269 lines
7.9 KiB
Python
269 lines
7.9 KiB
Python
import pathlib
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from datetime import date
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import uuid
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from django.db import models
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from django.forms import ModelForm
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from django.core.validators import FileExtensionValidator
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from django.utils.translation import gettext as _
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from django.core.files.storage import Storage
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class Category(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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name = models.CharField(
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max_length=64, default=_("Category"), verbose_name=_("Name")
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)
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icon = models.CharField(max_length=64, default="folder", verbose_name=_("Icon"))
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budget = models.BooleanField(default=True, verbose_name=_("Budget"))
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def __str__(self):
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return self.name
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class Meta:
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ordering = ["name"]
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verbose_name = _("Category")
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verbose_name_plural = _("Categories")
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class CategoryForm(ModelForm):
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template_name = "main/form.html"
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class Meta:
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model = Category
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fields = ["name", "icon", "budget"]
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class Transaction(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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name = models.CharField(
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max_length=256, default=_("Transaction"), verbose_name=_("Name")
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)
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description = models.TextField(null=True, blank=True, verbose_name=_("Description"))
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value = models.DecimalField(
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max_digits=12, decimal_places=2, default=0, verbose_name=_("Value")
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)
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date = models.DateField(default=date.today, verbose_name=_("Date"))
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real_date = models.DateField(blank=True, null=True, verbose_name=_("Real date"))
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trader = models.CharField(
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max_length=128, blank=True, null=True, verbose_name=_("Trader")
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)
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payment = models.CharField(
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max_length=128, blank=True, null=True, verbose_name=_("Payment")
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)
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category = models.ForeignKey(
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Category,
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on_delete=models.SET_NULL,
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blank=True,
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null=True,
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verbose_name=_("Category"),
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)
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def __str__(self):
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return f"{self.date} – {self.name}"
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@property
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def invoices(self):
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return Invoice.objects.filter(transaction=self)
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@property
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def has_invoice(self):
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return self.invoices.count() > 0
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class Meta:
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ordering = ["-date"]
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verbose_name = _("Transaction")
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verbose_name_plural = _("Transactions")
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class TransactionForm(ModelForm):
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template_name = "main/form.html"
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class Meta:
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model = Transaction
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fields = [
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"date",
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"name",
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"value",
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"trader",
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"category",
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"real_date",
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"payment",
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"description",
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]
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def invoice_path(instance, filename):
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return pathlib.Path("invoices", str(instance.id)).with_suffix(".pdf")
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class Invoice(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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name = models.CharField(
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max_length=256, default=_("Invoice"), verbose_name=_("Name")
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)
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file = models.FileField(
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upload_to=invoice_path,
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validators=[FileExtensionValidator(["pdf"])],
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verbose_name=_("File"),
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max_length=128,
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)
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transaction = models.ForeignKey(Transaction, on_delete=models.CASCADE)
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def __str__(self):
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return f"{self.name}: {self.transaction}"
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def delete(self, *args, **kwargs):
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self.file.delete()
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super().delete(*args, **kwargs)
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class Meta:
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verbose_name = _("Invoice")
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verbose_name_plural = _("Invoices")
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class InvoiceForm(ModelForm):
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template_name = "main/form.html"
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prefix = "invoice"
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class Meta:
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model = Invoice
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fields = ["name", "file"]
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def snapshot_path(instance, filename):
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return pathlib.Path("snapshots", str(instance.id)).with_suffix(".pdf")
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class Snapshot(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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date = models.DateField(default=date.today, unique=True, verbose_name=_("Date"))
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value = models.DecimalField(
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max_digits=12, decimal_places=2, default=0, verbose_name=_("Value")
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)
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previous = models.OneToOneField(
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"self", on_delete=models.SET_NULL, blank=True, null=True, editable=False
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)
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diff = models.DecimalField(
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max_digits=12, decimal_places=2, editable=False, blank=True, null=True
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)
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file = models.FileField(
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upload_to=snapshot_path,
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validators=[FileExtensionValidator(["pdf"])],
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verbose_name=_("File"),
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max_length=256,
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blank=True,
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)
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def __str__(self):
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return f"{_('Snapshot')} {self.date}"
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def save(self, *args, only_super=False, **kwargs):
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if not only_super:
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_prever = Snapshot.objects.get(id=self.id)
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if _prever.file and _prever.file != self.file:
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pathlib.Path(_prever.file.path).unlink(missing_ok=True)
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_prev = (
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self.__class__.objects.order_by("-date")
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.exclude(id=self.id)
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.filter(date__lt=self.date)
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.first()
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)
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try:
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_next = self.__class__.objects.exclude(id=self.id).get(previous=_prev)
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except self.__class__.DoesNotExist:
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pass
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else:
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try:
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_prevnext = self.__class__.objects.exclude(id=self.id).get(
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previous=self
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)
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except self.__class__.DoesNotExist:
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pass
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else:
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_prevnext.previous = (
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self.__class__.objects.order_by("-date")
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.exclude(id=self.id)
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.filter(date__lt=_prevnext.date)
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.first()
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)
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_prevnext.save(only_super=True)
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_next.previous = None
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super().save(*args, **kwargs)
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_next.previous = self
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_next.save(only_super=True)
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self.previous = _prev
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if self.previous is None:
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self.diff = None
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else:
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self.diff = self.value - self.previous.value
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super().save(*args, **kwargs)
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try:
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_next = self.__class__.objects.get(previous=self)
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except self.__class__.DoesNotExist:
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pass
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else:
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_next.save(only_super=True)
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def delete(self, *args, only_super=False, **kwargs):
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self.file.delete()
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if not only_super:
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try:
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_next = self.__class__.objects.get(previous=self)
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except self.__class__.DoesNotExist:
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super().delete(*args, **kwargs)
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else:
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_next.previous = self.previous
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super().delete(*args, **kwargs)
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_next.save(only_super=True)
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else:
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super().delete(*args, **kwargs)
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@property
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def sum(self):
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if self.previous is None:
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return 0
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trans = self.transactions.aggregate(sum=models.Sum("value"))
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return trans["sum"] or 0
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@property
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def transactions(self):
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if self.previous is None:
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return Transaction.objects.none()
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return Transaction.objects.filter(
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date__lte=self.date, date__gt=self.previous.date
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)
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@property
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def pos(self):
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return (
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self.transactions.filter(value__gt=0).aggregate(sum=models.Sum("value"))[
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"sum"
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]
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or 0
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)
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@property
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def neg(self):
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return (
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self.transactions.filter(value__lt=0).aggregate(sum=models.Sum("value"))[
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"sum"
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]
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or 0
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)
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class Meta:
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ordering = ["-date"]
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verbose_name = _("Snapshot")
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verbose_name_plural = _("Snapshots")
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class SnapshotForm(ModelForm):
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template_name = "main/form.html"
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class Meta:
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model = Snapshot
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fields = ["date", "value", "file"]
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