public static void CheckExpression(ITypedElement inputNav, Hl7.FhirPath.Expressions.Expression expr, Action <string, bool, string> AppendResults, Action ResetResults)
{
ExpressionElementContext context = new ExpressionElementContext(inputNav.Name);
if (inputNav is dstu2::Hl7.Fhir.ElementModel.IFhirValueProvider pn2)
{
if (pn2.FhirValue is f2.Questionnaire q)
{
context._q2 = q;
}
}
else if (inputNav is stu3::Hl7.Fhir.ElementModel.IFhirValueProvider pn3)
{
if (pn3.FhirValue is f3.Questionnaire q)
{
context._q3 = q;
}
}
else if (inputNav is r4::Hl7.Fhir.ElementModel.IFhirValueProvider pn4)
{
if (pn4.FhirValue is f4.Questionnaire q)
{
context._q4 = q;
}
}
ResetResults();
CheckExpression(expr, "", context, AppendResults);
}
private void ButtonCheckExpression_Click(object sender, RoutedEventArgs e)
{
EvaluationContext evalContext;
var inputNav = GetResourceNavigator(out evalContext);
if (inputNav == null)
{
return;
}
// Don't need to cache this, it is cached in the fhir-client
Hl7.FhirPath.Expressions.Expression expr = null;
try
{
expr = FhirPathProcessor._compiler.Parse(textboxExpression.Text);
}
catch (Exception ex)
{
SetResults("Expression compilation error:\r\n" + ex.Message, true);
return;
}
if (expr != null)
{
try
{
FhirPathProcessor.CheckExpression(inputNav, expr, AppendResults, ResetResults);
}
catch (Exception ex)
{
SetResults("Expression Check error:\r\n" + ex.Message, true);
return;
}
}
}
private void ButtonCheckExpression_Click(object sender, RoutedEventArgs e)
{
var inputNav = GetResourceNavigator();
if (inputNav == null)
{
return;
}
// Don't need to cache this, it is cached in the fhir-client
Hl7.FhirPath.Expressions.Expression expr = null;
try
{
expr = _compiler.Parse(textboxExpression.Text);
}
catch (Exception ex)
{
SetResults("Expression compilation error:\r\n" + ex.Message, true);
return;
}
if (expr != null)
{
try
{
ExpressionElementContext context = new ExpressionElementContext(inputNav.Name);
if (inputNav is dstu2::Hl7.Fhir.ElementModel.PocoNavigator pn2)
{
if (pn2.FhirValue is f2.Questionnaire q)
{
context._q2 = q;
}
}
else if (inputNav is stu3::Hl7.Fhir.ElementModel.PocoNavigator pn3)
{
if (pn3.FhirValue is f3.Questionnaire q)
{
context._q3 = q;
}
}
ResetResults();
CheckExpression(expr, "", context);
}
catch (Exception ex)
{
SetResults("Expression Check error:\r\n" + ex.Message, true);
return;
}
}
}
private void OutputExpression(Hl7.FhirPath.Expressions.Expression expr, StringBuilder sb, string prefix)
{
if (expr is ChildExpression)
{
var func = expr as ChildExpression;
OutputExpression(func.Focus, sb, prefix + "-- ");
sb.AppendFormat("{0}{1}\r\n", prefix, func.ChildName);
return;
}
if (expr is FunctionCallExpression)
{
var func = expr as FunctionCallExpression;
sb.AppendFormat("{0}{1}\r\n", prefix, func.FunctionName);
OutputExpression(func.Focus, sb, prefix + "-- ");
foreach (var item in func.Arguments)
{
OutputExpression(item, sb, prefix + " ");
}
return;
}
//else if (expr is BinaryExpression)
//{
// var func = expr as BinaryExpression;
// sb.AppendLine(func.FunctionName);
// OutputExpression(func.Left, sb);
// sb.AppendLine(func.Op);
// OutputExpression(func.Right, sb);
// return;
//}
else if (expr is ConstantExpression)
{
var func = expr as ConstantExpression;
sb.AppendFormat("{0}{1} (constant)\r\n", prefix, func.Value.ToString());
return;
}
else if (expr is VariableRefExpression)
{
var func = expr as VariableRefExpression;
// sb.AppendFormat("{0}{1} (variable ref)\r\n", prefix, func.Name);
return;
}
sb.Append(expr.GetType().ToString());
}
