Completed Task-1 and Task-2

backend/backend/__init__.py

@@ -0,0 +1,2 @@
+from .celery import app as celery_app
+__all__ = ('celery_app',)

backend/backend/celery.py

@@ -0,0 +1,8 @@
+import os
+from celery import Celery
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'backend.settings')
+
+app = Celery('backend')
+app.config_from_object('django.conf:settings', namespace='CELERY')
+app.autodiscover_tasks()

backend/backend/settings.py

@@ -12,7 +12,6 @@
 
 import os
 from pathlib import Path
-
 from dotenv import load_dotenv
 
 load_dotenv()
@@ -47,8 +46,23 @@
     "authentication",
     "chat",
     "gpt",
+    "django_crontab",
+    "django_celery_beat",
+]
+
+# Crontab Configuration
+CRONJOBS = [
+    ('0 0 * * *', 'django.core.management.call_command', ['cleanup_conversations']),
 ]
 
+INSTALLED_APPS += ['rest_framework.authtoken']
+
+REST_FRAMEWORK = {
+    'DEFAULT_AUTHENTICATION_CLASSES': [
+        'rest_framework.authentication.TokenAuthentication',
+    ],
+}
+
 MIDDLEWARE = [
     "django.middleware.security.SecurityMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",
@@ -84,10 +98,15 @@
 # Database
 # https://docs.djangoproject.com/en/4.2/ref/settings/#databases
 
+
 DATABASES = {
-    "default": {
-        "ENGINE": "django.db.backends.sqlite3",
-        "NAME": BASE_DIR / "db.sqlite3",
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': 'Demo',
+        'USER': 'postgres',
+        'PASSWORD': 'Pakeer@124',
+        'HOST': 'localhost',
+        'PORT': '5432',
     }
 }
 
@@ -131,6 +150,7 @@
 
 STATIC_ROOT = BASE_DIR / "static"
 STATIC_URL = "/static/"
+OPENAI_API_KEY = os.environ.get('OPENAI_API_KEY', '')
 
 # Default primary key field type
 # https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field
@@ -149,3 +169,14 @@
 SESSION_COOKIE_SECURE = True
 CSRF_COOKIE_SECURE = True
 CSRF_COOKIE_SAMESITE = "None"
+# Media files configuration
+MEDIA_URL = '/media/'
+MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
+
+# File upload settings
+FILE_UPLOAD_MAX_MEMORY_SIZE = 10485760  # 10MB
+DATA_UPLOAD_MAX_MEMORY_SIZE = 10485760  # 10MB
+
+CELERY_BROKER_URL = 'redis://localhost:6379/0'
+CELERY_ACCEPT_CONTENT = ['json']
+CELERY_TASK_SERIALIZER = 'json'

backend/chat/admin.py

@@ -2,8 +2,8 @@
 from django.utils import timezone
 from nested_admin.nested import NestedModelAdmin, NestedStackedInline, NestedTabularInline
 
-from chat.models import Conversation, Message, Role, Version
-
+from chat.models import Conversation, Message, Role, Version,UploadedFile
+from django.utils.html import format_html
 
 class RoleAdmin(NestedModelAdmin):
     list_display = ["id", "name"]
@@ -51,9 +51,20 @@ def queryset(self, request, queryset):
 class ConversationAdmin(NestedModelAdmin):
     actions = ["undelete_selected", "soft_delete_selected"]
     inlines = [VersionInline]
-    list_display = ("title", "id", "created_at", "modified_at", "deleted_at", "version_count", "is_deleted", "user")
+    list_display = ("title", "id", "created_at", "modified_at","short_summary",  "deleted_at", "version_count", "is_deleted", "user")
     list_filter = (DeletedListFilter,)
     ordering = ("-modified_at",)
+    readonly_fields = ("summary",)  
+    fields = (
+        "title",
+        "summary",  
+        "user",
+        "deleted_at",
+    )
+    def short_summary(self, obj):
+        return (obj.summary[:50] + "...") if obj.summary else "— No summary generated "
+    short_summary.short_description = "Summary"
+
 
     def undelete_selected(self, request, queryset):
         queryset.update(deleted_at=None)
@@ -86,7 +97,50 @@ class VersionAdmin(NestedModelAdmin):
     list_display = ("id", "conversation", "parent_version", "root_message")
 
