Thomas K Ales [MSE]
50 lines
1.7 KiB
Python
Executable File
50 lines
1.7 KiB
Python
Executable File
"""Persisted user defaults (ports, scope IP, save directory).
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One flat JSON file, one dataclass. ``save()`` always writes every field, so
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a partial UI update can never silently drop another field's saved value
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(which is exactly what the old dict-based writer did to helios_port).
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"""
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from __future__ import annotations
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import json
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import logging
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from dataclasses import asdict, dataclass, fields
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from pathlib import Path
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logger = logging.getLogger(__name__)
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DEFAULTS_PATH = Path(__file__).resolve().parent.parent / "aui_defaults.json"
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@dataclass
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class ScanDefaults:
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t3r_port: str = "/dev/ttyUSB0"
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bbd_port: str = "/dev/ttyUSB1"
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oscope_ip: str = "192.168.0.1"
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save_dir: str = str(DEFAULTS_PATH.parent / "scans")
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helios_port: str = "/dev/ttyUSB2"
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burst_mode: bool = False
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strict_rows: bool = False
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@classmethod
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def load(cls, path: Path = DEFAULTS_PATH) -> "ScanDefaults":
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"""Load defaults, tolerating a missing/corrupt file and unknown keys."""
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if path.exists():
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try:
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with open(path) as f:
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data = json.load(f)
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known = {f.name for f in fields(cls)}
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return cls(**{k: v for k, v in data.items() if k in known})
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except (OSError, ValueError, TypeError) as e:
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logger.warning("Could not load %s (%s); using fallback defaults", path, e)
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inst = cls()
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inst.save(path)
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return inst
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def save(self, path: Path = DEFAULTS_PATH) -> None:
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try:
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with open(path, "w") as f:
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json.dump(asdict(self), f, indent=2)
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except OSError as e:
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logger.warning("Could not save defaults to %s: %s", path, e)
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