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using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tango.Scripting
{
public class ScriptParser
{
public List<ScriptVariable> ParseScript(String code)
{
List<ScriptVariable> vars = new List<ScriptVariable>();
SyntaxTree tree = CSharpSyntaxTree.ParseText(code);
var root = (CompilationUnitSyntax)tree.GetRoot();
List<VariableDeclaratorSyntax> variables = new List<VariableDeclaratorSyntax>();
FillVariables(variables, root.Members[0]);
variables = variables.Distinct().ToList();
foreach (var item in variables)
{
ScriptVariable v = new ScriptVariable();
v.Name = item.Identifier.ToString();
if (item.Initializer.Value.GetType() == typeof(ObjectCreationExpressionSyntax))
{
v.Type = (item.Initializer.Value as ObjectCreationExpressionSyntax).Type.ToString();
}
else if (item.Initializer.Value.GetType() == typeof(InvocationExpressionSyntax))
{
v.Type = (((item.Initializer.Value as InvocationExpressionSyntax).Expression as MemberAccessExpressionSyntax).Name as GenericNameSyntax).TypeArgumentList.Arguments[0].ToString();
}
vars.Add(v);
}
return vars;
}
private void FillVariables(List<VariableDeclaratorSyntax> variables, SyntaxNode node)
{
foreach (var item in node.DescendantNodes(x => true))
{
if (item.GetType() == typeof(VariableDeclaratorSyntax))
{
variables.Add(item as VariableDeclaratorSyntax);
}
else
{
FillVariables(variables, item);
}
}
}
}
public class ScriptVariable
{
public String Name { get; set; }
public String Type { get; set; }
public override string ToString()
{
return String.Format("{0} : {1}", Type, Name);
}
}
}
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