/// <summary>Adds a code system to 'codeSystem'.</summary>
/// <param name="values"> [in,out] The values.</param>
/// <param name="codeSystem">The code system.</param>
/// <param name="comp"> The component.</param>
private void AddCodeSystem(
ref Dictionary <string, FhirConcept> values,
FhirCodeSystem codeSystem,
FhirValueSetComposition comp)
{
if (comp.Concepts != null)
{
AddConcepts(ref values, comp.Concepts);
return;
}
if (comp.Filters != null)
{
ApplyFilteredConcepts(ref values, codeSystem, comp.Filters, true, false);
return;
}
AddFromNode(
ref values,
codeSystem.RootConcept,
false,
true,
false,
string.Empty,
null,
null,
null);
}
/// <summary>Adds a filtered concepts.</summary>
/// <exception cref="ArgumentNullException">Thrown when one or more required arguments are null.</exception>
/// <param name="values"> [in,out] The values.</param>
/// <param name="codeSystem">The code system.</param>
/// <param name="filters"> Specifies the filters.</param>
/// <param name="include"> True to include, false to exclude.</param>
/// <param name="exclude"> True to exclude, false to include.</param>
private static void ApplyFilteredConcepts(
ref Dictionary <string, FhirConcept> values,
FhirCodeSystem codeSystem,
List <FhirValueSetFilter> filters,
bool include,
bool exclude)
{
if (codeSystem == null)
{
throw new ArgumentNullException(nameof(codeSystem));
}
if ((filters == null) || (filters.Count == 0))
{
throw new ArgumentNullException(nameof(filters));
}
if (include && exclude)
{
#pragma warning disable CA1303 // Do not pass literals as localized parameters
throw new Exception("Cannot include and exclude the same filters!");
#pragma warning restore CA1303 // Do not pass literals as localized parameters
}
if ((!include) && (!exclude))
{
#pragma warning disable CA1303 // Do not pass literals as localized parameters
throw new Exception("Must either include or exclude for filters!");
#pragma warning restore CA1303 // Do not pass literals as localized parameters
}
string startingCode = string.Empty;
bool includeSelf = false;
bool includeChildren = false;
bool includeParents = false;
string exclusionKey = string.Empty;
Regex regex = null;
HashSet <string> inclusionSet = null;
HashSet <string> exclusionSet = null;
int maxRecusrions = -1;
List <KeyValuePair <string, string> > filterProperties = new List <KeyValuePair <string, string> >();
foreach (FhirValueSetFilter filter in filters)
{
string filterKey = $"{filter.Property}:{filter.Operation}";
switch (filterKey)
{
case "concept:=":
startingCode = filter.Value;
includeSelf = true;
includeChildren = false;
includeParents = false;
break;
case "concept:is-a":
startingCode = filter.Value;
includeSelf = true;
includeChildren = true;
includeParents = false;
break;
case "concept:descendent-of":
startingCode = filter.Value;
includeSelf = false;
includeChildren = true;
includeParents = false;
break;
case "concept:is-not-a":
exclusionKey = filter.Value;
break;
case "concept:regex":
regex = new Regex(filter.Value);
break;
case "concept:in":
inclusionSet = new HashSet <string>();
string[] inculsions = filter.Value.Split(',');
foreach (string value in inculsions)
{
inclusionSet.Add(value);
}
break;
case "concept:not-in":
exclusionSet = new HashSet <string>();
string[] exclusions = filter.Value.Split(',');
foreach (string value in exclusions)
{
exclusionSet.Add(value);
}
break;
case "concept:generalizes":
startingCode = filter.Value;
includeSelf = true;
includeChildren = false;
includeParents = true;
break;
case "parent:=":
startingCode = filter.Value;
includeSelf = false;
includeChildren = true;
includeParents = false;
maxRecusrions = 1;
break;
case "child:=":
startingCode = filter.Value;
includeSelf = false;
includeChildren = false;
includeParents = true;
maxRecusrions = 1;
break;
// ignore these
case "acme-plasma:=":
return;
case "concept:exists":
default:
if (filter.Operation == "=")
{
filterProperties.Add(new KeyValuePair <string, string>(filter.Property, filter.Value));
includeSelf = true;
includeChildren = true;
includeParents = false;
continue;
}
throw new NotImplementedException($"Unhandled filter: {filterKey}");
}
}
FhirConceptTreeNode startingNode = codeSystem.RootConcept;
if ((!string.IsNullOrEmpty(startingCode)) &&
codeSystem.ContainsConcept(startingCode))
{
startingNode = codeSystem[startingCode];
}
if (include)
{
AddFromNode(
ref values,
startingNode,
includeSelf,
includeChildren,
includeParents,
exclusionKey,
regex,
inclusionSet,
exclusionSet,
maxRecusrions,
filterProperties);
}
if (exclude)
{
RemoveFromNode(
ref values,
startingNode,
includeSelf,
includeChildren,
includeParents,
exclusionKey,
regex,
inclusionSet,
exclusionSet,
maxRecusrions,
filterProperties);
}
}
