resemble the metadata struct from the rust api

app/MindWork AI Studio/Settings/DataModel/SseEvent.cs

@@ -0,0 +1,92 @@
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Settings.DataModel;
+
+public class SseEvent
+{
+    [JsonPropertyName("content")] 
+    public string Content { get; set; }
+
+    [JsonPropertyName("metadata")] 
+    public Metadata Metadata { get; set; }
+}
+
+[JsonConverter(typeof(MetadataJsonConverter))]
+public abstract class Metadata;
+
+public class TextMetadata : Metadata
+{
+    [JsonPropertyName("Text")]
+    public TextDetails Text { get; set; }
+}
+
+public class TextDetails
+{
+    [JsonPropertyName("line_number")]
+    public int LineNumber { get; set; }
+}
+
+public class PdfMetadata : Metadata
+{
+    [JsonPropertyName("Pdf")] 
+    public PdfDetails Pdf { get; set; }
+}
+
+public class PdfDetails
+{
+    [JsonPropertyName("page_number")] 
+    public int PageNumber { get; set; }
+}
+
+public class SpreadsheetMetadata : Metadata
+{
+    [JsonPropertyName("Spreadsheet")] 
+    public SpreadsheetDetails Spreadsheet { get; set; }
+}
+
+public class SpreadsheetDetails
+{
+    [JsonPropertyName("sheet_name")] 
+    public string SheetName { get; set; }
+
+    [JsonPropertyName("row_number")] 
+    public int RowNumber { get; set; }
+}
+
+public class DocumentMetadata : Metadata {}
+
+public class PresentationMetadata : Metadata
+{
+    [JsonPropertyName("Presentation")] 
+    public PresentationDetails Presentation { get; set; }
+}
+
+public class PresentationDetails
+{
+    [JsonPropertyName("slide_number")] 
+    public int SlideNumber { get; set; }
+
+    [JsonPropertyName("image")] 
+    public ImageData Image { get; set; }
+}
+
+public class ImageMetadata : Metadata
+{
+    [JsonPropertyName("Image")] 
+    public object Image { get; set; }
+}
+
+public class ImageData
+{
+    [JsonPropertyName("id")] 
+    public string Id { get; set; }
+
+    [JsonPropertyName("content")] 
+    public string Content { get; set; }
+
+    [JsonPropertyName("segment")] 
+    public int Segment { get; set; }
+
+    [JsonPropertyName("is_end")] 
+    public bool IsEnd { get; set; }
+}