feat: execute durable archive transfers

tests/test_qbittorrent.py

@@ -108,6 +108,11 @@ class QBittorrentReaderTests(unittest.TestCase):
             b"",     # stop before recheck
             b'{"total_downloaded":0}',
             b"",     # recheck
+            json.dumps([{
+                "hash": torrent_hash, "state": "stoppedDL",
+            }]).encode(),
+            b'{"total_downloaded":0}',
+            b'[{"index":0,"progress":0},{"index":1,"progress":0}]',
             json.dumps([{
                 "hash": torrent_hash, "state": "checkingUP",
             }]).encode(),
@@ -118,6 +123,7 @@ class QBittorrentReaderTests(unittest.TestCase):
             }]).encode(),
             b'{"total_downloaded":0}',
             b'[{"index":0,"progress":1},{"index":1,"progress":0}]',
+            b"",     # start after successful recheck
             b"",     # entry-only delete
         ]
         with tempfile.TemporaryDirectory() as directory:
@@ -140,6 +146,7 @@ class QBittorrentReaderTests(unittest.TestCase):
                 result = adapter.recheck_and_wait(
                     torrent_hash, [0], timeout=1, poll_interval=0
                 )
+                adapter.start(torrent_hash)
                 adapter.delete_entry(torrent_hash)
 
         self.assertEqual(result.final_state, "stoppedUP")
@@ -155,6 +162,7 @@ class QBittorrentReaderTests(unittest.TestCase):
             for call in calls[2:]
             if getattr(call, "data", None)
         ]
+        self.assertIn("id=0%7C1", form_bodies[0])
         self.assertIn("priority=0", form_bodies[0])
         self.assertIn("priority=1", form_bodies[1])
         self.assertIn("deleteFiles=false", form_bodies[-1])
@@ -182,6 +190,89 @@ class QBittorrentReaderTests(unittest.TestCase):
 
         self.assertTrue(opener.calls[-1].full_url.endswith("/torrents/pause"))
 
+    def test_start_falls_back_to_qbittorrent_4_resume_endpoint(self):
+        missing = error.HTTPError(
+            "http://qb/api/v2/torrents/start", 404, "not found", {}, None
+        )
+        responses = [b"Ok.", missing, b""]
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            password = root / "password"
+            password.write_text("secret", encoding="utf-8")
+            os.chmod(password, 0o600)
+            config = ServiceConfig(
+                "http://qb", PurePosixPath("/downloads"), root,
+                username="admin", password_file=password,
+            )
+            opener = _Opener(responses)
+            with patch(
+                "archive_clients.qbittorrent.request.build_opener",
+                return_value=opener,
+            ):
+                QBittorrentReader(config).start("a" * 40)
+
+        self.assertTrue(opener.calls[-1].full_url.endswith("/torrents/resume"))
+
+    def test_wait_until_present_polls_until_added_torrent_is_visible(self):
+        torrent_hash = "a" * 40
+        responses = [
+            b"Ok.",
+            b"[]",
+            json.dumps([{"hash": torrent_hash}]).encode(),
+        ]
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            password = root / "password"
+            password.write_text("secret", encoding="utf-8")
+            os.chmod(password, 0o600)
+            config = ServiceConfig(
+                "http://qb", PurePosixPath("/downloads"), root,
+                username="admin", password_file=password,
+            )
+            opener = _Opener(responses)
+            with patch(
+                "archive_clients.qbittorrent.request.build_opener",
+                return_value=opener,
+            ):
+                QBittorrentReader(config).wait_until_present(
+                    torrent_hash, timeout=1, poll_interval=0
+                )
+
+        self.assertEqual(len(opener.calls), 3)
+
+    def test_stopped_add_retries_while_recently_deleted_hash_is_busy(self):
+        torrent_hash = "a" * 40
+        responses = [
+            b"Ok.",
+            b"Fails.",
+            b"[]",
+            b"Ok.",
+            json.dumps([{"hash": torrent_hash}]).encode(),
+        ]
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            password = root / "password"
+            password.write_text("secret", encoding="utf-8")
+            os.chmod(password, 0o600)
+            config = ServiceConfig(
+                "http://qb", PurePosixPath("/downloads"), root,
+                username="admin", password_file=password,
+            )
+            opener = _Opener(responses)
+            with patch(
+                "archive_clients.qbittorrent.request.build_opener",
+                return_value=opener,
+            ):
+                QBittorrentReader(config).add_stopped_with_retry(
+                    b"torrent",
+                    "/downloads",
+                    torrent_hash,
+                    max_attempts=2,
+                    initial_delay=0,
+                )
+
+        self.assertEqual(len(opener.calls), 5)
+
 
 if __name__ == "__main__":
     unittest.main()