[WEB-664] refactor: folder structure (#3884)

* refactor: folder structure

* chore: resolved merge conflicts

apiserver/plane/app/views/issue/attachment.py

@@ -0,0 +1,73 @@
+# Python imports
+import json
+
+# Django imports
+from django.utils import timezone
+from django.core.serializers.json import DjangoJSONEncoder
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+from rest_framework.parsers import MultiPartParser, FormParser
+
+# Module imports
+from .. import BaseAPIView
+from plane.app.serializers import IssueAttachmentSerializer
+from plane.app.permissions import ProjectEntityPermission
+from plane.db.models import IssueAttachment
+from plane.bgtasks.issue_activites_task import issue_activity
+
+
+class IssueAttachmentEndpoint(BaseAPIView):
+    serializer_class = IssueAttachmentSerializer
+    permission_classes = [
+        ProjectEntityPermission,
+    ]
+    model = IssueAttachment
+    parser_classes = (MultiPartParser, FormParser)
+
+    def post(self, request, slug, project_id, issue_id):
+        serializer = IssueAttachmentSerializer(data=request.data)
+        if serializer.is_valid():
+            serializer.save(project_id=project_id, issue_id=issue_id)
+            issue_activity.delay(
+                type="attachment.activity.created",
+                requested_data=None,
+                actor_id=str(self.request.user.id),
+                issue_id=str(self.kwargs.get("issue_id", None)),
+                project_id=str(self.kwargs.get("project_id", None)),
+                current_instance=json.dumps(
+                    serializer.data,
+                    cls=DjangoJSONEncoder,
+                ),
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=request.META.get("HTTP_ORIGIN"),
+            )
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    def delete(self, request, slug, project_id, issue_id, pk):
+        issue_attachment = IssueAttachment.objects.get(pk=pk)
+        issue_attachment.asset.delete(save=False)
+        issue_attachment.delete()
+        issue_activity.delay(
+            type="attachment.activity.deleted",
+            requested_data=None,
+            actor_id=str(self.request.user.id),
+            issue_id=str(self.kwargs.get("issue_id", None)),
+            project_id=str(self.kwargs.get("project_id", None)),
+            current_instance=None,
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=request.META.get("HTTP_ORIGIN"),
+        )
+
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+    def get(self, request, slug, project_id, issue_id):
+        issue_attachments = IssueAttachment.objects.filter(
+            issue_id=issue_id, workspace__slug=slug, project_id=project_id
+        )
+        serializer = IssueAttachmentSerializer(issue_attachments, many=True)
+        return Response(serializer.data, status=status.HTTP_200_OK)