forked from Hostea/dashboard
125 lines
3.8 KiB
Python
125 lines
3.8 KiB
Python
# Copyright © 2022 Aravinth Manivannan <realaravinth@batsense.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from enum import Enum, unique
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from urllib.parse import urlparse, urlunparse
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from datetime import datetime, timedelta, timezone
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from payments import get_payment_model, RedirectNeeded, PaymentStatus
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from django.core.mail import send_mail
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from django.urls import reverse
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from django.template.loader import render_to_string
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from django.contrib.auth.models import User
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from django.conf import settings
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from django.shortcuts import get_object_or_404
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from dash.models import Instance
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Payment = get_payment_model()
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def __get_delta():
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now = datetime.now(tz=timezone.utc)
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delta = now - timedelta(seconds=(60 * 60 * 24 * 30)) # one month
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return delta
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def get_invoice_link(payment: Payment):
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invoice_link = reverse("billing.invoice.details", args=(payment.public_ref,))
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parsed = urlparse(settings.PAYMENT_HOST)
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return urlunparse((parsed.scheme, parsed.netloc, invoice_link, "", "", ""))
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def payment_fullfilled(instance: Instance) -> bool:
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delta = __get_delta()
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payment = None
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for p in Payment.objects.filter(
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date__gt=(delta), instance_name=instance.name, vm_deleted=False
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):
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if p.status == PaymentStatus.CONFIRMED:
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return True
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return False
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@unique
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class GenerateInvoiceErrorCode(Enum):
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ALREADY_PAID = "already paid"
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DUPLICATE_PAYMENT = "DUPLICATE PAYMENT"
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def __str__(self) -> str:
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return self.name
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class GenerateInvoiceException(Exception):
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error: str
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code: GenerateInvoiceErrorCode
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def __init__(self, code: GenerateInvoiceErrorCode):
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self.error = str(code)
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self.code = code
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def __str__(self):
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return self.error
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def generate_invoice(instance: Instance) -> Payment:
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delta = __get_delta()
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payment = None
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for p in Payment.objects.filter(
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date__gt=(delta), instance_name=instance.name, vm_deleted=False
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):
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if p.status == PaymentStatus.CONFIRMED:
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raise GenerateInvoiceException(code=GenerateInvoiceErrorCode.ALREADY_PAID)
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if any([p.status == PaymentStatus.INPUT, p.status == PaymentStatus.WAITING]):
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if payment is None:
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payment = p
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else:
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print(f"Duplicate payment {p}, deleting in favor of {payment}")
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p.delete()
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if payment is None:
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print("Payment not found, generating new payment")
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payment = Payment.objects.create(
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variant="stripe", # this is the variant from PAYMENT_VARIANTS
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instance=instance,
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)
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invoice_link = get_invoice_link(payment=payment)
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ctx = {
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"username": instance.owned_by.username,
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"link": invoice_link,
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"payment": payment,
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}
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body = render_to_string(
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"billing/emails/payment-notification.txt",
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context=ctx,
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)
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email = instance.owned_by.email
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sender = settings.DEFAULT_FROM_EMAIL
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send_mail(
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subject="[Hostea] An invoice is generated for your Hostea VM",
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message=body,
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from_email=f"No reply Hostea<{sender}>", # TODO read from settings.py
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recipient_list=[email],
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)
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return payment
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