feat: create validated ZUGFeRD invoices in one console command

jr_einvoice/render.py

@@ -6,16 +6,20 @@ import shutil
 from jinja2 import Environment, FileSystemLoader, select_autoescape
 
 from .models import Invoice
-from .calc import compute_totals
+from .calc import compute_totals, line_net
 from .types import RenderResult
-from .utils import money_fmt
+from .utils import money_fmt, number_fmt
 
 def render_html(inv: Invoice, template_path: Path) -> str:
     env = Environment(
         loader=FileSystemLoader(str(template_path.parent)),
-        autoescape=select_autoescape(["html", "xml"]),
+        autoescape=select_autoescape(["html", "xml", "j2"]),
     )
     env.globals["money"] = lambda x: money_fmt(x, inv.meta.currency)
+    env.globals["number"] = number_fmt
+    env.filters["de_date"] = lambda d: d.strftime("%d.%m.%Y") if d else ""
+    env.globals["unit_label"] = lambda unit: {"HUR": "Std.", "C62": "Stück", "DAY": "Tage"}.get(unit, unit)
+    env.globals["price"] = lambda x: f"{number_fmt(x)} {inv.meta.currency}"
     tpl = env.get_template(template_path.name)
 
     totals = compute_totals(inv)
@@ -23,7 +27,7 @@ def render_html(inv: Invoice, template_path: Path) -> str:
     items = []
     for it in inv.items:
         d = it.model_dump()
-        d["line_total_net"] = float(it.quantity) * float(it.unit_price_net)
+        d["line_total_net"] = line_net(it)
         items.append(type("Obj", (), d))
 
     ctx = {
@@ -50,7 +54,7 @@ def render_pdf(html: str, out_pdf: Path, logger, prefer_weasyprint: bool = True,
         logger.info("Rendering PDF using WeasyPrint")
         try:
             from weasyprint import HTML  # type: ignore
-            HTML(string=html, base_url=base_url).write_pdf(str(out_pdf))
+            HTML(string=html, base_url=base_url).write_pdf(str(out_pdf), pdf_variant="pdf/a-3b")
             return RenderResult(ok=True, backend="weasyprint", path=out_pdf)
         except Exception as e:
             logger.exception("WeasyPrint rendering failed; trying wkhtmltopdf if available: %s", e)