internal static IncludePathNode GenerateIncludeTree(JsonApiResource apiResource, string path)
{
if (string.IsNullOrWhiteSpace(path))
{
return(null);
}
var subPaths = path.Split(new[] { '.' }, 2);
var relationshipName = subPaths[0].ToJsonRelationshipName();
var relationshipResource = apiResource.Relationships.FirstOrDefault(x => x.Name == relationshipName);
if (relationshipResource == null)
{
throw new Exception($"Cannot include resource {path}: Path does not exist.");
}
var resultNode = new IncludePathNode
{
PropertyPath = relationshipName,
IncludeApiResourceRelationship = relationshipResource,
Child = subPaths.Length > 1
? GenerateIncludeTree(relationshipResource.RelatedResource, subPaths[1])
: null
};
return(resultNode);
}
private static void ProcessIncludeTree(IJsonApiDocument document, IncludePathNode includePathTree, object data, string baseUrl)
{
var relationship = includePathTree.IncludeApiResourceRelationship;
var dataType = data.GetType();
var propertyInfo = dataType.GetProperty(relationship.PropertyName);
if (propertyInfo == null)
{
throw new Exception($"Property {relationship.PropertyName} does not exist for type {dataType.Name}.");
}
var value = propertyInfo.GetValueFast(data);
if (value == null)
{
return;
}
if (relationship.Kind == RelationshipKind.BelongsTo)
{
var jsonResourceObject = new JsonApiResourceObject();
jsonResourceObject.FromApiResource(value, relationship.RelatedResource, baseUrl);
if (document.Included == null)
{
document.Included = new JsonApi.Dictionaries.JsonApiResourceObjectDictionary();
}
document.Included.AddResource(jsonResourceObject);
if (includePathTree.Child != null)
{
// jump down the rabbit hole
ProcessIncludeTree(document, includePathTree.Child, value, baseUrl);
}
}
else
{
if (value is IEnumerable <object> collection && collection.Any())
{
if (document.Included == null)
{
document.Included = new JsonApi.Dictionaries.JsonApiResourceObjectDictionary();
}
foreach (var item in collection)
{
if (item == null)
{
continue;
}
var jsonResourceObject = new JsonApiResourceObject();
jsonResourceObject.FromApiResource(item, relationship.RelatedResource, baseUrl);
document.Included.AddResource(jsonResourceObject);
if (includePathTree.Child != null)
{
// jump down the rabbit hole
ProcessIncludeTree(document, includePathTree.Child, item, baseUrl);
}
}
}
}
}