fix newer versions of rtorrent (#549)

Closes https://github.com/calibrain/shelfmark/issues/534

This pull request enhances the rTorrent client testing and
implementation by adding more robust checks for directory paths and
improving how the base path is retrieved. The main focus is on verifying
and obtaining the correct download and base directories for torrents.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

scripts/test_clients.py

@@ -434,6 +434,10 @@ def test_rtorrent():
         version = client.system.library_version()
         print(f"  Connected to rTorrent {version}")
 
+        # default download directory test
+        default_dir = client.directory.default()
+        print(f"  Default download directory: {default_dir}")
+
         # Get torrent list
         torrents = client.download_list()
         print(f"  Active torrents: {len(torrents)}")
@@ -458,10 +462,13 @@ def test_rtorrent():
         torrent_id = "3B245504CF5F11BBDBE1201CEA6A6BF45AEE1BC0" # rtorrent uses uppercase hashes
         print(f"  Added test torrent: {torrent_id}")
 
+        torrents = client.download_list()
+        print(f"  Active torrents: {len(torrents)}")        
+
         torrent_list = client.d.multicall.filtered(
             "",
             "default",
-            f"equal=d.hash=,cat={torrent_id}",
+            f"equal={{d.hash=,cat={torrent_id}}}"
             "d.hash=",
             "d.state=",
             "d.completed_bytes=",
@@ -472,11 +479,22 @@ def test_rtorrent():
             "d.complete=",
         )
         torrent = torrent_list[0]
+
         if not torrent:
             print("  ERROR: Could not find added torrent in list")
             return False
         
-        
+        # let's test the base path call
+        details = client.d.multicall.filtered(
+            "",
+            "default",
+            f"equal=d.hash=,cat={torrent_id}",
+            "d.base_path=",
+        )
+
+        base_path = details[0][0] if details else None
+
+        print(f"  Base path: {base_path}")
         client.d.erase(torrent_id)
         print("  Removed test torrent")