/// <summary>
/// Attempts to instatiate an object of type <paramref name="targetType"/> with data from <paramref name="resourceObject"/> using the <paramref name="apiResource"/>.
/// </summary>
/// <param name="resourceObject"></param>
/// <param name="apiResource"></param>
/// <param name="targetType"></param>
/// <returns></returns>
public static object ToObject(this JsonApiResourceObject resourceObject, JsonApiResource apiResource, Type targetType)
{
var result = Activator.CreateInstance(targetType);
// extract id
if (!string.IsNullOrWhiteSpace(resourceObject.Id))
{
var idProp = targetType.GetProperty(apiResource.IdProperty);
if (idProp != null)
{
var idObject = BtbrdCoreIdConverters.ConvertFromString(resourceObject.Id, idProp.PropertyType);
idProp.SetValueFast(result, idObject);
}
}
// TODO: better iterate over attributes and relations defined in the apiresource
// extract attributes
if (resourceObject.Attributes != null)
{
foreach (var attribute in resourceObject.Attributes)
{
var resourceAttribute = apiResource.Attributes.Where(a => a.Name == attribute.Key).FirstOrDefault();
if (resourceAttribute == null)
{
continue;
}
var targetProperty = targetType.GetProperty(resourceAttribute.PropertyName);
if (targetProperty == null)
{
continue;
}
// Not handled: ienumerables of datetime,datetimeoffset and nullables
var underlying = Nullable.GetUnderlyingType(targetProperty.PropertyType) ?? targetProperty.PropertyType;
var value = attribute.Value;
if (value != null)
{
if (underlying == typeof(DateTime))
{
value = DateTime.Parse(value.ToString());
}
else if (underlying == typeof(DateTimeOffset))
{
value = DateTimeOffset.Parse(value.ToString());
}
else if (underlying.IsEnum)
{
value = Enum.ToObject(underlying, Convert.ChangeType(value, Enum.GetUnderlyingType(underlying)));
}
else
{
value = Convert.ChangeType(value, underlying);
}
}
targetProperty.SetValueFast(result, value);
}
}
// extract relationships
if (resourceObject.Relationships != null)
{
foreach (var relationship in resourceObject.Relationships)
{
var relationResource = apiResource.Relationships.Where(r => r.Name == relationship.Key).FirstOrDefault();
if (relationResource == null)
{
continue;
}
if (relationResource.Kind == RelationshipKind.BelongsTo)
{
var relationshipObject = relationship.Value as JsonApiToOneRelationshipObject;
if (!string.IsNullOrWhiteSpace(relationshipObject.Data?.Id))
{
var idProp = targetType.GetProperty(relationResource.IdPropertyName);
if (idProp != null)
{
var idObject = BtbrdCoreIdConverters.ConvertFromString(relationshipObject.Data.Id, idProp.PropertyType);
idProp.SetValueFast(result, idObject);
}
}
}
else
{
var idProp = targetType.GetProperty(relationResource.IdPropertyName)
?? throw new Exception($"{nameof(JsonApiResourceObjectExtensions)}: Could not find relation property {relationResource.IdPropertyName}");
// get type of the id (e.g. long, string, ..)
Type innerType;
if (idProp.PropertyType.IsArray)
{
innerType = idProp.PropertyType.GetElementType();
}
else if (idProp.PropertyType.IsNonStringEnumerable())
#if (NET40)
{ innerType = idProp.PropertyType.GetGenericArguments()[0]; }
#else
{ innerType = idProp.PropertyType.GenericTypeArguments[0]; }
#endif
else
{
throw new Exception($"{nameof(JsonApiResourceObjectExtensions)}: Trying to read the relation, could not find element-type of type {idProp.PropertyType.FullName}.");
}
if (!(relationship.Value is JsonApiToManyRelationshipObject relationshipObject))
{
throw new Exception($"{nameof(JsonApiResourceObjectExtensions)}: Expected a {nameof(JsonApiToManyRelationshipObject)}, found {relationship.Value?.GetType().FullName ?? "null"}");
}
// create List instance
// get the below defined method GetIdCollection for T=innerType
// and executes it.
var instance = (typeof(JsonApiResourceObjectExtensions)
.GetMethod(nameof(GetIdCollection))
?.MakeGenericMethod(innerType) ?? throw new Exception($"{nameof(JsonApiResourceObjectExtensions)}: Method {nameof(GetIdCollection)} not found."))
.Invoke(null, new object[]
{
/* IEnumerable<JsonApiResourceIdentifierObject> ids : */ relationshipObject.Data,
/* bool makeArray : */ idProp.PropertyType.IsArray
});
idProp.SetValueFast(result, instance);
}
public static JsonApiResourceObject GetResource(this JsonApiResourceObjectDictionary resourceDictionary, object id, Type type)
{
return(resourceDictionary.GetResource(BtbrdCoreIdConverters.ConvertToString(id), type.GetJsonApiClassName()));
}
public static string GetIdAsString(this IJsonApiDataModel obj)
{
var info = obj.GetType().GetProperty("Id");
return(BtbrdCoreIdConverters.ConvertToString(info.GetValueFast(obj)));
}
public static void SetIdFromString(this IJsonApiDataModel obj, string stringId)
{
var info = obj.GetType().GetProperty("Id");
info.SetValueFast(obj, BtbrdCoreIdConverters.ConvertFromString(stringId, info.PropertyType));
}
public static JsonApiResourceObject GetResource(this JsonApiResourceObjectDictionary resourceDictionary, object id, JsonApiResource apiResource)
{
return(resourceDictionary.GetResource(BtbrdCoreIdConverters.ConvertToString(id), apiResource.ResourceType));
}
