348 lines
17 KiB
Rust
348 lines
17 KiB
Rust
use std::{
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collections::{BTreeSet, HashMap},
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path::PathBuf,
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};
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use lazy_static::lazy_static;
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use log::{debug, trace, warn};
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use regex::Regex;
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use super::{EpisodeNumber, Episodes};
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lazy_static! {
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static ref NUMBER_REGEX: Regex = Regex::new("[0-9]+").unwrap();
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}
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// An association of numbers to items, sorted by number.
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//
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// We use a BTreeSet of pairs rather than a BTreeMap so that
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// duplicates are preserved.
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type Enumeration<T> = BTreeSet<(u32, T)>;
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fn consecutiveness<T>(enumeration: &Enumeration<T>) -> usize {
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enumeration
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.iter()
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.zip(enumeration.iter().skip(1))
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.filter(|((cur, _), (next, _))| next - cur == 1)
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.count()
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}
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fn fully_consecutive<T>(enumeration: &Enumeration<T>) -> bool {
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consecutiveness(enumeration) == enumeration.len() - 1
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}
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// Take a series of items that can be represented as strings. For each
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// string prefix which is followed by a number in one or more items'
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// representations, record what the number is for each item that has
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// that prefix.
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fn prefix_enumerations<'a, T: Copy + Ord, I: Iterator<Item = T>, F: Fn(T) -> &'a str>(
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items: I,
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f: F,
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) -> HashMap<&'a str, Enumeration<T>> {
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let mut enumerations: HashMap<&str, Enumeration<T>> = HashMap::new();
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for item in items {
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let name = f(item);
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for m in NUMBER_REGEX.find_iter(name) {
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let num = m.as_str().parse();
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if let Err(e) = num {
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warn!("Failed to parse candidate number: {}", e);
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continue;
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}
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let num = num.unwrap();
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let prefix = name.get(..m.start()).unwrap();
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trace!("{}: candidate prefix {}, number {}", name, prefix, num);
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enumerations.entry(prefix).or_default().insert((num, item));
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}
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}
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enumerations
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}
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pub fn enumerate_episodes(files: Vec<PathBuf>) -> Option<Episodes> {
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let mut episode_enumerations = prefix_enumerations(files.iter(), |path| {
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path.file_name().unwrap().to_str().unwrap()
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});
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// Retain only prefix enumerations that produce consecutive numbers
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episode_enumerations.retain(|_, en| consecutiveness(en) > 0);
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let mut result: Episodes = HashMap::new();
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if episode_enumerations.len() > 1 {
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// There are multiple viable episode enumerations, which may
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// mean that this list of files includes multiple seasons of a
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// series. Look for a fully consecutive prefix enumeration *of
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// the candidate episode prefixes* to find season numbers.
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let season_enumerations = prefix_enumerations(episode_enumerations.keys(), |s| s);
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let best_season_enumeration = season_enumerations
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.into_values()
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.max_by_key(consecutiveness);
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if let Some(season_enumeration) = best_season_enumeration {
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if season_enumeration.len() > 1 && fully_consecutive(&season_enumeration) {
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for (season_num, prefix) in season_enumeration.into_iter() {
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for (episode_num, path) in episode_enumerations.get(prefix).unwrap().iter() {
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debug!(
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"Season {} episode {}: {}",
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season_num,
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episode_num,
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path.display()
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);
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if let Some(dup) = result.insert(
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EpisodeNumber::MultiSeason(season_num, *episode_num),
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path.to_path_buf(),
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) {
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warn!(
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"Duplicate episode number, discarding file {}",
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dup.display()
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);
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}
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}
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}
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return Some(result);
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}
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}
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}
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// No evidence found for multiple seasons, so just take the best episode enumeration
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let best_episode_enumeration = episode_enumerations
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.into_values()
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.max_by_key(consecutiveness)?;
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for (num, path) in best_episode_enumeration.into_iter() {
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debug!("Episode {}: {}", num, path.display());
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if let Some(dup) = result.insert(EpisodeNumber::SingleSeason(num), path.to_path_buf()) {
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warn!(
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"Duplicate episode number, discarding file {}",
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dup.display()
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);
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}
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}
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Some(result)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_enumerate_single_season() {
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let files = vec![
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 07v2 (1080p) [BBF1FDA4].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 08 (1080p) [95D16D74].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 04v2 (1080p) [D291A3B0].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 11v2 (1080p) [B7B3ECB6].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 05 (1080p) [16CC6267].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 02v2 (1080p) [5E88C757].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 03v2 (1080p) [5F5AD4BD].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 01v2 (1080p) [8C038972].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 12 (1080p) [179132FA].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 06v2 (1080p) [21EA6641].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 09 (1080p) [5A9C6CEC].mkv",
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),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 10 (1080p) [97953FA7].mkv",
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),
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];
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let expected = Some(HashMap::from([
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(
