made utils file

src/bot.js

@@ -4,6 +4,7 @@ import {enums} from "./enums.js";
 import {commands} from "./commands.js";
 import {webhookHelper} from "./helpers/webhookHelper.js";
 import * as env from 'dotenv';
+import {utils} from "./helpers/utils";
 
 env.config();
 
@@ -61,22 +62,14 @@ client.on(Events.Ready, () => {
 let guildCount = 0;
 client.on(Events.GuildCreate, () => {
     guildCount++;
-    callback();
+    debouncePrintGuilds();
 });
 
 function printGuilds() {
     console.log(`Serving ${client.guilds.size} guild(s)`);
 }
 
-const callback  = Debounce(printGuilds, 2000);
-
-function Debounce(func, delay) {
-    let timeout = null;
-    return function (...args) {
-        clearTimeout(timeout);
-        timeout = setTimeout(() => func(...args), delay);
-    };
-}
+const debouncePrintGuilds  = utils.debounce(printGuilds, 2000);
 
 try {
     await client.login(token);

src/helpers/utils.js

@@ -0,0 +1,28 @@
+
+const u = {};
+
+u.debounce = function(func, delay) {
+    let timeout = null;
+    return function (...args) {
+        clearTimeout(timeout);
+        timeout = setTimeout(() => func(...args), delay);
+    };
+}
+
+/**
+ * Checks if an uploaded picture is in the right format.
+ *
+ * @async
+ * @param {string} imageUrl - The url of the image
+ * @throws {Error} When loading the profile picture from a URL doesn't work, or it fails requirements.
+ */
+u.checkImageFormatValidity = async function (imageUrl) {
+    const acceptableImages = ['image/png', 'image/jpg', 'image/jpeg', 'image/webp'];
+    await fetch(imageUrl).then(r => r.blob()).then(blobFile => {
+        if (blobFile.size > 1000000 || !acceptableImages.includes(blobFile.type)) throw new Error(enums.err.PROPIC_FAILS_REQUIREMENTS);
+    }).catch((error) => {
+        throw new Error(`${enums.err.PROPIC_CANNOT_LOAD}: ${error.message}`);
+    });
+}
+
+export const utils = u;