Removed duplicate ids.

src/morethantext/mod.rs

@@ -67,9 +67,15 @@ impl MoreThanText {
     }
 
     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, entry.to_bytes()).await.unwrap();
+        let mut id: String = "".to_string();
+        let mut dup = true;
+        while dup {
+            id = thread_rng().sample_iter(&Alphanumeric).take(32).collect();
+            dup = Path::new(&self.dir).join(&id).as_path().exists().await;
+        }
+        write(Path::new(&self.dir).join(&id), entry.to_bytes())
+            .await
+            .unwrap();
         let mut cache = self.cache.lock().await;
         cache.insert(id.clone(), entry);
         return id;
@@ -161,7 +167,7 @@ mod cache {
     use setup::MTT;
 
     #[async_std::test]
-    async fn ids_are_random() {
+    async fn entry_ids_are_random() {
         let mtt = MTT::new().await;
         let data1 = CacheEntry::Raw("one".to_string());
         let data2 = CacheEntry::Raw("two".to_string());