/// <summary>
/// retrieve SNOMED children or parents
/// </summary>
/// <param name="isForChildren">otherwise for parents</param>
/// <param name="searchID">SNOMED ID</param>
/// <param name="pageSize">e.g. 100</param>
/// <param name="maxPages">e.g. 100</param>
/// <param name="snomedConcepts">results</param>
/// <returns></returns>
public string RetrieveChildrenOrParents(string searchID,
bool isForChildren,
int pageSize,
int maxPages,
out List <SnomedConcept> snomedConcepts)
{
///content/{version}/source/{source}/{id}/children
snomedConcepts = new List <SnomedConcept>();
SnomedConcept c = null;
bool isAwaitingName = false;
bool expectMoreOnNextPage = true;
StringBuilder sbResult = new StringBuilder();
string response = null; //for each page
for (int i = 0; i < maxPages; i++)
{
//debug:
//Console.Write(i.ToString() + ";");
expectMoreOnNextPage = false; //unless we reach max for this page below...
string ticket = ObtainSingleUseTicket();
StringBuilder sbUri = new StringBuilder(_baseUriRequests);
sbUri.Append("/content/");
sbUri.Append("current");//unless you want to specify one
sbUri.Append("/source/");
sbUri.Append("SNOMEDCT_US");
sbUri.Append("/");
sbUri.Append(System.Uri.EscapeDataString(searchID));
sbUri.Append(isForChildren ? "/children" : "/parents");
sbUri.Append("?pageSize=");
sbUri.Append(pageSize);
sbUri.Append("&pageNumber=");
sbUri.Append((i + 1).ToString());
//if (!string.IsNullOrEmpty(req.SearchType))
//{
// sbUri.Append("&searchType=");
// sbUri.Append(req.SearchType);
//}
sbUri.Append("&ticket=");
sbUri.Append(ticket);
//trap not found error which happens when results
// count is multiple of pageSize
try
{
response = SendRequest("GET",
null, null, sbUri.ToString());
}
catch (Exception er)
{
if ((i > 0) &&
(er is System.Net.WebException) &&
(er.ToString().Contains("(404)")))
{
//ignore the error, just quit
break;
}
else
{
//rethrow
throw er;
}
}
if (true)
{
sbResult.Append(response);
sbResult.Append(Environment.NewLine);
if (i == maxPages - 1)
{
throw new Exception("Truncated at " +
(i + 1).ToString() +
" pages maximum.");
}
//add to list
using (Newtonsoft.Json.JsonTextReader reader =
new JsonTextReader(new StringReader(response)))
{
StringBuilder sb = new StringBuilder();
int numConceptsFound = 0;
while (reader.Read())
{
sb.Append("depth=");
sb.Append(reader.Depth);
sb.Append("; tokenType=");
sb.Append(reader.TokenType);
sb.Append("; value=");
sb.Append(reader.Value);
sb.Append("\r\n");
if (reader.Depth == 3)
{
if (isAwaitingName)
{
//then if we get the name before we get end of object
// we'll add it to the list
//if end of object..
