feat: pagination

api/book/views.py

 from django.http import JsonResponse
+from django.core.paginator import Paginator
 from django.views.decorators.csrf import csrf_exempt
 
-
 from book.models import Book, Category
 
 
@@ -10,6 +10,7 @@ def bookView(request):
     books = Book.objects.all().order_by("created_at")
     category = request.GET.get("category")
     keyword = request.GET.get("search")
+    page_number = request.GET.get("page", 1)
 
     if request.method == "GET":
         if category:
@@ -18,8 +19,11 @@ def bookView(request):
         if keyword and len(keyword) >= 3:
             books = books.filter(title__icontains=keyword)
 
+        paginator = Paginator(books, 10)
+        page_obj = paginator.get_page(page_number)
+
         data = []
-        for book_item in books:
+        for book_item in page_obj:
             if book_item.category is not None:
                 book = {
                     "id": book_item.id,
@@ -40,7 +44,16 @@ def bookView(request):
                 "cover_image": "http://127.0.0.1:8000" + book_item.cover_image.url,
             }
             data.append(book)
-        return JsonResponse(data, status=200, safe=False)
+
+        response_data = {
+            "data": data,
+            "has_next": page_obj.has_next(),
+            "has_prev": page_obj.has_previous(),
+            "page_number": page_obj.number,
+            "total_pages": paginator.num_pages,
+        }
+
+        return JsonResponse(response_data, status=200, safe=False)
 
     return JsonResponse({"message": "Invalid request method"}, status=405)
 

api/loans/views.py

 import jwt
 from django.utils import timezone
 from django.http import JsonResponse
+from django.core.paginator import Paginator
 from django.views.decorators.csrf import csrf_exempt
 
 from loans.models import BookLoan
@@ -16,6 +17,7 @@ def bookLoanView(request):
         loans = BookLoan.objects.all().order_by("loan_date")
         near_outstanding = request.GET.get("near_outstanding")
         overdue = request.GET.get("overdue")
+        page_number = request.GET.get("page", 1)
 
         try:
             token = header_authorization.split(" ")[1]
@@ -32,8 +34,11 @@ def bookLoanView(request):
                     "loan_date"
                 )
 
+            paginator = Paginator(loans, 10)
+            page_obj = paginator.get_page(page_number)
+
             data = []
-            for loan_item in loans:
+            for loan_item in page_obj:
                 remaining_loan_time = (
                     str(loan_item.due_date.day - now.day) + " days left"
                 )
@@ -61,7 +66,15 @@ def bookLoanView(request):
                 }
                 data.append(loan_obj)
 
-            return JsonResponse(data, safe=False, status=200)
+            response_data = {
+                "data": data,
+                "has_next": page_obj.has_next(),
+                "has_prev": page_obj.has_previous(),
+                "page_number": page_obj.number,
+                "total_pages": paginator.num_pages,
+            }
+
+            return JsonResponse(response_data, safe=False, status=200)
 
         except jwt.exceptions.InvalidTokenError:
             return JsonResponse({"message": "Unauthorized"}, status=401)