111 lines
3.5 KiB
Python
111 lines
3.5 KiB
Python
"""Shared late-binding dependency seam for extracted dashboard routers.
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``hermes_cli/web_server.py`` owns all dashboard runtime state and most helper
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functions the route handlers call. Extracted ``APIRouter`` modules under
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``hermes_cli/web_routers/`` cannot import it at module import time (web_server
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imports them to mount them — a cycle) and must not copy its state (tests
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``monkeypatch.setattr(web_server, "_helper", ...)`` and expect that to win).
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Design: **late binding, state stays in web_server.** ``late(name)`` returns a
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proxy that resolves ``hermes_cli.web_server.<name>`` *at call time*, so
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monkeypatched replacements and module state are never frozen at import time.
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"""
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from __future__ import annotations
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import sys
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from typing import Any
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def _server():
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"""Return the live ``hermes_cli.web_server`` module (imported on demand)."""
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mod = sys.modules.get("hermes_cli.web_server")
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if mod is None: # pragma: no cover - routers are only mounted by web_server
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import hermes_cli.web_server as mod # type: ignore[no-redef]
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return mod
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def late(name: str):
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"""Late-binding proxy for a callable defined on ``web_server``."""
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def _proxy(*args: Any, **kwargs: Any):
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return getattr(_server(), name)(*args, **kwargs)
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_proxy.__name__ = name
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_proxy.__qualname__ = name
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return _proxy
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class LateState:
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"""Live proxy for module-level state owned by ``web_server``.
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Forwards every operation the extracted handlers perform — attribute access,
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item get/set/del, iteration, membership, ``len``/truthiness, ``with``-blocks
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(locks), rich comparisons (numeric limits) — to ``web_server.<name>``
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resolved at operation time. Some of that state is defined *after* the
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router's ``include_router`` point, so even a late module import would not
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see it; this proxy does.
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"""
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__slots__ = ("_name",)
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def __init__(self, name: str) -> None:
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object.__setattr__(self, "_name", name)
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def _target(self) -> Any:
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return getattr(_server(), object.__getattribute__(self, "_name"))
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def __getattr__(self, attr: str) -> Any:
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return getattr(self._target(), attr)
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def __getitem__(self, key: Any) -> Any:
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return self._target()[key]
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def __setitem__(self, key: Any, value: Any) -> None:
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self._target()[key] = value
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def __delitem__(self, key: Any) -> None:
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del self._target()[key]
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def __contains__(self, item: Any) -> bool:
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return item in self._target()
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def __iter__(self):
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return iter(self._target())
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def __len__(self) -> int:
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return len(self._target())
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def __bool__(self) -> bool:
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return bool(self._target())
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def __enter__(self):
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return self._target().__enter__()
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def __exit__(self, *exc):
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return self._target().__exit__(*exc)
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def __eq__(self, other: Any) -> bool:
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return self._target() == other
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def __ne__(self, other: Any) -> bool:
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return self._target() != other
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def __lt__(self, other: Any) -> bool:
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return self._target() < other
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def __le__(self, other: Any) -> bool:
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return self._target() <= other
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def __gt__(self, other: Any) -> bool:
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return self._target() > other
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def __ge__(self, other: Any) -> bool:
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return self._target() >= other
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def __hash__(self) -> int:
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return hash(self._target())
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def __repr__(self) -> str: # pragma: no cover - debugging aid
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return f"<LateState {object.__getattribute__(self, '_name')} -> {self._target()!r}>"
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