Improve and fix the discord rate limit warnings

VelocityCore/src/de/steamwar/velocitycore/discord/DiscordBot.java

@@ -167,14 +167,19 @@ public class DiscordBot {
         checklistChannel = new ChecklistChannel(config.channel("checklist"));
         config.getCouncilThread().forEach((roleId, threadId) -> new CouncilChannel(DiscordBot.getGuild().getRoleById(roleId), DiscordBot.getGuild().getThreadChannelById(threadId)));
 
-        announcementChannel = new DiscordChannel(config.channel("announcement")) {
+        announcementChannel = new DiscordChannel(config.channel("announcement"), 0) {
             @Override
             public void received(MessageReceivedEvent event) {
                 Chatter.broadcast().system("ALERT", event.getMessage().getContentDisplay());
             }
         };
-        ingameChat = new DiscordChatRoom(config.channel("ingame"), "CHAT_DISCORD_GLOBAL", Chatter::broadcast);
-        serverTeamChat = new DiscordChatRoom(config.channel("serverteam"), "CHAT_SERVERTEAM", Chatter::serverteam);
+
+        // There is a hard limit of 30 messages per minute to send as a webhook, thus with 5 webhooks we can send
+        // 180 messages per minute. Which means 3 every second. I looked at the WGS fights and there were around
+        // ~70 in a short burst and then rather long no new message.
+        ingameChat = new DiscordChatRoom(config.channel("ingame"), "CHAT_DISCORD_GLOBAL", Chatter::broadcast, 5);
+        // 30 messages per minute should be enough for the server team!
+        serverTeamChat = new DiscordChatRoom(config.channel("serverteam"), "CHAT_SERVERTEAM", Chatter::serverteam, 1);
 
         VelocityCore.schedule(() -> {
             try {

VelocityCore/src/de/steamwar/velocitycore/discord/channels/DiscordChannel.java

@@ -26,17 +26,21 @@ import de.steamwar.velocitycore.discord.DiscordBot;
 import de.steamwar.velocitycore.discord.listeners.ChannelListener;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
-import net.dv8tion.jda.api.entities.Icon;
 import net.dv8tion.jda.api.entities.User;
+import net.dv8tion.jda.api.entities.Webhook;
+import net.dv8tion.jda.api.entities.WebhookClient;
 import net.dv8tion.jda.api.entities.channel.concrete.TextChannel;
 import net.dv8tion.jda.api.entities.channel.middleman.MessageChannel;
 import net.dv8tion.jda.api.events.interaction.component.GenericComponentInteractionCreateEvent;
 import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
-import net.dv8tion.jda.api.utils.ImageProxy;
 import net.dv8tion.jda.api.utils.messages.MessageCreateBuilder;
+import net.dv8tion.jda.internal.requests.IncomingWebhookClientImpl;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
 
+import java.util.ArrayDeque;
+import java.util.Queue;
+
 
 @AllArgsConstructor
 public class DiscordChannel extends Chatter.PlayerlessChatter {
@@ -46,31 +50,37 @@ public class DiscordChannel extends Chatter.PlayerlessChatter {
         return user != null ? user : SteamwarUser.get(0);
     }
 
+    private final Queue<Webhook> webhooks = new ArrayDeque<>();
+    private final int maxNumberOfWebhooks;
+
     private final SteamwarUser user;
     @Getter
     private final MessageChannel channel;
 
     public DiscordChannel(User user) {
-        this(userOrPublic(user), user.openPrivateChannel().complete());
+        this(0, userOrPublic(user), user.openPrivateChannel().complete());
     }
 
-    public DiscordChannel(String channel) {
-        this(DiscordBot.getGuild().getTextChannelById(channel));
+    public DiscordChannel(String channel, int maxNumberOfWebhooks) {
+        this(DiscordBot.getGuild().getTextChannelById(channel), maxNumberOfWebhooks);
     }
 
-    public DiscordChannel(MessageChannel channel) {
-        this(SteamwarUser.get(-1), channel);
+    public DiscordChannel(MessageChannel channel, int maxNumberOfWebhooks) {
+        this(maxNumberOfWebhooks, SteamwarUser.get(-1), channel);
         ChannelListener.getChannels().put(this.channel, this);
+        if (channel instanceof TextChannel) {
+            webhooks.addAll(((TextChannel) channel).retrieveWebhooks().complete());
+        }
     }
 
