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use rss::Channel;
use std::env;
use std::fs::File;
use std::path::PathBuf;
/// Parse CLI arguments and return (feed_url, output_dir)
pub fn parse_args() -> (String, String) {
let mut args: Vec<String> = env::args().collect();
if args.len() < 2 {
eprintln!("Usage: {} <RSS_FEED_URL> [OUTPUT_DIR]", args[0]);
std::process::exit(1);
}
let feed_url = args.remove(1);
let output_dir = if args.len() > 1 {
args.remove(1)
} else {
String::from(".")
};
(feed_url, output_dir)
}
/// Fetch RSS feed content from a URL
pub fn fetch_feed(url: &str) -> Result<String, reqwest::Error> {
reqwest::blocking::get(url)?.text()
}
/// Parse RSS XML into a Channel
pub fn parse_feed(xml: &str) -> Result<Channel, rss::Error> {
Channel::read_from(xml.as_bytes())
}
/// Extract the audio URLs from the given channel
pub fn get_audio_urls(channel: &Channel) -> Vec<&str> {
channel
.items()
.iter()
.rev()
.filter_map(|item| item.enclosure().map(|e| e.url()))
.collect()
}
/// Download the given audio file to the supplied directory
pub fn download_file(url: &str, output_dir: &str) -> Result<(), Box<dyn std::error::Error>> {
let mut response = reqwest::blocking::get(url)?;
let filename = url.split('/').next_back().unwrap_or("episode.mp3");
let mut path = PathBuf::from(output_dir);
path.push(filename);
let mut file = File::create(path)?;
std::io::copy(&mut response, &mut file)?;
Ok(())
}
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