ItemUpdate GetItemUpdate(string directory, Item item, int index, int requestNumber)
{
try
{
if (Interlocked.CompareExchange(ref this.requestNumber, requestNumber, requestNumber) != requestNumber)
{
return(null);
}
string version = null;
var fullName = Path.Combine(directory, item.Name);
var updateTime = default(DateTime);
if (item.Extension.ToLower() == ".jpg")
{
using (var er = new ExifReader(fullName))
{
DateTime exifTime;
if (er.GetTagValue <DateTime>(ExifReader.ExifTags.DateTimeOriginal, out exifTime))
{
updateTime = exifTime;
}
}
}
else
{
version = FileVersion.Get(fullName);
}
if (!string.IsNullOrEmpty(version) || updateTime != default(DateTime))
{
return(new ItemUpdate(index, version, updateTime));
}
return(null);
}
catch (Exception)
{
return(null);
}
}