feat(insta-lab): card_renderer with Jinja + Playwright (1080x1350)
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100
insta-lab/app/card_renderer.py
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100
insta-lab/app/card_renderer.py
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"""Jinja → HTML → Playwright headless screenshot."""
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import asyncio
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import hashlib
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import json
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import logging
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import os
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import tempfile
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from typing import List
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from jinja2 import Environment, FileSystemLoader, select_autoescape
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from playwright.async_api import async_playwright
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from .config import CARDS_DIR, CARD_TEMPLATE_DIR
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from . import db
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logger = logging.getLogger(__name__)
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def _resolve_template_dir() -> str:
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"""Prefer config CARD_TEMPLATE_DIR if it exists; else fall back to in-repo templates/."""
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if os.path.isdir(CARD_TEMPLATE_DIR):
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return CARD_TEMPLATE_DIR
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return os.path.join(os.path.dirname(__file__), "templates")
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def _env() -> Environment:
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return Environment(
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loader=FileSystemLoader(_resolve_template_dir()),
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autoescape=select_autoescape(["html", "j2"]),
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)
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def _slate_dir(slate_id: int) -> str:
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out = os.path.join(CARDS_DIR, str(slate_id))
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os.makedirs(out, exist_ok=True)
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return out
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def _build_pages(slate: dict) -> List[dict]:
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cover = json.loads(slate["cover_copy"] or "{}")
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bodies = json.loads(slate["body_copies"] or "[]")
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cta = json.loads(slate["cta_copy"] or "{}")
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accent = cover.get("accent_color") or "#0F62FE"
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pages: List[dict] = []
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pages.append({
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"page_type": "cover", "page_no": 1, "total_pages": 10,
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"headline": cover.get("headline", ""), "body": cover.get("body", ""),
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"accent_color": accent, "cta": "",
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})
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for i, b in enumerate(bodies[:8]):
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pages.append({
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"page_type": "body", "page_no": i + 2, "total_pages": 10,
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"headline": b.get("headline", ""), "body": b.get("body", ""),
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"accent_color": accent, "cta": "",
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})
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pages.append({
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"page_type": "cta", "page_no": 10, "total_pages": 10,
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"headline": cta.get("headline", ""), "body": cta.get("body", ""),
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"accent_color": accent, "cta": cta.get("cta", ""),
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})
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return pages
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async def render_slate(slate_id: int, template: str = "default/card.html.j2") -> List[str]:
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slate = db.get_card_slate(slate_id)
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if not slate:
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raise ValueError(f"slate {slate_id} not found")
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env = _env()
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tmpl = env.get_template(template)
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pages = _build_pages(slate)
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out_dir = _slate_dir(slate_id)
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paths: List[str] = []
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async with async_playwright() as p:
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browser = await p.chromium.launch()
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try:
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ctx = await browser.new_context(viewport={"width": 1080, "height": 1350})
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page = await ctx.new_page()
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for spec in pages:
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html_str = tmpl.render(**spec)
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with tempfile.NamedTemporaryFile("w", suffix=".html", delete=False, encoding="utf-8") as f:
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f.write(html_str)
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html_path = f.name
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try:
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await page.goto(f"file://{html_path}", wait_until="networkidle")
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out_path = os.path.join(out_dir, f"{spec['page_no']:02d}.png")
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await page.screenshot(path=out_path, full_page=False, omit_background=False)
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with open(out_path, "rb") as fp:
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file_hash = hashlib.md5(fp.read()).hexdigest()
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db.add_card_asset(slate_id, spec["page_no"], out_path, file_hash)
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paths.append(out_path)
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finally:
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try:
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os.unlink(html_path)
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except OSError:
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pass
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finally:
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await browser.close()
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return paths
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55
insta-lab/app/templates/default/card.html.j2
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insta-lab/app/templates/default/card.html.j2
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<!DOCTYPE html>
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<html lang="ko">
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<head>
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<meta charset="UTF-8">
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<style>
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@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;700;900&display=swap');
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* { margin: 0; padding: 0; box-sizing: border-box; }
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html, body {
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width: 1080px; height: 1350px;
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font-family: 'Noto Sans KR', sans-serif;
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background: #F7F7FA; color: #14171A;
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}
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.card {
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width: 1080px; height: 1350px;
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padding: 80px 72px;
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display: flex; flex-direction: column; justify-content: space-between;
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background: linear-gradient(180deg, #FFFFFF 0%, #F7F7FA 100%);
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border-top: 16px solid {{ accent_color }};
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}
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.badge {
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display: inline-block; padding: 8px 20px; border-radius: 999px;
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background: {{ accent_color }}; color: #fff;
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font-size: 28px; font-weight: 700; letter-spacing: -0.02em;
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}
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.headline {
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font-size: {{ 96 if page_type == 'cover' else 72 }}px;
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font-weight: 900; line-height: 1.15; letter-spacing: -0.04em;
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margin-top: 32px;
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}
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.body {
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font-size: 40px; font-weight: 400; line-height: 1.55;
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margin-top: 40px; color: #2A2F35;
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white-space: pre-wrap;
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}
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.footer {
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display: flex; justify-content: space-between; align-items: center;
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font-size: 28px; color: #6B7280; font-weight: 500;
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}
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.cta { font-weight: 700; color: {{ accent_color }}; }
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</style>
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</head>
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<body>
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<div class="card">
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<div>
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<span class="badge">{{ page_type|upper }}</span>
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<h1 class="headline">{{ headline }}</h1>
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<p class="body">{{ body }}</p>
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</div>
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<div class="footer">
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<span>{{ page_no }} / {{ total_pages }}</span>
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{% if cta %}<span class="cta">{{ cta }}</span>{% endif %}
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</div>
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</div>
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</body>
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</html>
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48
insta-lab/tests/test_card_renderer.py
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48
insta-lab/tests/test_card_renderer.py
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import os
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import tempfile
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import pytest
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from app import db as db_module
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from app import card_renderer
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@pytest.fixture
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def tmp_db_and_dirs(monkeypatch, tmp_path):
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fd, path = tempfile.mkstemp(suffix=".db")
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os.close(fd)
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monkeypatch.setattr(db_module, "DB_PATH", path)
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monkeypatch.setattr(card_renderer, "CARDS_DIR", str(tmp_path / "cards"))
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db_module.init_db()
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yield path
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import gc
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gc.collect()
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for ext in ("", "-wal", "-shm"):
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try:
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os.remove(path + ext)
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except OSError:
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pass
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def _seed_slate() -> int:
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return db_module.add_card_slate({
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"keyword": "테스트",
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"category": "economy",
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"status": "draft",
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"cover_copy": {"headline": "커버 헤드라인", "body": "서브카피", "accent_color": "#0F62FE"},
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"body_copies": [{"headline": f"본문 {i+1}", "body": f"내용 {i+1}"} for i in range(8)],
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"cta_copy": {"headline": "마무리", "body": "감사합니다", "cta": "팔로우"},
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})
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@pytest.mark.asyncio
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async def test_render_slate_produces_ten_pngs(tmp_db_and_dirs):
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sid = _seed_slate()
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paths = await card_renderer.render_slate(sid)
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assert len(paths) == 10
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for p in paths:
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assert os.path.exists(p)
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assert os.path.getsize(p) > 1000 # > 1 KB sanity
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db_module.update_slate_status(sid, "rendered")
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assets = db_module.list_card_assets(sid)
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assert {a["page_index"] for a in assets} == set(range(1, 11))
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