implement ban Item, handle update results outside

src/ban.rs

@@ -2,6 +2,11 @@ use chrono::{DateTime, Local};
 use librqbit::dht::Id20;
 use std::{collections::HashMap, time::Duration};
 
+pub struct Item {
+    pub expires: DateTime<Local>,
+    pub info_hash: String,
+}
+
 pub struct Ban {
     index: HashMap<Id20, DateTime<Local>>,
     timeout: u64,
@@ -23,20 +28,23 @@ impl Ban {
         self.index.len()
     }
 
-    pub fn update(&mut self, time: DateTime<Local>) {
+    pub fn update(&mut self, time: DateTime<Local>) -> Vec<Item> {
+        let mut b = Vec::with_capacity(self.index.len());
         self.index.retain(|i, &mut expires| {
             if time > expires {
-                log::debug!(
-                    "remove ban for `{}` by the timeout expiration ({expires})",
-                    i.as_string()
-                );
+                b.push(Item {
+                    expires,
+                    info_hash: i.as_string(),
+                });
                 false
             } else {
                 true
             }
-        })
+        });
+        b
     }
 
+    /// * returns expiration time
     pub fn add(&mut self, key: Id20) -> DateTime<Local> {
         let t = Local::now() + Duration::from_secs(self.index.len() as u64 * self.timeout);
         assert!(self.index.insert(key, t).is_none());