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using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data.Entity;
using System.Globalization;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Tango.Core;
using Tango.DAL.Remote.DB;
using Tango.Settings;
namespace Tango.DAL.Remote.ObservableEntities
{
internal static class LoadedObjectsService
{
private static List<KeyValuePair<String, IObservableEntity>> LoadedObjects;
public static Object Get(String guid)
{
return LoadedObjects.SingleOrDefault(x => x.Key == guid).Value;
}
public static void Add(String guid, IObservableEntity observable)
{
if (!LoadedObjects.Exists(x => x.Key == guid))
{
LoadedObjects.Add(new KeyValuePair<string, IObservableEntity>(guid, observable));
}
}
static LoadedObjectsService()
{
LoadedObjects = new List<KeyValuePair<String, IObservableEntity>>();
}
}
public abstract class ObservableEntity<T> : ExtendedObject, IObservableEntity where T : class
{
private Regex regExDAL;
private bool _isNew;
protected T _entity;
private Int32 _id;
[EntityFieldName("ID")]
public Int32 ID
{
get { return _id; }
set { _id = value; RaisePropertyChanged(nameof(ID)); }
}
private String _guid;
[EntityFieldName("GUID")]
public String Guid
{
get { return _guid; }
set { _guid = value; RaisePropertyChanged(nameof(Guid)); }
}
private DateTime _lastUpdated;
[EntityFieldName("LAST_UPDATED")]
public DateTime LastUpdated
{
get { return _lastUpdated; }
set { _lastUpdated = value; RaisePropertyChanged(nameof(LastUpdated)); }
}
private bool _deleted;
[EntityFieldName("DELETED")]
public bool Deleted
{
get { return _deleted; }
set { _deleted = value; RaisePropertyChanged(nameof(Deleted)); }
}
public ObservableEntity()
{
_entity = Activator.CreateInstance<T>();
_isNew = true;
}
public ObservableEntity(T entity)
{
_entity = entity;
regExDAL = new Regex(@"
(?<=[A-Z])(?=[A-Z][a-z]) |
(?<=[^A-Z])(?=[A-Z]) |
(?<=[A-Za-z])(?=[^A-Za-z])", RegexOptions.IgnorePatternWhitespace);
}
public static void MapEntityToObservable(Object entity, IObservableEntity observable)
{
String guid = entity.GetType().GetProperty("GUID").GetValue(entity).ToString();
LoadedObjectsService.Add(guid, observable);
foreach (var prop in entity.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
String name = prop.Name == "ID" ? "ID" : DalNameToStandardName(prop.Name);
if (prop.PropertyType.IsGenericType)
{
object observableCollection = observable.GetType().GetProperty(name).GetValue(observable);
Type genericType = observable.GetType().GetProperty(name).PropertyType.GenericTypeArguments.Single();
foreach (var item in prop.GetValue(entity) as IEnumerable)
{
guid = item.GetType().GetProperty("GUID").GetValue(item).ToString();
var loadedEntity = LoadedObjectsService.Get(guid);
if (loadedEntity != null)
{
observableCollection.GetType().GetMethod("Add").Invoke(observableCollection, new object[] { loadedEntity });
}
else
{
IObservableEntity newObservable = Activator.CreateInstance(genericType, new object[] { item }) as IObservableEntity;
LoadedObjectsService.Add(guid, newObservable);
observableCollection.GetType().GetMethod("Add").Invoke(observableCollection, new object[] { newObservable });
}
}
}
else if (prop.PropertyType.IsClass && prop.PropertyType != typeof(String) && prop.PropertyType != typeof(DateTime))
{
Type propType = observable.GetType().GetProperty(name).PropertyType;
guid = prop.GetValue(entity).GetType().GetProperty("GUID").GetValue(prop.GetValue(entity)).ToString();
var loadedEntity = LoadedObjectsService.Get(guid);
if (loadedEntity != null)
{
observable.GetType().GetProperty(name).SetValue(observable, loadedEntity);
}
else
{
IObservableEntity newObservable = Activator.CreateInstance(propType, new object[] { prop.GetValue(entity) }) as IObservableEntity;
LoadedObjectsService.Add(guid, newObservable);
observable.GetType().GetProperty(name).SetValue(observable, newObservable);
}
}
else
{
observable.GetType().GetProperty(name).SetValue(observable, prop.GetValue(entity));
}
}
}
public void Save()
{
using (RemoteDB db = new RemoteDB(SettingsManager.Default.DataBase.SQLServerAddress, false))
{
foreach (var prop in this.GetType().GetProperties())
{
String dalName = (prop.GetCustomAttributes(typeof(EntityFieldNameAttribute), false).SingleOrDefault() as EntityFieldNameAttribute).Name;
typeof(T).GetProperty(dalName).SetValue(_entity, prop.GetValue(this));
}
if (_isNew)
{
String tabelName = this.GetType().Name.ToUpper();
DbSet<T> dbSet = typeof(RemoteDB).GetProperty(tabelName) as DbSet<T>;
dbSet.Add(_entity);
}
db.SaveChanges();
MapEntityToObservable(_entity, this);
_isNew = false;
}
}
public static String DalNameToStandardName(String dalName)
{
return String.Join("", dalName.Split('_').Select(x => ToTitleCase(x)));
}
public static string ToTitleCase(string s)
{
return CultureInfo.CurrentCulture.TextInfo.ToTitleCase(s.ToLower());
}
}
}
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