complete account page

Billing.Shared/UI/Converters.cs

@@ -1,5 +1,7 @@
 using Billing.Languages;
 using Billing.Models;
+using Billing.Themes;
+using Billing.Views;
 using System;
 using System.Collections.Generic;
 using System.Globalization;
@@ -20,18 +22,23 @@ namespace Billing.UI
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            return value;
+            throw new NotImplementedException();
         }
     }
 
     public class MoneyConverter : IValueConverter
     {
         public bool MarkVisible { get; set; } = true;
+        public bool Absolute { get; set; }
 
         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
         {
             if (value is decimal d)
             {
+                if (Absolute)
+                {
+                    d = Math.Abs(d);
+                }
                 var number = d.ToString("n2");
                 if (MarkVisible)
                 {
@@ -60,6 +67,46 @@ namespace Billing.UI
         }
     }
 
+    public class BalanceColorConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var resource = Application.Current.Resources;
+            if (value is decimal d)
+            {
+                if (d >= 0)
+                {
+                    return resource[BaseTheme.GreenColor];
+                }
+                return resource[BaseTheme.RedColor];
+            }
+            return resource[BaseTheme.TextColor];
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+
+    public class UIBillConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is UIBill bill)
+            {
+                var time = bill.DateCreation.ToString("HH:mm");
+                return $"{time} ({bill.Wallet})";
+            }
+            return string.Empty;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+
     public class NotNullConverter : IValueConverter
     {
         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
@@ -69,7 +116,7 @@ namespace Billing.UI
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            return value;
+            throw new NotImplementedException();
         }
     }
 
@@ -93,7 +140,7 @@ namespace Billing.UI
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            return value;
+            throw new NotImplementedException();
         }
     }
 
@@ -151,7 +198,7 @@ namespace Billing.UI
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            return value;
+            throw new NotImplementedException();
         }
     }
 }

Billing.Shared/UI/Definition.cs

@@ -1,4 +1,8 @@
 using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Xml.Linq;
+using Billing.Models;
 using Xamarin.Forms;
 
 namespace Billing.UI
@@ -75,6 +79,51 @@ namespace Billing.UI
         }
     }
 
+    public static class ModelExtensionHelper
+    {
+        public static List<T> FromStream<T>(Stream stream) where T : IModel, new()
+        {
+            XDocument doc = XDocument.Load(stream);
+            var root = doc.Root;
+            var list = new List<T>();
+            foreach (XElement ele in root.Elements("item"))
+            {
+                if (ele.Attribute("null")?.Value == "1")
+                {
+                    list.Add(default);
+                }
+                else
+                {
+                    T value = new();
+                    value.OnXmlDeserialize(ele);
+                    list.Add(value);
+                }
+            }
+            return list;
+        }
+
+        public static void ToStream<T>(this IEnumerable<T> list, Stream stream) where T : IModel
+        {
+            XElement root = new("root");
+            foreach (var t in list)
+            {
+                XElement item = new("item");
+                if (t == null)
+                {
+                    item.Add(new XAttribute("null", 1));
+                }
+                else
+                {
+                    t.OnXmlSerialize(item);
+                }
+                root.Add(item);
+            }
+
+            XDocument doc = new(new XDeclaration("1.0", "utf-8", "yes"), root);
+            doc.Save(stream, SaveOptions.DisableFormatting);
+        }
+    }
+
     public class Tap : IDisposable
     {
         private readonly static object sync = new();

Billing.Shared/UI/GroupStackLayout.cs

@@ -1,7 +1,4 @@
 using System.Collections;
-using System.Collections.Generic;
-using System.Collections.Specialized;
-using System.Linq;
 using Xamarin.Forms;
 
 namespace Billing.UI