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/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2025 metamuffin <metamuffin.org>
*/
use crate::{DATABASE, node::DatabaseNodeUserDataExt, session::Session};
use anyhow::{Context, Result};
use jellycommon::{
NodeID, NodeKind, Rating, Visibility,
api::ApiHomeResponse,
chrono::{Datelike, Utc},
user::WatchedState,
};
pub fn home(session: &Session) -> Result<ApiHomeResponse> {
let mut items = DATABASE.list_nodes_with_udata(&session.user.name)?;
let mut toplevel = DATABASE
.get_node_children(NodeID::from_slug("library"))
.context("root node missing")?
.into_iter()
.map(|n| DATABASE.get_node_with_userdata(n, &session))
.collect::<anyhow::Result<Vec<_>>>()?;
toplevel.sort_by_key(|(n, _)| n.index.unwrap_or(usize::MAX));
let mut categories = Vec::<(String, Vec<_>)>::new();
categories.push((
"home.bin.continue_watching".to_string(),
items
.iter()
.filter(|(_, u)| matches!(u.watched, WatchedState::Progress(_)))
.cloned()
.collect(),
));
categories.push((
"home.bin.watchlist".to_string(),
items
.iter()
.filter(|(_, u)| matches!(u.watched, WatchedState::Pending))
.cloned()
.collect(),
));
items.retain(|(n, _)| matches!(n.visibility, Visibility::Visible));
items.sort_by_key(|(n, _)| n.release_date.map(|d| -d).unwrap_or(i64::MAX));
categories.push((
"home.bin.latest_video".to_string(),
items
.iter()
.filter(|(n, _)| matches!(n.kind, NodeKind::Video))
.take(16)
.cloned()
.collect(),
));
categories.push((
"home.bin.latest_music".to_string(),
items
.iter()
.filter(|(n, _)| matches!(n.kind, NodeKind::Music))
.take(16)
.cloned()
.collect(),
));
categories.push((
"home.bin.latest_short_form".to_string(),
items
.iter()
.filter(|(n, _)| matches!(n.kind, NodeKind::ShortFormVideo))
.take(16)
.cloned()
.collect(),
));
items.sort_by_key(|(n, _)| {
n.ratings
.get(&Rating::Tmdb)
.map(|x| (*x * -1000.) as i32)
.unwrap_or(0)
});
categories.push((
"home.bin.max_rating".to_string(),
items
.iter()
.take(16)
.filter(|(n, _)| n.ratings.contains_key(&Rating::Tmdb))
.cloned()
.collect(),
));
items.retain(|(n, _)| {
matches!(
n.kind,
NodeKind::Video | NodeKind::Movie | NodeKind::Episode | NodeKind::Music
)
});
categories.push((
"home.bin.daily_random".to_string(),
(0..16)
.flat_map(|i| Some(items[cheap_daily_random(i).checked_rem(items.len())?].clone()))
.collect(),
));
{
let mut items = items.clone();
items.retain(|(_, u)| matches!(u.watched, WatchedState::Watched));
categories.push((
"home.bin.watch_again".to_string(),
(0..16)
.flat_map(|i| Some(items[cheap_daily_random(i).checked_rem(items.len())?].clone()))
.collect(),
));
}
items.retain(|(n, _)| matches!(n.kind, NodeKind::Music));
categories.push((
"home.bin.daily_random_music".to_string(),
(0..16)
.flat_map(|i| Some(items[cheap_daily_random(i).checked_rem(items.len())?].clone()))
.collect(),
));
Ok(ApiHomeResponse {
toplevel,
categories,
})
}
fn cheap_daily_random(i: usize) -> usize {
xorshift(xorshift(Utc::now().num_days_from_ce() as u64) + i as u64) as usize
}
fn xorshift(mut x: u64) -> u64 {
x ^= x << 13;
x ^= x >> 7;
x ^= x << 17;
x
}
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