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using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL;
using Tango.BL.Entities;
using Tango.Core.ExtensionMethods;
namespace Tango.DataStore.EF
{
public class EFDataStoreCollection : IDataStoreCollection
{
public string Name { get; }
public EFDataStoreCollection(String name)
{
Name = name;
}
public void Put<T>(string key, T value)
{
Put(key, (object)value);
}
public void Put(string key, object value)
{
Put(key, DataStoreHelper.GetDataType(value), value);
}
public void Put(string key, DataType type, object value)
{
using (var db = ObservablesContext.CreateDefault())
{
var globalItem = db.GlobalDataStoreItems.FirstOrDefault(x => x.CollectionName == Name && x.Key == key);
if (globalItem != null)
{
if (globalItem.DataType != (int)type)
{
throw new InvalidOperationException("A global data store item exists with the same key, but different data type.");
}
}
DataStoreItem item = db.DataStoreItems.SingleOrDefault(x => x.CollectionName == Name && x.Key == key);
if (item == null)
{
item = new DataStoreItem();
db.DataStoreItems.Add(item);
}
item.CollectionName = Name;
item.Key = key;
item.DataType = (int)type;
item.Value = EFDataStoreHelper.CreateBytes(type, value);
item.IsSynchronized = false;
item.LastUpdated = DateTime.UtcNow;
item.IsDeleted = false;
db.SaveChanges();
}
}
public T Get<T>(string key)
{
return (T)Get(key, null);
}
public T Get<T>(string key, T defaultValue)
{
return (T)Get(key, (object)defaultValue);
}
public object Get(string key)
{
return Get(key, null);
}
public object Get(string key, object defaultValue)
{
return GetItem(key, defaultValue).Value;
}
public IDataStoreItem GetItem(string key)
{
return GetItem(key, null);
}
public IDataStoreItem GetItem(string key, object defaultValue)
{
using (var db = ObservablesContext.CreateDefault())
{
var item = db.DataStoreItems.SingleOrDefault(x => x.CollectionName == Name && x.Key == key && !x.IsDeleted);
if (item == null)
{
var globalItem = db.GlobalDataStoreItems.SingleOrDefault(x => x.CollectionName == Name && x.Key == key);
if (globalItem == null)
{
if (defaultValue == null)
{
throw new KeyNotFoundException("The specified data store key was not found.");
}
else
{
Put(key, defaultValue);
return GetItem(key);
}
}
else
{
return globalItem.ToDataStoreItem();
}
}
return item.ToDataStoreItem();
}
}
public List<IDataStoreItem> GetAll()
{
using (var db = ObservablesContext.CreateDefault())
{
var localItems = db.DataStoreItems.Where(x => x.CollectionName == Name && !x.IsDeleted).ToList();
var globalItems = db.GlobalDataStoreItems.Where(x => x.CollectionName == Name).ToList();
foreach (var globalItem in globalItems.ToList())
{
var localItem = localItems.FirstOrDefault(x => x.CollectionName == globalItem.CollectionName && x.Key == globalItem.Key);
if (localItem != null)
{
globalItems.Remove(globalItem);
}
}
return localItems.Select(x => x.ToDataStoreItem()).Concat(localItems.Select(x => x.ToDataStoreItem())).ToList();
}
}
public List<IDataStoreItem> GetUnsynchronized()
{
using (var db = ObservablesContext.CreateDefault())
{
return db.DataStoreItems.Where(x => x.CollectionName == Name && !x.IsSynchronized).ToList().Select(x => x.ToDataStoreItem()).ToList();
}
}
public void Delete(string key)
{
using (var db = ObservablesContext.CreateDefault())
{
db.Database.ExecuteSqlCommand($"DELETE FROM DATA_STORE_ITEMS WHERE COLLECTION_NAME = '{Name}' AND [KEY] = '{key}'");
}
}
public void DeleteAll()
{
using (var db = ObservablesContext.CreateDefault())
{
db.Database.ExecuteSqlCommand($"DELETE FROM DATA_STORE_ITEMS WHERE COLLECTION_NAME = '{Name}'");
}
}
public int Count()
{
using (var db = ObservablesContext.CreateDefault())
{
return db.DataStoreItems.Count(x => x.CollectionName == Name);
}
}
}
}
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