108 lines
2.1 KiB
Rust
108 lines
2.1 KiB
Rust
mod cache;
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mod error;
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mod store;
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use async_std::{
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channel::{unbounded, Sender},
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path::PathBuf,
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task::spawn,
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};
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use cache::Cache;
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use error::{ErrorCode, MTTError};
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use store::Store;
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const ENTRY: &str = "EntryPoint";
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#[derive(Debug)]
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pub struct CacheGet {
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id: String,
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result: Sender<FromCache>,
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}
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#[derive(Debug)]
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pub enum ToCache {
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Get(CacheGet),
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}
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#[derive(Debug)]
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pub enum FromCache {
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Str(Store),
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Error(MTTError),
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}
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#[derive(Clone, Debug)]
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struct Data<D> {
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id: Option<String>,
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data: Option<D>,
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}
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impl<D> Data<D> {
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fn from_id<S>(id: S) -> Self
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where
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S: Into<String>,
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{
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Self {
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id: Some(id.into()),
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data: None,
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}
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}
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}
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#[derive(Clone)]
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pub struct MoreThanText {
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to_cache: Sender<ToCache>,
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entry: Data<Store>,
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}
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impl MoreThanText {
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fn new(to_cache: Sender<ToCache>) -> Self {
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Self {
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to_cache: to_cache,
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entry: Data::from_id(ENTRY),
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}
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}
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async fn session(&self) -> Result<Store, MTTError> {
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let (s, r) = unbounded();
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let msg = CacheGet {
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id: ENTRY.to_string(),
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result: s,
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};
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self.to_cache.send(ToCache::Get(msg)).await.unwrap();
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match r.recv().await.unwrap() {
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FromCache::Str(store) => Ok(store),
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FromCache::Error(err) => Err(err),
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}
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}
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}
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#[cfg(test)]
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mod mtt {
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use super::*;
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use tempfile::tempdir;
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#[async_std::test]
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async fn create_new() {
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let dir = tempdir().unwrap();
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let mtt = start_db(dir.path()).await.unwrap();
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assert_eq!(mtt.entry.id, Some(ENTRY.to_string()));
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assert!(mtt.entry.data.is_none());
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let store = mtt.session().await.unwrap();
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let expected: Vec<String> = Vec::new();
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assert_eq!(store.list(), expected);
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}
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}
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pub async fn start_db<P>(dir: P) -> Result<MoreThanText, MTTError>
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where
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P: Into<PathBuf>,
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{
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let path = dir.into();
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let (s, r) = unbounded();
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spawn(async move {
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let cache = Cache::new(path).await;
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cache.listen(r).await;
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});
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Ok(MoreThanText::new(s))
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}
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