public Result <SystemRelation, OperationError> AddUsageRelationTo(
ItSystemUsage toSystemUsage,
Maybe <ItInterface> relationInterface,
string description,
string reference,
Maybe <RelationFrequencyType> targetFrequency,
Maybe <ItContract.ItContract> targetContract)
{
if (toSystemUsage == null)
{
throw new ArgumentNullException(nameof(toSystemUsage));
}
var newRelation = new SystemRelation(this);
var updateRelationResult = UpdateRelation(newRelation, toSystemUsage, description, reference, relationInterface, targetContract, targetFrequency);
if (updateRelationResult.Failed)
{
return(updateRelationResult.Error);
}
UsageRelations.Add(newRelation);
return(newRelation);
}
private Result <SystemRelation, OperationError> UpdateRelation(
SystemRelation relation,
ItSystemUsage toSystemUsage,
string changedDescription,
string changedReference,
Maybe <ItInterface> relationInterface,
Maybe <ItContract.ItContract> toContract,
Maybe <RelationFrequencyType> toFrequency)
{
return(relation
.SetRelationTo(toSystemUsage)
.Bind(_ => _.SetDescription(changedDescription))
.Bind(_ => _.SetRelationInterface(relationInterface))
.Bind(_ => _.SetContract(toContract))
.Bind(_ => _.SetFrequency(toFrequency))
.Bind(_ => _.SetReference(changedReference)));
}