59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
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import string
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import re
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import random
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from dbsettings.functions import getValue
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import qrcode
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QRCODE_CONTENT = """
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BCD
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002
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1
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SCT
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%s
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%s
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%s
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%s%s
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%s
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%s
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%s
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%s
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""".strip()
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def generate_rf(reference):
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reference = str(reference).upper().zfill(21) + "RF00"
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pattern = re.compile("[A-Z0-9]+")
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if not pattern.fullmatch(reference):
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raise ValueError("Not a valid reference: %s – may only contain 0-9 and A-Z!")
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code = ""
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chars = string.digits + string.ascii_uppercase
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for char in reference:
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code += str(chars.index(char))
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remainder = int(code) % 97
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checksum = 98 - remainder
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return "RF%i%s" % (checksum, reference[:-4])
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def generate_reference(length=21):
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return "".join([random.SystemRandom().choice(string.digits + string.ascii_uppercase) for i in range(length)])
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def generate_qrcode(amount, iban="", recipient="", bic="", reference="", currency="EUR", message="", purpose="", notice=""):
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content = QRCODE_CONTENT % (
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bic or getValue("sepa.bic", ""),
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recipient or getValue("sepa.account_holder", ""),
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iban or getValue("sepa.iban"),
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currency,
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"{:0.2f}".format(float(amount)).rstrip("0"),
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purpose,
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reference if (not reference) or str(reference).startswith("RF") or len(str(reference)) > 21 else generate_rf(reference),
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message,
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notice
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)
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return qrcode.make(content)
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