MEJORA: Refactorizacion a HTMX para WebSockets en tiempo real y agregado widget-tweaks

expenses/signals.py

@@ -2,40 +2,42 @@ from django.db.models.signals import post_save, post_delete
 from django.dispatch import receiver
 from channels.layers import get_channel_layer
 from asgiref.sync import async_to_sync
+from django.template.loader import render_to_string
 from .models import Expense
 
 @receiver(post_save, sender=Expense)
 def expense_saved(sender, instance, created, **kwargs):
     channel_layer = get_channel_layer()
-    action = 'created' if created else 'updated'
     
-    expense_data = {
-        'id': instance.id,
-        'amount': str(instance.amount_clp),
-        'category': instance.category.name if instance.category else None,
-        'project': instance.project.name if instance.project else None,
-        'user': instance.user.username if instance.user else None,
-        'date': instance.date.strftime('%Y-%m-%d'),
-        'description': instance.description,
-    }
+    # Renderizamos la fila parcial
+    html = render_to_string('expenses/partials/expense_row.html', {'expense': instance})
+    
+    # Envolvemos el HTML con las directivas OOB (Out-of-Band) de HTMX
+    if created:
+        # Si es nuevo, lo insertamos al principio del tbody con id "expenses-tbody"
+        payload = f'<tbody id="expenses-tbody" hx-swap-oob="afterbegin">{html}</tbody>'
+    else:
+        # Si ya existe, HTMX reemplazará automáticamente el tr con el mismo ID si usamos hx-swap-oob="true"
+        payload = html.replace('<tr ', '<tr hx-swap-oob="true" ')
 
     async_to_sync(channel_layer.group_send)(
         'expenses_updates',
         {
             'type': 'expense_update',
-            'action': action,
-            'expense': expense_data
+            'html': payload
         }
     )
 
 @receiver(post_delete, sender=Expense)
 def expense_deleted(sender, instance, **kwargs):
     channel_layer = get_channel_layer()
+    # Para borrar, mandamos un elemento vacío con swap out-of-band que reemplace la fila eliminada
+    payload = f'<tr id="expense-{instance.id}" hx-swap-oob="outerHTML"></tr>'
+    
     async_to_sync(channel_layer.group_send)(
         'expenses_updates',
         {
             'type': 'expense_update',
-            'action': 'deleted',
-            'expense': {'id': instance.id}
+            'html': payload
         }
     )