feat: added error when invalid topup amount is entered

admin_board_view/forms.py

@@ -2,4 +2,6 @@
 
 
 class TopUpForm(forms.Form):
-    amount = forms.DecimalField(min_value=0, decimal_places=2, required=True)
+    amount = forms.DecimalField(
+        min_value=0, decimal_places=2, required=True, max_value=1000
+    )

admin_board_view/templates/user_home.html

@@ -2,6 +2,8 @@
 {% load static %}
 {% block body %}
 <main class="container mt-3">
+
+  <!-- Transaction status -->
   {% if transaction %}
     {% if transaction.status == PaymentStatus.PAID %}
       <div class="alert alert-success">
@@ -17,6 +19,16 @@
       </div>
     {% endif %}
   {% endif %}
+
+  <!-- Validation errors -->
+  {% if error %}
+    <div class="alert alert-danger">
+      {% if error == "1" %}
+        You entered an invalid number to the top up form, try entering an amount greater than €0 and less than €1000 with at most two decimals.
+      {% endif %}
+    </div>
+  {% endif %}
+
   <h1>Welcome {{ user_info.name }}</h1>
   <h5 class="mb-2">
     Current balance: <b>{{ user_info.euro_balance }}</b>
@@ -85,7 +97,7 @@ <h5>Top up balance</h5>
                 <label for="amount" class="sr-only">Amount: </label>
               </div>
               <div class="form-group col">
-                <input placeholder="Amount" class="form-control" type="number" min="0" step="0.01" name="amount" />
+                <input placeholder="Amount" class="form-control" type="number" min="0" step="0.01" name="amount" required />
               </div>
               <div class="form-group col">
                 <button type="submit" class="btn btn-primary">Top up</button>

admin_board_view/views.py

@@ -83,6 +83,7 @@ def index(request):
                 "transaction": transaction,
                 "PaymentStatus": PaymentStatus,
                 "TRANSACTION_FEE": settings.TRANSACTION_FEE,
+                "error": request.GET.get("error"),
             },
         )
 

mongoose_app/views.py

@@ -368,7 +368,7 @@ def topup(request):
         )
         return redirect(payment.checkout_url)
     else:
-        return HttpResponse(status=400)
+        return redirect("/?error=1")
 
 
 @csrf_exempt