Implement proper pagination

docmanager_backend/documents/views.py

@@ -10,6 +10,15 @@ from rest_framework.permissions import IsAuthenticated
 from rest_framework.pagination import PageNumberPagination
 from accounts.permissions import IsStaff, IsHead
 from .models import Document
+from django.db.models import Q
+from operator import or_
+from functools import reduce
+
+
+class DocumentPagination(PageNumberPagination):
+    page_size = 4
+    page_size_query_param = 'page_size'
+    max_page_size = 4
 
 
 class DocumentUpdateView(generics.UpdateAPIView):
@@ -63,6 +72,46 @@ class DocumentStaffListView(generics.ListAPIView):
 
     http_method_names = ["get"]
     serializer_class = DocumentFileSerializer
-    queryset = Document.objects.all()
+    queryset = Document.objects.all().order_by("-date_uploaded")
-    pagination_class = PageNumberPagination
+    pagination_class = DocumentPagination
     permission_classes = [IsAuthenticated, IsStaff]
+
+    def get_queryset(self):
+        # Get the base queryset
+        queryset = super().get_queryset()
+
+        # Check if 'keywords' query parameter is present
+        keyword = self.request.query_params.get('search', None)
+
+        if keyword:
+            queries = []
+            # Create a list to hold individual field conditions for this keyword
+            field_queries = [
+                Q(name__icontains=keyword),
+                Q(document_type__icontains=keyword),
+                Q(sent_from__icontains=keyword),
+                Q(document_month__icontains=keyword),
+                Q(document_year__icontains=keyword),
+                Q(subject__icontains=keyword),
+                Q(ocr_metadata__icontains=keyword)
+            ]
+            # Combine the field conditions with OR
+            combined_query = Q()
+            for q in field_queries:
+                if not combined_query:
+                    combined_query = q
+                else:
+                    combined_query |= q
+            queries.append(combined_query)
+
+            # Now combine all keyword conditions with OR
+            final_query = Q()
+            for q in queries:
+                if not final_query:
+                    final_query = q
+                else:
+                    final_query |= q
+
+            queryset = queryset.filter(final_query)
+
+        return queryset