public ParseResult Parse(string yaml)
{
_contentNodes = new List <ContentNode>();
try
{
YamlRuleParser parser = new YamlRuleParser(yaml, null);
_model = new Model.Model(parser.Header(), parser.Formulas().ToList(), parser.Tabellen().ToList(), parser.Flow().ToList());
List <string> inclusiveSituations = null;
foreach (var step in _model.Steps)
{
if (step.IsSituational)
{
inclusiveSituations = step.Situation.Split(',')
.Select(x => x.Trim())
.Where(x => !string.IsNullOrWhiteSpace(x))
.ToList();
foreach (var inclusiveSituation in inclusiveSituations)
{
var contentNodeStep = new ContentNode($"{YamlRuleParser.Step}.{step.Name}.{YamlRuleParser.StepSituation}.{inclusiveSituation}")
{
Parameter = new Parameter(step.Name, false, TypeEnum.Step, ref _model)
};
contentNodeStep.Parameter.SemanticKey = contentNodeStep.Name;
contentNodeStep.Situation = inclusiveSituation;
_contentNodes.Add(contentNodeStep);
step.SemanticKey = contentNodeStep.Name;
if (step.Choices != null)
{
foreach (var choice in step.Choices)
{
var contentNode = new ContentNode($"{YamlRuleParser.Step}.{step.Name}.{YamlRuleParser.StepSituation}.{inclusiveSituation}.{YamlRuleParser.StepChoice}.{choice.Situation}")
{
Parameter = new Parameter(choice.Situation, false, TypeEnum.Boolean, ref _model)
};
contentNode.Parameter.SemanticKey = contentNode.Name;
contentNode.Situation = inclusiveSituation;
_contentNodes.Add(contentNode);
}
}
if (!string.IsNullOrEmpty(step.Value))
{
var contentNode = new ContentNode($"{YamlRuleParser.Step}.{step.Name}.{YamlRuleParser.StepSituation}.{inclusiveSituation}.{step.Value}");
contentNode.Parameter = new Parameter(step.Name, null, TypeEnum.Double, ref _model);
contentNode.Parameter.SemanticKey = contentNode.Name;
contentNodeStep.Situation = inclusiveSituation;
_contentNodes.Add(contentNode);
}
ResolveToQuestion(step.Formula, ref _contentNodes, step.Situation, step.Name);
if (step.Break != null && !string.IsNullOrEmpty(step.Break.Expression))
{
ContentNode node = new ContentNode($"{YamlRuleParser.Step}.{step.Name}.{YamlRuleParser.StepSituation}.{inclusiveSituation}.geen_recht")
{
IsBreak = true, IsSituational = step.IsSituational, Situation = inclusiveSituation, Parameter = new Parameter(name: "recht", value: null, type: TypeEnum.Boolean, model: ref _model)
};
step.Break.SemanticKey = node.Name;
node.Parameter.SemanticKey = node.Name;
contentNodeStep.Situation = inclusiveSituation;
_contentNodes.Add(node);
}
}
}
else
{
var contentNodeStep = new ContentNode($"{YamlRuleParser.Step}.{step.Name}")
{
Parameter = new Parameter(step.Name, false, TypeEnum.Step, ref _model)
};
contentNodeStep.Parameter.SemanticKey = contentNodeStep.Name;
_contentNodes.Add(contentNodeStep);
step.SemanticKey = contentNodeStep.Name;
if (step.Choices != null)
{
foreach (var choice in step.Choices)
{
var contentNode = new ContentNode($"{YamlRuleParser.Step}.{step.Name}.{YamlRuleParser.StepChoice}.{choice.Situation}")
{
Parameter = new Parameter(choice.Situation, false, TypeEnum.Boolean, ref _model)
};
contentNode.Parameter.SemanticKey = contentNode.Name;
_contentNodes.Add(contentNode);
}
}
if (!string.IsNullOrEmpty(step.Value))
{
var contentNode = new ContentNode($"{YamlRuleParser.Step}.{step.Name}.{YamlRuleParser.StepValue}.{step.Value}");
contentNode.Parameter = new Parameter(step.Name, null, TypeEnum.Double, ref _model);
contentNode.Parameter.SemanticKey = contentNode.Name;
_contentNodes.Add(contentNode);
}
ResolveToQuestion(step.Formula, ref _contentNodes, step.Situation, step.Name);
if (step.Break != null && !string.IsNullOrEmpty(step.Break.Expression))
{
