/// <summary>
/// Fetches prime numbers from existing result files.
/// </summary>
/// <param name="indexedResultFiles">All the result files accompanied with their index.</param>
/// <returns>Container holding information about the loaded prime numbers.</returns>
private ExistingPrimesLoadingResult fetchPrimes(SortedDictionary <int, string> indexedResultFiles)
{
var result = new ExistingPrimesLoadingResult();
var resultFiles = indexedResultFiles
.Select(f => f.Value)
.ToList();
var lastResultFile = resultFiles.LastOrDefault(f => File.ReadLines(f).Any());
for (int i = 0; i < resultFiles.Count; i++)
{
var loadingArgs = new PrimesLoadingFromFile(i, resultFiles.Count);
OnLoadingPrimesFromFile?.Invoke(this, loadingArgs);
var subPrimes = File
.ReadLines(resultFiles[i])
.Select(l => BigInteger.Parse(l));
//Verify that the file contained any prime numbers.
if (subPrimes.Any())
{
//Calculate the next number to check if it's a prime number.
result.NextNumberToCheck = subPrimes.Last() + 1;
}
else
{
//TODO: Test this use case.
return(result);
}
//Store the loaded primes.
result = storeSubPrimesInMemory(result, subPrimes, lastResultFile);
//There's no use in loading any more primes if the memory is full.
if (result.MemoryLimitReached)
{
return(result);
}
//Check if the user cancelled the execution.
if (userPressedEscape())
{
result.ExecutionWasAborted = true;
return(result);
}
}
return(result);
}
/// <summary>
/// Handles the OnLoadingPrimesFromFile event for the object loading existing prime numbers.
/// </summary>
/// <param name="loader">The object loading the existing prime numbers.</param>
/// <param name="args">The information about the event.</param>
private void Loader_OnLoadingPrimesFromFile(object loader, PrimesLoadingFromFile args)
{
OnLoadingPrimesFromFile?.Invoke(loader, args);
}