Added cache entry identifier.

src/morethantext/mod.rs

@@ -1,7 +1,7 @@
 pub mod error;
 
 use async_std::{
-    fs::create_dir,
+    fs::{create_dir, write},
     path::Path,
     sync::{Arc, Mutex},
 };
@@ -16,6 +16,14 @@ enum CacheEntry {
     Raw(String),
 }
 
+impl CacheEntry {
+    fn entry_type(&self) -> String {
+        match self {
+            CacheEntry::Raw(_) => "raw".to_string(),
+        }
+    }
+}
+
 impl fmt::Display for CacheEntry {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
@@ -27,13 +35,14 @@ impl fmt::Display for CacheEntry {
 #[derive(Clone)]
 pub struct MoreThanText {
     cache: Arc<Mutex<HashMap<String, CacheEntry>>>,
+    dir: String,
 }
 
 impl MoreThanText {
     pub async fn new(dir: &str) -> Result<Self, DBError> {
         let data_dir = Path::new(dir).join(DATA);
         if !data_dir.is_dir().await {
-            match create_dir(data_dir).await {
+            match create_dir(&data_dir).await {
                 Ok(_) => (),
                 Err(err) => {
                     let mut error = DBError::new("failed to create data directory");
@@ -44,11 +53,14 @@ impl MoreThanText {
         }
         Ok(Self {
             cache: Arc::new(Mutex::new(HashMap::new())),
+            dir: data_dir.to_str().unwrap().to_string(),
         })
     }
 
     async fn add_entry(&self, entry: CacheEntry) -> String {
         let id: String = thread_rng().sample_iter(&Alphanumeric).take(32).collect();
+        let file = Path::new(&self.dir).join(&id);
+        write(file, "a").await.unwrap();
         let mut cache = self.cache.lock().await;
         cache.insert(id.clone(), entry);
         return id;
@@ -157,6 +169,8 @@ mod cache {
         let id = mtt.db.add_entry(expected).await;
         let output = mtt.db.get_entry(&id).await.unwrap();
         assert_eq!(output.to_string(), data);
+        let dfile = mtt.dir.path().join(DATA).join(&id);
+        assert!(dfile.is_file(), "Cache file should exist.");
     }
 
     #[async_std::test]
@@ -194,3 +208,14 @@ mod cache {
         }
     }
 }
+
+#[cfg(test)]
+mod cache_entry {
+    use super::*;
+
+    #[test]
+    fn raw_type() {
+        let holder = CacheEntry::Raw("nothing important".to_string());
+        assert_eq!(holder.entry_type(), "raw");
+    }
+}