public IEnumerable <IMetaData> GetMetadatasFromAList(string pathToFile, int numberOfLines, bool order = false)
{
Console.WriteLine($"Inside {nameof(TplDataflow9FullSampleControllerWithExecutionBlocks)} - {nameof(GetMetadatasFromAList)}");
CommonHelpers.CleanWorkingDirectory(SavedImageDirectory);
var listOfMetadata = new List <IMetaData>();
if (string.IsNullOrWhiteSpace(pathToFile))
{
return(Functions.ReturnOnlyOneMetadaInError("The path file is null or empty"));
}
if (numberOfLines < 1)
{
return(Functions.ReturnOnlyOneMetadaInError("You aks for number of line lower than 1"));
}
// Create the members of the pipeline.
var transformBlockStreamTextContent = new TransformBlock <string, string>(uri =>
Functions.StreamTextContent(uri)
);
var transformBlockTranformContentIntoListOfUri = new TransformBlock <string, IList <string> >(content =>
Functions.TranformContentIntoListOfUri(content, numberOfLines)
);
var transformManyBlockTransformListIntoSeveralUris = new TransformManyBlock <IList <string>, string>(listOfUri =>
Functions.TransformListIntoSeveralUris(listOfUri)
);
var transformBlockDownloadImageData = new TransformBlock <string, IMetaData>(url =>
Functions.DownloadImageData(url, SavedImageDirectory)
);
var actionBlockSetStatusOfProcess = new ActionBlock <IMetaData>(metadata =>
Functions.SetStatusOfProcess(listOfMetadata, metadata)
);
// Connect the dataflow blocks to form a pipeline.
transformBlockStreamTextContent.LinkTo(transformBlockTranformContentIntoListOfUri, DataflowOptions.LinkOptions);
transformBlockTranformContentIntoListOfUri.LinkTo(transformManyBlockTransformListIntoSeveralUris, DataflowOptions.LinkOptions);
transformManyBlockTransformListIntoSeveralUris.LinkTo(transformBlockDownloadImageData, DataflowOptions.LinkOptions);
transformBlockDownloadImageData.LinkTo(actionBlockSetStatusOfProcess, DataflowOptions.LinkOptions);
// Start GetMetadatasFromAList pipeline with the input values.
transformBlockStreamTextContent.Post(pathToFile);
// Mark the head of the pipeline as complete.
transformBlockStreamTextContent.Complete();
// Wait for the last block in the pipeline to process all messages.
actionBlockSetStatusOfProcess.Completion.Wait();
return(order
? listOfMetadata.OrderByDescending(metadata => metadata.Status)
: (IEnumerable <IMetaData>)listOfMetadata);
}
