feat: add arg parsing

src/main.rs

@@ -1,13 +1,25 @@
 #![feature(async_closure)]
+use clap::Parser;
 use regex::Regex;
 use reqwest::Client;
 use std::process::ExitCode;
 use tokio::time::{sleep, Duration};
 
-const USER_AGENT: &str = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36";
+#[derive(Parser)]
+#[command(version)]
+struct Args {
+    /// User Agent to use for requests
+    #[arg(
+        short,
+        default_value = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36"
+    )]
+    user_agent: String,
+}
 
 #[tokio::main]
 async fn main() -> ExitCode {
+    let args = Args::parse();
+
     println!("which tags do you want to scrape? ex: 1girls+1boys+yomama");
     let tags = std::io::stdin()
         .lines()
@@ -17,7 +29,7 @@ async fn main() -> ExitCode {
         .trim()
         .to_string();
 
-    let client = Client::builder().user_agent(USER_AGENT).build().unwrap();
+    let client = Client::builder().user_agent(args.user_agent).build().unwrap();
     let mut page = 0;
 
     loop {