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Implement recommendation seed: allow recommendations based on any lis…
…t of album file names
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,194 @@ | ||
| use super::album_read_model::AlbumReadModel; | ||
| use crate::{ | ||
| files::file_metadata::file_name::FileName, | ||
| helpers::{ | ||
| item_with_factor::{desc_sort_by_factor, ItemWithFactor}, | ||
| math::median, | ||
| }, | ||
| }; | ||
| use chrono::Datelike; | ||
| use rayon::prelude::*; | ||
| use std::{collections::HashMap, iter::repeat}; | ||
|
|
||
| pub struct AlbumCollectionSummary { | ||
| pub average_rating: f32, | ||
| pub median_year: u32, | ||
| pub artists: Vec<ItemWithFactor>, | ||
| pub primary_genres: Vec<ItemWithFactor>, | ||
| pub secondary_genres: Vec<ItemWithFactor>, | ||
| pub descriptors: Vec<ItemWithFactor>, | ||
| pub years: Vec<ItemWithFactor>, | ||
| pub decades: Vec<ItemWithFactor>, | ||
| pub credit_tags: Vec<ItemWithFactor>, | ||
| } | ||
|
|
||
| impl AlbumCollectionSummary { | ||
| pub fn new( | ||
| albums: Vec<AlbumReadModel>, | ||
| factor_map: HashMap<FileName, u32>, | ||
| ) -> AlbumCollectionSummary { | ||
| let album_read_models_map = albums | ||
| .into_par_iter() | ||
| .map(|album_read_model| (album_read_model.file_name.clone(), album_read_model)) | ||
| .collect::<HashMap<FileName, AlbumReadModel>>(); | ||
| let mut artists_map: HashMap<String, u32> = HashMap::new(); | ||
| let mut primary_genres_map: HashMap<String, u32> = HashMap::new(); | ||
| let mut secondary_genres_map: HashMap<String, u32> = HashMap::new(); | ||
| let mut descriptors_map: HashMap<String, u32> = HashMap::new(); | ||
| let mut years_map: HashMap<u32, u32> = HashMap::new(); | ||
| let mut decades_map: HashMap<u32, u32> = HashMap::new(); | ||
| let mut credit_tags_map: HashMap<String, u32> = HashMap::new(); | ||
| let mut ratings: Vec<f32> = Vec::new(); | ||
|
|
||
| for (file_name, factor) in &factor_map { | ||
| let album = album_read_models_map.get(file_name); | ||
| if album.is_none() { | ||
| continue; | ||
| } | ||
| let album = album.unwrap(); | ||
|
|
||
| for artist in &album.artists { | ||
| artists_map | ||
| .entry(artist.name.clone()) | ||
| .and_modify(|c| *c += factor) | ||
| .or_insert(*factor); | ||
| } | ||
|
|
||
| for genre in &album.primary_genres { | ||
| primary_genres_map | ||
| .entry(genre.clone()) | ||
| .and_modify(|c| *c += factor) | ||
| .or_insert(*factor); | ||
| } | ||
|
|
||
| for genre in &album.secondary_genres { | ||
| secondary_genres_map | ||
| .entry(genre.clone()) | ||
| .and_modify(|c| *c += factor) | ||
| .or_insert(*factor); | ||
| } | ||
|
|
||
| for descriptor in &album.descriptors { | ||
| descriptors_map | ||
| .entry(descriptor.clone()) | ||
| .and_modify(|c| *c += factor) | ||
| .or_insert(*factor); | ||
| } | ||
|
|
||
| for tag in &album.credit_tags() { | ||
| credit_tags_map | ||
| .entry(tag.clone()) | ||
| .and_modify(|c| *c += factor) | ||
| .or_insert(*factor); | ||
| } | ||
|
|
||
| if let Some(release_date) = album.release_date { | ||
| let year = release_date.year() as u32; | ||
| years_map | ||
| .entry(year) | ||
| .and_modify(|c| *c += factor) | ||
| .or_insert(*factor); | ||
| let decade = year - (year % 10); | ||
| decades_map | ||
| .entry(decade) | ||
| .and_modify(|c| *c += factor) | ||
| .or_insert(*factor); | ||
| } | ||
|
|
||
| ratings.append( | ||
| &mut repeat(album.rating) | ||
| .take(*factor as usize) | ||
| .collect::<Vec<_>>(), | ||
| ); | ||
| } | ||
|
|
||
| let average_rating = ratings.iter().sum::<f32>() / ratings.len() as f32; | ||
|
|
||
| let mut artists = artists_map | ||
| .iter() | ||
| .map(|(item, factor)| ItemWithFactor { | ||
| item: item.clone(), | ||
| factor: *factor, | ||
| }) | ||
| .collect::<Vec<ItemWithFactor>>(); | ||
| desc_sort_by_factor(&mut artists); | ||
|
|
||
| let mut years = years_map | ||
| .iter() | ||
| .map(|(item, factor)| ItemWithFactor { | ||
| item: item.to_string(), | ||
| factor: *factor, | ||
| }) | ||
| .collect::<Vec<ItemWithFactor>>(); | ||
| desc_sort_by_factor(&mut years); | ||
|
|
||
| let median_year = median( | ||
| years | ||
| .iter() | ||
| .flat_map(|item| { | ||
| repeat(item.item.parse::<f32>().unwrap()) | ||
| .take(item.factor as usize) | ||
| .collect::<Vec<_>>() | ||
| }) | ||
| .collect::<Vec<_>>(), | ||
| ) | ||
| .round() as u32; | ||
|
|
||
| let mut primary_genres = primary_genres_map | ||
| .iter() | ||
| .map(|(item, factor)| ItemWithFactor { | ||
| item: item.clone(), | ||
| factor: *factor, | ||
| }) | ||
| .collect::<Vec<ItemWithFactor>>(); | ||
| desc_sort_by_factor(&mut primary_genres); | ||
|
|
||
| let mut secondary_genres = secondary_genres_map | ||
| .iter() | ||
| .map(|(item, factor)| ItemWithFactor { | ||
| item: item.clone(), | ||
| factor: *factor, | ||
| }) | ||
| .collect::<Vec<ItemWithFactor>>(); | ||
| desc_sort_by_factor(&mut secondary_genres); | ||
|
|
||
| let mut descriptors = descriptors_map | ||
| .iter() | ||
| .map(|(item, factor)| ItemWithFactor { | ||
| item: item.clone(), | ||
| factor: *factor, | ||
| }) | ||
| .collect::<Vec<ItemWithFactor>>(); | ||
| desc_sort_by_factor(&mut descriptors); | ||
|
|
||
| let mut credit_tags = credit_tags_map | ||
| .iter() | ||
| .map(|(item, factor)| ItemWithFactor { | ||
| item: item.clone(), | ||
| factor: *factor, | ||
| }) | ||
| .collect::<Vec<ItemWithFactor>>(); | ||
| desc_sort_by_factor(&mut credit_tags); | ||
|
|
||
| let mut decades = decades_map | ||
| .iter() | ||
| .map(|(item, factor)| ItemWithFactor { | ||
| item: item.to_string(), | ||
| factor: *factor, | ||
| }) | ||
| .collect::<Vec<ItemWithFactor>>(); | ||
| desc_sort_by_factor(&mut decades); | ||
|
|
||
| AlbumCollectionSummary { | ||
| average_rating, | ||
| median_year, | ||
| artists, | ||
| primary_genres, | ||
| secondary_genres, | ||
| descriptors, | ||
| credit_tags, | ||
| years, | ||
| decades, | ||
| } | ||
| } | ||
| } |
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