update backend: now supporting getLastChargesList

store/backend.py

@@ -194,3 +194,20 @@ class PurchaseLogic:
             user.updateMoney(purchase.price)
             print("user_id:", user.id, "purchase_id:", purchase.id, "user.money:", user.money)
 
+
+class ChargeLogic:
+    
+    """
+    Returns a list of the last charges of a specified user: [{'id': ..., 'amount': ...}, Decimal(...,...)]
+    @param user_id: the id of the specified user
+    @config-param max_charges: Number of charges to be shown. Depends on N_LAST_CHARGES
+    """
+    def getLastChargesList(user_id):
+        max_charges = config['N_LAST_CHARGES'] 
+        charges = Charge.objects.filter(user=user_id).values('id', 'amount')
+        if max_charges < 0:
+            charges = list(charges.order_by('time_stamp').reverse())
+        else:
+            charges = list(charges.order_by('time_stamp').reverse())[:max_charges]
+        return charges
+

store/store_config.py

@@ -5,8 +5,10 @@ T_ANNULLABLE_PURCHASE_M: time of minutes a user has for a purchase to undo it
 N_MOST_BOUGHT_PRODUCTS: number of products to be shown in 'Häufig gekauft'
 T_MOST_BOUGHT_PRODUCTS_D: number of days in the past that are used as time intervall limit to search for 'Häufig gekauft'
 N_USERS_LOGIN: number of users that should be shown in the users list in the login-screen. A negative number means
-     'all users are selected'
+    'all users are selected'
 T_USERS_LOGIN_D: number of days in the past that are used as time intervall limit to search for users
+N_LAST_CHARGES: number of charges that should be shown in 'Letzte Aufladungen'. A negative number means 'all users are
+    selected'
 """
 KAFFEEKASSE = {'N_LAST_BOUGHT_PRODUCTS': 5,
                'T_LAST_BOUGHT_PRODUCTS_D': 30,
@@ -15,4 +17,5 @@ KAFFEEKASSE = {'N_LAST_BOUGHT_PRODUCTS': 5,
                'T_MOST_BOUGHT_PRODUCTS_D': 30,
                'N_USERS_LOGIN': -1,
                'T_USERS_LOGIN_D': 356,
+               'N_LAST_CHARGES': -1,
                }