Function _find_chapter_range

functions/function_calling/deep_research.py:195–235

Find the start and end indices (inclusive, exclusive) of a chapter. title_path is like "Chapter 1/Section 2"

(lines: List[str], title_path: str)

def _find_chapter_range(lines: List[str], title_path: str) -> Tuple[int, int]:
    """
    Find the start and end indices (inclusive, exclusive) of a chapter.
    title_path is like "Chapter 1/Section 2"
    """
    titles = [t.strip() for t in title_path.split("/")]
    current_level_idx = 0
    start_idx = -1
    
    # We need to find the sequence of headers
    search_start = 0
    
    for i, target_title in enumerate(titles):
        found = False
        
        for idx in range(search_start, len(lines)):
            level, text = _parse_header(lines[idx])
            if level > 0 and text == target_title:
                # Found the current segment
                search_start = idx + 1
                found = True
                if i == len(titles) - 1:
                    start_idx = idx
                    current_level_idx = level
                break
        
        if not found:
            return -1, -1

    if start_idx == -1:
        return -1, -1
        
    # Find end: next header of same or lower level (higher importance, smaller integer)
    end_idx = len(lines)
    for idx in range(start_idx + 1, len(lines)):
        level, _ = _parse_header(lines[idx])
        if level > 0 and level <= current_level_idx:
            end_idx = idx
            break
            
    return start_idx, end_idx


def report_read(