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use std::collections::HashMap;
use actix::prelude::*;
use super::messages::*;
use super::Save;
use crate::errors::*;
#[derive(Clone, Default)]
pub struct HashCache(HashMap<String, u32>);
impl HashCache {
fn save(&mut self, config: Cache) -> CaptchaResult<()> {
self.0.insert(config.string, config.difficulty_factor);
Ok(())
}
fn retrive(&mut self, string: String) -> CaptchaResult<Option<u32>> {
if let Some(difficulty_factor) = self.remove(&string) {
Ok(Some(difficulty_factor.to_owned()))
} else {
Ok(None)
}
}
fn remove(&mut self, string: &str) -> Option<u32> {
self.0.remove(string)
}
}
impl Save for HashCache {}
impl Actor for HashCache {
type Context = Context<Self>;
}
impl Handler<Cache> for HashCache {
type Result = MessageResult<Cache>;
fn handle(&mut self, msg: Cache, ctx: &mut Self::Context) -> Self::Result {
use actix::clock::delay_for;
use std::time::Duration;
let addr = ctx.address();
let del_msg = DeleteString(msg.string.clone());
let duration: Duration = Duration::new(msg.duration.clone(), 0);
let wait_for = async move {
delay_for(duration).await;
addr.send(del_msg).await.unwrap().unwrap();
}
.into_actor(self);
ctx.spawn(wait_for);
MessageResult(self.save(msg))
}
}
impl Handler<DeleteString> for HashCache {
type Result = MessageResult<DeleteString>;
fn handle(&mut self, msg: DeleteString, _ctx: &mut Self::Context) -> Self::Result {
self.remove(&msg.0);
MessageResult(Ok(()))
}
}
impl Handler<Retrive> for HashCache {
type Result = MessageResult<Retrive>;
fn handle(&mut self, msg: Retrive, _ctx: &mut Self::Context) -> Self::Result {
MessageResult(self.retrive(msg.0))
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::mcaptcha::AddVisitorResult;
use crate::pow::PoWConfig;
async fn sleep(time: u64) {
use actix::clock::delay_for;
use std::time::Duration;
let duration: Duration = Duration::new(time, 0);
delay_for(duration).await;
}
#[actix_rt::test]
async fn hashcache_works() {
const DIFFICULTY_FACTOR: u32 = 54;
const DURATION: u64 = 5;
let addr = HashCache::default().start();
let pow: PoWConfig = PoWConfig::new(DIFFICULTY_FACTOR);
let visitor_result = AddVisitorResult {
difficulty_factor: DIFFICULTY_FACTOR,
duration: DURATION,
};
let string = pow.string.clone();
let msg = Cache::new(&pow, &visitor_result);
addr.send(msg).await.unwrap().unwrap();
let cache_difficulty_factor = addr.send(Retrive(string.clone())).await.unwrap().unwrap();
assert_eq!(DIFFICULTY_FACTOR, cache_difficulty_factor.unwrap());
sleep(DURATION + DURATION).await;
let expired_string = addr.send(Retrive(string)).await.unwrap().unwrap();
assert_eq!(None, expired_string);
}
}