if (reader.TokenType == JsonToken.EndObject)
{
//oops got to end before found name
//reset
isAwaitingName = false;
c = null;
}
else if ((reader.TokenType == JsonToken.PropertyName) &&
((string)reader.Value == "name"))
{
//read value of name and save to list
if (reader.Read())
{
if (reader.TokenType == JsonToken.String)
{
c.Name = (string)reader.Value;
numConceptsFound++;
if (numConceptsFound >= pageSize)
{
expectMoreOnNextPage = true;
}
snomedConcepts.Add(c);
isAwaitingName = false;
c = null;
}
}
}
}//from if awaing name
else if ((reader.TokenType == JsonToken.PropertyName) &&
((string)reader.Value == "ui"))
{
//read value of ui
if (reader.Read())
{
if (reader.TokenType == JsonToken.String)
{
c = new SnomedConcept();
//hopefully ui is the Snomed Concept ID
c.ConceptID = (string)reader.Value;
isAwaitingName = true;
}
}
}
} //from if depth 3
} //from while reader read
} //from using json reader
} //from if not NORESULTS -> from if true
//notice they don't tell us when end of list, so the
// only way we know is if list is smaller than pageSize
if (!expectMoreOnNextPage)
{
break;
}
}//from for each page
return(sbResult.ToString());
}
/// <summary>
/// returns the raw text of the search and also
/// assigns result to a list of SnomedConcepts
/// </summary>
/// <param name="maxPages">maximum number of pages to return e.g. 100</param>
/// <param name="pageSize">maximum results per page e.g.100</param>
/// <param name="result">a list of snomed concepts</param>
/// <returns></returns>
public string SearchSnomed(string searchString,
int maxPages,
int pageSize,
out List <SnomedConcept> result)
{
List <SnomedConcept> snomedConcepts = new List <SnomedConcept>();
SnomedConcept c = null;
bool isAwaitingName = false;
StringBuilder sbResult = new StringBuilder();
string response; //for each page
int pageCount = 0;
for (int i = 0; i < maxPages; i++)
{
//debug:
//Console.Write(i.ToString() + ";");
string ticket = ObtainSingleUseTicket();
StringBuilder sbUri = new StringBuilder(_baseUriRequests);
sbUri.Append("/search/current?string=");
sbUri.Append(System.Uri.EscapeDataString(searchString));
sbUri.Append("&sabs=");
sbUri.Append("SNOMEDCT_US");
//sbUri.Append("&returnIdType=sourceDescriptor");// don't use - returns nothing
//sbUri.Append("&returnIdType=sourceConcept"); //seems to give the same info
sbUri.Append("&returnIdType=code"); //code returns UMLS CUI or source Ui depending on &sabs
//sbUri.Append("&returnIdType=sourceUi"); //sourceUi returns ui source uses
sbUri.Append("&pageSize=");
sbUri.Append(pageSize);
sbUri.Append("&pageNumber=");
sbUri.Append((i + 1).ToString());
sbUri.Append("&ticket=");
sbUri.Append(ticket);
response = SendRequest("GET",
null, null, sbUri.ToString());
if (JsonPageIsNORESULTS(response))
{
pageCount = i;
break;
}
else
{
sbResult.Append(response);
sbResult.Append(Environment.NewLine);
if (i == maxPages - 1)
{
throw new Exception("Truncated at " +
(i + 1).ToString() +
" pages maximum.");
}
//add to list
using (Newtonsoft.Json.JsonTextReader reader =
new JsonTextReader(new StringReader(response)))
{
while (reader.Read())
{
if (reader.Depth == 4)
{
if (isAwaitingName)
{
//then if we get the name before we get end of object
// we'll add it to the list
//if end of object..
if (reader.TokenType == JsonToken.EndObject)
{
//oops got to end before found name
//reset
isAwaitingName = false;
c = null;
}
else if ((reader.TokenType == JsonToken.PropertyName) &&
((string)reader.Value == "name"))
{
//read value of name and save to list
if (reader.Read())
{
if (reader.TokenType == JsonToken.String)
{
c.Name = (string)reader.Value;
snomedConcepts.Add(c);
isAwaitingName = false;
c = null;
}
}
}
}//from if awaing name
else if ((reader.TokenType == JsonToken.PropertyName) &&
((string)reader.Value == "ui"))
{
//read value of ui
if (reader.Read())
{
if (reader.TokenType == JsonToken.String)
{
c = new SnomedConcept();
// the ui value can be umls Concept Unique Id, or the snomed CID depending on query returnIdType
c.ConceptID = (string)reader.Value;
//c.CUI = (string)reader.Value;
isAwaitingName = true;
}
}
}
} //from if depth 4
} //from while reader read
} //from using json reader
} //from if not NORESULTS
} //from for each page
result = snomedConcepts;
return(sbResult.ToString());
}