 
+
+# NEW: UploadedFile Admin
+class UploadedFileAdmin(admin.ModelAdmin):
+    list_display = ('original_filename', 'user', 'file_size_display', 'file_type', 'uploaded_at', 'file_link')
+    list_filter = ('file_type', 'uploaded_at')
+    search_fields = ('original_filename', 'user__username', 'user__email', 'file_hash')
+    readonly_fields = ('id', 'file_hash', 'file_size', 'file_type', 'uploaded_at', 'file_preview')
+
+    fieldsets = (
+        ('File Information', {
+            'fields': ('id', 'file', 'file_preview', 'original_filename', 'file_type')
+        }),
+        ('Metadata', {
+            'fields': ('file_size', 'file_hash', 'uploaded_at', 'user')
+        }),
+    )
+
+    @admin.display(description="File Size")
+    def file_size_display(self, obj):
+        """Display file size in human-readable format"""
+        size = obj.file_size
+        for unit in ['B', 'KB', 'MB', 'GB']:
+            if size < 1024.0:
+                return f"{size:.2f} {unit}"
+            size /= 1024.0
+        return f"{size:.2f} TB"
+
+    @admin.display(description="File Link")
+    def file_link(self, obj):
+        """Display download link for file"""
+        if obj.file:
+            return format_html('<a href="{}" target="_blank">Download</a>', obj.file.url)
+        return "No file"
+
+    @admin.display(description="Preview")
+    def file_preview(self, obj):
+        """Display image preview if file is an image"""
+        if obj.file and obj.file_type.startswith('image/'):
+            return format_html('<img src="{}" style="max-width: 200px; max-height: 200px;" />', obj.file.url)
+        return "No preview available"
+
+
 admin.site.register(Role, RoleAdmin)
 admin.site.register(Message, MessageAdmin)
 admin.site.register(Conversation, ConversationAdmin)
 admin.site.register(Version, VersionAdmin)
+admin.site.register(UploadedFile, UploadedFileAdmin)

backend/chat/management/commands/cleanup_conversations.py

@@ -0,0 +1,23 @@
+from django.core.management.base import BaseCommand
+from django.utils import timezone
+from datetime import timedelta
+
+from chat.models import Conversation
+
+class Command(BaseCommand):
+    help = "Delete conversations older than 30 days"
+
+    def handle(self, *args, **kwargs):
+        cutoff_date = timezone.now() - timedelta(days=30)
+        old_conversations = Conversation.objects.filter(
+            created_at__lt=cutoff_date
+        )
+
+        count = old_conversations.count()
+        old_conversations.delete()
+
+        self.stdout.write(
+            self.style.SUCCESS(
+                f"Deleted {count} old conversations"
+            )
+        )

backend/chat/migrations/0002_conversation_summary.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-01-30 16:04
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chat', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='conversation',
+            name='summary',
+            field=models.TextField(blank=True, help_text='Auto-generated conversation summary', null=True),
+        ),
+    ]

backend/chat/migrations/0003_alter_conversation_summary.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-01-30 18:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chat', '0002_conversation_summary'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='conversation',
+            name='summary',
+            field=models.TextField(blank=True, null=True),
+        ),
+    ]

backend/chat/migrations/0004_uploadedfile.py

@@ -0,0 +1,34 @@
+# Generated by Django 6.0.1 on 2026-01-30 20:02
+
+import django.db.models.deletion
+import uuid
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chat', '0003_alter_conversation_summary'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='UploadedFile',
+            fields=[
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('file', models.FileField(upload_to='uploads/%Y/%m/%d/')),
+                ('original_filename', models.CharField(max_length=255)),
+                ('file_size', models.BigIntegerField(help_text='File size in bytes')),
+                ('file_type', models.CharField(max_length=100)),
+                ('file_hash', models.CharField(help_text='SHA-256 hash for duplicate detection', max_length=64, unique=True)),
+                ('uploaded_at', models.DateTimeField(auto_now_add=True)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='uploaded_files', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'ordering': ['-uploaded_at'],
+                'indexes': [models.Index(fields=['file_hash'], name='chat_upload_file_ha_43c6d5_idx'), models.Index(fields=['user', '-uploaded_at'], name='chat_upload_user_id_618957_idx')],
+            },
+        ),
+    ]