Paprika MCP Server

"""Format fraction tool - converts fractions to Unicode characters.""" import unicodedata from typing import Any from mcp.types import TextContent def format_fraction(fraction_str: str) -> str: """Format a fraction string to unicode fraction characters. Args: fraction_str: Fraction in the form "1/4", "31/200", or already formatted like "¼" Returns: Unicode formatted fraction (e.g., "¼" or "³¹⁄₂₀₀") """ # Strip whitespace fraction_str = fraction_str.strip() # Check if it's already a unicode fraction - if so, return as-is # Unicode fractions are in these ranges: # U+00BC-00BE (¼ ½ ¾) # U+2150-215E (various fractions) # Also check for composed fractions (superscript + U+2044 + subscript) if any(unicodedata.category(c) in ("No",) or c == "\u2044" for c in fraction_str): return fraction_str # Map of common fractions to their unicode characters common_fractions = { "1/4": "¼", "1/2": "½", "3/4": "¾", "1/7": "⅐", "1/9": "⅑", "1/10": "⅒", "1/3": "⅓", "2/3": "⅔", "1/5": "⅕", "2/5": "⅖", "3/5": "⅗", "4/5": "⅘", "1/6": "⅙", "5/6": "⅚", "1/8": "⅛", "3/8": "⅜", "5/8": "⅝", "7/8": "⅞", } # Check if it's a common fraction if fraction_str in common_fractions: return common_fractions[fraction_str] # Parse the fraction if "/" not in fraction_str: raise ValueError("Fraction must contain a '/' character") parts = fraction_str.split("/") if len(parts) != 2: raise ValueError("Fraction must be in the form 'numerator/denominator'") numerator, denominator = parts # Validate that both parts are numbers try: int(numerator) int(denominator) except ValueError as e: raise ValueError("Numerator and denominator must be integers") from e # Build using superscript + fraction slash + subscript superscript_digits = str.maketrans("0123456789", "⁰¹²³⁴⁵⁶⁷⁸⁹") subscript_digits = str.maketrans("0123456789", "₀₁₂₃₄₅₆₇₈₉") superscript_num = numerator.translate(superscript_digits) subscript_den = denominator.translate(subscript_digits) fraction_slash = "\u2044" # U+2044 FRACTION SLASH return f"{superscript_num}{fraction_slash}{subscript_den}" async def format_fraction_tool(args: dict[str, Any]) -> list[TextContent]: """Format a fraction to unicode.""" fraction_str = args["fraction"] try: formatted = format_fraction(fraction_str) return [ TextContent( type="text", text=f"Formatted fraction: {formatted}\n\nOriginal: {fraction_str}\nFormatted: {formatted}", ) ] except ValueError as e: return [ TextContent( type="text", text=f"Error formatting fraction '{fraction_str}': {str(e)}", ) ] # Tool definition TOOL_DEFINITION = { "name": "format_fraction", "description": ( "Format a fraction string to unicode fraction characters. " "Converts simple fractions like '1/4' to '¼' or complex ones like '31/200' to '³¹⁄₂₀₀'. " "Handles already-formatted unicode fractions and strips whitespace. " "This tool does not require server connectivity and can be used for testing." ), "inputSchema": { "type": "object", "properties": { "fraction": { "type": "string", "description": "Fraction in the form 'numerator/denominator' (e.g., '1/4', ' 31 / 200 '), or already formatted unicode", } }, "required": ["fraction"], }, }