mirror of
https://github.com/complexcaresolutions/dak.c2s.git
synced 2026-03-17 23:03:41 +00:00
41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
"""Data validation functions for ICD codes and KVNR."""
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import re
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ICD_PATTERN = re.compile(r"^[A-Z]\d{2}(\.\d{1,2})?$")
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KVNR_PATTERN = re.compile(r"^[A-Z]\d{9}$")
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def validate_icd(code: str) -> str:
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"""Validate and normalize a single ICD code. Returns uppercase stripped code."""
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code = code.strip().upper()
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if not code:
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raise ValueError("Empty ICD code")
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if not ICD_PATTERN.match(code):
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raise ValueError(f"Invalid ICD code format: '{code}'")
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return code
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def split_icd_codes(raw: str) -> list[str]:
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"""Split a string of multiple ICD codes (comma or semicolon separated)."""
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if not raw or not raw.strip():
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return []
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# Split by comma, semicolon, or whitespace+comma combinations
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codes = re.split(r"[,;]\s*", raw.strip())
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return [c.strip() for c in codes if c.strip()]
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def normalize_icd_hauptgruppe(code: str) -> str:
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"""Extract hauptgruppe from ICD code: 'C50.1' -> 'C50'."""
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code = code.strip().upper()
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return code[:3] if len(code) >= 3 else code
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def validate_kvnr(kvnr: str) -> str:
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"""Validate KVNR format (letter + 9 digits). Returns stripped uppercase."""
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kvnr = kvnr.strip().upper()
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if not kvnr:
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raise ValueError("Empty KVNR")
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if not KVNR_PATTERN.match(kvnr):
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raise ValueError(f"Invalid KVNR format: '{kvnr}'")
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return kvnr
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