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EpisodeNumber::SingleSeason(1),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 01v2 (1080p) [8C038972].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(2),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 02v2 (1080p) [5E88C757].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(3),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 03v2 (1080p) [5F5AD4BD].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(4),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 04v2 (1080p) [D291A3B0].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(5),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 05 (1080p) [16CC6267].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(6),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 06v2 (1080p) [21EA6641].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(7),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 07v2 (1080p) [BBF1FDA4].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(8),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 08 (1080p) [95D16D74].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(9),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 09 (1080p) [5A9C6CEC].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(10),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 10 (1080p) [97953FA7].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(11),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 11v2 (1080p) [B7B3ECB6].mkv",
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),
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),
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(
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EpisodeNumber::SingleSeason(12),
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PathBuf::from(
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"media/Chainsaw Man/[SubsPlease] Chainsaw Man - 12 (1080p) [179132FA].mkv",
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),
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),
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]));
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assert_eq!(enumerate_episodes(files), expected);
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}
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#[test]
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fn test_enumerate_two_seasons_with_number_in_title() {
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let files = vec![
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PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E04 - A Reason to Fight (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E03 - Allelujah Rescue Operation (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E05 - Homeland Burning (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E02 - Gundam Meisters (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E02 - Twin Drive (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E01 - Celestial Being (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E06 - Scars (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E04 - International Negotiation (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E05 - Escape Limit Zone (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E03 - The Changing World (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E01 - The Angels' Second Advent (720p - DUAL Audio).mkv"),
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PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E06 - Seven Swords (720p - DUAL Audio).mkv"),
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];
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let expected = Some(HashMap::from([
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(EpisodeNumber::MultiSeason(1, 1), PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E01 - Celestial Being (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(1, 2), PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E02 - Gundam Meisters (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(1, 3), PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E03 - The Changing World (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(1, 4), PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E04 - International Negotiation (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(1, 5), PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E05 - Escape Limit Zone (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(1, 6), PathBuf::from("media/MSG 00/MS Gundam 00 - S01 E06 - Seven Swords (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(2, 1), PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E01 - The Angels' Second Advent (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(2, 2), PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E02 - Twin Drive (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(2, 3), PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E03 - Allelujah Rescue Operation (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(2, 4), PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E04 - A Reason to Fight (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(2, 5), PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E05 - Homeland Burning (720p - DUAL Audio).mkv")),
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(EpisodeNumber::MultiSeason(2, 6), PathBuf::from("media/MSG 00/MS Gundam 00 - S02 E06 - Scars (720p - DUAL Audio).mkv")),
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]));
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assert_eq!(enumerate_episodes(files), expected);
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}
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#[test]
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fn test_enumerate_non_ascii() {
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let files = vec![
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PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 03 ／ 機動戦士ガンダム Twilight AXIS 第3話 [720p].mkv"),
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PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 06 ／ 機動戦士ガンダム Twilight AXIS 第6話 [720p].mkv"),
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PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 02 ／ 機動戦士ガンダム Twilight AXIS 第2話 [720p].mkv"),
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PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 04 ／ 機動戦士ガンダム Twilight AXIS 第4話 [720p].mkv"),
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PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 01 ／ 機動戦士ガンダム Twilight AXIS 第1話 [720p].mkv"),
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PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 05 ／ 機動戦士ガンダム Twilight AXIS 第5話 [720p].mkv"),
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];
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let expected = Some(HashMap::from([
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(EpisodeNumber::SingleSeason(1), PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 01 ／ 機動戦士ガンダム Twilight AXIS 第1話 [720p].mkv")),
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(EpisodeNumber::SingleSeason(2), PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 02 ／ 機動戦士ガンダム Twilight AXIS 第2話 [720p].mkv")),
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(EpisodeNumber::SingleSeason(3), PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 03 ／ 機動戦士ガンダム Twilight AXIS 第3話 [720p].mkv")),
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(EpisodeNumber::SingleSeason(4), PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 04 ／ 機動戦士ガンダム Twilight AXIS 第4話 [720p].mkv")),
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(EpisodeNumber::SingleSeason(5), PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 05 ／ 機動戦士ガンダム Twilight AXIS 第5話 [720p].mkv")),
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(EpisodeNumber::SingleSeason(6), PathBuf::from("media/Twilight AXIS/[(́◉◞౪◟◉‵)] Mobile Suit Gundam Twilight AXIS - 06 ／ 機動戦士ガンダム Twilight AXIS 第6話 [720p].mkv")),
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]));
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assert_eq!(enumerate_episodes(files), expected);
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}
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#[test]
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fn test_enumerate_extraneous_numbered_items() {
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let files = vec![
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_03_Resub(720p)[0A99BA5D].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_OP1_Resub(720p)[A5ADDABF].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]Gundam_Frag_(1080p)[546747A1].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_06_Resub(720p)[CAADADF2].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_ED2_Resub(720p)[21717EAF].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_02_Resub(720p)[115ABF72].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_05_Resub(720p)[A0FD098A].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_01_Resub(720p)[7CDE63CD].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_ED1_Resub(720p)[CA9B2E3F].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]Gundam_Frag_II(1080p)[49465CA8].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_04_Resub(720p)[8D219C3C].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_OP2_Resub(720p)[F691D6D5].mkv"),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_OP3_Resub(720p)[BD7DCCE6].mkv"),
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];
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let expected = Some(HashMap::from([
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(
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EpisodeNumber::SingleSeason(1),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_01_Resub(720p)[7CDE63CD].mkv"),
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),
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(
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EpisodeNumber::SingleSeason(2),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_02_Resub(720p)[115ABF72].mkv"),
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),
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(
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EpisodeNumber::SingleSeason(3),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_03_Resub(720p)[0A99BA5D].mkv"),
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),
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(
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EpisodeNumber::SingleSeason(4),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_04_Resub(720p)[8D219C3C].mkv"),
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),
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(
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EpisodeNumber::SingleSeason(5),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_05_Resub(720p)[A0FD098A].mkv"),
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),
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(
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EpisodeNumber::SingleSeason(6),
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PathBuf::from("media/ZZ Gundam/[EG]ZZ_Gundam_BD_06_Resub(720p)[CAADADF2].mkv"),
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),
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]));
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assert_eq!(enumerate_episodes(files), expected);
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}
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}
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