/// <summary>
/// Create a feed
/// </summary>
/// <param name="options">Feed configuration options</param>
/// <returns>true if feed creation is successful, false otherwise</returns>
public bool CreateFeed(FeedOptions options)
{
string feedFile = Path.Combine(options.FeedDataPath, options.FeedFileName);
if (File.Exists(feedFile) && !options.OverwriteFeedFile)
{
UpdateStatus(100, "Feed File Already Exists. You should either chose to overwrite the feed file or provide a different name.", false);
return(false);
}
string criteria = "VisibilityId<>" + (short)CatalogVisibility.Private;
if (!options.IncludeAllProducts)
{
criteria = criteria + " AND ExcludeFromFeed=0";
}
string headerRow = GetHeaderRow();
if (!headerRow.EndsWith("\r\n"))
{
headerRow += "\r\n";
}
try
{
using (StreamWriter feedWriter = File.CreateText(feedFile))
{
feedWriter.Write(headerRow);
feedWriter.Close();
}
}
catch (System.UnauthorizedAccessException accessException)
{
UpdateStatus(100, "Access restricted on feed data folder. In order to create feeds, the current user (" + Misc.GetProcessIdentity() + ") needs write access to feeds data folder.", false);
UpdateStatus(100, "Access exception : " + accessException.Message, false);
return(false);
}
bool needTokenReset = false;
if (Token.Instance.Store == null)
{
Store store = StoreDataSource.Load(options.StoreId);
Token.Instance.InitStoreContext(store);
needTokenReset = true;
}
try
{
using (StreamWriter feedWriter = File.AppendText(feedFile))
{
ProductCollection products;
int count = ProductDataSource.CountForCriteria(criteria);
int startIndex = 0;
while (startIndex < count)
{
// DETERMINE HOW MANY ROWS LEFT TO INCLUDE IN FEED
int rowsRemaining = count - startIndex;
// ONLY PROCESS 1000 ROWS AT A TIME
int maxRows = (rowsRemaining > 1000) ? 1000 : rowsRemaining;
// CALCULATE PROGRESS PERCENTAGE AND DISPLAY PROGRESS
int percentDone = startIndex / count * 100;
UpdateStatus(percentDone, "Generating feed for products from " + startIndex + " to " + (startIndex + maxRows) + " out of " + count + " products.");
// GET THE ROWS TO BE OUTPUT
products = ProductDataSource.LoadForCriteria(criteria, maxRows, startIndex);
// GENERATE THE FEED DATA
string feedData = GetFeedData(products);
// WRITE DATA TO THE FEED FILE
if (!feedData.EndsWith("\r\n"))
{
feedData += "\r\n";
}
feedWriter.Write(feedData);
feedWriter.Flush();
// LOOP TO THE NEXT BLOCK OF DATA
startIndex += 1000;
}
// CLOSE THE FEED FILE
feedWriter.Close();
}
}
catch (Exception e)
{
Logger.Warn("Error Feed Creator Thread : " + e.Message, e);
UpdateStatus(100, "Error while creating feed file." + e.Message, false);
return(false);
}
finally
{
if (needTokenReset)
{
Token.ResetInstance();
}
}
UpdateStatus(100, string.Format("Feed file generated at {0}.", options.FeedDataPath), true);
return(true);
}
