/// <summary>
/// Whether or not a timespan can be created from the number of arguments supplied.
/// </summary>
/// <param name="args"></param>
/// <returns></returns>
public static TimeSpan CreateTimeFrom(object[] args)
{
// Validate
if (!CanCreateTimeFrom(args.Length))
{
throw new ArgumentException("Incorrect number of inputs for creating time");
}
// Convert object into ints
int[] timeArgs = LangTypeHelper.ConvertToInts(args);
int len = args.Length;
// 1. 0 args = new TimeSpan()
if (len == 0)
{
return(new TimeSpan());
}
// 2. 3 args = new TimeSpan(hours, mins, secs)
if (len == 3)
{
return(new TimeSpan(timeArgs[0], timeArgs[1], timeArgs[2]));
}
// 3. 4 args = new TimeSpan(days, hours, mins, secs)
return(new TimeSpan(timeArgs[0], timeArgs[1], timeArgs[2], timeArgs[3]));
}
/// <summary>
/// Evaluates a math expression of 2 time spans.
/// </summary>
/// <param name="node">The AST node the evaluation is a part of.</param>
/// <param name="lhs">The time on the left hand side</param>
/// <param name="rhs">The time on the right hand side</param>
/// <param name="op">The math operator.</param>
/// <returns></returns>
public static LBool CompareDays(AstNode node, LObject lhs, LObject rhs, Operator op)
{
var left = LangTypeHelper.ConverToLangDayOfWeekNumber(lhs);
var right = LangTypeHelper.ConverToLangDayOfWeekNumber(rhs);
var res = CompareNumbers(node, left, right, op);
return(res);
}
public static object CheckConvert(object result)
{
// Finally, convert to fluentscript types.
// Case 1: Aleady an LObject
if (result is LObject)
{
return(result);
}
// Case 2: C# type so wrap inside of fluentscript type.
return(LangTypeHelper.ConvertToLangValue(result));
}
/// <summary>
/// Add 2 unites together.
/// </summary>
/// <param name="u1"></param>
/// <param name="u2"></param>
/// <returns></returns>
public static LUnit AddUnits(LUnit u1, LUnit u2)
{
// Validate
LangTypeHelper.ValidateUnits(u1, u2);
// Now convert the values to their base value.
double totalBase = u1.BaseValue + u2.BaseValue;
var unit = new LUnit(totalBase);
unit.BaseValue = totalBase;
unit.Group = u1.Group;
unit.SubGroup = u1.SubGroup;
// Set the value to the converted relative value
// e.g. if u1.subgroup = feet and u2.subgroup == inches.
// then multiply result.basevalue by the conversion value.
// Now convert the units
return(unit);
}
/// <summary>
/// Converts arguments from one type to another type that is required by the method call.
/// </summary>
/// <param name="args"></param>
/// <param name="method">The method for which the parameters need to be converted</param>
public static object[] ConvertArgs(List <object> args, MethodInfo method)
{
var hostLangArgs = new List <object>();
var parameters = method.GetParameters();
if (parameters.Length == 0)
{
return(hostLangArgs.ToArray());
}
// REQUIREMENT: Number of values must match # of parameters in method.
for (int ndx = 0; ndx < parameters.Length; ndx++)
{
var param = parameters[ndx];
var sourceArg = args[ndx] as LObject;
// CASE 1: Null
if (sourceArg == LObjects.Null)
{
var defaultVal = LangTypeHelper.GetDefaultValue(param.ParameterType);
hostLangArgs.Add(defaultVal);
}
// CASE 2: int, bool, date, time
else if (sourceArg.Type.IsBuiltInType())
{
var convertedVal = sourceArg.GetValue();
convertedVal = ConvertToCorrectHostLangValue(param.ParameterType, convertedVal);
hostLangArgs.Add(convertedVal);
}
// CASE 3: LArrayType
else if (sourceArg.Type == LTypes.Array && param.ParameterType.IsGenericType)
{
var gentype = param.ParameterType.GetGenericTypeDefinition();
if (gentype == typeof(List <>) || gentype == typeof(IList <>))
{
args[ndx] = ConvertToTypedList((List <object>)sourceArg.GetValue(), param.ParameterType);
}
}
}
return(hostLangArgs.ToArray());
}
/// <summary>
/// Converts from c# datatypes to fluentscript datatypes inside
/// </summary>
/// <param name="val"></param>
public static LObject ConvertToLangLiteral(Token token)
{
if (token.Type == TokenTypes.Null)
{
return(LObjects.Null);
}
var type = token.Type;
var kind = token.Kind;
if (type == TokenTypes.LiteralNumber)
{
return(new LNumber(Convert.ToDouble(token.Value)));
}
if (type == TokenTypes.LiteralString)
{
return(new LString(Convert.ToString(token.Value)));
}
if (type == TokenTypes.LiteralDate)
{
return(new LDate(Convert.ToDateTime(token.Value)));
}
if (type == TokenTypes.LiteralTime)
{
return(new LTime((TimeSpan)token.Value));
}
if (type == TokenTypes.LiteralDay)
{
return(new LDayOfWeek((DayOfWeek)token.Value));
}
if (kind == TokenKind.LiteralBool)
{
return(new LBool(Convert.ToBoolean(token.Value)));
}
return(LangTypeHelper.ConvertToLangClass(token.Value));
}
/// <summary>
/// Call a fluent script function from c#.
