protected override void DoDelete(VisitedPlaceDataObject entity, LambdaExpression securityFilterExpression, IObjectsDataSet context, Dictionary <string, object> parameters)
{
var userUri = DataProviderHelper.GetWebIdRootURL(entity.UserProfileUri);
string visitedPlaceDocumentName = "myvisitedplaces.ttl";
string visitedPlaceDocumentUri = $"{userUri}/public/{visitedPlaceDocumentName}";
StringBuilder sb;
string payload = "";
if (!entity.IsNew)
{
// existing entity => we need to delete existing entry, before inserting modified one
var existingEntity = DoGet(entity, securityFilterExpression, null, context, parameters);
sb = new StringBuilder();
sb.AppendLine($":{entity.Id} ");
sb.AppendLine($" a <http://generativeobjects.com/apps#VisitedPlace> ;");
sb.AppendLine($" <http://schema.org/startDate> \"{existingEntity.Date.ToString("yyyy-MM-dd")}\" ;");
sb.AppendLine($" <http://schema.org/description> \"\"\"{existingEntity.Description}\"\"\" ; ");
sb.AppendLine($" <http://generativeobjects.com/apps#VisitedPlaceType> \"{existingEntity.Typeofplace.ToString()}\" ; ");
if (existingEntity.Typeofplace == PlaceTypesEnum.Country && entity.CountryURI != null)
{
sb.AppendLine($" <http://dbpedia.org/class/yago/WikicatMemberStatesOfTheUnitedNations> <{existingEntity.CountryURI}> . ");
}
else
{
sb.AppendLine($" <http://dbpedia.org/ontology/Place> <{existingEntity.PlaceURI}> . ");
}
payload += $"DELETE DATA {{{sb.ToString()}}} ";
}
var token = DataProviderHelper.GetSolidToken();
var statusPatch = DataProviderHelper.SendPatch(visitedPlaceDocumentUri, payload, token);
if (statusPatch != HttpStatusCode.OK)
{
throw new GOServerException("Failed to delete the visited place information");
}
}
