/// <summary>
/// Loads a layer chain from the given directory.
/// The method looks for a chain.txt file with layer names,
/// and it looks for dll files to create the corresponding layers
///
/// Subchains can be packaged in directories. Just provide another
/// chain.txt file in that directory with the corresponding layers,
/// and include the corresponding dlls.
///
/// Then, in the parent directory, make sure chain.txt lists the folder name
/// as a layer.
/// </summary>
/// <returns>The chain.</returns>
/// <param name="dir">Dir.</param>
public static List <LayerWrapper> LoadChain(string appName, string dir)
{
var toreturn = new List <LayerWrapper>();
//Get the proposed chain from the text file chain.txt,
//and by also recursively visiting subdirectories
//Then create seed layers based on those names and available dlls
//Then use those seed layers to create actual layers for each item in the chain
PythonScriptHost.Instance.ResetEngine();
var layerinfos = RecursiveGetLayerInfos(dir);
var seeds = GetSeedLayers(layerinfos, PythonScriptHost.Instance);
int index = 0;
foreach (LayerInfo info in layerinfos)
{
LayerSeed seed = GetLayerByName(seeds, info.Name);
if (seed == null)
{
throw new Exception("Could not find layer " + info.Name + " in directory " + info.Directory);
}
LayerWrapper toadd = seed.CreateLayerFromSeed(appName, info, index);
index++;
toreturn.Add(toadd);
}
return(toreturn);
}
private static List <LayerWrapper> LoadChainFromSeedLayers(
string appName,
List <LayerSeed> layers,
List <Dictionary <string, object> > parameters)
{
var chain = new List <LayerWrapper>();
for (int i = 0; i < layers.Count; i++)
{
LayerSeed layer = layers[i];
var param = parameters[i];
LayerInfo info = new LayerInfo(null, layer.Seed.Name, param);
LayerWrapper toadd = layer.CreateLayerFromSeed(appName, info, i);
chain.Add(toadd);
}
return(chain);
}