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));
}
public bool TryAccess(string username, EanEicCode code)
{
int accessCount = _userAccessRepository.GetUserAccessCount(username, _timeWindow);
// _userAccessRepository.RecordAccess(username, code);
return(accessCount < _maxAccessCount);
}
public bool TryGetOpm(EanEicCode code, out Opm opmForCode)
{
if (code == null)
{
opmForCode = null;
return(false);
}
return(_repository.TryGetValue(code, out opmForCode));
}
public void AddAndCheck()
{
EanEicCode c1 = new EanEicCode("859182400123456789");
EanEicCode c2 = new EanEicCode("859182400123456789");
Assert.AreEqual(c1, c2);
repository.TryAdd(new Opm(validCode));
// repository.TryGetOpm()
}
public bool TryRemoveOpm(EanEicCode code)
{
if (code == null)
{
return(false);
}
Opm opm;
return(_repository.TryRemove(code, out opm));
}
public void AddAndCheck()
{
EanEicCode c1 = new EanEicCode("859182400123456789");
EanEicCode c2 = new EanEicCode("859182400123456789");
Assert.AreEqual(c1, c2);
repository.TryAdd(new Opm(validCode));
// repository.TryGetOpm()
}
public OpmVerificationResult VerifyOpm(string codeString, string username)
{
EanEicCode code = new EanEicCode(codeString);
if (UserAccessService.TryAccess(username, code))
{
OpmVerificationResult result = VerifyOpm(code);
return(result);
}
throw new UserAccessLimitViolationException();
}
private OpmVerificationResult Verify(EanEicCode code)
{
CheckResult codeValid = EanEicCheckerHttpClient.Post(code);
if (codeValid.ResultCode != CheckResultCode.EanOk && codeValid.ResultCode != CheckResultCode.EicOk) {
//TODO SP: what to do now - maybe better to just return 'false'
throw new ArgumentException("The supplied code is not valid." + "\n" + codeValid.Description);
}
//OK, code is valid, try to find it in the OpmRepository
Opm opmForCode;
if (OpmRepository.TryGetOpm(code, out opmForCode)) {
return new OpmVerificationResult(true);
}
return new OpmVerificationResult(false);
}
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 bool TryGetOpm(EanEicCode code, out Opm opmForCode)
{
try
{
_log.Debug(m => m("Trying to fetch Opm code=[" + " code.ToString() " + "]."));
tbl_duplicate_opms dbOpm = _dbContext.tbl_duplicate_opms.SingleOrDefault(o => o.tdo_ean.Equals(code.Code));
opmForCode = new Opm(new EanEicCode(dbOpm.tdo_ean));
_log.Debug("Opm code=[" + " code.ToString() " + "] found in repository.");
return(true);
}
catch
{
opmForCode = null;
_log.Error("Opm could not be fetched from repository. Exception thrown.");
return(false);
}
}
public bool TryRemoveOpm(EanEicCode code)
{
try {
_log.Debug("Removal of Opm code=[" + " code.ToString() " + "] started.");
tbl_duplicate_opms entityToRemove = _dbContext.tbl_duplicate_opms.FirstOrDefault(opm => opm.tdo_ean.Equals(code.Code));
if (entityToRemove == null)
{
return(false);
}
_dbContext.tbl_duplicate_opms.Remove(entityToRemove);
_dbContext.SaveChanges();
_log.Debug("Removal of Opm code=[" + " code.ToString() " + "] finished.");
return(true);
} catch {
_log.Error("Removal of Opm failed with an exception.");
return(false);
}
}
private OpmVerificationResult Verify(EanEicCode code)
{
CheckResult codeValid = EanEicCheckerHttpClient.Post(code);
if (codeValid.ResultCode != CheckResultCode.EanOk && codeValid.ResultCode != CheckResultCode.EicOk)
{
throw new EanEicCodeInvalidException();
}
//OK, code is valid, try to find the record in the OpmRepository
Opm opmForCode;
if (OpmRepository.TryGetOpm(code, out opmForCode))
{
return(new OpmVerificationResult(true));
}
return(new OpmVerificationResult(false));
}
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());
}
private OpmVerificationResult Verify(EanEicCode code)
{
CheckResult codeValid = EanEicCheckerHttpClient.Post(code);
if (codeValid.ResultCode != CheckResultCode.EanOk && codeValid.ResultCode != CheckResultCode.EicOk)
{
//TODO SP: what to do now - maybe better to just return 'false'
throw new ArgumentException("The supplied code is not valid." + "\n" + codeValid.Description);
}
//OK, code is valid, try to find it in the OpmRepository
Opm opmForCode;
if (OpmRepository.TryGetOpm(code, out opmForCode))
{
return(new OpmVerificationResult(true));
}
return(new OpmVerificationResult(false));
}
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 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));
}
public bool TryRemoveOpm(EanEicCode code)
{
Opm opm;
return _repository.TryRemove(code, out opm);
}
public bool TryGetOpm(EanEicCode code, out Opm opmForCode)
{
return _repository.TryGetValue(code, out opmForCode);
}
public CheckResult Post(EanEicCode code)
{
return(_eanEicCheckService.CheckCode(code));
}
public bool TryGetOpm(EanEicCode code, out Opm opmForCode)
{
return(_repository.TryGetValue(code, out opmForCode));
}
public bool TryRemoveOpm(EanEicCode code)
{
Opm opm;
return(_repository.TryRemove(code, out opm));
}
private OpmVerificationResult VerifyOpm(EanEicCode code)
{
return(Verify(code));
}
/// <summary>
/// TODO SP:
/// 1) this call needs to be parameterized with some token or user identification to limit # of cals per user
/// a. what to do if the EAN/EIC is invalid
/// b. what to do if the user has already queried system too many times
/// 2) create service that will keep track of # calls to the API for a particular user
/// </summary>
/// <param name="codeString"></param>
/// <returns></returns>
public OpmVerificationResult VerifyOpm(string codeString)
{
EanEicCode code = new EanEicCode(codeString);
return(Verify(code));
}
/// <summary>
/// TODO SP:
/// 1) this call needs to be parameterized with some token or user identification to limit # of cals per user
/// a. what to do if the EAN/EIC is invalid
/// b. what to do if the user has already queried system too many times
/// 2) create service that will keep track of # calls to the API for a particular user
/// </summary>
/// <param name="codeString"></param>
/// <returns></returns>
public OpmVerificationResult VerifyOpm(string codeString)
{
EanEicCode code = new EanEicCode(codeString);
return Verify(code);
}
public Opm(EanEicCode code)
{
Code = code;
}
