feat: add support for file source and url source

src/AnthropicClient/Json/SourceConverter.cs

@@ -16,6 +16,8 @@ class SourceConverter : JsonConverter<Source>
     {
       SourceType.Text => JsonSerializer.Deserialize<TextSource>(root.GetRawText(), options)!,
       SourceType.Content => JsonSerializer.Deserialize<CustomSource>(root.GetRawText(), options)!,
+      SourceType.File => JsonSerializer.Deserialize<FileSource>(root.GetRawText(), options)!,
+      SourceType.Url => JsonSerializer.Deserialize<UrlSource>(root.GetRawText(), options)!,
       SourceType.Base64 => DeserializeBase64Source(root, options),
       _ => throw new JsonException($"Unknown source type: {type}")
     };
@@ -54,6 +56,18 @@ class SourceConverter : JsonConverter<Source>
       return;
     }
 
+    if (value is FileSource fileSource)
+    {
+      JsonSerializer.Serialize(writer, fileSource, options);
+      return;
+    }
+
+    if (value is UrlSource urlSource)
+    {
+      JsonSerializer.Serialize(writer, urlSource, options);
+      return;
+    }
+
     JsonSerializer.Serialize(writer, value, value.GetType(), options);
   }
 }

src/AnthropicClient/Models/FileSource.cs

@@ -0,0 +1,33 @@
+using System.Text.Json.Serialization;
+
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a file source in the Anthropic API.
+/// </summary>
+public class FileSource : Source
+{
+  /// <summary>
+  /// Gets or sets the unique identifier for the file source.
+  /// </summary>
+  [JsonPropertyName("file_id")]
+  public string Id { get; init; } = string.Empty;
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="FileSource"/> class.
+  /// </summary>
+  /// <returns>A new instance of <see cref="FileSource"/> with the type set to "file".</returns>
+  public FileSource() : base(SourceType.File)
+  {
+  }
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="FileSource"/> class with a specified file ID.
+  /// </summary>
+  /// <param name="id">The unique identifier for the file source.</param>
+  /// <returns>A new instance of <see cref="FileSource"/>.</returns>
+  public FileSource(string id) : base(SourceType.File)
+  {
+    Id = id;
+  }
+}

src/AnthropicClient/Models/ImageContent.cs

@@ -53,4 +53,32 @@ public class ImageContent : Content
 
     Source = new ImageSource(mediaType, data);
   }
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="ImageContent"/> class.
+  /// </summary>
+  /// <param name="source">The source of the image.</param>
+  /// <returns>A new instance of the <see cref="ImageContent"/> class.</returns>
+  /// <exception cref="ArgumentNullException">Thrown when the source is null.</exception>
+  public ImageContent(Source source) : base(ContentType.Image)
+  {
+    ArgumentValidator.ThrowIfNull(source, nameof(source));
+
+    Source = source;
+  }
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="ImageContent"/> class.
+  /// </summary>
+  /// <param name="source">The source of the image.</param>
+  /// <param name="cacheControl">The cache control to be used for the content.</param>
+  /// <returns>A new instance of the <see cref="ImageContent"/> class.</returns>
+  /// <exception cref="ArgumentNullException">Thrown when the source or cache control is null.</exception>
+  public ImageContent(Source source, CacheControl cacheControl) : base(ContentType.Image, cacheControl)
+  {
+    ArgumentValidator.ThrowIfNull(source, nameof(source));
+    ArgumentValidator.ThrowIfNull(cacheControl, nameof(cacheControl));
+
+    Source = source;
+  }
 }

src/AnthropicClient/Models/SourceType.cs

@@ -19,4 +19,14 @@ public static class SourceType
   /// The text document source type.
   /// </summary>
   public const string Text = "text";
+
+  /// <summary>
+  /// The file document source type.
+  /// </summary>
+  public const string File = "file";
+
+  /// <summary>
+  /// The URL document source type.
+  /// </summary>
+  public const string Url = "url";
 }

src/AnthropicClient/Models/UrlSource.cs

@@ -0,0 +1,30 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a URL source in the Anthropic API.
+/// </summary>
+public class UrlSource : Source
+{
+  /// <summary>
+  /// Gets or sets the URL of the source document.
+  /// </summary>
+  public string Url { get; init; } = string.Empty;
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="UrlSource"/> class.
+  /// </summary>
+  /// <returns>A new instance of <see cref="UrlSource"/> with the type set to "url".</returns>
+  public UrlSource() : base(SourceType.Url)
+  {
+  }
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="UrlSource"/> class with a specified URL.
+  /// </summary>
+  /// <param name="url">The URL of the source document.</param>
+  /// <returns>A new instance of <see cref="UrlSource"/>.</returns>
+  public UrlSource(string url) : base(SourceType.Url)
+  {
+    Url = url;
+  }
+}