/// <summary>
/// Returns the id for the specified resource type from the provided reference. If the reference doesn't match the provided type null will be returned.
/// </summary>
/// <typeparam name="TResource">Expected resource type the reference represents.</typeparam>
/// <param name="reference">Resource reference to extract the id from.</param>
/// <returns>The id for the specified resource type if it exists, null otherwise.</returns>
public static string GetId <TResource>(this Hl7.Fhir.Model.ResourceReference reference)
{
var referenceType = $"{typeof(TResource).Name}/";
return(reference?.Reference == null || !reference.Reference.StartsWith(referenceType, StringComparison.InvariantCultureIgnoreCase)
? null : reference.Reference.Substring(referenceType.Length));
}
/// <summary>
/// Returns the id for the specified resource type from the provided reference. If the reference doesn't match the provided type null will be returned.
/// </summary>
/// <typeparam name="TResource">Expected resource type the reference represents.</typeparam>
/// <param name="reference">Resource reference to extract the id from.</param>
/// <returns>The id for the specified resource type if it exists, null otherwise.</returns>
public static string GetId <TResource>(this Hl7.Fhir.Model.ResourceReference reference)
{
string id;
var referenceType = $"{typeof(TResource).Name}/";
if (reference?.Reference == null || !reference.Reference.StartsWith(referenceType, StringComparison.InvariantCultureIgnoreCase))
{
return(null);
}
// Reference should be in the form: ResourceType/Identifier
var relativeReferenceIdentifier = reference.Reference.Substring(referenceType.Length);
var matches = _idMatcherRegex.Match(relativeReferenceIdentifier);
if (!matches.Success)
{
return(null);
}
else
{
id = matches?.Groups?[0].Value;
return(id);
}
}
/// <summary>
/// Conditionally add search parameter for the specified value to the parameter collection.
/// </summary>
/// <param name="searchParams">The search parameter collection to modify.</param>
/// <param name="searchParam">Search parameter to add.</param>
/// <param name="resourceRefValue">The resource reference add to the collection. If value is null no search parameter will be added.</param>
/// <param name="searchPrefix">Optional prefix for value matching.</param>
/// <returns>The modified search parameter collection.</returns>
public static Hl7.Fhir.Rest.SearchParams WhenParamValue(this Hl7.Fhir.Rest.SearchParams searchParams, SearchParam searchParam, Hl7.Fhir.Model.ResourceReference resourceRefValue, SearchPrefix searchPrefix = null)
{
return(searchParams.WhenParamValue(searchParam?.ToString(), resourceRefValue, searchPrefix));
}