step.Break.SemanticKey = string.Join('.', new[] { YamlRuleParser.Step, step.Name, "geen_recht" }.Where(s => !string.IsNullOrEmpty(s)));
ContentNode node = new ContentNode(step.Break.SemanticKey)
{
IsBreak = true, IsSituational = step.IsSituational, Situation = step.Situation, Parameter = new Parameter(name: "recht", value: null, type: TypeEnum.Boolean, model: ref _model)
};
node.Parameter.SemanticKey = step.Break.SemanticKey;
_contentNodes.Add(node);
}
}
}
}
catch (Exception ex)
{
var result = new ParseResult
{
IsError = true,
Message = ex.Message
};
return(result);
}
ContentNodes.Add(new ContentNode("end")
{
Parameter = new Parameter("end", null, TypeEnum.Step, ref _model)
});
return(new ParseResult()
{
Message = Ok,
ExpressionTree = new YamlDotNet.Serialization.Serializer().Serialize(_model),
Model = _model
});
}
private static Parameter Evaluate(FormulaExpressionContext caller, ref ExpressionContext context, ref Formula formula, ref ParametersCollection parameters1, QuestionDelegate onQuestion, ref Model.Model model)
{
if (parameters1 is null)
{
throw new ArgumentNullException(nameof(parameters1));
}
IDynamicExpression e = null;
if (!formula.IsSituational)
{
try
{
e = context.CompileDynamic(formula.Functions[0].Expression);
var result = e.Evaluate().Infer();
Parameter parameter;
parameter = new Parameter(formula.Name, result.Infer(), null, ref model);
parameter.IsCalculated = true;
parameters1.Add(parameter);
if (context.Variables.ContainsKey(parameter.Name))
{
context.Variables.Remove(parameter.Name);
}
context.Variables.Add(parameter.Name, parameter.Value.Infer());
return(parameter);
}
catch (ExpressionCompileException)
{
// Function can not evaluate further, before a Question/Answer sequence is fullfilled by the client.
throw new UnresolvedException($"Function {formula.Functions[0].Expression} can not evaluate further, before a Question/Answer sequence is fullfilled by the client.");
}
}
else
{
foreach (var function in formula.Functions)
{
foreach (var item in parameters1)
{
if (item.Name == function.Situation && (bool)item.Value == true)
{
try
{
e = context.CompileDynamic(function.Expression);
var parameter = new Parameter(formula.Name, e.Evaluate().Infer(), null, ref model);
parameter.IsCalculated = true;
parameters1.Add(parameter);
if (context.Variables.ContainsKey(parameter.Name))
{
context.Variables.Remove(parameter.Name);
}
context.Variables.Add(parameter.Name, parameter.Value.Infer());
return(parameter);
}
catch (ExpressionCompileException)
{
// Function can not evaluate further, before a Question/Answer sequence is fullfilled by the client.
throw new UnresolvedException($"Function {function.Expression} can not evaluate further, before a Question/Answer sequence is fullfilled by the client.");
}
}
}
}
StringBuilder situations = new StringBuilder();
var parameters = new ParametersCollection();
foreach (var function in formula.Functions)
{
situations.Append(function.Situation + ",");
var parameter = new Parameter(function.Situation, TypeInference.Infer(function).Type, null, ref model);
parameters.Add(parameter);
}
if (onQuestion == null)
{
throw new Exception($"In order to evaluate variable one of the following situations: {situations.ToString().Trim(',')}, you need to provide a delegate callback to the client for providing an answer");
}
onQuestion(caller, new QuestionArgs("", parameters));
// situation has to be formulated as an input parameter by the client.
throw new UnresolvedException($"Can't evaluate formula {formula.Name} for situation. Please specify one of the following situations: {situations.ToString().Trim(',')}.");
}
}