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using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
namespace Tango.BL
{
public abstract class ObservableEntityDTO<DTO, T> : IObservableEntityDTO, IEquatable<T> where T : IObservableEntity where DTO : ObservableEntityDTO<DTO, T>
{
public int ID { get; set; }
public String Guid { get; set; }
public DateTime LastUpdated { get; set; }
public static DTO FromObservable(T observable)
{
if (observable == null) return null;
var dto = Activator.CreateInstance<DTO>();
foreach (var prop in typeof(DTO).GetProperties())
{
var observableProp = typeof(T).GetProperty(prop.Name);
if (observableProp != null)
{
if (prop.PropertyType.IsPrimitive || prop.PropertyType.IsValueType || prop.PropertyType == typeof(String))
{
prop.SetValue(dto, observableProp.GetValue(observable));
}
else if (!prop.PropertyType.IsGenericType)
{
prop.SetValue(dto, prop.PropertyType.GetMethod(nameof(FromObservable), BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy).Invoke(null, new object[] { observableProp.GetValue(observable) }));
}
else
{
IList collection = Activator.CreateInstance(prop.PropertyType) as IList;
IList source = observableProp.GetValue(observable) as IList;
foreach (var item in source)
{
collection.Add(prop.PropertyType.GenericTypeArguments[0].GetMethod(nameof(FromObservable), BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy).Invoke(null, new object[] { item }));
}
prop.SetValue(dto, collection);
}
}
}
return dto;
}
public T ToObservable()
{
T observable = Activator.CreateInstance<T>();
MapToObservable(observable);
return observable;
}
public void MapToObservable(T observable)
{
foreach (var prop in typeof(DTO).GetProperties())
{
var observableProp = typeof(T).GetProperty(prop.Name);
if (observableProp != null)
{
if (prop.PropertyType.IsPrimitive || prop.PropertyType.IsValueType || prop.PropertyType == typeof(String))
{
observableProp.SetValue(observable, prop.GetValue(this));
}
else if (!prop.PropertyType.IsGenericType)
{
var propInstance = prop.GetValue(this);
if (propInstance != null)
{
var observableInstance = observableProp.GetValue(observable);
if (observableInstance == null)
{
observableInstance = Activator.CreateInstance(observableProp.PropertyType);
observableProp.SetValue(observable, observableInstance);
}
var method = prop.PropertyType.GetRuntimeMethod(nameof(MapToObservable), new Type[] { observableProp.PropertyType });
method.Invoke(propInstance, new object[] { observableInstance });
}
}
else
{
IList collection = prop.GetValue(this) as IList;
IList observableCollection = observableProp.GetValue(observable) as IList;
if (collection != null)
{
foreach (var item in collection)
{
bool found = false;
foreach (var o in observableCollection)
{
var dtoItem = item as IObservableEntityDTO;
var observableItem = o as IObservableEntity;
if (dtoItem.Guid.Equals(observableItem.Guid))
{
var method = dtoItem.GetType().GetRuntimeMethod(nameof(MapToObservable), new Type[] { observableItem.GetType() });
method.Invoke(dtoItem, new object[] { observableItem });
found = true;
break;
}
}
if (!found)
{
var observableItem = Activator.CreateInstance(observableProp.PropertyType.GenericTypeArguments[0]);
var method = item.GetType().GetRuntimeMethod(nameof(MapToObservable), new Type[] { observableItem.GetType() });
method.Invoke(item, new object[] { observableItem });
observableCollection.Add(observableItem);
}
}
}
}
}
}
}
public bool EqualsToObservable(T observable)
{
if (observable == null) return false;
foreach (var prop in typeof(DTO).GetProperties())
{
var observableProp = typeof(T).GetProperty(prop.Name);
if (observableProp != null)
{
if (prop.PropertyType.IsPrimitive || prop.PropertyType.IsValueType || prop.PropertyType == typeof(String))
{
var observableValue = observableProp.GetValue(observable);
var dtoValue = prop.GetValue(this);
if (dtoValue == null && observableValue != null) return false;
if (dtoValue != null && observableValue == null) return false;
if (dtoValue != null && observableValue != null)
{
if (!dtoValue.Equals(observableValue))
{
return false;
}
}
}
else if (!prop.PropertyType.IsGenericType)
{
var propInstance = prop.GetValue(this);
var observableInstance = observableProp.GetValue(observable);
if (propInstance == null && observableInstance != null) return false;
if (propInstance != null)
{
var method = prop.PropertyType.GetRuntimeMethod(nameof(EqualsToObservable), new Type[] { observableInstance.GetType() });
if (!((bool)method.Invoke(propInstance, new object[] { observableInstance })))
{
return false;
}
}
}
else
{
IList source = observableProp.GetValue(observable) as IList;
IList collection = prop.GetValue(this) as IList;
if (collection == null && source != null) return false;
if (source == null && collection != null) return false;
if (source != null && collection != null)
{
if (source.Count != collection.Count) return false;
for (int i = 0; i < source.Count; i++)
{
var item = collection[i];
var itemSource = source[i];
var method = item.GetType().GetRuntimeMethod(nameof(EqualsToObservable), new Type[] { itemSource.GetType() });
if (item == null && itemSource != null) return false;
if (!((bool)method.Invoke(item, new object[] { itemSource })))
{
return false;
}
}
}
}
}
}
return true;
}
public bool Equals(T observable)
{
return EqualsToObservable(observable);
}
}
}
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