add contract models and register this models admin panel

core/apps/contracts/models/__init__.py

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+from .contract import *

core/apps/contracts/models/contract.py

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+from django.db import models
+from django.contrib.auth import get_user_model
+from django.contrib.postgres.fields import ArrayField
+
+from core.apps.shared.models.base import BaseModel
+from core.apps.contracts.enums.contract import SIDES, STATUS
+from core.apps.contracts.enums.contract_side import ROLE
+from core.apps.contracts.enums.contract_file import FILE_TYPE, USER_PERMISSION
+from core.apps.contracts.enums.contract_signature import SIGNATURE_TYPE, SIGNATURE_STATUS
+from core.apps.contracts.enums.contract_notification import NOTIFICATION_EVENT, TYPE_MESSAGE, TYPE_NOTIFICATION
+from core.apps.accounts.validators.user import phone_regex
+
+
+class Contract(BaseModel):
+    file = models.FileField(upload_to="contract/files/%Y/%m/")
+    contract_number = models.PositiveIntegerField()
+    name = models.CharField(max_length=200)
+    
+    sides = models.CharField(max_length=13, choices=SIDES) # choices
+    status = models.CharField(max_length=15, choices=STATUS) # choices
+ 
+    face_id = models.BooleanField(default=False)
+    attach_file = models.BooleanField(default=False)
+    add_folder = models.BooleanField(default=False)
+    add_notification = models.BooleanField(default=False)
+
+    user = models.ForeignKey(get_user_model(), on_delete=models.CASCADE, related_name='contracts')
+
+    def __str__(self):
+        return f'{self.name} - {self.user}'
+    
+    class Meta:
+        verbose_name = 'contract'
+        verbose_name_plural = 'contracts'
+        db_table = 'contracts'
+
+
+class ContractSide(BaseModel):
+    full_name = models.CharField(max_length=70)
+    indentification = models.CharField(max_length=20)
+    position = models.CharField(max_length=50, null=True, blank=True)
+
+    has_indentification = models.BooleanField(default=False)
+
+    user_role = models.CharField(max_length=9, choices=ROLE)
+    
+    contract = models.ForeignKey(Contract, on_delete=models.CASCADE, related_name='contract_sides')
+    user = models.ForeignKey(get_user_model(), on_delete=models.CASCADE, related_name='contract_sides')
+
+    def __str__(self):
+        return f"{self.full_name} - {self.contract}"
+    
+    class Meta:
+        verbose_name = 'contract side'
+        verbose_name_plural = 'contract sides'
+        db_table = 'contracts_sides'
+
+
+class ContractFile(BaseModel):
+    name = models.CharField(max_length=150)
+    file_type = ArrayField(
+        models.CharField(max_length=10, choices=FILE_TYPE),
+        default=list,
+        blank=True
+    )
+    user_permission = ArrayField(
+        models.CharField(max_length=10, choices=USER_PERMISSION),
+        default=list,
+        blank=True
+    )
+    contract = models.ForeignKey(Contract, on_delete=models.CASCADE, related_name='contract_files')
+
+    def __str__(self):
+        return f'{self.name} - {self.contract}'
+    
+    class Meta:
+        verbose_name = 'contract file'
+        verbose_name_plural = 'contract files'
+        db_table = 'contract_files'
+
+
+class ContractNotification(BaseModel):
+    notification_event = models.CharField(choices=NOTIFICATION_EVENT, max_length=24)
+    type_notification = models.CharField(choices=TYPE_NOTIFICATION, max_length=8) 
+    type_message = models.CharField(null=True, blank=True, choices=TYPE_MESSAGE, max_length=8) 
+
+    message = models.CharField(max_length=160)
+    time = models.TimeField(null=True, blank=True)
+    date = models.DateField(null=True, blank=True)
+    
+    contract = models.ForeignKey(Contract, on_delete=models.CASCADE, related_name="contract_notifications")
+
+    def __str__(self):
+        return f'{self.type_notification} - {self.contract}'
+    
+    class Meta:
+        verbose_name = 'contract notification'
+        verbose_name_plural = 'contract notifications'
+        db_table = 'contract_notifications'
+    
+
+class ContractSignature(BaseModel):
+    contract = models.ForeignKey(Contract, on_delete=models.CASCADE, related_name='contract_signatures')
+    user = models.ForeignKey(get_user_model(), on_delete=models.CASCADE, related_name='contract_users')
+
+    status = models.CharField(max_length=20, choices=SIGNATURE_STATUS) # choices
+    signature_type = models.CharField(max_length=20, choices=SIGNATURE_TYPE) # choices
+
+    is_signature = models.BooleanField(default=False)
+
+    def __str__(self):
+        return f'{self.user} user signature for {self.contract} contract'
+    
+    class Meta:
+        verbose_name = 'contract signature'
+        verbose_name = 'contract signatures'
+        db_table = 'contract_signatures'