fix weird end-of-file bug by having downloaders use inotify to directly track changes

src/state.rs

@@ -1,6 +1,6 @@
 use std::{collections::HashMap, io::ErrorKind};
 
-use log::{error, info, warn, debug};
+use log::{debug, error, info, warn};
 use tokio::{
     fs::File,
     io::{AsyncReadExt, AsyncWriteExt},
@@ -52,7 +52,7 @@ pub(crate) mod timestamp {
 }
 
 async fn is_valid_entry(key: &str, info: &DownloadableFile) -> bool {
-    if !crate::util::is_ascii_alphanumeric(&key) {
+    if !crate::util::is_ascii_alphanumeric(key) {
         error!("Invalid key in persistent storage: {}", key);
         return false;
     }
@@ -142,10 +142,4 @@ impl PersistentState {
         self.0.remove(key);
         self.save().await
     }
-
-    pub(crate) fn remove_uploader(&mut self, key: &str) {
-        if let Some(f) = self.0.get_mut(key) {
-            f.uploader.take();
-        }
-    }
 }