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d4f9223842
Co-authored-by: Matsu <matias.huhta@n8n.io> Co-authored-by: Elias Meire <elias@meire.dev> Co-authored-by: Iván Ovejero <ivov.src@gmail.com> Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com> Co-authored-by: Dawid Myslak <dawid.myslak@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>
32 lines
1.0 KiB
Python
32 lines
1.0 KiB
Python
import re
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import string
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from typing import Iterator
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from src.constants import BLOCKED_ATTRIBUTES, BLOCKED_NAMES
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_FORMATTER = string.Formatter()
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_FIELD_ATTR_PATTERN = re.compile(r"\.(\w+)")
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_FIELD_SUBSCRIPT_PATTERN = re.compile(r"\[(['\"]?)(\w+)\1\]")
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def find_blocked_format_tokens(template: str) -> Iterator[str]:
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try:
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parsed = list(_FORMATTER.parse(template))
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except (ValueError, IndexError):
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return
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for _literal, field_name, format_spec, _conversion in parsed:
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if field_name is not None:
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for attr_match in _FIELD_ATTR_PATTERN.finditer(field_name):
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attr = attr_match.group(1)
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if attr in BLOCKED_ATTRIBUTES or attr in BLOCKED_NAMES:
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yield attr
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for subscript_match in _FIELD_SUBSCRIPT_PATTERN.finditer(field_name):
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key = subscript_match.group(2)
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if key in BLOCKED_ATTRIBUTES or key in BLOCKED_NAMES:
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yield key
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if format_spec:
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yield from find_blocked_format_tokens(format_spec)
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