feat: 🚸 add penalty cost if spamming messages

If a user sends messages too fast, it will give them a penalty defined by "penaltyAmount" so that users will lose credits by spamming. Spam rate is set by "maxMessageAmount" which is how many messages a user is allowed to send during "checkTime"

src/events/messageCreate/components/earnCredits.ts

@@ -25,16 +25,44 @@ export default async (message: Message) => {
   }
 
   try {
-    await creditsManager.give(guild, author, 1);
+    const filter = (msg: Message) => {
+      return msg.author == message.author;
+    };
+
+    if (message.author.bot) return;
+
+    const checkTime = 5 * 1000; // Milliseconds
+    const maxMessageAmount = 3; // Anti Spam Rule, remove 1 credit per message above this value during "checkTime" variable
+    const amount = 1; //Amount to give if valid
+    const penaltyAmount = 2; //Amount to take if invalid
+
+    await message.channel
+      .awaitMessages({ filter, time: checkTime })
+      .then(async (messages) => {
+        // Sounds logic with <= but since it goes down to 0 it should be < since we do not want to add at 3 too since then we add 4
+        // If user is below "maxMessageAmount"
+        if (messages.size < maxMessageAmount) {
+          await creditsManager.give(guild, author, amount);
+        }
+
+        // Sounds logic with > but since it goes down to 0 it should be >= since we want to remove at 0 too
+        // If user exceeds "maxMessageAmount"
+        if (messages.size >= maxMessageAmount) {
+          await creditsManager.take(guild, author, penaltyAmount);
+        }
+
+        // When it finished calculating results
+        if (messages.size === 0) {
+          await setCooldown(guild, author);
+        }
+      });
   } catch (error: unknown) {
     logger.error(
       `Failed to give credits to user ${author.username} in guild ${
         guild.name
       } when sending a message: ${String(error)}`
     );
   }
-
-  await setCooldown(guild, author);
 };
 
 function isMessageValid(
@@ -44,6 +72,8 @@ function isMessageValid(
   content: string
 ): boolean {
   return (
+    guild &&
+    author &&
     !author.bot &&
     channel.type === ChannelType.GuildText &&
     content.length >= MINIMUM_LENGTH