Add finished field to Job resource

Author: rycwo

metafold/api.py

@@ -1,5 +1,20 @@
 from datetime import datetime, timezone
-from typing import Any, Union
+from functools import wraps
+from typing import Any, Callable, Optional, TypeVar, Union
+
+T = TypeVar("T")
+U = TypeVar("U")
+
+
+def optional(f: Callable[[T], U]) -> Callable[[Optional[T]], Optional[U]]:
+    """Decorator to generate converters that accept optional values."""
+    @wraps(f)
+    def decorator(v: Optional[T]) -> Optional[U]:
+        if v is None:
+            return v
+        return f(v)
+
+    return decorator
 
 
 def asdatetime(s: Union[str, datetime]) -> datetime:

metafold/jobs.py

@@ -1,6 +1,6 @@
 from attrs import field, frozen
 from datetime import datetime
-from metafold.api import asdatetime, asdict
+from metafold.api import asdatetime, asdict, optional
 from metafold.assets import Asset
 from metafold.client import Client
 from metafold.exceptions import PollTimeout
@@ -32,6 +32,10 @@ class Job:
     type: str
     parameters: dict[str, Any]
     created: datetime = field(converter=asdatetime)
+    finished: Optional[datetime] = field(
+        converter=lambda v: optional(asdatetime)(v),
+        default=None,
+    )
     state: str
     assets: list[Asset] = field(converter=_assets)
     meta: dict[str, Any]