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use crate::structs::*;
use crate::utils;
use failure::Fail;
use std::collections::HashSet;
use std::fs::File;
use std::io::{self, BufReader, BufWriter, Write};
use failure::Error;
use rayon::prelude::*;
use regex::Regex;
use reqwest;
pub fn download_range(state: &State, p_search: &str, e_search: &str) -> Result<(), Error> {
let re_pod = Regex::new(&format!("(?i){}", &p_search))?;
for subscription in &state.subscriptions {
if re_pod.is_match(&subscription.title) {
let podcast = Podcast::from_title(&subscription.title)?;
let episodes = podcast.episodes();
let episodes_to_download = parse_download_episodes(e_search)?;
episodes_to_download
.par_iter()
.map(|ep_num| &episodes[episodes.len() - ep_num])
.map(|ep| download(podcast.title(), ep))
.flat_map(std::result::Result::err)
.for_each(|err| println!("Error: {}", err));
}
}
Ok(())
}
pub fn download_episode_by_num(state: &State, p_search: &str, e_search: &str) -> Result<(), Error> {
let re_pod = Regex::new(&format!("(?i){}", &p_search))?;
if let Ok(ep_num) = e_search.parse::<usize>() {
for subscription in &state.subscriptions {
if re_pod.is_match(&subscription.title) {
let podcast = Podcast::from_title(&subscription.title)?;
let episodes = podcast.episodes();
download(podcast.title(), &episodes[episodes.len() - ep_num])?;
}
}
} else {
eprintln!("Failed to parse episode number...\nAttempting to find episode by name...");
download_episode_by_name(state, p_search, e_search, false)?;
}
Ok(())
}
#[derive(Debug, Fail)]
enum DownloadError {
#[fail(display = "File already exists: {}", path)]
AlreadyExists { path: String },
}
pub fn download(podcast_name: &str, episode: &Episode) -> Result<(), Error> {
let mut path = utils::get_podcast_dir()?;
path.push(podcast_name);
utils::create_dir_if_not_exist(&path)?;
if let (Some(mut title), Some(url)) = (episode.title(), episode.url()) {
if let Some(ext) = episode.extension() {
title = utils::append_extension(&title, &ext);
}
path.push(title);
if !path.exists() {
println!("Downloading: {:?}", &path);
let resp = reqwest::get(url)?;
let file = File::create(&path)?;
let mut reader = BufReader::new(resp);
let mut writer = BufWriter::new(file);
io::copy(&mut reader, &mut writer)?;
} else {
return Err(DownloadError::AlreadyExists {
path: path.to_str().unwrap().to_string(),
}
.into());
}
}
Ok(())
}
pub fn download_episode_by_name(
state: &State,
p_search: &str,
e_search: &str,
download_all: bool,
) -> Result<(), Error> {
let re_pod = Regex::new(&format!("(?i){}", &p_search))?;
for subscription in &state.subscriptions {
if re_pod.is_match(&subscription.title) {
let podcast = Podcast::from_title(&subscription.title)?;
let episodes = podcast.episodes();
let filtered_episodes =
episodes
.iter()
.filter(|ep| ep.title().is_some())
.filter(|ep| {
ep.title()
.unwrap()
.to_lowercase()
.contains(&e_search.to_lowercase())
});
if download_all {
filtered_episodes
.map(|ep| download(podcast.title(), ep))
.flat_map(std::result::Result::err)
.for_each(|err| eprintln!("Error: {}", err));
} else {
filtered_episodes
.take(1)
.map(|ep| download(podcast.title(), ep))
.flat_map(std::result::Result::err)
.for_each(|err| eprintln!("Error: {}", err));
}
}
}
Ok(())
}
pub fn download_all(state: &State, p_search: &str) -> Result<(), Error> {
let re_pod = Regex::new(&format!("(?i){}", &p_search))?;
for subscription in &state.subscriptions {
if re_pod.is_match(&subscription.title) {
let podcast = Podcast::from_title(&subscription.title)?;
print!(
"You are about to download all episodes of {} (y/n): ",
podcast.title()
);
io::stdout().flush().ok();
let mut input = String::new();
io::stdin().read_line(&mut input)?;
if input.to_lowercase().trim() != "y" {
return Ok(());
}
let mut path = utils::get_podcast_dir()?;
path.push(podcast.title());
utils::already_downloaded(podcast.title()).map(|downloaded| {
podcast
.episodes()
.par_iter()
.filter(|e| e.title().is_some())
.filter(|e| !downloaded.contains(&e.title().unwrap()))
.map(|e| download(podcast.title(), e))
.flat_map(std::result::Result::err)
.for_each(|err| eprintln!("Error: {}", err))
})?;
}
}
Ok(())
}
pub fn download_rss(config: Config, url: &str) -> Result<(), Error> {
let channel = utils::download_rss_feed(url)?;
let mut download_limit = config.auto_download_limit as usize;
if 0 < download_limit {
println!(
"Subscribe auto-download limit set to: {}\nDownloading episode(s)...",
download_limit
);
let podcast = Podcast::from(channel);
let episodes = podcast.episodes();
if episodes.len() < download_limit {
download_limit = episodes.len()
}
episodes[..download_limit]
.par_iter()
.map(|ep| download(podcast.title(), ep))
.flat_map(std::result::Result::err)
.for_each(|err| eprintln!("Error downloading {}: {}", podcast.title(), err));
}
Ok(())
}
fn parse_download_episodes(e_search: &str) -> Result<HashSet<usize>, Error> {
let input = String::from(e_search);
let mut ranges = Vec::<(usize, usize)>::new();
let mut elements = HashSet::<usize>::new();
let comma_separated: Vec<&str> = input.split(',').collect();
for elem in comma_separated {
if elem.contains('-') {
let range: Vec<usize> = elem
.split('-')
.map(str::parse)
.collect::<Result<Vec<usize>, std::num::ParseIntError>>()?;
ranges.push((range[0], range[1]));
} else {
elements.insert(elem.parse::<usize>()?);
}
}
for range in ranges {
// Include given episode in the download
for num in range.0..=range.1 {
elements.insert(num);
}
}
Ok(elements)
}
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