationResult> ValidatePdfAsync(byte[] pdfBytes, CancellationToken cancellationToken = default)
+    {
+        var request = new ValidatePdfBase64Request
+        {
+            Base64Pdf = ToBase64(pdfBytes)
+        };
+
+        var result = await SendJsonAsync<ValidatePdfBase64Request, PdfValidationResult>(
+            "/api/pdf/validation/validate",
+            request,
+            cancellationToken);
+
+        return result ?? throw new InvalidOperationException("API returned null response");
+    }
+
+    /// <inheritdoc />
+    public async Task<PdfAValidationResult> ValidatePdfAAsync(Stream pdfStream, CancellationToken cancellationToken = default)
+    {
+        var result = await SendMultipartAsync<PdfAValidationResult>(
+            "/api/pdf/validation/validate-pdfa",
+            pdfStream,
+            "document.pdf",
+            cancellationToken);
+
+        return result ?? throw new InvalidOperationException("API returned null response");
+    }
+
+    /// <inheritdoc />
+    public async Task<PdfAValidationResult> ValidatePdfAAsync(byte[] pdfBytes, CancellationToken cancellationToken = default)
+    {
+        var request = new ValidatePdfABase64Request
+        {
+            Base64Pdf = ToBase64(pdfBytes)
+        };
+
+        var result = await SendJsonAsync<ValidatePdfABase64Request, PdfAValidationResult>(
+            "/api/pdf/validation/validate-pdfa",
+            request,
+            cancellationToken);
+
+        return result ?? throw new InvalidOperationException("API returned null response");
+    }
+}