icon select

Billing.Shared/UI/Converters.cs

@@ -1,6 +1,7 @@
 using Billing.Languages;
 using Billing.Models;
 using System;
+using System.Collections.Generic;
 using System.Globalization;
 using Xamarin.Forms;
 
@@ -95,4 +96,62 @@ namespace Billing.UI
             return value;
         }
     }
+
+    public class IconConverter : IValueConverter
+    {
+        public static readonly Dictionary<string, string> IconPreset = new()
+        {
+            { "alipay", "\uf642" },
+            { "appstore", "\uf370" },
+            { "apple-pay", "\uf416" },
+            { "btc", "\uf15a" },
+            { "jcb", "\uf24b" },
+            { "master-card", "\uf1f1" },
+            { "visa", "\uf1f0" },
+            { "g-pay", "\ue079" },
+            { "paypal", "\uf1ed" },
+            { "qq", "\uf1d6" },
+            { "steam", "\uf1b6" },
+            { "uber", "\uf402" },
+            { "weixin", "\uf1d7" },
+            { "youtube", "\uf167" }
+        };
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is ImageSource source)
+            {
+                return source;
+            }
+            if (value is string name)
+            {
+                if (name.StartsWith("#brand#"))
+                {
+                    var key = name[7..];
+                    if (!IconPreset.TryGetValue(key, out var glyph))
+                    {
+                        if (!int.TryParse(key, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out int i))
+                        {
+                            return ImageSource.FromFile(BaseModel.ICON_DEFAULT);
+                        }
+                        glyph = char.ConvertFromUtf32(i);
+                    }
+                    return new FontImageSource
+                    {
+                        FontFamily = Definition.GetBrandsFontFamily(),
+                        Size = 20,
+                        Glyph = glyph,
+                        Color = Color.Black
+                    };
+                }
+                return ImageSource.FromFile(name);
+            }
+            return null;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value;
+        }
+    }
 }