mirror of
https://github.com/velocitatem/cvfs.git
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45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
from __future__ import annotations
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from typing import Iterable
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from .schema import PatchPayload, PatchOperation, StructuredDocument
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class PatchValidationError(ValueError):
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pass
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def validate_patchset(
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document: StructuredDocument,
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patches: Iterable[PatchPayload],
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*,
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max_changes: int = 12,
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max_growth_ratio: float = 1.45,
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) -> None:
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patch_list = list(patches)
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if len(patch_list) > max_changes:
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raise PatchValidationError(
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f"Patchset exceeds max changes ({len(patch_list)} > {max_changes})"
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)
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block_map = {block.path: block for block in document.blocks}
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for patch in patch_list:
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block = block_map.get(patch.target_path)
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if not block:
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raise PatchValidationError(
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f"Target path {patch.target_path} does not exist in base document"
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)
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if patch.operation == PatchOperation.REPLACE_TEXT:
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if not patch.new_value:
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raise PatchValidationError("replace_text requires new_value")
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baseline = len(block.text.strip()) or 1
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if len(patch.new_value.strip()) / baseline > max_growth_ratio:
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raise PatchValidationError("Patch grows text beyond ATS safe threshold")
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if (
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patch.operation
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in {PatchOperation.REMOVE_BLOCK, PatchOperation.SUPPRESS_BLOCK}
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and block.block_type == "heading"
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):
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raise PatchValidationError(
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"Headings cannot be removed without manual confirmation"
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)
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