private static bool UpdateCache(string esiSourceDirectoryPath, uint manufacturer, uint productCode, uint revision)
{
// check if source ESI files have been loaded
if (!EsiUtilities.SourceEtherCatInfoSet.Any())
{
EsiUtilities.LoadEsiSource(esiSourceDirectoryPath);
}
// try to find requested device info
(var sourceInfo, var sourceDevice, _) = EsiUtilities.TryFindDevice(EsiUtilities.SourceEtherCatInfoSet, manufacturer, productCode, revision);
if (sourceDevice == null)
{
return(false);
}
lock (_lock)
{
// find matching EtherCATInfo in cache
var cacheInfo = EsiUtilities.CacheEtherCatInfoSet.FirstOrDefault(current =>
{
var vendorId = (uint)EsiUtilities.ParseHexDecString(current.Vendor.Id);
return(vendorId == manufacturer);
});
// extend cache file
if (cacheInfo != null)
{
// add new groups
var cacheGroupSet = cacheInfo.Descriptions.Groups.ToList();
foreach (var sourceGroup in sourceInfo.Descriptions.Groups)
{
if (!cacheGroupSet.Any(current => current.Type == sourceGroup.Type))
{
cacheGroupSet.Add(sourceGroup);
}
}
cacheInfo.Descriptions.Groups = cacheGroupSet.ToArray();
// add found device
cacheInfo.Descriptions.Devices = cacheInfo.Descriptions.Devices.ToList().Concat(new[] { sourceDevice }).ToArray();
}
// create new cache file
else
{
cacheInfo = sourceInfo;
cacheInfo.Descriptions.Devices = new EtherCATInfoDescriptionsDevice[] { sourceDevice };
EsiUtilities.CacheEtherCatInfoSet.Add(cacheInfo);
}
// save new/updated EtherCATInfo to disk
EsiUtilities.SaveEsi(cacheInfo, Path.Combine(_cacheDirectoryPath, $"{cacheInfo.Vendor.Id}.xml"));
}
// return
return(true);
}
public static (EtherCATInfoDescriptionsDevice device, EtherCATInfoDescriptionsGroup group) FindEsi(string esiSourceDirectoryPath, uint manufacturer, uint productCode, uint revision)
{
EtherCATInfoDescriptionsDevice device;
EtherCATInfoDescriptionsGroup group;
// try to find ESI in cache
(_, device, group) = EsiUtilities.TryFindDevice(EsiUtilities.CacheEtherCatInfoSet, manufacturer, productCode, revision);
if (device == null)
{
// update cache
EsiUtilities.UpdateCache(esiSourceDirectoryPath, manufacturer, productCode, revision);
// try to find ESI in cache again
(_, device, group) = EsiUtilities.TryFindDevice(EsiUtilities.CacheEtherCatInfoSet, manufacturer, productCode, revision);
// it finally failed
if (device == null)
{
throw new Exception($"Could not find ESI information of manufacturer '0x{manufacturer:X}' for slave with product code '0x{productCode:X}' and revision '0x{revision:X}'.");
}
}
return(device, group);
}