feat(chat): add models, views, WebSocket consumers, forms and URL config

chat/models.py

@@ -0,0 +1,66 @@
+from django.db import models
+from django.contrib.auth.models import User
+
+
+class UserProfile(models.Model):
+    ROLE_CHOICES = [
+        ('admin', 'Administrator'),
+        ('moderator', 'Moderator'),
+        ('user', 'User'),
+    ]
+
+    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='profile')
+    avatar = models.ImageField(upload_to='avatars/', null=True, blank=True)
+    bio = models.TextField(blank=True, default='')
+    role = models.CharField(max_length=20, choices=ROLE_CHOICES, default='user')
+    blocked_users = models.ManyToManyField(User, related_name='blocked_by', blank=True)
+    online = models.BooleanField(default=False)
+
+    def __str__(self):
+        return f'{self.user.username} ({self.role})'
+
+    def is_admin(self):
+        return self.role == 'admin'
+
+    def is_moderator(self):
+        return self.role in ('admin', 'moderator')
+
+
+class Channel(models.Model):
+    name = models.CharField(max_length=100, unique=True)
+    description = models.TextField(blank=True, default='')
+    created_by = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, related_name='created_channels')
+    members = models.ManyToManyField(User, related_name='channels', blank=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return f'#{self.name}'
+
+
+class Message(models.Model):
+    channel = models.ForeignKey(Channel, on_delete=models.CASCADE, related_name='messages')
+    sender = models.ForeignKey(User, on_delete=models.CASCADE, related_name='messages')
+    content = models.TextField(blank=True, default='')
+    file = models.FileField(upload_to='uploads/', null=True, blank=True)
+    timestamp = models.DateTimeField(auto_now_add=True)
+    deleted = models.BooleanField(default=False)
+
+    class Meta:
+        ordering = ['timestamp']
+
+    def __str__(self):
+        return f'{self.sender.username}: {self.content[:50]}'
+
+
+class DirectMessage(models.Model):
+    sender = models.ForeignKey(User, on_delete=models.CASCADE, related_name='sent_dms')
+    receiver = models.ForeignKey(User, on_delete=models.CASCADE, related_name='received_dms')
+    content = models.TextField(blank=True, default='')
+    file = models.FileField(upload_to='dm_uploads/', null=True, blank=True)
+    timestamp = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        ordering = ['timestamp']
+
+    def __str__(self):
+        return f'DM {self.sender.username} → {self.receiver.username}'