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use std::collections::HashMap;
#[derive(Debug, PartialEq, Clone)]
struct LevelNode<'a> {
name: Option<&'a str>,
next_lvs: HashMap<&'a str, LevelNode<'a>>,
}
impl<'a> LevelNode<'a> {
pub fn new(name: &'a str) -> Self {
Self {
name: Some(name),
next_lvs: HashMap::new(),
}
}
}
#[derive(Debug)]
pub struct Dmatcher<'a> {
root: LevelNode<'a>,
}
impl<'a> Dmatcher<'a> {
pub fn new() -> Self {
Self {
root: LevelNode {
name: None,
next_lvs: HashMap::new(),
},
}
}
#[cfg(test)]
fn get_root(&self) -> &LevelNode {
&self.root
}
pub fn insert_lines(&mut self, domain: &'a str) {
let lvs: Vec<&str> = domain.split('\n').collect();
for lv in lvs {
self.insert(lv);
}
}
pub fn insert(&mut self, domain: &'a str) {
let mut lvs: Vec<&str> = domain.split('.').collect();
lvs.reverse();
let mut ptr = &mut self.root;
for lv in lvs {
if lv == "" {
continue;
}
ptr = ptr.next_lvs.entry(lv).or_insert(LevelNode::new(lv));
}
}
pub fn contains(&self, domain: &str) -> bool {
let mut lvs: Vec<&str> = domain.split('.').collect();
lvs.reverse();
let mut ptr = &self.root;
for lv in lvs {
if ptr.next_lvs.len() == 0 {
break;
}
ptr = match ptr.next_lvs.get(lv) {
Some(v) => v,
None => return false,
};
}
true
}
}
#[cfg(test)]
mod tests {
use super::{Dmatcher, LevelNode};
use std::collections::HashMap;
#[test]
fn contains() {
let mut matcher = Dmatcher::new();
matcher.insert("apple.com");
matcher.insert("apple.cn");
assert_eq!(matcher.contains("store.apple.com"), true);
assert_eq!(matcher.contains("baidu"), false);
assert_eq!(matcher.contains("你好.store.www.apple.com"), true);
}
#[test]
fn insertion() {
let mut matcher = Dmatcher::new();
matcher.insert("apple.com");
matcher.insert("apple.cn");
println!("{:?}", matcher.get_root());
assert_eq!(
matcher.get_root(),
&LevelNode {
name: None,
next_lvs: [
(
"cn",
LevelNode {
name: Some("cn"),
next_lvs: [(
"apple",
LevelNode {
name: Some("apple"),
next_lvs: []
.iter()
.cloned()
.collect::<HashMap<&str, LevelNode>>()
}
)]
.iter()
.cloned()
.collect::<HashMap<&str, LevelNode>>()
}
),
(
"com",
LevelNode {
name: Some("com"),
next_lvs: [(
"apple",
LevelNode {
name: Some("apple"),
next_lvs: []
.iter()
.cloned()
.collect::<HashMap<&str, LevelNode>>()
}
)]
.iter()
.cloned()
.collect::<HashMap<&str, LevelNode>>()
}
)
]
.iter()
.cloned()
.collect::<HashMap<&str, LevelNode>>()
}
);
}
}