[Feature] Add purchase notification (#2942)

Author: Misha-133

src/Discord.Net.Core/Entities/Messages/GuildProductPurchase.cs

@@ -0,0 +1,23 @@
+namespace Discord;
+
+/// <summary>
+///     Represents a guild product purchase.
+/// </summary>
+public readonly struct GuildProductPurchase
+{
+    /// <summary>
+    ///     Gets the ID of the listing.
+    /// </summary>
+    public readonly ulong ListingId;
+
+    /// <summary>
+    ///    Gets the name of the product.
+    /// </summary>
+    public readonly string ProductName;
+
+    internal GuildProductPurchase(ulong listingId, string productName)
+    {
+        ListingId = listingId;
+        ProductName = productName;
+    }
+}

src/Discord.Net.Core/Entities/Messages/IMessage.cs

@@ -226,6 +226,11 @@ public interface IMessage : ISnowflakeEntity, IDeletable
         /// </returns>
         MessageRoleSubscriptionData RoleSubscriptionData { get; }
 
+        /// <summary>
+        ///     Gets the purchase notification for this message.
+        /// </summary>
+        PurchaseNotification PurchaseNotification { get; }
+        
         /// <summary>
         ///     Gets the call data of the message.
         /// </summary>

src/Discord.Net.Core/Entities/Messages/PurchaseNotification.cs

@@ -0,0 +1,23 @@
+namespace Discord;
+
+/// <summary>
+///     Represents a purchase notification.
+/// </summary>
+public readonly struct PurchaseNotification
+{
+    /// <summary>
+    ///     Gets the type of the purchase.
+    /// </summary>
+    public readonly PurchaseType Type;
+
+    /// <summary>
+    ///     Gets the purchased product.
+    /// </summary>
+    public readonly GuildProductPurchase? ProductPurchase;
+
+    internal PurchaseNotification(PurchaseType type, GuildProductPurchase? productPurchase)
+    {
+        Type = type;
+        ProductPurchase = productPurchase;
+    }
+}

src/Discord.Net.Core/Entities/Messages/PurchaseType.cs

@@ -0,0 +1,12 @@
+namespace Discord;
+
+/// <summary>
+///     Represents the type of purchase notification.
+/// </summary>
+public enum PurchaseType
+{
+    /// <summary>
+    ///     A guild product purchase.
+    /// </summary>
+    GuildProduct = 0
+}

src/Discord.Net.Rest/API/Common/GuildProductPurchase.cs

@@ -0,0 +1,12 @@
+using Newtonsoft.Json;
+
+namespace Discord.API;
+
+internal class GuildProductPurchase
+{
+    [JsonProperty("listing_id")]
+    public ulong ListingId { get; set; }
+
+    [JsonProperty("product_name")]
+    public string ProductName { get; set; }
+}

src/Discord.Net.Rest/API/Common/Message.cs

@@ -105,6 +105,9 @@ internal class Message
     [JsonProperty("poll")]
     public Optional<Poll> Poll { get; set; }
 
+    [JsonProperty("purchase_notification")]
+    public Optional<MessagePurchaseNotification> PurchaseNotification { get; set; }
+  
     [JsonProperty("call")]
     public Optional<MessageCallData> Call { get; set; }
 }

src/Discord.Net.Rest/API/Common/MessagePurchaseNotification.cs

@@ -0,0 +1,12 @@
+using Newtonsoft.Json;
+
+namespace Discord.API;
+
+internal class MessagePurchaseNotification
+{
+    [JsonProperty("type")]
+    public PurchaseType Type { get; set; }
+
+    [JsonProperty("guild_product_purchase")]
+    public Optional<GuildProductPurchase> ProductPurchase { get; set; }
+}

src/Discord.Net.Rest/Entities/Messages/RestMessage.cs

@@ -93,6 +93,9 @@ public abstract class RestMessage : RestEntity<ulong>, IMessage, IUpdateable
         /// <inheritdoc />
         public MessageRoleSubscriptionData RoleSubscriptionData { get; private set; }
 
+        /// <inheritdoc />
+        public PurchaseNotification PurchaseNotification { get; private set; }
+        
         /// <inheritdoc />
         public MessageCallData? CallData { get; private set; }
 
@@ -276,9 +279,18 @@ internal virtual void Update(Model model)
             if (model.Thread.IsSpecified)
                 Thread = RestThreadChannel.Create(Discord, new RestGuild(Discord, model.Thread.Value.GuildId.Value), model.Thread.Value);
 
+            if (model.PurchaseNotification.IsSpecified)
+            {
+                PurchaseNotification = new PurchaseNotification(model.PurchaseNotification.Value.Type,
+                    model.PurchaseNotification.Value.ProductPurchase.IsSpecified
+                        ? new GuildProductPurchase(model.PurchaseNotification.Value.ProductPurchase.Value.ListingId, model.PurchaseNotification.Value.ProductPurchase.Value.ProductName)
+                        : null);
+            }
+            
             if (model.Call.IsSpecified)
                 CallData = new MessageCallData(model.Call.Value.Participants, model.Call.Value.EndedTimestamp.ToNullable());
         }
+        
         /// <inheritdoc />
         public async Task UpdateAsync(RequestOptions options = null)
         {

src/Discord.Net.WebSocket/Entities/Messages/SocketMessage.cs

@@ -81,6 +81,9 @@ public abstract class SocketMessage : SocketEntity<ulong>, IMessage
         /// <inheritdoc />
         public MessageRoleSubscriptionData RoleSubscriptionData { get; private set; }
 
+        /// <inheritdoc />
+        public PurchaseNotification PurchaseNotification { get; private set; }
+
         /// <inheritdoc cref="IMessage.Thread"/>
         public SocketThreadChannel Thread { get; private set; }
 
@@ -303,6 +306,14 @@ internal virtual void Update(ClientState state, Model model)
                 Thread = guild?.AddOrUpdateChannel(state, model.Thread.Value) as SocketThreadChannel;
             }
 
+            if (model.PurchaseNotification.IsSpecified)
+            {
+                PurchaseNotification = new PurchaseNotification(model.PurchaseNotification.Value.Type,
+                    model.PurchaseNotification.Value.ProductPurchase.IsSpecified
+                        ? new GuildProductPurchase(model.PurchaseNotification.Value.ProductPurchase.Value.ListingId, model.PurchaseNotification.Value.ProductPurchase.Value.ProductName)
+                        : null);
+            }
+            
             if (model.Call.IsSpecified)
                 CallData = new MessageCallData(model.Call.Value.Participants, model.Call.Value.EndedTimestamp.ToNullable());
         }