private static ExpressionElementContext CheckExpression(Hl7.FhirPath.Expressions.Expression expr, string prefix, ExpressionElementContext context, Action <string, bool, string> AppendResults)
{
if (expr is ChildExpression)
{
var func = expr as ChildExpression;
var focusContext = CheckExpression(func.Focus, prefix + "-- ", context, AppendResults);
var childContext = focusContext.Child(func.ChildName);
if (childContext != null)
{
if (focusContext._q4 != null)
{
if (func.ChildName == "item")
{
childContext._4is = new List <f4.Questionnaire.ItemComponent>();
childContext._4is.AddRange(focusContext._q4.Item);
}
}
if (focusContext._q3 != null)
{
if (func.ChildName == "item")
{
childContext._3is = new List <f3.Questionnaire.ItemComponent>();
childContext._3is.AddRange(focusContext._q3.Item);
}
}
if (focusContext._q2 != null)
{
if (func.ChildName == "group")
{
childContext._2gs = new List <f2.Questionnaire.GroupComponent>();
childContext._2gs.Add(focusContext._q2.Group);
}
}
if (focusContext._4is != null)
{
if (func.ChildName == "item")
{
childContext._4is = new List <f4.Questionnaire.ItemComponent>();
foreach (var item in focusContext._4is)
{
if (item.Item != null)
{
childContext._4is.AddRange(item.Item);
}
}
}
}
if (focusContext._3is != null)
{
if (func.ChildName == "item")
{
childContext._3is = new List <f3.Questionnaire.ItemComponent>();
foreach (var item in focusContext._3is)
{
if (item.Item != null)
{
childContext._3is.AddRange(item.Item);
}
}
}
}
if (focusContext._2gs != null)
{
if (func.ChildName == "group")
{
childContext._2gs = new List <f2.Questionnaire.GroupComponent>();
foreach (var item in focusContext._2gs)
{
if (item.Group != null)
{
childContext._2gs.AddRange(item.Group);
}
}
}
else if (func.ChildName == "question")
{
childContext._2qs = new List <f2.Questionnaire.QuestionComponent>();
foreach (var item in focusContext._2gs)
{
if (item.Question != null)
{
childContext._2qs.AddRange(item.Question);
}
}
}
}
if (focusContext._2qs != null)
{
if (func.ChildName == "group")
{
childContext._2gs = new List <f2.Questionnaire.GroupComponent>();
foreach (var item in focusContext._2qs)
{
if (item.Group != null)
{
childContext._2gs.AddRange(item.Group);
}
}
}
}
AppendResults($"{prefix}{func.ChildName}", false, childContext.Tooltip());
return(childContext);
}
else
{
AppendResults($"{prefix}{func.ChildName} *invalid property name*", true, null);
}
return(context);
}
if (expr is FunctionCallExpression)
{
var func = expr as FunctionCallExpression;
var funcs = _compiler.Symbols.Filter(func.FunctionName, func.Arguments.Count() + 1);
if (funcs.Count() == 0 && !(expr is BinaryExpression))
{
AppendResults($"{prefix}{func.FunctionName} *invalid function name*", true, null);
}
else
{
AppendResults($"{prefix}{func.FunctionName}", false, null);
}
var focusContext = CheckExpression(func.Focus, prefix + "-- ", context, AppendResults);
if (func.FunctionName == "binary.as")
{
if (func.Arguments.Count() != 2)
{
AppendResults($"{prefix}{func.FunctionName} INVALID AS Operation", true, null);
return(focusContext);
}
var argContextResult = CheckExpression(func.Arguments.First(), prefix + " ", focusContext, AppendResults);
var typeArg = func.Arguments.Skip(1).FirstOrDefault() as ConstantExpression;
string typeCast = typeArg?.Value as string;
argContextResult.RestrictToType(typeCast);
return(argContextResult);
}
else if (func.FunctionName == "resolve")
{
// need to check what the available outcomes of resolving this are, and switch types to this
}
else
{
// if this is a where operation and the context inside is a linkId = , then check that the linkId is in context
