"""Deterministic, locally generated product artwork.
The clone ships no source photography. Every product tile and gallery frame is
an SVG drawn here from the product's own row: the category supplies the two
palette colors, and the product id supplies a stable pseudo-variation so the
same product always renders the same picture. There is no randomness, so a
reset produces byte-identical images.
"""
from __future__ import annotations
from typing import Mapping
VIEWS = ("front", "angle", "detail")
def _spread(product_id: int, view_index: int, span: int) -> int:
"""Stable small offset in ``0..span-1`` derived from id and view."""
return ((product_id * 37) + (view_index * 11)) % span
def _shade(hex_color: str, factor: float) -> str:
value = hex_color.lstrip("#")
parts = [int(value[index : index + 2], 16) for index in (0, 2, 4)]
mixed = [max(0, min(255, int(part * factor))) for part in parts]
return "#{:02x}{:02x}{:02x}".format(*mixed)
def _shape(category_id: str, light: str, dark: str, jitter: int) -> str:
mid = _shade(dark, 1.25)
edge = _shade(dark, 0.75)
if category_id == "appliances":
return (
f''
f''
f''
f''
f''
)
if category_id == "tools":
return (
f''
f''
f''
f''
f''
)
if category_id in {"lawn-garden", "outdoor-living"}:
return (
f''
f''
f''
f''
f''
)
if category_id in {"flooring", "building-supplies"}:
return (
f''
f''
f''
f''
)
if category_id in {"plumbing", "bathroom", "kitchen"}:
return (
f''
f''
f''
)
if category_id == "lighting":
return (
f''
f''
f''
f''
)
if category_id == "paint":
return (
f''
f''
f''
f''
)
if category_id in {"electrical", "hardware"}:
return (
f''
f''
f''
f''
)
return (
f''
f''
f''
)
def product_svg(
product: Mapping[str, object],
category: Mapping[str, object],
view: str = "front",
) -> str:
view_index = VIEWS.index(view) if view in VIEWS else 0
product_id = int(product["id"])
light = str(category.get("art_light", "#d6d9dd"))
dark = str(category.get("art_dark", "#7b828b"))
jitter = _spread(product_id, view_index, 12) - 6
backdrop = "#ffffff" if view_index != 2 else _shade(light, 1.06)
label = str(product.get("brand", ""))
title = str(product.get("title", ""))
rotation = ""
if view_index == 1:
rotation = ' transform="rotate(-8 160 160)"'
context_floor = (
f''
if view_index == 2
else ""
)
return (
'"
)
def _escape(value: str) -> str:
return (
value.replace("&", "&")
.replace("<", "<")
.replace(">", ">")
.replace('"', """)
)