services.py

import re

def is_stammering(text: str) -> bool:
    """
    Detects non-natural repetitions in translated text.
    Meets Advanced Functional Specification[cite: 34, 35].
    """
    if not text:
        return False

    # 1. Detect Character Elongation (e.g., "soooooooooo...")
    # Matches any character repeated 10 or more times [cite: 35]
    if re.search(r'(.)\1{9,}', text):
        return True

    # 2. Detect Word/Phrase Repetition (e.g., "station station")
    # Standard NLP approach for repetition [cite: 35]
    words = re.findall(r'\w+', text.lower())
    
    # Check sequences of 1 to 4 words repeating consecutively
    for n in range(1, 5):
        for i in range(len(words) - 2 * n + 1):
            segment1 = words[i : i + n]
            segment2 = words[i + n : i + 2 * n]
            
            if segment1 == segment2:
                return True
                
    return False