mirror of
https://github.com/TronoSfera/Law.git
synced 2026-05-18 18:13:46 +03:00
84 lines
2.8 KiB
Python
84 lines
2.8 KiB
Python
from __future__ import annotations
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from datetime import datetime
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from typing import Any
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import unicodedata
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def _ascii_text(value: Any) -> str:
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text = str(value or "")
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normalized = unicodedata.normalize("NFKD", text)
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return normalized.encode("ascii", "ignore").decode("ascii")
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def _escape_pdf_text(value: str) -> str:
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return value.replace("\\", "\\\\").replace("(", "\\(").replace(")", "\\)")
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def _build_content_stream(lines: list[str]) -> bytes:
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safe_lines = [_escape_pdf_text(_ascii_text(line)) for line in lines]
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if not safe_lines:
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safe_lines = ["Invoice"]
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parts = ["BT", "/F1 11 Tf", "50 800 Td"]
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for index, line in enumerate(safe_lines):
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if index == 0:
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parts.append(f"({line}) Tj")
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else:
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parts.append("T*")
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parts.append(f"({line}) Tj")
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parts.append("ET")
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return "\n".join(parts).encode("latin-1", errors="ignore")
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def build_invoice_pdf_bytes(
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*,
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invoice_number: str,
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amount: float,
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currency: str,
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status: str,
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issued_at: datetime | None,
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paid_at: datetime | None,
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payer_display_name: str,
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request_track_number: str,
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issued_by_name: str | None,
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requisites: dict[str, Any] | None,
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) -> bytes:
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lines = [
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f"Invoice: {invoice_number}",
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f"Request: {request_track_number}",
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f"Payer: {payer_display_name}",
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f"Amount: {amount:.2f} {currency}",
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f"Status: {status}",
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f"Issued at: {issued_at.isoformat() if issued_at else '-'}",
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f"Paid at: {paid_at.isoformat() if paid_at else '-'}",
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f"Issued by: {issued_by_name or '-'}",
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"Requisites:",
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]
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req = dict(requisites or {})
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if req:
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for key in sorted(req.keys()):
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lines.append(f"{key}: {req.get(key)}")
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else:
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lines.append("-")
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stream = _build_content_stream(lines)
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objects = [
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b"1 0 obj << /Type /Catalog /Pages 2 0 R >> endobj\n",
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b"2 0 obj << /Type /Pages /Kids [3 0 R] /Count 1 >> endobj\n",
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b"3 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 595 842] /Resources << /Font << /F1 4 0 R >> >> /Contents 5 0 R >> endobj\n",
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b"4 0 obj << /Type /Font /Subtype /Type1 /BaseFont /Helvetica >> endobj\n",
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f"5 0 obj << /Length {len(stream)} >> stream\n".encode("latin-1") + stream + b"\nendstream endobj\n",
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]
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body = b"%PDF-1.4\n"
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offsets = [0]
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for obj in objects:
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offsets.append(len(body))
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body += obj
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xref_offset = len(body)
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body += f"xref\n0 {len(objects)+1}\n".encode("latin-1")
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body += b"0000000000 65535 f \n"
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for offset in offsets[1:]:
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body += f"{offset:010d} 00000 n \n".encode("latin-1")
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body += f"trailer << /Size {len(objects)+1} /Root 1 0 R >>\nstartxref\n{xref_offset}\n%%EOF\n".encode("latin-1")
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return body
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