fix: [torrust#488] torrent without tracker keys for open tracker

When the tracker is open (public or public whitelisted) thre tracker
user's keys should not be included in the downloaded torrent file.

src/config.rs

@@ -144,6 +144,13 @@ impl Default for TrackerMode {
     }
 }
 
+impl TrackerMode {
+    #[must_use]
+    pub fn is_open(&self) -> bool {
+        matches!(self, TrackerMode::Public | TrackerMode::Whitelisted)
+    }
+}
+
 /// Configuration for the associated tracker.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Tracker {

src/services/torrent.rs

@@ -6,7 +6,7 @@ use serde_derive::{Deserialize, Serialize};
 
 use super::category::DbCategoryRepository;
 use super::user::DbUserRepository;
-use crate::config::Configuration;
+use crate::config::{Configuration, TrackerMode};
 use crate::databases::database::{Database, Error, Sorting};
 use crate::errors::ServiceError;
 use crate::models::category::CategoryId;
@@ -258,21 +258,30 @@ impl Index {
 
         let tracker_url = self.get_tracker_url().await;
 
-        // Add personal tracker url or default tracker url
+        if self.get_tracker_mode().await.is_open() {
+            // We dont' include tracker keys
+            torrent.announce = Some(tracker_url);
+            return Ok(torrent);
+        }
+
         match opt_user_id {
             Some(user_id) => {
+                // Authenticated user -> include tracker keys
                 let personal_announce_url = self
                     .tracker_service
                     .get_personal_announce_url(user_id)
                     .await
                     .unwrap_or(tracker_url);
+
                 torrent.announce = Some(personal_announce_url.clone());
+
                 if let Some(list) = &mut torrent.announce_list {
                     let vec = vec![personal_announce_url];
                     list.insert(0, vec);
                 }
             }
             None => {
+                // Unauthenticated user -> dont' include tracker keys
                 torrent.announce = Some(tracker_url);
             }
         }
@@ -513,6 +522,11 @@ impl Index {
         let settings = self.configuration.settings.read().await;
         settings.tracker.url.clone()
     }
+
+    async fn get_tracker_mode(&self) -> TrackerMode {
+        let settings = self.configuration.settings.read().await;
+        settings.tracker.mode.clone()
+    }
 }
 
 pub struct DbTorrentRepository {