feat: implement GetMessageBatchResultsAsync method

src/AnthropicClient/Models/CanceledMessageBatchResult.cs

@@ -0,0 +1,14 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a message batch result that was cancelled.
+/// </summary>
+public class CanceledMessageBatchResult : MessageBatchResult
+{
+  /// <summary>
+  /// Initializes a new instance of the <see cref="CanceledMessageBatchResult"/> class.
+  /// </summary>
+  public CanceledMessageBatchResult() : base(MessageBatchResultType.Canceled)
+  {
+  }
+}

src/AnthropicClient/Models/ErroredMessageBatchResult.cs

@@ -0,0 +1,19 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a message batch result that contains an error response.
+/// </summary>
+public class ErroredMessageBatchResult : MessageBatchResult
+{
+  /// <summary>
+  /// Gets the error of the message batch result.
+  /// </summary>
+  public AnthropicError Error { get; init; } = new AnthropicError();
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="ErroredMessageBatchResult"/> class.
+  /// </summary>
+  public ErroredMessageBatchResult() : base(MessageBatchResultType.Errored)
+  {
+  }
+}

src/AnthropicClient/Models/ExpiredMessageBatchResult.cs

@@ -0,0 +1,14 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a message batch result that has expired.
+/// </summary>
+public class ExpiredMessageBatchResult : MessageBatchResult
+{
+  /// <summary>
+  /// Initializes a new instance of the <see cref="ExpiredMessageBatchResult"/> class.
+  /// </summary>
+  public ExpiredMessageBatchResult() : base(MessageBatchResultType.Expired)
+  {
+  }
+}

src/AnthropicClient/Models/MessageBatchResult.cs

@@ -0,0 +1,26 @@
+using AnthropicClient.Utils;
+
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a message batch result.
+/// </summary>
+public abstract class MessageBatchResult
+{
+  /// <summary>
+  /// Gets the type of the message batch result.
+  /// </summary>
+  public string Type { get; init; } = string.Empty;
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="MessageBatchResult"/> class.
+  /// </summary>
+  /// <param name="type">The type of the message batch result.</param>
+  /// <returns>An instance of the <see cref="MessageBatchResult"/> class.</returns>
+  public MessageBatchResult(string type)
+  {
+    ArgumentValidator.ThrowIfNullOrWhitespace(type, nameof(type));
+
+    Type = type;
+  }
+}

src/AnthropicClient/Models/MessageBatchResultItem.cs

@@ -0,0 +1,20 @@
+using System.Text.Json.Serialization;
+
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a message batch result item.
+/// </summary>
+public class MessageBatchResultItem
+{
+  /// <summary>
+  /// Gets the custom ID of the message batch result item.
+  /// </summary>
+  [JsonPropertyName("custom_id")]
+  public string CustomId { get; init; } = string.Empty;
+
+  /// <summary>
+  /// Gets the result of the message batch result item.
+  /// </summary>
+  public MessageBatchResult Result { get; init; } = default!;
+}

src/AnthropicClient/Models/MessageBatchResultType.cs

@@ -0,0 +1,27 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents the types of message batch results.
+/// </summary>
+public static class MessageBatchResultType
+{
+  /// <summary>
+  /// Represents a succeeded message batch result.
+  /// </summary>
+  public const string Succeeded = "succeeded";
+
+  /// <summary>
+  /// Represents an errored message batch result.
+  /// </summary>
+  public const string Errored = "errored";
+
+  /// <summary>
+  /// Represents a canceled message batch result.
+  /// </summary>
+  public const string Canceled = "canceled";
+
+  /// <summary>
+  /// Represents an expired message batch result.
+  /// </summary>
+  public const string Expired = "expired";
+}

src/AnthropicClient/Models/SucceededMessageBatchResult.cs

@@ -0,0 +1,20 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a message batch result that contains a message response.
+/// </summary>
+public class SucceededMessageBatchResult : MessageBatchResult
+{
+  /// <summary>
+  /// Gets the message of the message batch result.
+  /// </summary>
+  public MessageResponse Message { get; init; } = new MessageResponse();
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="SucceededMessageBatchResult"/> class.
+  /// </summary>
+  /// <returns>An instance of the <see cref="SucceededMessageBatchResult"/> class.</returns>
+  public SucceededMessageBatchResult() : base(MessageBatchResultType.Succeeded)
+  {
+  }
+}