Refactor: file api in to seperate api app & use drf api views

backend/api/files/views.py

@@ -0,0 +1,108 @@
+import os
+from django.conf import settings
+from django.http import FileResponse
+from rest_framework import status
+from rest_framework.views import APIView
+from rest_framework.response import Response
+from rest_framework.permissions import IsAuthenticated
+from sorl.thumbnail import get_thumbnail
+from apps.files.models import PostFileModel
+from .serializers import PostFileSerializer  # You'll need to create this
+
+THUMBNAIL_SIZES = {
+    "sx": (64, ".thumb_64.jpg"),
+    "sm": (256, ".thumb_256.jpg"),
+    "md": (748, ".thumb_748.jpg"),
+    "lg": (1024, ".thumb_1024.jpg"),
+    "xl": (2048, ".thumb_2048.jpg"),
+}
+
+
+class FileServeView(APIView):
+    """
+    API view to serve content files for download or inline viewing.
+    """
+
+    # Uncomment the following line if authentication is required
+    # permission_classes = [IsAuthenticated]
+
+    def get_thumbnail_file(self, source_path, size_key):
+        """Generates and retrieves the thumbnail file."""
+        size, suffix = THUMBNAIL_SIZES.get(size_key, (None, ""))
+        if size:
+            thumbnail_file = get_thumbnail(source_path, str(size), upscale=False)
+            return os.path.abspath(
+                os.path.join(settings.MEDIA_ROOT, thumbnail_file.name)
+            ), suffix
+        return None, ""
+
+    def get(self, request, file_hash):
+        """Handle GET requests for file serving."""
+        download = request.query_params.get("d") == "0"
+        thumbnail_key = request.query_params.get("t")
+
+        try:
+            obj_file = PostFileModel.objects.filter(hash_blake3=file_hash).first()
+            if not obj_file:
+                return Response(
+                    {"error": "File not found"}, status=status.HTTP_404_NOT_FOUND
+                )
+
+            file_name = obj_file.name.first().filename
+            file_type = obj_file.file_type
+            source_file = obj_file.file
+
+            # Use thumbnail if requested and file type is image
+            if thumbnail_key and file_type != "image":
+                source_file = obj_file.thumbnail
+
+            # Retrieve the requested thumbnail file if applicable
+            if thumbnail_key in THUMBNAIL_SIZES:
+                thumbnail_path, suffix = self.get_thumbnail_file(
+                    source_file.path, thumbnail_key
+                )
+                if thumbnail_path:
+                    file_name += suffix
+                    file = open(thumbnail_path, "rb")
+                else:
+                    file = source_file.file
+            else:
+                file = source_file.file
+
+            response = FileResponse(file)
+            disposition_type = "attachment" if download else "inline"
+            response["Content-Disposition"] = (
+                f'{disposition_type}; filename="{file_name}"'
+            )
+            return response
+
+        except Exception as e:
+            return Response(
+                {"error": str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR
+            )
+
+
+class FileDetailView(APIView):
+    """
+    API view to get file metadata without serving the actual file.
+    """
+
+    # Uncomment the following line if authentication is required
+    # permission_classes = [IsAuthenticated]
+
+    def get(self, request, file_hash):
+        """Return file metadata."""
+        try:
+            obj_file = PostFileModel.objects.filter(hash_blake3=file_hash).first()
+            if not obj_file:
+                return Response(
+                    {"error": "File not found"}, status=status.HTTP_404_NOT_FOUND
+                )
+
+            serializer = PostFileSerializer(obj_file)
+            return Response(serializer.data)
+
+        except Exception as e:
+            return Response(
+                {"error": str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR
+            )