feat: create chat message

src/AnthropicClient/Models/ImageContent.cs

@@ -0,0 +1,36 @@
+using System.Text.Json.Serialization;
+
+using AnthropicClient.Utils;
+
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents image content that is part of a chat message.
+/// </summary>
+public class ImageContent : Content
+{
+  /// <summary>
+  /// Gets the source of the image.
+  /// </summary>
+  public ImageSource Source { get; init; } = new();
+
+  [JsonConstructor]
+  internal ImageContent()
+  {
+  }
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="ImageContent"/> class.
+  /// </summary>
+  /// <param name="mediaType">The media type of the image.</param>
+  /// <param name="data">The data of the image.</param>
+  /// <exception cref="ArgumentNullException">Thrown when the media type or data is null.</exception>
+  /// <returns>A new instance of the <see cref="ImageContent"/> class.</returns>
+  public ImageContent(string mediaType, string data) : base(ContentType.Image)
+  {
+    ArgumentValidator.ThrowIfNull(mediaType, nameof(mediaType));
+    ArgumentValidator.ThrowIfNull(data, nameof(data));
+
+    Source = new(mediaType, data);
+  }
+}