public void TestEanCodes()
{
using (StreamReader sr = new StreamReader(SimpleTestPath)) {
string currentLine;
// currentLine will be null when the StreamReader reaches the end of file
while ((currentLine = sr.ReadLine()) != null) {
EanEicCode code = new EanEicCode(currentLine.Split(";".ToCharArray())[0]);
CheckResultCode expectedResult = (CheckResultCode)Enum.Parse(typeof(CheckResultCode), currentLine.Split(";".ToCharArray())[1]);
CheckResult res = _service.CheckCode(code);
Assert.AreEqual(res.ResultCode, expectedResult);
}
}
}
public CheckResult Post(EanEicCode code)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
request.ContentType = "application/json;charset=utf-8";
var encoding = new UTF8Encoding();
byte[] bytes = encoding.GetBytes(javaScriptSerializer.Serialize(code));
request.ContentLength = bytes.Length;
using (Stream requestStream = request.GetRequestStream()) {
requestStream.Write(bytes, 0, bytes.Length);
}
Stream responseStream = request.GetResponse().GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
return javaScriptSerializer.Deserialize<CheckResult>(reader.ReadToEnd());
}
public CheckResult CheckCode(EanEicCode code)
{
if (code == null || string.IsNullOrEmpty(code.Code))
{
return new CheckResult(CheckResultCode.NoCodeSupplied);
}
//EAN prefix
if (code.Code.Length >= 2 && code.Code.Substring(0, 2) == "85")
{
return ValidateEan(code);
}
//EIC prefix
if (code.Code.Length >= 2 && code.Code.Substring(0, 2) == "27")
{
return ValidateEic(code);
}
//Prefix did not match
return new CheckResult(CheckResultCode.CodePrefixInvalid);
}
private CheckResult ValidateEic(EanEicCode code)
{
if (code.Code.Length != 16)
{
return new CheckResult(CheckResultCode.EicInvalidLength);
}
// EIC check character computation algorithm from page 32-33 from the https://www.entsoe.eu/Documents/EDI/Library/2015-0612_451-n%20EICCode_Data_exchange_implementation_guide_final.pdf
IEnumerable<int> numericEncodingOfEic;
try
{
//Step 1&2
numericEncodingOfEic = GetNumericEicEncoding(code.Code);
}
catch (InvalidCharacterInEic)
{
return new CheckResult(CheckResultCode.EicInvalidCharacter);
}
//Step 3&4
IEnumerable<int> weightedList = getWeightedListEic(numericEncodingOfEic.Take(15));
//Step 5
int sumOfWeights = weightedList.Sum();
//Step 6
int modulo37 = 36 - ((sumOfWeights - 1)%37);
char checkChar = EncodeIntToChar(modulo37);
if (checkChar == code.Code.Last())
{
return new CheckResult(CheckResultCode.EicOk);
}
return new CheckResult(CheckResultCode.EicInvalidCheckCharacter);
}
private static CheckResult ValidateEan(EanEicCode code)
{
if (code.Code.Length != 18)
{
return new CheckResult(CheckResultCode.EanInvalidLength);
}
// sum = EAN[0] * 3 + EAN[1] + EAN[2] * 3 + EAN[3] + ... + EAN[16] * 3
int sum = 0;
for (int i = 0; i < 17; i++)
{
int digit = code.Code[i] - '0';
if (digit < 0 || digit > 9)
{
return new CheckResult(CheckResultCode.EanInvalidCharacter);
}
if (i%2 == 0)
{
sum += digit*3;
}
else
{
sum += digit;
}
}
int lastDigit = code.Code[17] - '0';
int checkSum = Ceiling(sum, 10) - sum;
if (lastDigit == checkSum)
{
return new CheckResult(CheckResultCode.EanOk);
}
return new CheckResult(CheckResultCode.EanInvalidCheckCharacter);
}
