private static void FindInputs(Instruction instruction, InstructionInputList inputs, List <Instruction> seen, VariableLocation location)
{
if (instruction == null || seen.Contains(instruction))
{
return;
}
seen.Add(instruction);
var expression = instruction as ExpressionInstruction;
if (expression != null)
{
foreach (var statement in expression.Statements)
{
statement.FindInputs(inputs, location);
}
}
var variableFields = instruction.GetType().GetFields().Where(field => field.FieldType == typeof(VariableReference));
var promptFields = instruction.GetType().GetFields().Where(field => field.FieldType == typeof(PromptString));
var instructionFields = instruction.GetType().GetFields().Where(field => typeof(Instruction).IsAssignableFrom(field.FieldType));
var instructionListFields = instruction.GetType().GetFields().Where(field => field.FieldType.IsGenericType && field.FieldType.GetGenericTypeDefinition() == typeof(List <>) && typeof(Instruction).IsAssignableFrom(field.FieldType.GetGenericArguments()[0]));
foreach (var field in variableFields)
{
var value = field.GetValue(instruction) as VariableReference;
if (value != null && value.Location == location)
{
inputs.Add(value, field);
}
}
foreach (var field in promptFields)
{
var value = field.GetValue(instruction) as PromptString;
if (value != null)
{
foreach (var input in value.Input)
{
if (input != null && input.Location == location)
{
inputs.Add(input, field);
}
}
}
}
foreach (var field in instructionFields)
{
var value = field.GetValue(instruction) as Instruction;
FindInputs(value, inputs, seen, location);
}
foreach (var listField in instructionListFields)
{
var instructions = listField.GetValue(instruction) as IList <Instruction>;
for (var i = 0; i < instructions.Count; i++)
{
var value = instructions[i] as Instruction;
FindInputs(value, inputs, seen, location);
}
}
}
