126 lines
4.6 KiB
Python
126 lines
4.6 KiB
Python
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"""Report generation: Excel and PDF export."""
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from io import BytesIO
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from decimal import Decimal
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from datetime import datetime
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from openpyxl import Workbook
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from openpyxl.styles import Font, Alignment
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from openpyxl.utils import get_column_letter
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# WeasyPrint optional for PDF
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try:
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from weasyprint import HTML, CSS
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HAS_WEASYPRINT = True
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except ImportError:
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HAS_WEASYPRINT = False
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async def build_excel_report(case, transactions: list) -> bytes:
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"""Build Excel workbook: summary sheet + transaction detail sheet. Returns file bytes."""
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wb = Workbook()
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ws_summary = wb.active
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ws_summary.title = "汇总"
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ws_summary.append(["案件编号", case.case_number])
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ws_summary.append(["受害人", case.victim_name])
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ws_summary.append(["总损失", str(case.total_loss)])
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ws_summary.append(["交易笔数", len(transactions)])
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total_out = sum(
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(t.amount if isinstance(t.amount, Decimal) else Decimal(str(t.amount)))
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for t in transactions
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if t.transaction_type in ("转出", "消费", "付款", "提现") or "转出" in (t.transaction_type or "") or "消费" in (t.transaction_type or "")
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)
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total_in = sum(
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(t.amount if isinstance(t.amount, Decimal) else Decimal(str(t.amount)))
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for t in transactions
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if t.transaction_type in ("转入", "收款", "充值") or "转入" in (t.transaction_type or "") or "收款" in (t.transaction_type or "")
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)
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ws_summary.append(["转出合计", str(total_out)])
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ws_summary.append(["转入合计", str(total_in)])
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ws_summary.append(["净损失", str(total_out - total_in)])
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for row in range(1, 8):
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ws_summary.cell(row=row, column=1).font = Font(bold=True)
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ws_detail = wb.create_sheet("交易明细")
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headers = ["APP来源", "类型", "金额", "币种", "对方名称", "对方账号", "订单号", "交易时间", "备注", "置信度"]
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ws_detail.append(headers)
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for t in transactions:
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ws_detail.append([
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t.app_source,
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t.transaction_type or "",
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str(t.amount),
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t.currency or "CNY",
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t.counterparty_name or "",
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t.counterparty_account or "",
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t.order_number or "",
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t.transaction_time.isoformat() if t.transaction_time else "",
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t.remark or "",
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t.confidence or "",
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])
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for col in range(1, len(headers) + 1):
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ws_detail.cell(row=1, column=col).font = Font(bold=True)
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for col in range(1, ws_detail.max_column + 1):
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ws_detail.column_dimensions[get_column_letter(col)].width = 16
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buf = BytesIO()
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wb.save(buf)
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buf.seek(0)
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return buf.getvalue()
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def _pdf_html(case, transactions: list) -> str:
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rows = []
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for t in transactions:
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time_str = t.transaction_time.strftime("%Y-%m-%d %H:%M") if t.transaction_time else ""
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rows.append(
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f"<tr><td>{t.app_source}</td><td>{t.transaction_type or ''}</td><td>{t.amount}</td>"
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f"<td>{t.counterparty_name or ''}</td><td>{t.counterparty_account or ''}</td><td>{time_str}</td></tr>"
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)
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table_rows = "\n".join(rows)
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return f"""
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<!DOCTYPE html>
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<html>
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<head><meta charset="utf-8"/><title>案件报告</title></head>
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<body>
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<h1>资金追踪报告</h1>
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<p><strong>案件编号：</strong>{case.case_number}</p>
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<p><strong>受害人：</strong>{case.victim_name}</p>
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<p><strong>总损失：</strong>{case.total_loss}</p>
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<p><strong>交易笔数：</strong>{len(transactions)}</p>
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<h2>交易明细</h2>
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<table border="1" cellpadding="4" cellspacing="0" style="border-collapse: collapse; width: 100%;">
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<thead><tr><th>APP</th><th>类型</th><th>金额</th><th>对方名称</th><th>对方账号</th><th>时间</th></tr></thead>
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<tbody>{table_rows}</tbody>
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</table>
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</body>
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</html>
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"""
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async def build_pdf_report(case, transactions: list) -> bytes:
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"""Build PDF report. Returns file bytes. Falls back to empty PDF if weasyprint not available."""
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if not HAS_WEASYPRINT:
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return b"%PDF-1.4 (WeasyPrint not installed)"
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html_str = _pdf_html(case, transactions)
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html = HTML(string=html_str)
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buf = BytesIO()
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html.write_pdf(buf)
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buf.seek(0)
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return buf.getvalue()
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async def build_excel_report_path(case, transactions: list, path: str) -> str:
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"""Write Excel to file path; return path."""
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data = await build_excel_report(case, transactions)
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with open(path, "wb") as f:
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f.write(data)
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return path
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async def build_pdf_report_path(case, transactions: list, path: str) -> str:
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"""Write PDF to file path; return path."""
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data = await build_pdf_report(case, transactions)
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with open(path, "wb") as f:
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f.write(data)
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return path
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