Untitled

from django.db import models

# Create your models here.
class User(models.Model):
    name = models.CharField(max_length=100)
    email = models.EmailField()
    password = models.TextField()

class BloodDonor(models.Model):
    BLOOD_GROUP_CHOICES = [
        ('A+', 'A+'),
        ('A-', 'A-'),
        ('B+', 'B+'),
        ('B-', 'B-'),
        ('AB+', 'AB+'),
        ('AB-', 'AB-'),
        ('O+', 'O+'),
        ('O-', 'O-'),
    ]
    name = models.CharField(max_length=100)
    age = models.IntegerField()
    gender = models.CharField(max_length=10)
    blood_group = models.CharField(max_length=3, choices=BLOOD_GROUP_CHOICES)
    contact_number = models.CharField(max_length=15)
    email = models.EmailField(unique=True)
    address = models.TextField()
    last_donation_date = models.DateField()

class BloodRecipient(models.Model):
    BLOOD_GROUP_CHOICES = [
        ('A+', 'A+'),
        ('A-', 'A-'),
        ('B+', 'B+'),
        ('B-', 'B-'),
        ('AB+', 'AB+'),
        ('AB-', 'AB-'),
        ('O+', 'O+'),
        ('O-', 'O-'),
    ]
    name = models.CharField(max_length=100)
    age = models.IntegerField()
    gender = models.CharField(max_length=10)
    blood_group = models.CharField(max_length=3, choices=BLOOD_GROUP_CHOICES)
    contact_number = models.CharField(max_length=15)
    email = models.EmailField(unique=True)
    address = models.TextField()
    required_blood_group = models.CharField(max_length=3, choices=BLOOD_GROUP_CHOICES)
    request_date = models.DateField()

class BloodInventory(models.Model):
    BLOOD_GROUP_CHOICES = [
        ('A+', 'A+'),
        ('A-', 'A-'),
        ('B+', 'B+'),
        ('B-', 'B-'),
        ('AB+', 'AB+'),
        ('AB-', 'AB-'),
        ('O+', 'O+'),
        ('O-', 'O-'),
    ]
    blood_group = models.CharField(max_length=3, choices=BLOOD_GROUP_CHOICES)
    units_available = models.PositiveIntegerField()
    last_updated = models.DateTimeField(auto_now=True)

class Donation(models.Model):
    donor = models.ForeignKey(BloodDonor, on_delete=models.CASCADE)
    blood_group = models.CharField(max_length=3, choices=BloodDonor.BLOOD_GROUP_CHOICES)
    units_donated = models.PositiveIntegerField()
    donation_date = models.DateField(auto_now_add=True)

    def __str__(self):
        return f"Donor: {self.donor.name}, Blood Group: {self.blood_group}, Units: {self.units_donated}"


class BloodRequest(models.Model):
    recipient = models.ForeignKey(BloodRecipient, on_delete=models.CASCADE)
    blood_group = models.CharField(max_length=3, choices=BloodRecipient.BLOOD_GROUP_CHOICES)
    units_requested = models.PositiveIntegerField()
    request_date = models.DateField(auto_now_add=True)
    status = models.BooleanField(default=False)

    def __str__(self):
        return f"Recipient: {self.recipient.name}, Blood Group: {self.blood_group}, Units: {self.units_requested}"