first step

Billing.Shared/Views/BillPage.xaml.cs

@@ -1,8 +1,10 @@
+using Billing.Languages;
 using Billing.Models;
 using Billing.UI;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using Xamarin.Forms;
 
 namespace Billing.Views
@@ -23,11 +25,11 @@ namespace Billing.Views
             set => SetValue(BillsProperty, value);
         }
 
-        public Command AddBilling { get; }
+        public Command EditBilling { get; }
 
         public BillPage()
         {
-            AddBilling = new Command(OnAddBilling);
+            EditBilling = new Command(OnEditBilling);
 
             InitializeComponent();
 
@@ -42,14 +44,28 @@ namespace Billing.Views
                 b.CreateTime.Year == e.Date.Year &&
                 b.CreateTime.Month == e.Date.Month &&
                 b.CreateTime.Day == e.Date.Day);
-            Bills = new List<UIBill>(bills.Select(b => new UIBill(b)
+            Bills = new List<UIBill>(bills.Select(b => WrapBill(b)));
+        }
+
+        private UIBill WrapBill(Bill b)
+        {
+            return new UIBill(b)
             {
                 Icon = App.Categories.FirstOrDefault(c => c.Id == b.CategoryId)?.Icon ?? BaseModel.ICON_DEFAULT,
                 Name = b.Name,
                 DateCreation = b.CreateTime,
                 Amount = b.Amount,
                 Wallet = App.Accounts.FirstOrDefault(a => a.Id == b.WalletId)?.Name
-            }));
+            };
+        }
+
+        private void UpdateBill(UIBill bill)
+        {
+            bill.Icon = App.Categories.FirstOrDefault(c => c.Id == bill.Bill.CategoryId)?.Icon ?? BaseModel.ICON_DEFAULT;
+            bill.Name = bill.Bill.Name;
+            bill.DateCreation = bill.Bill.CreateTime;
+            bill.Amount = bill.Bill.Amount;
+            bill.Wallet = App.Accounts.FirstOrDefault(a => a.Id == bill.Bill.WalletId)?.Name;
         }
 
         private void OnTitleDateLongPressed(object sender, EventArgs e)
@@ -57,7 +73,7 @@ namespace Billing.Views
             billingDate.SetDateTime(DateTime.Now);
         }
 
-        private async void OnAddBilling()
+        private async void OnEditBilling(object o)
         {
             if (Tap.IsBusy)
             {
@@ -65,10 +81,55 @@ namespace Billing.Views
             }
             using (Tap.Start())
             {
-                var page = new AddBillPage(SelectedDate);
+                AddBillPage page;
+                if (o is UIBill bill)
+                {
+                    page = new AddBillPage(bill.Bill);
+                }
+                else
+                {
+                    if (App.Accounts.Count == 0)
+                    {
+                        await this.ShowMessage(Resource.NeedAccount);
+                        await Shell.Current.GoToAsync("//Accounts");
+                        return;
+                    }
+                    page = new AddBillPage(SelectedDate);
+                }
+                page.BillChecked += OnBillChecked;
                 await Navigation.PushAsync(page);
             }
         }
+
+        private void OnBillChecked(object sender, Bill e)
+        {
+            if (e.Id < 0)
+            {
+                int maxId;
+                if (App.Bills.Count > 0)
+                {
+                    maxId = App.Bills.Max(b => b.Id);
+                }
+                else
+                {
+                    maxId = -1;
+                }
+                e.Id = maxId + 1;
+                App.Bills.Add(e);
+                Bills.Add(WrapBill(e));
+                billsLayout.Refresh(Bills);
+            }
+            else
+            {
+                var bill = Bills.FirstOrDefault(b => b.Bill == e);
+                if (bill != null)
+                {
+                    UpdateBill(bill);
+                }
+            }
+
+            Task.Run(App.WriteBills);
+        }
     }
 
     public class UIBill : BindableObject