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import re
import emoji
def prepare_tts_input_with_context(text: str) -> str:
"""
Prepares text for a TTS API by cleaning Markdown and adding minimal contextual hints
for certain Markdown elements like headers. Preserves paragraph separation.
Args:
text (str): The raw text containing Markdown or other formatting.
Returns:
str: Cleaned text with contextual hints suitable for TTS input.
"""
# Remove emojis
text = emoji.replace_emoji(text, replace='')
# Add context for headers
def header_replacer(match):
level = len(match.group(1)) # Number of '#' symbols
header_text = match.group(2).strip()
if level == 1:
return f"Title — {header_text}\n"
elif level == 2:
return f"Section — {header_text}\n"
else:
return f"Subsection — {header_text}\n"
text = re.sub(r"^(#{1,6})\s+(.*)", header_replacer, text, flags=re.MULTILINE)
# Announce links (currently commented out for potential future use)
# text = re.sub(r"\[([^\]]+)\]\((https?:\/\/[^\)]+)\)", r"\1 (link: \2)", text)
# Remove links while keeping the link text
text = re.sub(r"\[([^\]]+)\]\([^\)]+\)", r"\1", text)
# Describe inline code
text = re.sub(r"`([^`]+)`", r"code snippet: \1", text)
# Remove bold/italic symbols but keep the content
text = re.sub(r"(\*\*|__|\*|_)", '', text)
# Remove code blocks (multi-line) with a description
text = re.sub(r"```([\s\S]+?)```", r"(code block omitted)", text)
# Remove image syntax but add alt text if available
text = re.sub(r"!\[([^\]]*)\]\([^\)]+\)", r"Image: \1", text)
# Remove HTML tags
text = re.sub(r"</?[^>]+(>|$)", '', text)
# Normalize line breaks
text = re.sub(r"\n{2,}", '\n\n', text) # Ensure consistent paragraph separation
# Replace multiple spaces within lines
text = re.sub(r" {2,}", ' ', text)
# Trim leading and trailing whitespace from the whole text
text = text.strip()
return text
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