/// <summary>
/// This method is responsible for persisting the incoming image into the database.
/// </summary>
/// <param name="idCompare">Id that the image belongs to</param>
/// <param name="model">Instance of a class that contains the base64 encoded string</param>
/// <param name="imageSide">Enum value that indicates the image side - ( 0 = Left and 1 = Right )</param>
/// <returns></returns>
public ValidationResultViewModel AddImage(int idCompare, IncomeImageViewModel model, Constants.ImageSide imageSide)
{
ValidationResultViewModel modelReturn = new ValidationResultViewModel();
WAESImage item = _waesImageService.GetBySenderIdAndSide(idCompare, (int)imageSide);
//I decided to remove the previous record, if exists, to keep comparison clear
if (item != null)
{
Logger.LogInfo("Removing previous '" + SharedMethods.GetEnumDescription(imageSide) + "' image of Id '" + idCompare + "'");
BeginTransaction();
_waesImageService.Remove(item);
Commit();
}
//Validating if the image content is valid
if (SharedMethods.IsBase64Valid(model.Base64Image))
{
Logger.LogInfo("Creating new '" + SharedMethods.GetEnumDescription(imageSide) + "' image of Id '" + idCompare + "'");
//Creating the instance of the model to persist on database
item = new WAESImage()
{
IdCompare = idCompare,
Side = (int)imageSide
};
item.ImageContent = Convert.FromBase64String(model.Base64Image);
//Validating the model before persist
if (item.IsValid())
{
try
{
BeginTransaction();
_waesImageService.Add(item);
Commit();
modelReturn = MountReturn(Constants.PossibleReturns.SUCCESSFULLY_SAVED);
modelReturn.Message = String.Format(modelReturn.Message, idCompare);
}
catch (Exception ex)
{
modelReturn = MountReturn(Constants.PossibleReturns.ERROR);
modelReturn.Message = modelReturn.Message + " : " + ex.Message;
}
}
else
{
modelReturn = MountReturn(Constants.PossibleReturns.ERROR);
}
}
else
{
modelReturn = MountReturn(Constants.PossibleReturns.INVALID_BASE64_PARAMETER);
}
Logger.LogInfo(modelReturn.Message);
return(modelReturn);
}
public void Shall_Accept_Valid_Properties()
{
_waesImage = new WAESImage()
{
IdCompare = 1,
ImageContent = Convert.FromBase64String(validImage),
Side = (int)Constants.ImageSide.Left
};
Assert.IsTrue(_waesImage.IsValid());
}
public void Shall_Not_Accept_Invalid_Side()
{
_waesImage = new WAESImage()
{
IdCompare = 1,
ImageContent = Convert.FromBase64String(validImage),
Side = 3
};
Assert.IsFalse(_waesImage.IsValid());
}
public void Shall_Not_Accept_Non_Positive_Id()
{
_waesImage = new WAESImage()
{
IdCompare = -1,
ImageContent = Convert.FromBase64String(validImage),
Side = (int)Constants.ImageSide.Left
};
Assert.IsFalse(_waesImage.IsValid());
}
public void Shall_Not_Accept_Null_Content()
{
_waesImage = new WAESImage()
{
IdCompare = 1,
ImageContent = null,
Side = (int)Constants.ImageSide.Left
};
Assert.IsFalse(_waesImage.IsValid());
}
/// <summary>
/// This method is responsible for comparing previously registered images based on the incoming id
/// </summary>
/// <param name="idCompare">Id for finding previously registered images</param>
/// <returns></returns>
public ValidationResultViewModel CompareImages(int idCompare)
{
ValidationResultViewModel modelReturn = new ValidationResultViewModel();
int left = (int)Constants.ImageSide.Left;
int right = (int)Constants.ImageSide.Right;
//Creating the list base on the incoming Id
List <WAESImage> listItems = _waesImageService.GetAllBySenderId(idCompare).ToList();
//Verifying the size of the list, and then processing the correct action based on list size
switch (listItems.Count())
{
case 0: // Case the list is empty, return the message where no files associated with the incoming Id were found
{
modelReturn = MountReturn(Constants.PossibleReturns.NO_FILES);
modelReturn.Message = String.Format(modelReturn.Message, idCompare);
break;
}
case 1: // Case there is only one image, must identify missing item side to return the correct message
{
modelReturn = MountReturn(Constants.PossibleReturns.FILE_NOT_FOUND);
string messageSide = "Left";
WAESImage item = _waesImageService.GetBySenderIdAndSide(idCompare, left);
if (item != null)
{
messageSide = "Right";
}
modelReturn.Message = String.Format(modelReturn.Message, messageSide);
break;
}
case 2: // Ok, there are 2 files, so must compare the images and return proper message
{
//Variable that will indicate that there are different pixels within two images with the same size
int numberOfDiffs = 0;
// Here I'm invoking a method that compares two different images. This method belongs to a shared library present in
// the WAS.Infra.CrossCutting.Utilities project, I decided to put this method there to respect the Single Responsibility principle
// If true, it means that the images have same size, but if numberOfDiffs > 0, then images have same size, but they are different
// if false, it means that the images are different
if (SharedMethods.GetDifferenceBetweenImages(listItems.Where(x => x.Side.Equals(left)).FirstOrDefault().ImageContent, listItems.Where(x => x.Side.Equals(right)).FirstOrDefault().ImageContent, ref numberOfDiffs))
{
if (numberOfDiffs > 0)
{
modelReturn = MountReturn(Constants.PossibleReturns.SAME_SIZE_DIFFERENT);
modelReturn.Message = String.Format(modelReturn.Message, idCompare);
Logger.LogInfo(modelReturn.Message);
}
else
{
modelReturn = MountReturn(Constants.PossibleReturns.EQUAL_FILES);
modelReturn.Message = String.Format(modelReturn.Message, idCompare);
}
}
else
{
modelReturn = MountReturn(Constants.PossibleReturns.DIFFERENT_FILES);
modelReturn.Message = String.Format(modelReturn.Message, idCompare);
}
break;
}
}
Logger.LogInfo(modelReturn.Message);
return(modelReturn);
}