-    public void send(String message) {
+    public synchronized void send(String message) {
         message = message
                 .replace("&", "")
                 .replace("@everyone", "`@everyone`")
                 .replace("@here", "`@here`")
                 .replaceAll("<[@#]!?\\d+>", "`$0`");
 
-        if (getChannel() instanceof TextChannel && message.contains("»")) {
+        if (maxNumberOfWebhooks > 0 && getChannel() instanceof TextChannel && message.contains("»")) {
             String[] strings = message.split("»", 2);
             String userName = strings[0];
             String sendMessage = strings[1];
@@ -85,29 +95,28 @@ public class DiscordChannel extends Chatter.PlayerlessChatter {
                 return;
             }
 
-            ImageProxy avatarUrl;
+            String avatarUrl;
             if (user.getDiscordId() != null) {
-                avatarUrl = DiscordBot.getGuild().retrieveMemberById(user.getDiscordId()).complete().getEffectiveAvatar();
+                avatarUrl = DiscordBot.getGuild().retrieveMemberById(user.getDiscordId()).complete().getEffectiveAvatarUrl();
             } else {
-                avatarUrl = DiscordBot.getInstance().getJda().getSelfUser().getAvatar();
+                avatarUrl = DiscordBot.getInstance().getJda().getSelfUser().getAvatarUrl();
             }
 
             TextChannel textChannel = (TextChannel) getChannel();
-            try {
-                textChannel.createWebhook(userName)
-                        .setAvatar(Icon.from(avatarUrl.download(128).get()))
-                        .onSuccess(webhook -> {
-                            webhook.sendMessage(sendMessage)
-                                    .onSuccess(__ -> {
-                                        webhook.delete().queue();
-                                    })
-                                    .queue();
-                        })
-                        .queue();
-                return;
-            } catch (Exception e) {
-                // Ignore and send message as normal!
+            if (webhooks.size() < maxNumberOfWebhooks) {
+                webhooks.add(textChannel.createWebhook(DiscordBot.getInstance().getJda().getSelfUser().getName() + "_" + webhooks.size()).complete());
             }
+            Webhook webhook = webhooks.poll();
+            webhooks.add(webhook);
+
+            // This works as per this documentation: https://discord.com/developers/docs/resources/webhook#execute-webhook
+            IncomingWebhookClientImpl webhookClient = (IncomingWebhookClientImpl) WebhookClient.createClient(DiscordBot.getInstance().getJda(), webhook.getUrl());
+            webhookClient.sendRequest()
+                    .setUsername(userName)
+                    .setAvatarUrl(avatarUrl)
+                    .setContent(sendMessage)
+                    .queue();
+            return;
         }
 
         send(new MessageCreateBuilder()

VelocityCore/src/de/steamwar/velocitycore/discord/channels/DiscordChatRoom.java

@@ -33,8 +33,8 @@ public class DiscordChatRoom extends DiscordChannel {
     private final String format;
     private final Supplier<ChatterGroup> target;
 
-    public DiscordChatRoom(String channel, String format, Supplier<ChatterGroup> target) {
-        super(channel);
+    public DiscordChatRoom(String channel, String format, Supplier<ChatterGroup> target, int maxNumberOfWebhooks) {
+        super(channel, maxNumberOfWebhooks);
         this.format = format;
         this.target = target;
     }

VelocityCore/src/de/steamwar/velocitycore/discord/listeners/DiscordTicketHandler.java

@@ -70,7 +70,7 @@ public class DiscordTicketHandler extends ListenerAdapter {
                 Permission.MESSAGE_HISTORY).complete();
         ticketChannel.getManager().setTopic(event.getUser().getId()).complete();
 
-        DiscordChannel channel = new DiscordChannel(DiscordChannel.userOrPublic(event.getUser()), ticketChannel);
+        DiscordChannel channel = new DiscordChannel(0, DiscordChannel.userOrPublic(event.getUser()), ticketChannel);
         channel.send(new MessageCreateBuilder()
                 .setEmbeds(new EmbedBuilder()
                         .setTitle(channel.parseToPlain("DC_TICKET_TITLE"))