214 lines
7.9 KiB
Python
214 lines
7.9 KiB
Python
"""
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PDF生成サービス
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Flutter参考プロジェクトの機能をPythonで実装
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"""
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import sys
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import os
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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from reportlab.pdfgen import canvas
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from reportlab.lib.pagesizes import A4
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from reportlab.lib.units import mm
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from reportlab.pdfbase import pdfmetrics
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from reportlab.pdfbase.ttfonts import TTFont
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from datetime import datetime
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from typing import Optional
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from models.invoice_models import Invoice, InvoiceItem
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import os
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class PdfGenerator:
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"""PDF生成サービス"""
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def __init__(self):
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self.output_dir = "generated_pdfs"
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os.makedirs(self.output_dir, exist_ok=True)
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# 日本語フォント登録（システムフォントを使用）
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try:
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pdfmetrics.registerFont(TTFont('Japanese', '/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf'))
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except:
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# フォールバック：デフォルトフォント
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pass
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def generate_invoice_pdf(self, invoice: Invoice, company_info: dict) -> Optional[str]:
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"""請求書PDFを生成
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Args:
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invoice: 伝票データモデル
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company_info: 自社情報 dict{name, address, phone, registration_number}
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Returns:
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生成されたPDFファイルパス、失敗時はNone
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"""
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try:
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# ファイル名生成: {会社ID}_{端末ID}_{連番}.pdf
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timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
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filename = f"{company_info.get('id', 'COMP')}_{timestamp}.pdf"
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filepath = os.path.join(self.output_dir, filename)
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# PDF生成
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c = canvas.Canvas(filepath, pagesize=A4)
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width, height = A4
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# 監査向けのメタ情報（バイナリ同一性は要求しない）
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try:
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c.setAuthor(company_info.get("id", ""))
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c.setTitle(f"{invoice.document_type.value} {invoice.invoice_number}")
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c.setSubject(getattr(invoice, "uuid", ""))
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keywords = []
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for key in ["payload_hash", "chain_hash", "node_id"]:
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v = getattr(invoice, key, None)
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if v:
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keywords.append(f"{key}={v}")
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if keywords:
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c.setKeywords(",".join(keywords))
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except Exception:
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pass
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# ヘッダー: 会社ロゴ・名前
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self._draw_header(c, invoice, company_info, width, height)
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# 顧客情報
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self._draw_customer_info(c, invoice, width, height)
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# 明細テーブル
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self._draw_items_table(c, invoice, width, height)
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# 合計金額
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self._draw_totals(c, invoice, width, height)
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# フッター: 登録番号など
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self._draw_footer(c, company_info, width)
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# payload_json をPDFに埋め込む（不可視テキストとして格納）
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try:
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payload_json = getattr(invoice, "payload_json", None)
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if payload_json:
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c.saveState()
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c.setFillColorRGB(1, 1, 1)
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c.setFont("Helvetica", 1)
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# PDFのどこかに確実に残す（見えない）
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c.drawString(1 * mm, 1 * mm, f"INVOICE_PAYLOAD_JSON:{payload_json}")
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c.restoreState()
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except Exception:
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pass
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c.save()
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return filepath
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except Exception as e:
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print(f"PDF生成エラー: {e}")
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return None
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def _draw_header(self, c: canvas.Canvas, invoice: Invoice, company_info: dict, width: float, height: float):
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"""ヘッダー描画"""
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# 帳票種類タイトル
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c.setFont("Helvetica-Bold", 24)
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title = invoice.document_type.value
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c.drawString(20*mm, height - 30*mm, title)
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# 自社情報
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c.setFont("Helvetica", 10)
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company_name = company_info.get('name', '自社名未設定')
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c.drawString(20*mm, height - 45*mm, f"{company_name}")
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# 日付・番号
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c.setFont("Helvetica", 10)
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date_str = invoice.date.strftime("%Y年%m月%d日")
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c.drawString(width - 80*mm, height - 30*mm, f"発行日: {date_str}")
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c.drawString(width - 80*mm, height - 40*mm, f"No. {invoice.invoice_number}")
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def _draw_customer_info(self, c: canvas.Canvas, invoice: Invoice, width: float, height: float):
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"""顧客情報描画"""
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y_pos = height - 70*mm
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c.setFont("Helvetica-Bold", 12)
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c.drawString(20*mm, y_pos, "御中:")
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c.setFont("Helvetica", 11)
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customer_name = invoice.customer.formal_name
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c.drawString(20*mm, y_pos - 8*mm, customer_name)
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if invoice.customer.address:
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c.setFont("Helvetica", 9)
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c.drawString(20*mm, y_pos - 16*mm, invoice.customer.address)
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def _draw_items_table(self, c: canvas.Canvas, invoice: Invoice, width: float, height: float):
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"""明細テーブル描画"""
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# テーブルヘッダー
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y_start = height - 110*mm
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col_x = [20*mm, 80*mm, 110*mm, 140*mm, 170*mm]
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# ヘッダーライン
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c.setFont("Helvetica-Bold", 10)
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headers = ["品名", "数量", "単価", "金額", "摘要"]
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for i, header in enumerate(headers):
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c.drawString(col_x[i], y_start, header)
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# 明細行
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c.setFont("Helvetica", 9)
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y_pos = y_start - 10*mm
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for item in invoice.items:
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c.drawString(col_x[0], y_pos, item.description[:20])
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c.drawRightString(col_x[1] + 20*mm, y_pos, str(item.quantity))
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c.drawRightString(col_x[2] + 20*mm, y_pos, f"¥{item.unit_price:,}")
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c.drawRightString(col_x[3] + 20*mm, y_pos, f"¥{item.subtotal:,}")
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y_pos -= 8*mm
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def _draw_totals(self, c: canvas.Canvas, invoice: Invoice, width: float, height: float):
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"""合計金額描画"""
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y_pos = height - 180*mm
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x_right = width - 40*mm
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c.setFont("Helvetica", 10)
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c.drawRightString(x_right, y_pos, f"小計: ¥{invoice.subtotal:,}")
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c.drawRightString(x_right, y_pos - 8*mm, f"消費税: ¥{invoice.tax:,}")
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c.setFont("Helvetica-Bold", 14)
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c.drawRightString(x_right, y_pos - 20*mm, f"合計: ¥{invoice.total_amount:,}")
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def _draw_footer(self, c: canvas.Canvas, company_info: dict, width: float):
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"""フッター描画"""
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y_pos = 30*mm
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c.setFont("Helvetica", 8)
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reg_num = company_info.get('registration_number', '')
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if reg_num:
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c.drawString(20*mm, y_pos, f"登録番号: {reg_num}")
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# 支払期限・備考
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c.drawString(20*mm, y_pos - 5*mm, "お支払期限: 月末まで")
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# 使用例
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if __name__ == "__main__":
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from models.invoice_models import Customer, InvoiceItem, DocumentType
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from datetime import datetime
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# サンプルデータ
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customer = Customer(1, "田中商事", "田中商事株式会社", "東京都千代田区", "03-1234-5678")
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invoice = Invoice(
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customer=customer,
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date=datetime.now(),
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items=[
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InvoiceItem("商品A", 2, 15000),
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InvoiceItem("商品B", 1, 30000),
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],
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document_type=DocumentType.INVOICE,
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)
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company = {
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'id': 'SAMPLE001',
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'name': 'サンプル株式会社',
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'registration_number': 'T1234567890123'
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}
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generator = PdfGenerator()
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pdf_path = generator.generate_invoice_pdf(invoice, company)
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if pdf_path:
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print(f"PDF生成成功: {pdf_path}")
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else:
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print("PDF生成失敗")
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