private void _OnSignalREvent(string aEventName, object aEventData)
{
switch (aEventName)
{
case "ProductListCreated":
{
var lEventData = (JObject)aEventData;
var lList = new ProductListDTO()
{
Id = (int)lEventData["Id"],
Name = (string)lEventData["Name"]
};
lock (this.ProductLists)
mProductLists.Add(lList);
_NotifyPropertyChanged("ProductLists");
}
break;
case "ProductListDeleted":
{
var lEventData = (JObject)aEventData;
var lList = mProductLists.FirstOrDefault(aList => aList.Id == (int)lEventData["Id"]);
if (lList != null)
{
lock (this.ProductLists)
mProductLists.Remove(lList);
_NotifyPropertyChanged("ProductLists");
}
}
break;
case "ProductEntryCreated":
{
var lEventData = (JObject)aEventData;
var lList = mProductLists.FirstOrDefault(aList => aList.Id == (int)lEventData["ListId"]);
if (lList != null)
{
var lEntry = new ProductEntryDTO()
{
Id = (int)lEventData["Id"],
ProductName = (string)lEventData["Name"],
Amount = (int)lEventData["Amount"],
Comments = (string)lEventData["Comments"],
OwnerList = lList
};
lEntry.PropertyChanged += _OnProductEntryPropertyChanged;
lock (lList.mProductEntries)
lList.mProductEntries.Add(lEntry);
lList._NotifyPropertyChanged("ProductEntries");
}
}
break;
case "ProductEntryEdited":
{
var lEventData = (JObject)aEventData;
var lList = mProductLists.FirstOrDefault(aList => aList.Id == (int)lEventData["ListId"]);
if (lList != null)
{
var lEntry = lList.ProductEntries.FirstOrDefault(aEntry => aEntry.Id == (int)lEventData["Id"]);
if (lEntry != null)
{
lEntry.Amount = (int)lEventData["Amount"];
lEntry.Comments = (string)lEventData["Comments"];
}
}
}
break;
case "ProductEntryDeleted":
{
var lEventData = (JObject)aEventData;
var lList = mProductLists.FirstOrDefault(aList => aList.Id == (int)lEventData["ListId"]);
if (lList != null)
{
var lEntry = lList.ProductEntries.FirstOrDefault(aEntry => aEntry.Id == (int)lEventData["Id"]);
if (lEntry != null)
{
lock (lList.mProductEntries)
lList.mProductEntries.Remove(lEntry);
lList._NotifyPropertyChanged("ProductEntries");
}
}
}
break;
}
}
public async Task DeleteProductEntry(ProductListDTO aList, ProductEntryDTO aProductEntry)
{
using (this.SetBusy())
{
var lResponse = await mJSONRequester.Delete(this.ServerURL, string.Format(APIConstants.URL_DELETE_PRODUCT_ENTRY, aList.Id, aProductEntry.Id), mRequestHeaders);
lResponse.EnsureSuccessStatusCode();
}
}
public async Task QueryProductEntries(ProductListDTO aList)
{
using (this.SetBusy())
{
var lResponse = await mJSONRequester.Get(this.ServerURL, string.Format(APIConstants.URL_PRODUCT_ENTRIES, aList.Id), mRequestHeaders);
lResponse.EnsureSuccessStatusCode();
List<ProductEntryDTO> lProductEntries = await lResponse.Content.ReadAsAsync<List<ProductEntryDTO>>();
//Unsuscribe from previous event listeners
foreach (var lProductEntry in aList.ProductEntries)
{
lProductEntry.PropertyChanged -= _OnProductEntryPropertyChanged;
lProductEntry.OwnerList = null;
}
//Suscribe to new product entries
foreach (var lProductEntry in lProductEntries)
{
lProductEntry.PropertyChanged += _OnProductEntryPropertyChanged;
lProductEntry.OwnerList = aList;
}
lock (aList.mProductEntries)
{
aList.mProductEntries.Clear();
foreach (var lProductEntry in lProductEntries)
aList.mProductEntries.Add(lProductEntry);
}
aList._NotifyPropertyChanged("ProductEntries");
}
}
public async Task CreateProductList(ProductListDTO aProductList)
{
using (this.SetBusy())
{
var lResponse = await mJSONRequester.Post<ProductListDTO>(this.ServerURL, APIConstants.URL_CREATE_PRODUCT_LIST, aProductList, mRequestHeaders);
lResponse.EnsureSuccessStatusCode();
}
}
private async Task _DeleteProductEntry(ProductListDTO aProductList, ProductEntryDTO aProductEntry)
{
string lErrorMsg = null;
try
{
await APIClient.DeleteProductEntry(aProductList, aProductEntry);
}
catch (Exception ex)
{
//In very high concurrent scenarios race conditions may ocurr, that lead the application to delete an already (just) deleted product entry
if (ex is HttpRequestException && ex.Message.Contains(((int)HttpStatusCode.NotFound).ToString()))
{
//The given product entry was not found (probably already deleted in a race condition) Nothing is done
}
else if (ex is HttpRequestException && ex.Message.Contains(((int)HttpStatusCode.Forbidden).ToString()))
lErrorMsg = "The server rejected the connection. Please update your client to the last version";
else
lErrorMsg = "Error communicating with server";
}
if (lErrorMsg != null)
await _ShowMessageBox_Ok(lErrorMsg);
}
private async Task _DeleteProductEntry(ProductListDTO aProductList, ProductEntryDTO aProductEntry)
{
try
{
await APIClient.DeleteProductEntry(aProductList, aProductEntry);
}
catch (Exception ex)
{
//In very high concurrent scenarios race conditions may ocurr, that lead the application to delete an already (just) deleted product entry
if (ex is HttpRequestException && ex.Message.Contains(((int)HttpStatusCode.NotFound).ToString()))
{
//The given product entry was not found (probably already deleted in a race condition) Nothing is done
}
else if (ex is HttpRequestException && ex.Message.Contains(((int)HttpStatusCode.Forbidden).ToString()))
MessageBox.Show(this, "The server rejected the connection. Please update your client to the last version", "Forbidden", MessageBoxButton.OK, MessageBoxImage.Stop);
else
MessageBox.Show(this, "Error communicating with server", "Network error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}