/// <summary>
/// Calculates the diffs asynchronous.
/// </summary>
/// <param name="projectedEntity">The projected entity.</param>
/// <returns></returns>
private async Task <CalculatedDiffsFeedback> CalculateDiffsAsync(ProjectedDiffParts projectedEntity)
{
CheckValidationForCalculatedDiffsParamter(projectedEntity);
var leftFileInfo = new FileInfo(projectedEntity.LeftPartFilePath);
leftFileInfo.Refresh();
long leftPartLength = leftFileInfo.Length;
var rightFileInfo = new FileInfo(projectedEntity.RightPartFilePath);
rightFileInfo.Refresh();
long rightFileLength = rightFileInfo.Length;
if (leftPartLength != rightFileLength)
{
return(new CalculatedDiffsFeedback
{
OperationSucceeded = true,
LeftPartSize = leftPartLength.ToString(),
RightPartSize = rightFileLength.ToString(),
PartsAreEqual = false
});
}
CalculatedDiffsFeedback calculatedDiffs =
await CalculateDiffsForEqualSizeFilesContent(projectedEntity.LeftPartFilePath,
projectedEntity.RightPartFilePath, rightFileLength);
return(calculatedDiffs);
}
/// <summary>
/// Determines whether [is cached calculated diffs valid] [the specified projected entity].
/// </summary>
/// <param name="projectedEntity">The projected entity.</param>
/// <returns>
/// <c>true</c> if [is cached calculated diffs valid] [the specified projected entity]; otherwise, <c>false</c>.
/// </returns>
private bool IsCachedCalculatedDiffsValid(ProjectedDiffParts projectedEntity)
{
return
(!string.IsNullOrWhiteSpace(projectedEntity?.CalculatedDiffsMetadata) &&
projectedEntity.ParsedCalculatedDiffsMetadataTimestamp.HasValue &&
projectedEntity.ParsedLeftPartTimestamp.HasValue && projectedEntity.ParsedRightPartTimestamp.HasValue &&
projectedEntity.ParsedCalculatedDiffsMetadataTimestamp.Value >
projectedEntity.ParsedLeftPartTimestamp.Value &&
projectedEntity.ParsedCalculatedDiffsMetadataTimestamp.Value >
projectedEntity.ParsedRightPartTimestamp.Value);
}
/// <summary>
/// Checks the validation for calculated diffs paramter.
/// </summary>
/// <param name="projectedEntity">The projected entity.</param>
/// <exception cref="System.ArgumentNullException"></exception>
/// <exception cref="System.ArgumentException"></exception>
private void CheckValidationForCalculatedDiffsParamter(ProjectedDiffParts projectedEntity)
{
if (projectedEntity == null)
{
throw new ArgumentNullException($"'{nameof(projectedEntity)}' parameter is null");
}
if (string.IsNullOrEmpty(projectedEntity.LeftPartFilePath) ||
string.IsNullOrEmpty(projectedEntity.RightPartFilePath))
{
throw new ArgumentException($"'{nameof(projectedEntity)}' parameter has invalid properties");
}
if (!File.Exists(projectedEntity.LeftPartFilePath))
{
throw new ArgumentException($"File {projectedEntity.LeftPartFilePath} could not be found");
}
if (!File.Exists(projectedEntity.RightPartFilePath))
{
throw new ArgumentException($"File {projectedEntity.RightPartFilePath} could not be found");
}
}