refactor: move services and AITools to MoneyMap.Core

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-04-20 18:18:20 -04:00
parent 3deca29f05
commit 3b01efd8a6
27 changed files with 10 additions and 5 deletions
@@ -0,0 +1,61 @@
+using ImageMagick;
+
+namespace MoneyMap.Services
+{
+    /// <summary>
+    /// Service for converting PDF files to images for AI processing.
+    /// </summary>
+    public interface IPdfToImageConverter
+    {
+        /// <summary>
+        /// Converts the first page of a PDF to a base64-encoded PNG image.
+        /// </summary>
+        Task<string> ConvertFirstPageToBase64Async(string pdfPath);
+
+        /// <summary>
+        /// Converts PDF bytes to a base64-encoded PNG image.
+        /// </summary>
+        Task<string> ConvertFirstPageToBase64Async(byte[] pdfBytes);
+    }
+
+    public class PdfToImageConverter : IPdfToImageConverter
+    {
+        private const int DefaultDpi = 220;
+
+        public Task<string> ConvertFirstPageToBase64Async(string pdfPath)
+        {
+            var pdfBytes = File.ReadAllBytes(pdfPath);
+            return ConvertFirstPageToBase64Async(pdfBytes);
+        }
+
+        public Task<string> ConvertFirstPageToBase64Async(byte[] pdfBytes)
+        {
+            return Task.Run(() =>
+            {
+                var settings = new MagickReadSettings
+                {
+                    Density = new Density(DefaultDpi),
+                    BackgroundColor = MagickColors.White,
+                    ColorSpace = ColorSpace.sRGB
+                };
+
+                using var pages = new MagickImageCollection();
+                pages.Read(pdfBytes, settings);
+
+                if (pages.Count == 0)
+                    throw new InvalidOperationException("PDF has no pages");
+
+                using var img = (MagickImage)pages[0].Clone();
+
+                // Ensure we have a clean 8-bit RGB canvas
+                img.ColorType = ColorType.TrueColor;
+                img.Alpha(AlphaOption.Remove); // flatten onto white
+                img.ResetPage();
+
+                // Convert to PNG bytes
+                var imageBytes = img.ToByteArray(MagickFormat.Png);
+                return Convert.ToBase64String(imageBytes);
+            });
+        }
+    }
+}