public string ApplyEmployeeIdentities(string response, IdentityCache identityCache)
{
var xmlResponse = new XmlDocument();
xmlResponse.LoadXml(response);
var validRequestTypes = new List<RequestType> {RequestType.P6, RequestType.P9, RequestType.SL1, RequestType.SL2};
var requestType = requestTypeResolver.GetRequestTypeForResponse(xmlResponse);
if (!validRequestTypes.Contains(requestType))
return response;
switch (requestType)
{
case RequestType.P6:
UpdateIdentities(xmlResponse, "CodingNoticesP6P6B", identityCache);
break;
case RequestType.P9:
UpdateIdentities(xmlResponse, "CodingNoticeP9", identityCache);
break;
case RequestType.SL1:
UpdateIdentities(xmlResponse, "StudentLoanStart", identityCache);
break;
case RequestType.SL2:
UpdateIdentities(xmlResponse, "StudentLoanEnd", identityCache);
break;
}
return GetXmlDocumentAsString(xmlResponse);
}
public HttpResponseMessage GetMessageResponseFor(HttpRequestMessage request, IdentityCache identityCache)
{
var requestContent = request.Content.ReadAsStringAsync().Result;
var configuration = configRepository.GetConfiguration();
var result = messageSender.PostXml(requestContent, configuration.HmrcGetMessagesServer);
var response = result.Response;
if (identityCache != null)
response = dataManipulator.ApplyEmployeeIdentities(response, identityCache);
return new HttpResponseMessage
{
Content = new StringContent(response, Encoding.UTF8)
};
}
private EmployeeIdentity GetNextFreeIdentity(List<EmployeeIdentity> identities, IdentityCache identityCaches)
{
var ids = (from identity in identities
join cachedIdentities in identityCaches.Identities.Values on identity.EmployeePayId equals cachedIdentities.EmployeePayId into iug
from idUsage in iug.DefaultIfEmpty()
select new
{
Identity = identity,
Usages = iug.Count()
}).ToList();
return ids.OrderBy(x => x.Usages).ThenBy(x => x.Identity.EmployeePayId).Select(x => x.Identity).FirstOrDefault();
}
private void UpdateIdentities(XmlDocument xmlResponse, string messageNodeName, IdentityCache identityCache)
{
var identities = repository.Get().ToList();
var nodes = xmlResponse.GetElementsByTagName(messageNodeName);
foreach (XmlNode messageNode in nodes)
{
var messageNino = GetNationalInsuranceNoFromMessage(messageNode);
var cacheIdentity = identityCache.Identities.Where(x => x.Key == messageNino).Select(x => x.Value).FirstOrDefault();
if (cacheIdentity == null)
{
cacheIdentity = GetNextFreeIdentity(identities, identityCache);
if (cacheIdentity == null)
continue;
identityCache.Identities.Add(messageNino, cacheIdentity);
}
ApplyIdentityToMessage(messageNode, cacheIdentity);
}
}