Add missing overloads for three button interactive replies

src/WhatsApp/MessageExtensions.cs

@@ -120,10 +120,10 @@ public static TextResponse Reply(this IMessage message, string text)
     /// <summary>
     /// Creates a text response with buttons for the message.
     /// </summary>
-    public static TextResponse Reply(this IMessage message, string text, Button button1, Button? button2 = default)
+    public static TextResponse Reply(this IMessage message, string text, Button button1, Button? button2 = default, Button? button3 = default)
         => message is UserMessage user
-            ? new(user.Service, message.UserNumber, message.Id, message.ConversationId, text, button1, button2)
-            : new(message.ServiceId, message.UserNumber, message.Id, message.ConversationId, text, button1, button2);
+            ? new(user.Service, message.UserNumber, message.Id, message.ConversationId, text, button1, button2, button3)
+            : new(message.ServiceId, message.UserNumber, message.Id, message.ConversationId, text, button1, button2, button3);
 
     /// <summary>
     /// Attempts to retrieve a single message from the specified collection.

src/WhatsApp/TextResponse.cs

@@ -11,14 +11,14 @@
 /// <param name="Text">The text content of the response message.</param>
 /// <param name="Button1">An optional button to include in the response for user interaction.</param>
 /// <param name="Button2">An optional second button to include in the response for user interaction.</param>
-public record TextResponse(string ServiceId, string UserNumber, string Context, string? ConversationId, string Text, Button? Button1 = default, Button? Button2 = default) : Response(ServiceId, UserNumber, Context, ConversationId)
+public record TextResponse(string ServiceId, string UserNumber, string Context, string? ConversationId, string Text, Button? Button1 = default, Button? Button2 = default, Button? Button3 = default) : Response(ServiceId, UserNumber, Context, ConversationId)
 {
     // If this variable is not null, it means the originating message came from WhatsApp
     // and there's an ongoing conversation with the CLI simultaneously.
     readonly CompositeService? service;
 
-    internal TextResponse(Service service, string userNumber, string context, string? conversationId, string text, Button? button1 = default, Button? button2 = default)
-        : this(service.Id, userNumber, context, conversationId, text, button1, button2)
+    internal TextResponse(Service service, string userNumber, string context, string? conversationId, string text, Button? button1 = default, Button? button2 = default, Button? button3 = default)
+        : this(service.Id, userNumber, context, conversationId, text, button1, button2, button3)
         => this.service = service as CompositeService;
 
     /// <inheritdoc/>
@@ -45,8 +45,10 @@ internal TextResponse(Service service, string userNumber, string context, string
         {
             if (Button2 == null)
                 return client.ReplyAsync(serviceId, UserNumber, Context, text, Button1, cancellation);
-            else
+            else if (Button3 == null)
                 return client.ReplyAsync(serviceId, UserNumber, Context, text, Button1, Button2, cancellation);
+            else
+                return client.ReplyAsync(serviceId, UserNumber, Context, text, Button1, Button2, Button3, cancellation);
         }
         else
         {

src/WhatsApp/WhatsAppClientExtensions.cs

@@ -211,6 +211,51 @@ public static Task SendTemplateAsync(this IWhatsAppClient client, string service
             }
         }, cancellation);
 
+    /// <summary>
+    /// Replies to a user message with a additional interactive buttons.
+    /// </summary>
+    /// <param name="client">The WhatsApp client.</param>
+    /// <param name="serviceId">The service number to send through.</param>
+    /// <param name="userNumber">The user phone number to send to.</param>
+    /// <param name="reply">The text message to respond with.</param>
+    /// <param name="replyTo">The message to reply to.</param>
+    /// <param name="button1">Interactive button for a user choice.</param>
+    /// <param name="button2">Interactive button for a user choice.</param>
+    /// <param name="button3">Interactive button for a user choice.</param>
+    /// <param name="cancellation">The cancellation token.</param>
+    /// <returns>The identifier of the reply message.</returns>
+    /// <see cref="https://developers.facebook.com/docs/whatsapp/cloud-api/reference/messages/#interactive-object"/>
+    public static Task<string?> ReplyAsync(this IWhatsAppClient client, string serviceId, string userNumber, string replyTo, string reply, Button button1, Button button2, Button button3, CancellationToken cancellation = default)
+        => client.SendAsync(serviceId, new
+        {
+            messaging_product = "whatsapp",
+            preview_url = false,
+            recipient_type = "individual",
+            to = NormalizeNumber(userNumber),
+            type = "interactive",
+            context = new
+            {
+                message_id = replyTo
+            },
+            interactive = new
+            {
+                type = "button",
+                body = new
+                {
+                    text = reply
+                },
+                action = new
+                {
+                    buttons = new[]
+                    {
+                        new { type = "reply", reply = new { id = button1.Id, title = button1.Title } },
+                        new { type = "reply", reply = new { id = button2.Id, title = button2.Title } },
+                        new { type = "reply", reply = new { id = button3.Id, title = button3.Title } },
+                    }
+                }
+            }
+        }, cancellation);
+
     /// <summary>
     /// Replies to a user message with a additional interactive buttons.
     /// </summary>