Add dl command for downloading videos

commands/misc/dl.js

@@ -0,0 +1,85 @@
+const { execFileSync } = require('child_process');
+const path = require('path');
+const fs = require('fs')
+
+module.exports = {
+    name: 'dl',
+    description: 'Download a video',
+    moreHelp: [
+        "Usage: <prefix>dl <url>"
+    ],
+    async execute({message, args}) {
+        const downloadsDir = path.resolve(process.cwd(), 'data', 'downloads', Date.now().toString());
+        const cookieFilepath = path.resolve(process.cwd(), 'data', 'cookies.txt')
+        if(!fs.existsSync(cookieFilepath)) {
+            message.channel.send("Some dependencies are needed for the command to work properly. Please let the bot's owner know.")
+            return;
+        }
+        fs.mkdirSync(downloadsDir, {recursive: true});
+        
+        let url;
+        
+        if(args.length > 0){
+            if(args[0].charAt(0) === '<' && args[0].charAt(args[0].length - 1) === '>'){
+                args[0] = args[0].slice(1, args[0].length - 1)
+            }
+            try {
+                url = new URL(args[0]);
+                url = url.href;
+            } catch (error) {
+                this.cleanUp(downloadsDir);
+                message.channel.send("Could not parse the provided argument as a URL.");
+                return;
+            }
+        } else {
+            this.cleanUp(downloadsDir);
+            return message.channel.send("You have to provide a URL in an argument.")
+        }
+        
+        const originalMessage = await message.channel.send("Downloading video...")
+        
+        if(this.executeCommand("yt-dlp", [url, "-P", downloadsDir, "--cookies", cookieFilepath]).error){
+            originalMessage.edit("An error occurred when downloading the video.");
+            this.cleanUp(downloadsDir);
+            return;
+        }
+        
+
+        let files = fs.readdirSync(downloadsDir);
+        if(files.length < 1) {
+            this.cleanUp(downloadsDir);
+            originalMessage.edit("Something went wrong when downloading the video.")
+            return;
+        }
+        const filename = files[0];
+
+        await originalMessage.edit({
+            content: null,
+            files: [{
+            attachment: path.resolve(downloadsDir, filename)
+        }]})
+
+        this.cleanUp(downloadsDir);
+
+        
+    },
+
+    cleanUp(downloadsDir){
+        fs.rmSync(downloadsDir, {force: true, recursive: true});
+    },
+    
+    executeCommand(command, commandArgs, verbose=false) {
+        if (typeof command !== 'string' || !Array.isArray(commandArgs)) return { error: true };
+        console.log("Executing:", command, commandArgs.join(" "));
+        try {
+            const output = execFileSync(command, commandArgs, {encoding: 'utf8'})
+            if (output.length != 0 && verbose)
+                console.log(output)
+        } catch (error) {
+            console.error(`Error executing ${command} command:`, error);
+            return { error: true };
+        }
+        return { error: false };
+    },
+    
+}