Changes

api/Services/Rag/PdfTextExtractor.cs

@@ -0,0 +1,33 @@
+using System.Text;
+using UglyToad.PdfPig;
+
+namespace Api.Services.Rag;
+
+public interface IPdfTextExtractor
+{
+    string ExtractText(Stream pdfStream);
+}
+
+public sealed class PdfTextExtractor : IPdfTextExtractor
+{
+    public string ExtractText(Stream pdfStream)
+    {
+        using var document = PdfDocument.Open(pdfStream);
+        var builder = new StringBuilder();
+
+        foreach (var page in document.GetPages())
+        {
+            builder.AppendLine(page.Text);
+            builder.AppendLine();
+        }
+
+        return NormalizeWhitespace(builder.ToString());
+    }
+
+    private static string NormalizeWhitespace(string value)
+    {
+        if (string.IsNullOrWhiteSpace(value)) return string.Empty;
+        var parts = value.Split((char[]?)null, StringSplitOptions.RemoveEmptyEntries);
+        return string.Join(' ', parts).Trim();
+    }
+}