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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) 2026 metamuffin <metamuffin.org>
*/
use crate::{
backends::WriteTransaction,
filter::binning::Binning,
query::{MultiBehaviour, ValueSortComponent},
sort::Index,
table::{RowNum, TableNum},
};
use anyhow::Result;
use jellycommon::jellyobject::Object;
pub struct ValueIndex {
id: TableNum,
binning: Binning,
sort: ValueSortComponent,
}
impl ValueIndex {
pub fn new(id: TableNum, binning: Binning, sort: ValueSortComponent) -> Self {
Self { id, binning, sort }
}
fn keys(&self, id: RowNum, ob: Object) -> Vec<Vec<u8>> {
let mut keys = vec![self.id.to_be_bytes().to_vec()];
self.binning.apply(ob, &mut keys);
self.sort.apply(ob, &mut keys);
for k in &mut keys {
k.extend(id.to_ne_bytes());
}
keys
}
}
impl Index for ValueIndex {
fn add(&self, db: &mut dyn WriteTransaction, id: RowNum, ob: Object) -> Result<()> {
for key in self.keys(id, ob) {
db.set(&key, &[])?;
}
Ok(())
}
fn remove(&self, db: &mut dyn WriteTransaction, id: RowNum, ob: Object) -> Result<()> {
for key in self.keys(id, ob) {
db.del(&key)?;
}
Ok(())
}
fn compare(&self, before: Object, after: Object) -> bool {
self.keys(0, before) == self.keys(0, after)
}
}
impl ValueSortComponent {
fn apply(&self, ob: Object, keys: &mut Vec<Vec<u8>>) {
match self.multi {
MultiBehaviour::First => {
if let Some(val) = self.path.get_matching_value(ob) {
for k in keys.iter_mut() {
k.extend(val);
}
} else {
keys.clear();
}
}
MultiBehaviour::ForEach => {
let mut keys_out = Vec::new();
for val in self.path.get_matching_values(ob) {
for mut k in keys.clone() {
k.extend(val);
keys_out.push(k);
}
}
*keys = keys_out
}
MultiBehaviour::Max => todo!(),
MultiBehaviour::Min => todo!(),
MultiBehaviour::Count => {
let count = self.path.get_matching_values(ob).len() as u32;
for k in keys.iter_mut() {
k.extend(count.to_be_bytes());
}
}
}
}
}
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