| """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'<rect x="70" y="{40 + jitter}" width="180" height="{220 - jitter}" rx="10" fill="{light}"/>' |
| f'<rect x="82" y="{54 + jitter}" width="156" height="92" rx="6" fill="{mid}"/>' |
| f'<rect x="82" y="{158 + jitter}" width="156" height="{88 - jitter}" rx="6" fill="{mid}"/>' |
| f'<rect x="156" y="{40 + jitter}" width="8" height="{220 - jitter}" fill="{edge}"/>' |
| f'<rect x="100" y="{92 + jitter}" width="42" height="8" rx="4" fill="{edge}"/>' |
| ) |
| if category_id == "tools": |
| return ( |
| f'<rect x="72" y="{112 + jitter}" width="126" height="62" rx="12" fill="{dark}"/>' |
| f'<rect x="186" y="{124 + jitter}" width="58" height="38" rx="8" fill="{mid}"/>' |
| f'<path d="M104 {174 + jitter} l52 0 l10 74 l-72 0 z" fill="{light}"/>' |
| f'<rect x="236" y="{134 + jitter}" width="34" height="18" rx="4" fill="{edge}"/>' |
| f'<circle cx="122" cy="{143 + jitter}" r="12" fill="{light}"/>' |
| ) |
| if category_id in {"lawn-garden", "outdoor-living"}: |
| return ( |
| f'<path d="M60 {216 + jitter} q100 -96 200 0 z" fill="{dark}"/>' |
| f'<rect x="96" y="{132 + jitter}" width="128" height="60" rx="16" fill="{light}"/>' |
| f'<circle cx="104" cy="{224 + jitter}" r="24" fill="{edge}"/>' |
| f'<circle cx="216" cy="{224 + jitter}" r="24" fill="{edge}"/>' |
| f'<rect x="200" y="{88 + jitter}" width="14" height="56" rx="7" fill="{mid}"/>' |
| ) |
| if category_id in {"flooring", "building-supplies"}: |
| return ( |
| f'<rect x="54" y="{92 + jitter}" width="212" height="34" rx="4" fill="{light}"/>' |
| f'<rect x="54" y="{132 + jitter}" width="212" height="34" rx="4" fill="{mid}"/>' |
| f'<rect x="54" y="{172 + jitter}" width="212" height="34" rx="4" fill="{light}"/>' |
| f'<rect x="54" y="{212 + jitter}" width="212" height="34" rx="4" fill="{edge}"/>' |
| ) |
| if category_id in {"plumbing", "bathroom", "kitchen"}: |
| return ( |
| f'<path d="M132 {242 + jitter} l0 -96 q0 -52 52 -52 q46 0 46 46 l0 26"' |
| f' fill="none" stroke="{dark}" stroke-width="20" stroke-linecap="round"/>' |
| f'<rect x="104" y="{238 + jitter}" width="112" height="20" rx="8" fill="{mid}"/>' |
| f'<circle cx="132" cy="{126 + jitter}" r="16" fill="{light}"/>' |
| ) |
| if category_id == "lighting": |
| return ( |
| f'<path d="M160 {60 + jitter} l84 78 l-168 0 z" fill="{light}"/>' |
| f'<rect x="150" y="{138 + jitter}" width="20" height="52" fill="{mid}"/>' |
| f'<circle cx="160" cy="{212 + jitter}" r="34" fill="{dark}"/>' |
| f'<circle cx="160" cy="{212 + jitter}" r="18" fill="{_shade(light, 1.05)}"/>' |
| ) |
| if category_id == "paint": |
| return ( |
| f'<rect x="98" y="{100 + jitter}" width="124" height="146" rx="8" fill="{dark}"/>' |
| f'<rect x="98" y="{100 + jitter}" width="124" height="34" rx="8" fill="{mid}"/>' |
| f'<path d="M92 {104 + jitter} q68 -50 136 0" fill="none" stroke="{edge}" stroke-width="8"/>' |
| f'<rect x="122" y="{160 + jitter}" width="76" height="56" rx="4" fill="{light}"/>' |
| ) |
| if category_id in {"electrical", "hardware"}: |
| return ( |
| f'<rect x="92" y="{92 + jitter}" width="136" height="152" rx="12" fill="{light}"/>' |
| f'<circle cx="160" cy="{140 + jitter}" r="22" fill="{dark}"/>' |
| f'<rect x="140" y="{184 + jitter}" width="40" height="46" rx="6" fill="{mid}"/>' |
| f'<rect x="112" y="{112 + jitter}" width="16" height="16" rx="3" fill="{edge}"/>' |
| ) |
| return ( |
| f'<rect x="80" y="{80 + jitter}" width="160" height="164" rx="10" fill="{light}"/>' |
| f'<rect x="100" y="{104 + jitter}" width="120" height="56" rx="6" fill="{mid}"/>' |
| f'<rect x="100" y="{176 + jitter}" width="120" height="44" rx="6" fill="{edge}"/>' |
| ) |
|
|
|
|
| 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'<rect x="0" y="250" width="320" height="70" fill="{_shade(dark, 1.5)}"/>' |
| if view_index == 2 |
| else "" |
| ) |
|
|
| return ( |
| '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 320" ' |
| 'width="320" height="320" role="img" ' |
| f'aria-label="{_escape(title)}">' |
| f"<title>{_escape(title)}</title>" |
| f'<rect width="320" height="320" fill="{backdrop}"/>' |
| f"{context_floor}" |
| f"<g{rotation}>{_shape(str(product['category_id']), light, dark, jitter)}</g>" |
| f'<text x="160" y="300" text-anchor="middle" font-family="Helvetica, Arial, sans-serif"' |
| f' font-size="15" fill="{_shade(dark, 0.8)}">{_escape(label)}</text>' |
| "</svg>" |
| ) |
|
|
|
|
| def _escape(value: str) -> str: |
| return ( |
| value.replace("&", "&") |
| .replace("<", "<") |
| .replace(">", ">") |
| .replace('"', """) |
| ) |
|
|
