Allowed the Batch Processing assistant to process images (#1087)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Chat/IImageSourceExtensions.cs

@@ -1,3 +1,4 @@
+using AIStudio.Provider;
 using AIStudio.Tools.MIME;
 using AIStudio.Tools.PluginSystem;
 
@@ -6,7 +7,23 @@ namespace AIStudio.Chat;
 public static class IImageSourceExtensions
 {
     private static string TB(string fallbackEN) => I18N.I.T(fallbackEN, typeof(IImageSourceExtensions).Namespace, nameof(IImageSourceExtensions));
-    
+
+    /// <summary>
+    /// The largest image we send to a model. A larger image is skipped by TryAsBase64.
+    /// </summary>
+    public const long MAX_IMAGE_SIZE_BYTES = 10_000_000;
+
+    /// <summary>
+    /// The largest image file, in bytes, which we send through the given provider.
+    /// </summary>
+    /// <remarks>
+    /// The limit of the provider where it states one, but never more than MAX_IMAGE_SIZE_BYTES:
+    /// TryAsBase64 skips every larger image, whatever the provider would accept.
+    /// </remarks>
+    /// <param name="llmProvider">The provider the image is sent through.</param>
+    /// <returns>The size limit of one image file.</returns>
+    public static long MaxImageSizeBytesFor(LLMProviders llmProvider) => Math.Min(llmProvider.GetMaxImageSizeBytes() ?? MAX_IMAGE_SIZE_BYTES, MAX_IMAGE_SIZE_BYTES);
+
     public static MIMEType DetermineMimeType(this IImageSource image)
     {
         switch (image.SourceType)
@@ -97,7 +114,7 @@ public static class IImageSourceExtensions
                 {
                     // Read the length of the content:
                     var lengthBytes = response.Content.Headers.ContentLength;
-                    if(lengthBytes > 10_000_000)
+                    if(lengthBytes > MAX_IMAGE_SIZE_BYTES)
                     {
                         await MessageBus.INSTANCE.SendError(new(Icons.Material.Filled.ImageNotSupported, TB("The image at the URL is too large (>10 MB). Skipping the image.")));
                         return (success: false, string.Empty);
@@ -116,7 +133,7 @@ public static class IImageSourceExtensions
                 {
                     // Read the content length:
                     var length = new FileInfo(image.Source).Length;
-                    if(length > 10_000_000)
+                    if(length > MAX_IMAGE_SIZE_BYTES)
                     {
                         await MessageBus.INSTANCE.SendError(new(Icons.Material.Filled.ImageNotSupported, TB("The local image file is too large (>10 MB). Skipping the image.")));
                         return (success: false, string.Empty);