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mod display;
mod serialize;
use std::collections::BTreeMap;
#[repr(transparent)]
#[derive(Debug)]
pub struct TreeBag<H: Ord, T>(pub(crate) BTreeMap<H, Vec<T>>);
#[derive(Debug, Clone, Copy)]
pub enum Factor {
Under(usize),
Equal(usize),
Over(usize),
}
#[derive(Debug)]
pub struct Replicates<'a, H: Ord, T> {
tree: &'a TreeBag<H, T>,
factor: Factor,
}
#[derive(Debug)]
pub struct Fdupes;
#[derive(Debug)]
pub struct Machine;
#[derive(Debug)]
pub struct Display<'a, H: Ord, T, U: marker::OutputFormat> {
_marker: std::marker::PhantomData<&'a U>,
tree: &'a Replicates<'a, H, T>,
}
impl<H: Ord, T> TreeBag<H, T> {
pub fn duplicates(&self) -> Replicates<'_, H, T> {
Replicates {
tree: self,
factor: Factor::Over(1),
}
}
pub fn replicates(&self, factor: Factor) -> Replicates<'_, H, T> {
Replicates { tree: self, factor }
}
pub fn as_tree(&self) -> &BTreeMap<H, Vec<T>> {
&self.0
}
}
impl<H: Ord, T> Replicates<'_, H, T> {
pub fn iter(&self) -> impl Iterator<Item = &[T]> {
self.tree
.0
.values()
.filter(move |bucket| match self.factor {
Factor::Under(n) => bucket.len() < n,
Factor::Equal(n) => bucket.len() == n,
Factor::Over(n) => bucket.len() > n,
})
.map(AsRef::as_ref)
}
pub fn display<D: marker::OutputFormat>(&self) -> Display<'_, H, T, D> {
Display {
tree: self,
_marker: std::marker::PhantomData,
}
}
}
impl<H: Ord, T> std::iter::FromIterator<(H, T)> for TreeBag<H, T> {
fn from_iter<I: IntoIterator<Item = (H, T)>>(iter: I) -> Self {
let mut map: BTreeMap<H, Vec<T>> = BTreeMap::new();
for (hash, item) in iter {
map.entry(hash).or_default().push(item);
}
Self(map)
}
}
impl<H: Ord, T> AsRef<BTreeMap<H, Vec<T>>> for TreeBag<H, T> {
fn as_ref(&self) -> &BTreeMap<H, Vec<T>> {
self.as_tree()
}
}
impl<H: Ord, T> From<TreeBag<H, T>> for BTreeMap<H, Vec<T>> {
fn from(value: TreeBag<H, T>) -> Self {
value.0
}
}
impl<H: Ord, T> From<BTreeMap<H, Vec<T>>> for TreeBag<H, T> {
fn from(value: BTreeMap<H, Vec<T>>) -> Self {
Self(value)
}
}
pub mod marker {
pub trait OutputFormat {}
impl OutputFormat for super::Fdupes {}
impl OutputFormat for super::Machine {}
}