public void AddStatement(string statement)
{
try
{
var statementViewModel = new StatementViewModel <decimal>(statement, _variableGraph, this);
var existing = _statements.FirstOrDefault(s => s.Id.Equals(statementViewModel.Id, StringComparison.OrdinalIgnoreCase));
if (existing != null)
{
_statements.Remove(existing);
}
_statements.Add(statementViewModel);
RefreshAssociatedStatements(statementViewModel);
ClearError();
StatementInput = string.Empty;
}
catch (ParseException)
{
Error = Constants.Text.InvalidStatement;
HasError = true;
}
catch (CyclicVertexException)
{
Error = Constants.Text.CyclicStatement;
HasError = true;
}
}
private void RefreshAssociatedStatements(StatementViewModel <decimal> addedStatement)
{
if (addedStatement?.IsEvaluated == true)
{
foreach (var node in _variableGraph.GetLinkedNodes(addedStatement.Id).ToList())
{
var statement = _statements.FirstOrDefault(s => s.Id.Equals(node, StringComparison.OrdinalIgnoreCase));
statement?.RefreshResult();
RefreshAssociatedStatements(statement);
}
}
}
public bool Equals(StatementViewModel <T> other)
{
return(this.Id?.Equals(other?.Id, StringComparison.InvariantCultureIgnoreCase) == true);
}
