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ramvignesh-b
59 lines
2.3 KiB
Python
59 lines
2.3 KiB
Python
import uuid
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from django.conf import settings
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from django.core.exceptions import ValidationError
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from django.db import models
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class Letter(models.Model):
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class Type(models.TextChoices):
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KEPT = "KEPT", "Kept"
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SENT = "SENT", "Sent"
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VAULT = "VAULT", "Vault"
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class Status(models.TextChoices):
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DRAFT = "DRAFT", "Draft"
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SEALED = "SEALED", "Sealed"
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BURNED = "BURNED", "Burned"
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public_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=True)
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user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="letters")
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type = models.CharField(max_length=10, choices=Type.choices, default=Type.KEPT)
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status = models.CharField(max_length=10, choices=Status.choices, default=Status.DRAFT)
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created_at = models.DateTimeField(auto_now_add=True)
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updated_at = models.DateTimeField(auto_now=True)
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encrypted_content = models.TextField(null=True, blank=True)
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encrypted_metadata = models.TextField(null=True, blank=True)
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unlock_at = models.DateTimeField(null=True, blank=True, db_index=True)
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sealed_at = models.DateTimeField(null=True, blank=True)
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opened_at = models.DateTimeField(null=True, blank=True)
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burned_at = models.DateTimeField(null=True, blank=True)
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notified_at = models.DateTimeField(null=True, blank=True, db_index=True)
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encrypted_dek = models.TextField(null=True, blank=True)
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def clean(self):
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"""
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Performs custom validation logic for Letter status and type relations.
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"""
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super().clean()
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if self.type == Letter.Type.VAULT and self.status == Letter.Status.SEALED and not self.unlock_at:
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raise ValidationError("A sealed VAULT letter must have an unlock_date.")
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def __str__(self):
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return f"{self.type} - {self.status}"
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class LetterImage(models.Model):
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"""
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Creates one to many relationship between Letter and Image.
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Stores the uploaded images to server directory after inserting into the DB.
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"""
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public_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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letter = models.ForeignKey(Letter, on_delete=models.CASCADE, related_name="images")
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file_name = models.CharField(max_length=255)
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file = models.FileField(upload_to="encrypted-images/")
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def __str__(self):
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return f"Image {self.public_id} for {self.letter}"
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