public void ComputeChecksum_MD5_InputFile()
{
var tempDirectory = PathHelper.GetTemporaryDirectory();
var filepath = PathHelper.CreateTmpFile(tempDirectory);
var photo = new Photo("");
var cs = new Checksum(Algorithm.MD5);
using var fs = File.OpenRead(filepath);
// Assign checksum to photo object
photo.Checksum = cs.ComputeChecksum(fs);
// Reset stream
fs.Position = 0;
// Compute checksum using expected behavior
using var md5 = MD5.Create();
var md5hash = md5.ComputeHash(fs);
var expected = BitConverter.ToString(md5hash)
.Replace("-", string.Empty)
.ToLowerInvariant();
Assert.Equal(expected, photo.Checksum);
}
public void Checksum_ComputeChecksum_NullStream()
{
using var cs = new Checksum(Algorithm.MD5);
var actual = cs.ComputeChecksum(null);
Assert.Null(actual);
}
public void Checksum_ComputeChecksum_NoneAlgorithm()
{
var stream = new MemoryStream(Encoding.UTF8.GetBytes("Hello, World!"));
var cs = new Checksum(Algorithm.None);
var actual = cs.ComputeChecksum(stream);
Assert.Null(actual);
}
/// <summary>
/// Runs the organizer by recursively searching every directory from the given <paramref name="inputDirectory" />.
/// </summary>
/// <param name="inputDirectory">Path to initial directory to search for media files.</param>
/// <param name="database">Indicates whether a database is used.</param>
public async Task RunOrganizerAsync(string inputDirectory)
{
// if input directory does not exist, throw exception and end run
inputDirectory.EnsureDirectoryExists();
// preliminary setup
var hashAlgorithm = _configuration.GetValue <Algorithm>("hash-algorithm");
var checksum = new Checksum(hashAlgorithm);
var photoCounter = 0;
if (!(_context is null))
{
await _context.Database.EnsureCreatedAsync();
}
_logger.LogInformation($"Begin organizing in { inputDirectory }");
await foreach (var photo in PhotoHandler.FindPhotosAsync(inputDirectory))
{
using var fs = File.OpenRead(photo.FilePath);
// Compute checksum
photo.Checksum = checksum.ComputeChecksum(fs);
// Reset filestream position
fs.Position = 0;
// Fetch metadata directories using MetadataExctractor and parse metadata to the Photo object
var metadataDirectories = ImageMetadataReader.ReadMetadata(fs);
ParseMetadata.Parse(photo, metadataDirectories);
// Rename and sort photos
_sortService.SortPhoto(photo);
// Add photo to database context if it does not exist already
if (!(_context is null) && !await _context.Photos.AnyAsync(p => p.Name == photo.Name))
{
await _context.Photos.AddAsync(photo);
}
photoCounter++;
}
if (!(_context is null))
{
// Save all additions to the database
await _context.SaveChangesAsync();
}
_logger.LogInformation($"End organizing. Organized { photoCounter } photos.");
}
public void Checksum_ComputeChecksum_SHA256()
{
var stream = new MemoryStream(Encoding.UTF8.GetBytes("Hello, World!"));
using var cs = new Checksum(Algorithm.SHA256);
// Compute checksum, consuming stream
var actual = cs.ComputeChecksum(stream);
// Reset stream
stream.Position = 0;
// Compute checksum using expected behavior
using var sha256 = SHA256.Create();
var sha256hash = sha256.ComputeHash(stream);
var expected = BitConverter.ToString(sha256hash)
.Replace("-", string.Empty)
.ToLowerInvariant();
Assert.Equal(expected, actual);
}