if (func.FunctionName == "where" && func.Arguments.Count() == 1 && (func.Arguments.First() as BinaryExpression)?.Op == "=")
{
var op = func.Arguments.First() as BinaryExpression;
var argContextResult = CheckExpression(op, prefix + " ", focusContext, AppendResults);
// Filter the values that are not in this set
focusContext._4is = argContextResult._4is;
focusContext._3is = argContextResult._3is;
focusContext._2gs = argContextResult._2gs;
focusContext._2qs = argContextResult._2qs;
}
else
{
foreach (var item in func.Arguments)
{
var argContextResult = CheckExpression(item, prefix + " ", focusContext, AppendResults);
}
}
if (func.FunctionName == "binary.=")
{
ChildExpression prop = (ChildExpression)func.Arguments.Where(a => a is ChildExpression).FirstOrDefault();
ConstantExpression value = (ConstantExpression)func.Arguments.Where(a => a is ConstantExpression).FirstOrDefault();
if (prop?.ChildName == "linkId" && value != null)
{
var groupLinkIds = focusContext._2gs?.Select(i => i.LinkId).ToArray();
var questionLinkIds = focusContext._2qs?.Select(i => i.LinkId).ToArray();
var item4Ids = focusContext._4is?.Select(i => i.LinkId).ToArray();
var item3Ids = focusContext._3is?.Select(i => i.LinkId).ToArray();
// filter out all of the other linkIds from the list
focusContext._4is?.RemoveAll(i => i.LinkId != value.Value as string);
focusContext._3is?.RemoveAll(i => i.LinkId != value.Value as string);
focusContext._2gs?.RemoveAll(g => g.LinkId != value.Value as string);
focusContext._2qs?.RemoveAll(q => q.LinkId != value.Value as string);
// Validate that there is an item with this value that is reachable
if (focusContext._2gs?.Count() == 0 || focusContext._2qs?.Count() == 0)
{
// this linkId didn't exist in this context!
string toolTip = "Available LinkIds:";
if (groupLinkIds != null)
{
toolTip += $"\r\nGroup: {String.Join(", ", groupLinkIds)}";
}
if (questionLinkIds != null)
{
toolTip += $"\r\nQuestion: {String.Join(", ", questionLinkIds)}";
}
AppendResults($"{prefix}{func.FunctionName} LinkId is not valid in this context", true, toolTip);
}
if (focusContext._3is?.Count() == 0)
{
// this linkId didn't exist in this context!
string toolTip = "Available LinkIds:";
if (item3Ids != null)
{
toolTip += $"\r\nItems: {String.Join(", ", item3Ids)}";
}
AppendResults($"{prefix}{func.FunctionName} LinkId is not valid in this context", true, toolTip);
}
if (focusContext._4is?.Count() == 0)
{
// this linkId didn't exist in this context!
string toolTip = "Available LinkIds:";
if (item4Ids != null)
{
toolTip += $"\r\nItems: {String.Join(", ", item4Ids)}";
}
AppendResults($"{prefix}{func.FunctionName} LinkId is not valid in this context", true, toolTip);
}
}
}
}
return(focusContext);
}
//else if (expr is BinaryExpression)
//{
// var func = expr as BinaryExpression;
// sb.AppendLine(func.FunctionName);
// CheckExpression(func.Left, sb);
// sb.AppendLine(func.Op);
// CheckExpression(func.Right, sb);
// return;
//}
else if (expr is ConstantExpression)
{
var func = expr as ConstantExpression;
AppendResults($"{prefix}{func.Value.ToString()} (constant)", false, null);
return(null); // context doesn't propogate from this
}
else if (expr is VariableRefExpression)
{
var func = expr as VariableRefExpression;
// sb.AppendFormat("{0}{1} (variable ref)\r\n", prefix, func.Name);
return(context);
}
AppendResults(expr.GetType().ToString(), false, null);
return(context);
}
public static Invokee ToEvaluator(this FP.Expression expr, SymbolTable scope)
{
var compiler = new EvaluatorVisitor();
return(expr.Accept <Invokee>(compiler, scope));
}
