cmsmanage/membershipworks/forms.py

from django import forms
from django.contrib.auth.models import AbstractBaseUser

from membershipworks.models import EventExt


class EventInvoiceForm(forms.Form):
    reviewed_invoice = forms.BooleanField(
        label="I have reviewed this invoice and confirm that the course information, materials fee, course fees, enrollment information, invoice amount and all other details are correct.",
        help_text='Please contact us at <a href="mailto:info@claremontmakerspace.org">info@claremontmakerspace.org</a> if corrections are required.',
        required=True,
    )
    verified_payment_and_contact = forms.BooleanField(
        label="I have verified my contact and payment information.",
        help_text='You can <a href="https://claremontmakerspace.org/membersonly/">change your payment information here</a>. It may take up to an hour for your changes to take effect.',
        required=True,
    )

    def __init__(self, *args, event: EventExt, user: AbstractBaseUser, **kwargs):
        self.event = event
        self.user = user
        super().__init__(*args, **kwargs)

    def clean(self):
        if hasattr(self.event, "invoice") is not None:
            raise forms.ValidationError("An invoice was already created!")

        if not self.event.ready_for_invoice:
            raise forms.ValidationError(
                "Event missing required information to generate invoice"
            )

        if not self.event.user_is_instructor(self.user):
            raise forms.ValidationError(
                "You are not the listed as the instructor for this event"
            )

        if hasattr(self.event, "eventinvoice"):
            raise forms.ValidationError("Invoice already exists for this event")

        return super().clean()