/// <summary>
/// Turn a relative reference into an absolute url, based on the fullUrl of the parent resource
/// </summary>
/// <param name="nav"></param>
/// <param name="identity"></param>
/// <returns></returns>
/// <remarks>See https://www.hl7.org/fhir/bundle.html#references for more information</remarks>
public static ResourceIdentity MakeAbsolute(this ScopedNavigator nav, ResourceIdentity identity)
{
if (identity.IsRelativeRestUrl)
{
// Relocate the relative url on the base given in the fullUrl of the entry (if applicable)
var fullUrl = nav.FullUrl();
if (fullUrl != null)
{
var parentIdentity = new ResourceIdentity(fullUrl);
if (parentIdentity.IsAbsoluteRestUrl)
{
identity = identity.WithBase(parentIdentity.BaseUri);
}
else if (parentIdentity.IsUrn)
{
identity = new ResourceIdentity($"{parentIdentity}/{identity.Id}");
}
}
// Return the identity - will remain relative if we did not find a fullUrl
}
return(identity);
}
public IElementNavigator Resolve(IElementNavigator instance, string reference)
{
var identity = new ResourceIdentity(reference);
if (identity.Form == ResourceIdentityForm.RelativeRestUrl)
{
// Relocate the relative url on the base given in the fullUrl of the entry (if applicable)
var fullUrl = ContextFullUrl(instance);
if (fullUrl != null)
{
var parentIdentity = new ResourceIdentity(fullUrl);
if (parentIdentity.BaseUri != null)
{
identity = identity.WithBase(parentIdentity.BaseUri);
}
}
}
IElementNavigator referencedResource = null;
if (identity.Form == ResourceIdentityForm.Local || identity.Form == ResourceIdentityForm.AbsoluteRestUrl || identity.Form == ResourceIdentityForm.Urn)
{
referencedResource = findUri(instance, identity.ToString());
}
return(referencedResource);
}
public void WithBase()
{
var id = new ResourceIdentity("http://localhost/services/fhir/v012/Patient/3");
var id1 = id.WithBase("http://nu.nl/fhir");
Assert.AreEqual("http://nu.nl/fhir/Patient/3", id1.ToString());
var id2 = new ResourceIdentity("Patient/3").WithBase("http://nu.nl/fhir");
Assert.AreEqual("http://nu.nl/fhir/Patient/3", id2.ToString());
var id3 = id2.MakeRelative();
Assert.AreEqual("Patient/3", id3.ToString());
}
