75 lines
2.9 KiB
Python
75 lines
2.9 KiB
Python
"""
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GroceryLinkBuilder — affiliate deeplinks for missing ingredient grocery lists.
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Free tier: URL construction only (Amazon Fresh, Walmart, Instacart).
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Paid+: live product search API (stubbed — future task).
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Config (env vars, all optional — missing = retailer disabled):
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AMAZON_AFFILIATE_TAG — e.g. "circuitforge-20"
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INSTACART_AFFILIATE_ID — e.g. "circuitforge"
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WALMART_AFFILIATE_ID — e.g. "circuitforge" (Impact affiliate network)
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"""
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from __future__ import annotations
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import os
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from urllib.parse import quote_plus
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from app.models.schemas.recipe import GroceryLink
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def _amazon_link(ingredient: str, tag: str) -> GroceryLink:
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q = quote_plus(ingredient)
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url = f"https://www.amazon.com/s?k={q}&i=amazonfresh&tag={tag}"
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return GroceryLink(ingredient=ingredient, retailer="Amazon Fresh", url=url)
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def _walmart_link(ingredient: str, affiliate_id: str) -> GroceryLink:
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q = quote_plus(ingredient)
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# Walmart Impact affiliate deeplink pattern
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url = f"https://goto.walmart.com/c/{affiliate_id}/walmart?u=https://www.walmart.com/search?q={q}"
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return GroceryLink(ingredient=ingredient, retailer="Walmart Grocery", url=url)
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def _instacart_link(ingredient: str, affiliate_id: str) -> GroceryLink:
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q = quote_plus(ingredient)
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url = f"https://www.instacart.com/store/s?k={q}&aff={affiliate_id}"
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return GroceryLink(ingredient=ingredient, retailer="Instacart", url=url)
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class GroceryLinkBuilder:
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def __init__(self, tier: str = "free", has_byok: bool = False) -> None:
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self._tier = tier
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self._has_byok = has_byok
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self._amazon_tag = os.environ.get("AMAZON_AFFILIATE_TAG", "")
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self._instacart_id = os.environ.get("INSTACART_AFFILIATE_ID", "")
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self._walmart_id = os.environ.get("WALMART_AFFILIATE_ID", "")
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def build_links(self, ingredient: str) -> list[GroceryLink]:
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"""Build affiliate deeplinks for a single ingredient.
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Free tier: URL construction only.
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Paid+: would call live product search APIs (stubbed).
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"""
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if not ingredient.strip():
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return []
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links: list[GroceryLink] = []
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if self._amazon_tag:
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links.append(_amazon_link(ingredient, self._amazon_tag))
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if self._walmart_id:
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links.append(_walmart_link(ingredient, self._walmart_id))
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if self._instacart_id:
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links.append(_instacart_link(ingredient, self._instacart_id))
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# Paid+: live API stub (future task)
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# if self._tier in ("paid", "premium") and not self._has_byok:
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# links.extend(self._search_kroger_api(ingredient))
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return links
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def build_all(self, ingredients: list[str]) -> list[GroceryLink]:
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"""Build links for a list of ingredients."""
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links: list[GroceryLink] = []
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for ingredient in ingredients:
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links.extend(self.build_links(ingredient))
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return links
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