init

backend/apps/core/models.py

@@ -0,0 +1,92 @@
+# core/models.py - Core system models for video call application
+from django.db import models
+from django.contrib.auth.hashers import make_password, check_password
+from django.utils import timezone
+
+
+class SystemSettings(models.Model):
+    """
+    Model for storing system-wide settings like access password.
+    Follows singleton pattern - only one instance should exist.
+    """
+    access_password_hash = models.CharField(
+        max_length=255,
+        help_text="Hashed password for system access"
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+    is_active = models.BooleanField(default=True)
+
+    class Meta:
+        verbose_name = "System Settings"
+        verbose_name_plural = "System Settings"
+
+    def set_password(self, raw_password):
+        """Set and hash the access password"""
+        self.access_password_hash = make_password(raw_password)
+
+    def check_password(self, raw_password):
+        """Check if provided password matches stored hash"""
+        return check_password(raw_password, self.access_password_hash)
+
+    @classmethod
+    def get_settings(cls):
+        """Get or create system settings instance"""
+        settings, created = cls.objects.get_or_create(
+            pk=1,
+            defaults={
+                'access_password_hash': make_password('admin123'),
+                'is_active': True
+            }
+        )
+        return settings
+
+    def save(self, *args, **kwargs):
+        """Ensure only one settings instance exists"""
+        self.pk = 1
+        super().save(*args, **kwargs)
+
+    def delete(self, *args, **kwargs):
+        """Prevent deletion of system settings"""
+        pass
+
+    def __str__(self):
+        return f"System Settings (Updated: {self.updated_at.strftime('%Y-%m-%d %H:%M')})"
+
+
+class RoomActivityLog(models.Model):
+    """
+    Model for logging room activities without storing personal data.
+    Used for analytics and system monitoring.
+    """
+    ACTION_CHOICES = [
+        ('created', 'Room Created'),
+        ('joined', 'User Joined'),
+        ('left', 'User Left'),
+        ('expired', 'Room Expired'),
+        ('deleted', 'Room Deleted'),
+    ]
+
+    room_id = models.CharField(max_length=36, db_index=True)  # UUID
+    action = models.CharField(max_length=20, choices=ACTION_CHOICES)
+    timestamp = models.DateTimeField(auto_now_add=True)
+    participant_count = models.PositiveIntegerField(default=0)
+    ip_address = models.GenericIPAddressField(null=True, blank=True)
+    user_agent_hash = models.CharField(
+        max_length=64,
+        null=True,
+        blank=True,
+        help_text="Hashed user agent for basic analytics"
+    )
+
+    class Meta:
+        ordering = ['-timestamp']
+        indexes = [
+            models.Index(fields=['room_id', '-timestamp']),
+            models.Index(fields=['action', '-timestamp']),
+        ]
+        verbose_name = "Room Activity Log"
+        verbose_name_plural = "Room Activity Logs"
+
+    def __str__(self):
+        return f"{self.get_action_display()} - {self.room_id[:8]}... at {self.timestamp.strftime('%Y-%m-%d %H:%M:%S')}"