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use rss::Channel;
use std::fs::File;
use std::path::PathBuf;
/// 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, newest_first: bool) -> Vec<(usize, &str)> {
let iter = channel.items().iter();
if newest_first {
iter.enumerate()
.filter_map(|(i, item)| item.enclosure().map(|e| (i + 1, e.url())))
.collect()
} else {
iter.rev()
.enumerate()
.filter_map(|(i, item)| item.enclosure().map(|e| (i + 1, e.url())))
.collect()
}
}
/// Download the given audio file to the supplied directory
pub fn download_file(
url: &str,
output_dir: &str,
prefix: Option<&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 filename = if let Some(p) = prefix {
format!("{}-{}", p, filename)
} else {
filename.to_string()
};
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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