35 lines
884 B
Python
35 lines
884 B
Python
from typing import Annotated
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from pydantic import BaseModel
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from mcp.server import MCPServer
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from mcp.server.mcpserver import Resolve
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mcp = MCPServer("Bookshop")
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INVENTORY = {"Dune": 7, "Neuromancer": 0}
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class Stock(BaseModel):
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title: str
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copies: int
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async def check_stock(title: str) -> Stock:
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return Stock(title=title, copies=INVENTORY.get(title, 0))
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async def estimate_delivery(stock: Annotated[Stock, Resolve(check_stock)]) -> str:
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return "tomorrow" if stock.copies > 0 else "in 2-3 weeks"
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@mcp.tool()
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async def order_book(
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title: str,
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stock: Annotated[Stock, Resolve(check_stock)],
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delivery: Annotated[str, Resolve(estimate_delivery)],
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) -> str:
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"""Order a book from the shop."""
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if stock.copies == 0:
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return f"{title!r} is on backorder; it would arrive {delivery}."
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return f"Ordered {title!r}; it arrives {delivery}."
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