| | | 1 | | using System; |
| | | 2 | | using System.Collections.Generic; |
| | | 3 | | using System.Linq; |
| | | 4 | | using System.Reflection; |
| | | 5 | | |
| | | 6 | | using Microsoft.Extensions.DependencyInjection; |
| | | 7 | | |
| | | 8 | | namespace Amusoft.Toolkit.Mvvm.Core; |
| | | 9 | | |
| | | 10 | | internal class RestorePropertyRestoreStrategyProvider : IRestoreStrategyProvider |
| | | 11 | | { |
| | | 12 | | private readonly IServiceProvider _serviceProvider; |
| | | 13 | | |
| | 0 | 14 | | public RestorePropertyRestoreStrategyProvider(IServiceProvider serviceProvider) |
| | | 15 | | { |
| | 0 | 16 | | _serviceProvider = serviceProvider; |
| | 0 | 17 | | } |
| | | 18 | | |
| | | 19 | | public IEnumerable<IRestoreStrategy<T>> GetStrategies<T>() |
| | | 20 | | { |
| | 0 | 21 | | yield return new Strategy<T>(_serviceProvider); |
| | 0 | 22 | | } |
| | | 23 | | |
| | | 24 | | private class Strategy<T> : IRestoreStrategy<T> |
| | | 25 | | { |
| | | 26 | | private readonly IServiceProvider _serviceProvider; |
| | | 27 | | |
| | 0 | 28 | | public Strategy(IServiceProvider serviceProvider) |
| | | 29 | | { |
| | 0 | 30 | | _serviceProvider = serviceProvider; |
| | 0 | 31 | | } |
| | | 32 | | |
| | 0 | 33 | | public int Priority { get; } |
| | | 34 | | |
| | | 35 | | public void CollectRestoreInformation(T model) |
| | | 36 | | { |
| | 0 | 37 | | var properties = typeof(T) |
| | 0 | 38 | | .GetProperties(BindingFlags.GetProperty | BindingFlags.SetProperty | BindingFlags.Instance); |
| | 0 | 39 | | Storage = properties |
| | 0 | 40 | | .Where(d => CustomAttributeExtensions.GetCustomAttribute<RestorePropertyAttribute>(d) != null) |
| | 0 | 41 | | .Select(d => (accessor: d, originalValue: d.GetValue(model))) |
| | 0 | 42 | | .ToArray(); |
| | 0 | 43 | | } |
| | | 44 | | |
| | 0 | 45 | | private (PropertyInfo accessor, object? originalValue)[] Storage { get; set; } = []; |
| | | 46 | | |
| | | 47 | | public T Recreate() |
| | | 48 | | { |
| | 0 | 49 | | var instance = _serviceProvider.GetRequiredService<T>(); |
| | 0 | 50 | | foreach (var tuple in Storage) |
| | | 51 | | { |
| | 0 | 52 | | tuple.accessor.SetValue(instance, tuple.originalValue); |
| | | 53 | | } |
| | | 54 | | |
| | 0 | 55 | | return instance; |
| | | 56 | | } |
| | | 57 | | } |
| | | 58 | | } |
| | | 59 | | |
| | | 60 | | /// <summary> |
| | | 61 | | /// Use this attribute to define properties that are persisted to restore the state of a viewmodel if its reference expi |
| | | 62 | | /// </summary> |
| | | 63 | | [AttributeUsage(AttributeTargets.Property)] |
| | | 64 | | public class RestorePropertyAttribute : Attribute |
| | | 65 | | { |
| | | 66 | | } |