62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
# This file is part of Tryton. The COPYRIGHT file at the top level of
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# this repository contains the full copyright notices and license terms.
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from io import BytesIO
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from PyPDF2 import PdfFileReader, PdfFileWriter
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from trytond.pool import Pool, PoolMeta
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from trytond.report import Report
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from trytond.transaction import Transaction
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class Invoice(metaclass=PoolMeta):
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__name__ = 'account.invoice'
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@classmethod
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def _execute(cls, records, header, data, action):
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pool = Pool()
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Watermark = pool.get('account.invoice.watermark', type='report')
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format_, data = super()._execute(records, header, data, action)
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if format_ == 'pdf':
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invoice, = records
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report_id = cls.get_report_id(invoice)
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if report_id is not None:
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if invoice.party.lang:
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language = invoice.party.lang.code
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else:
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language = Transaction().language
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with Transaction().set_context(language=language):
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_, watermark, _, _ = Watermark.execute([invoice.id], {
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'action_id': report_id,
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})
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data = cls.merge(data, watermark)
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return format_, data
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@classmethod
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def get_report_id(cls, invoice):
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pool = Pool()
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ModelData = pool.get('ir.model.data')
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if invoice.state == 'paid':
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return ModelData.get_id(
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'account_invoice_watermark', 'report_invoice_watermark_paid')
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elif invoice.state == 'draft':
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return ModelData.get_id(
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'account_invoice_watermark', 'report_invoice_watermark_draft')
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@classmethod
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def merge(cls, invoice, watermark):
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output = PdfFileWriter()
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invoice = PdfFileReader(BytesIO(invoice))
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watermark = PdfFileReader(BytesIO(watermark)).getPage(0)
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for i in range(invoice.getNumPages()):
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page = invoice.getPage(i)
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page.mergePage(watermark)
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output.addPage(page)
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data = BytesIO()
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output.write(data)
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return data.getvalue()
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class InvoiceWatermark(Report):
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__name__ = 'account.invoice.watermark'
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