feat: wip on sending welcome message

src/StevesBot.Worker/Discord/Events/DiscordEventConverter.cs

@@ -36,6 +36,7 @@ internal sealed class DiscordEventConverter : JsonConverter<DiscordEvent>
     return type switch
     {
       DiscordEventTypes.Ready => JsonSerializer.Deserialize<ReadyDiscordEvent>(root.GetRawText(), options),
+      DiscordEventTypes.MessageCreate => JsonSerializer.Deserialize<MessageCreateDiscordEvent>(root.GetRawText(), options),
       _ => JsonSerializer.Deserialize<DispatchDiscordEvent>(root.GetRawText(), modifiedOptions),
     };
   }

src/StevesBot.Worker/Discord/Events/DiscordEventTypes.cs

@@ -3,6 +3,8 @@ namespace StevesBot.Worker.Discord.Events;
 internal static class DiscordEventTypes
 {
   public const string Ready = "READY";
+  public const string GuildMemberAdd = "GUILD_MEMBER_ADD";
+  public const string MessageCreate = "MESSAGE_CREATE";
 
   public static bool IsValidEvent(string eventName)
   {
@@ -11,6 +13,8 @@ internal static class DiscordEventTypes
       return false;
     }
 
-    return eventName is Ready;
+    return eventName is Ready or
+      GuildMemberAdd or
+      MessageCreate;
   }
 }

src/StevesBot.Worker/Discord/Events/DiscordMessageTypes.cs

@@ -0,0 +1,6 @@
+namespace StevesBot.Worker.Discord.Events;
+
+internal static class DiscordMessageTypes
+{
+  public const int UserJoin = 7;
+}

src/StevesBot.Worker/Discord/Events/MessageCreateDiscordEvent.cs

@@ -0,0 +1,37 @@
+namespace StevesBot.Worker.Discord.Events;
+
+internal sealed record MessageCreateDiscordEvent : DispatchDiscordEvent
+{
+  [JsonPropertyName("d")]
+  public new MessageCreateData Data { get; init; } = new MessageCreateData();
+
+  public bool IsMessageType(int messageType)
+  {
+    return Data.Type == messageType;
+  }
+}
+
+internal sealed record MessageCreateData
+{
+  [JsonPropertyName("id")]
+  public string Id { get; init; } = string.Empty;
+
+  [JsonPropertyName("type")]
+  public int Type { get; init; }
+
+  [JsonPropertyName("channel_id")]
+  public string ChannelId { get; init; } = string.Empty;
+
+  [JsonPropertyName("guild_id")]
+  public string GuildId { get; init; } = string.Empty;
+
+  [JsonPropertyName("author")]
+  public DiscordUser Author { get; init; } = new DiscordUser();
+
+}
+
+internal sealed record DiscordUser
+{
+  [JsonPropertyName("id")]
+  public string Id { get; init; } = string.Empty;
+}

src/StevesBot.Worker/Worker.cs

@@ -20,17 +20,29 @@ internal class Worker : IHostedService
     // in delegate...don't try to resolve it from the service provider
     // TODO: Provide .On and .Off method overloads to allow
     // caller to not need to use discard for unused parameters
-    _discordGatewayClient.On(DiscordEventTypes.Ready, static (discordEvent, sp) =>
+    _discordGatewayClient.On(DiscordEventTypes.MessageCreate, static (discordEvent, sp) =>
     {
+      var discordRestClient = sp.GetRequiredService<IDiscordRestClient>();
       var logger = sp.GetRequiredService<ILogger<DiscordGatewayClient>>();
-      logger.LogInformation("Ready handler 1");
-      return Task.CompletedTask;
-    });
 
-    _discordGatewayClient.On(DiscordEventTypes.Ready, static (discordEvent, sp) =>
-    {
-      var logger = sp.GetRequiredService<ILogger<DiscordGatewayClient>>();
-      logger.LogInformation("Ready handler 2");
+      // TODO: When a user join message is received,
+      // we are going to reply to the message with
+      // a welcome greeting
+      // A user join message is type 8
+      // Will need to use REST API to reply to the message
+
+      if (
+        discordEvent is MessageCreateDiscordEvent mcde &&
+        mcde.IsMessageType(DiscordMessageTypes.UserJoin)
+      )
+      {
+        logger.LogInformation("Guild Id: {GuildId}", mcde.Data.GuildId);
+        logger.LogInformation("Channel Id: {ChannelId}", mcde.Data.ChannelId);
+        logger.LogInformation("Message Id: {MessageId}", mcde.Data.Id);
+        logger.LogInformation("User Id: {UserId}", mcde.Data.Author.Id);
+        return Task.CompletedTask;
+      }
+
       return Task.CompletedTask;
     });