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use serde::{Deserialize, Serialize};
use crate::crdt::crdt::*;
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
pub struct Map<K, V> {
vals: Vec<(K, V)>,
}
impl<K, V> Map<K, V>
where
K: Clone + Ord,
V: Clone + Crdt,
{
pub fn new() -> Self {
Self { vals: vec![] }
}
pub fn put_mutator(k: K, v: V) -> Self {
Self { vals: vec![(k, v)] }
}
pub fn put(&mut self, k: K, v: V) {
self.merge(&Self::put_mutator(k, v));
}
pub fn clear(&mut self) {
self.vals.clear();
}
pub fn get(&self, k: &K) -> Option<&V> {
match self.vals.binary_search_by(|(k2, _)| k2.cmp(k)) {
Ok(i) => Some(&self.vals[i].1),
Err(_) => None,
}
}
pub fn items(&self) -> &[(K, V)] {
&self.vals[..]
}
pub fn len(&self) -> usize {
self.vals.len()
}
pub fn is_empty(&self) -> bool {
self.len() == 0
}
}
impl<K, V> Crdt for Map<K, V>
where
K: Clone + Ord,
V: Clone + Crdt,
{
fn merge(&mut self, other: &Self) {
for (k, v2) in other.vals.iter() {
match self.vals.binary_search_by(|(k2, _)| k2.cmp(k)) {
Ok(i) => {
self.vals[i].1.merge(v2);
}
Err(i) => {
self.vals.insert(i, (k.clone(), v2.clone()));
}
}
}
}
}
impl<K, V> Default for Map<K, V>
where
K: Clone + Ord,
V: Clone + Crdt,
{
fn default() -> Self {
Self::new()
}
}