fix: LibTorrent not detecting that file has been deleted until LibTorrent Session is reinitialized / enhance download management with file existence checks and cleanup

src/core/network/libtorrent_int.py

@@ -1,4 +1,5 @@
 import time
+import os
 from core.utils.general.wrappers import run_thread
 from core.network.interface import get_interface_ip
 import threading
@@ -51,8 +52,26 @@ def add_download(magnet_uri, dl_path=state.download_path):
     init_session()
 
     if magnet_uri in state.active_downloads:
-        consoleLog("Skipping Downloading, download already running...")
-        return
+        try:
+            handle = state.active_downloads[magnet_uri]
+            status = handle.status()
+        except RuntimeError as e:
+            consoleLog(f"Error in LibTorrent Handle: {e}")
+
+        if status.has_metadata:
+            filepath = os.path.join(status.save_path, status.name)
+
+            if not os.path.exists(filepath):
+
+                consoleLog(f"File Deleted, redownloading: {status.name}")
+                state.dl_session.remove_torrent(handle)
+                del state.active_downloads[magnet_uri]
+            else:
+                consoleLog("Skipping Downloading, download already running...")
+                return False
+        else:
+            consoleLog("Skipping Downloading, download already running... ")
+            return False
 
     magnetdl = lt.parse_magnet_uri(magnet_uri)
     magnetdl.save_path = dl_path
@@ -62,6 +81,7 @@ def add_download(magnet_uri, dl_path=state.download_path):
     consoleLog(f"Added {magnet_uri} to downloads")
 
     run_thread(threading.Thread(target=dl_status_loop))
+    return True
 
 
 

src/core/network/libtorrent_misc.py

@@ -3,6 +3,7 @@ from core.utils.logging.logs import update_download_completed_by_hash
 from core.utils.logging.logs import consoleLog
 from plyer import notification
 import libtorrent as lt
+import os
 import time
 
 
@@ -58,3 +59,24 @@ def update_log(shutdown_event):
         except Exception:
             pass
         time.sleep(5)
+
+def check_deleted_files(shutdown_event):
+    while not shutdown_event.is_set():
+        try:
+            for magnet_uri, magnetdl in list(state.active_downloads.items()):
+                if isinstance(magnetdl, dict):
+                    continue
+                
+                status = magnetdl.status()
+                
+                if status.state == lt.torrent_status.seeding and status.has_metadata:
+                    file_path = os.path.join(status.save_path, status.name)
+
+                    if not os.path.exists(file_path):
+                        consoleLog(f"Registered File Deletion: {status.name}")
+                        state.dl_session.remove_torrent(magnetdl)
+                        del state.active_downloads[magnet_uri]
+
+        except Exception:
+            pass
+        time.sleep(5)

src/core/utils/network/download.py

@@ -19,8 +19,8 @@ def run_download(item, posts, post_titles):
     consoleLog(f"Selected URL: {post_url}")
     magnet_uri = get_magnet_link(post_url)
 
-    add_download(magnet_uri)
-    add_download_log(item, post_url, magnet_uri, False)
+    if add_download(magnet_uri):
+        add_download_log(item, post_url, magnet_uri, False)
 
 def run_download_direct(magnet_uri):
     consoleLog(f"Direct download: {magnet_uri[:60]}")

src/main.py

@@ -1,7 +1,7 @@
 from core.interface.gui import MainWindow, windowCloseHelper
 from core.utils.data.state import state
 from core.utils.logging.logs import consoleLog
-from core.network.libtorrent_misc import send_notification, update_log
+from core.network.libtorrent_misc import send_notification, update_log, check_deleted_files
 from core.utils.logging.logs import get_download_logs
 from core.utils.general.shutdown import closehelper, shutdown_event
 from core.utils.general.wrappers import run_thread
@@ -53,6 +53,8 @@ def main():
     consoleLog("Started Thread: update_log")
     run_thread(threading.Thread(target=check_completed, args=(downloads, state.autoresume)))
     consoleLog("Started Thread: check_completed")
+    run_thread(threading.Thread(target=check_deleted_files, args=(shutdown_event,), daemon=True))
+    consoleLog("Started Thread: check_deleted_files")
     check_downloads(downloads)
     elapsed = time.perf_counter() - start_time
     consoleLog(f"Initialization completed in {elapsed:.2f}s. Launching GUI")