/// </summary>
/// <param name="context">The context of the call.</param>
/// <param name="expr">The lambda function</param>
/// <param name="convertApplicableTypes">Whether or not to convert applicable c# types to fluentscript types, eg. ints and longs to double, List(object) to LArrayType and Dictionary(string, object) to LMapType</param>
/// <param name="args"></param>
public static object CallFunctionViaCSharpUsingLambda(Context context, FunctionExpr expr, bool convertApplicableTypes, params object[] args)
{
var argsList = args.ToList <object>();
if (convertApplicableTypes)
{
LangTypeHelper.ConvertToLangTypeValues(argsList);
}
var execution = new Execution();
execution.Ctx = context;
if (EvalHelper.Ctx == null)
{
EvalHelper.Ctx = context;
}
var result = FunctionHelper.CallFunctionInScript(context, execution, expr.Meta.Name, expr, null, argsList, false);
return(result);
}
/// <summary>
/// Evaluate the result of indexing an object e.g. users[0] or users["admins"]
/// </summary>
/// <param name="regmethods"></param>
/// <param name="node"></param>
/// <param name="target"></param>
/// <param name="ndxObj"></param>
/// <returns></returns>
public static LObject AccessIndex(RegisteredMethods regmethods, AstNode node, LObject target, LObject ndxObj)
{
object result = LObjects.Null;
// Case 1: Array access users[0];
if (target.Type == LTypes.Array)
{
var ndx = ((LNumber)ndxObj).Value;
var methods = regmethods.Get(LTypes.Array);
// TODO: Make this generic.
var length = Convert.ToInt32(methods.ExecuteMethod(target, "length", null));
if (ndx >= length)
{
throw ExceptionHelper.BuildRunTimeException(node, "Index out of bounds : '" + ndx + "'");
}
result = methods.GetByNumericIndex(target, (int)ndx);
}
// Case 2: Map access. users["kishore"];
else if (target.Type == LTypes.Map)
{
var memberName = ((LString)ndxObj).Value;
var methods = regmethods.Get(LTypes.Map);
if (!methods.HasProperty(target, memberName))
{
throw ExceptionHelper.BuildRunTimeException(node, "Property does not exist : '" + memberName + "'");
}
result = methods.GetByStringMember(target, memberName);
}
// Conver to lang type.
if (result != LObjects.Null && !(result is LObject))
{
result = LangTypeHelper.ConvertToLangValue(result);
}
return((LObject)result);
}
/// <summary>
/// Dynamically invokes a method call.
/// </summary>
/// <param name="ctx">Context of the script</param>
/// <param name="obj">Instance of the object for which the method call is being applied.</param>
/// <param name="datatype">The datatype of the object.</param>
/// <param name="methodInfo">The method to call.</param>
/// <param name="paramListExpressions">List of expressions representing parameters for the method call</param>
/// <param name="paramList">The list of values(evaluated from expressions) to call.</param>
/// <param name="resolveParams">Whether or not to resolve the parameters from expressions to values.</param>
/// <returns></returns>
private static object MethodCall(Context ctx, object obj, Type datatype, MethodInfo methodInfo, List <Expr> paramListExpressions, List <object> paramList, bool resolveParams, IAstVisitor visitor)
{
// 1. Convert language expressions to values.
if (resolveParams)
{
ParamHelper.ResolveParametersForMethodCall(methodInfo, paramListExpressions, paramList, visitor);
}
// 2. Convert internal language types to c# code method types.
var args = LangTypeHelper.ConvertArgs(paramList, methodInfo);
// 3. Handle params object[];
if (methodInfo.GetParameters().Length == 1)
{
if (methodInfo.GetParameters()[0].ParameterType == typeof(object[]))
{
args = new object[] { args }
}
;
}
var result = methodInfo.Invoke(obj, args);
return(result);
}
/// <summary>
/// Converts from c# datatypes to fluentscript datatypes inside
/// </summary>
/// <param name="val"></param>
public static LObject ConvertToLangValue(object val)
{
if (val == null)
{
return(LObjects.Null);
}
var type = val.GetType();
if (type == typeof(int))
{
return(new LNumber(Convert.ToDouble(val)));
}
if (type == typeof(double))
{
return(new LNumber((double)val));
}
if (type == typeof(string))
{
return(new LString((string)val));
}
if (type == typeof(DateTime))
{
return(new LDate((DateTime)val));
}
if (type == typeof(TimeSpan))
{
return(new LTime((TimeSpan)val));
}
if (type == typeof(DayOfWeek))
{
return(new LDayOfWeek((DayOfWeek)val));
}
if (type == typeof(bool))
{
return(new LBool((bool)val));
}
var isGenType = type.IsGenericType;
if (isGenType)
{
var gentype = type.GetGenericTypeDefinition();
if (type == typeof(List <object>) || gentype == typeof(List <>) || gentype == typeof(IList <>))
{
return(new LArray((IList)val));
}
if (type == typeof(Dictionary <string, object>))
{
return(new LMap((Dictionary <string, object>)val));
}
}
// object
return(LangTypeHelper.ConvertToLangClass(val));
}
/// <summary>
/// Converts arguments from one type to another type that is required by the method call.
/// </summary>
/// <param name="args"></param>
/// <param name="method">The method for which the parameters need to be converted</param>
public static object[] ConvertArgs(List <object> args, MethodInfo method)
{
var hostLangArgs = new List <object>();
var parameters = method.GetParameters();
if (parameters.Length == 0)
{
return(hostLangArgs.ToArray());
}
// REQUIREMENT: Number of values must match # of parameters in method.
for (var ndx = 0; ndx < parameters.Length; ndx++)
{
var param = parameters[ndx];
var sourceArg = args[ndx] as LObject;
// CASE 1: Null
if (sourceArg == LObjects.Null)
{
var defaultVal = LangTypeHelper.GetDefaultValue(param.ParameterType);
hostLangArgs.Add(defaultVal);
}
// CASE 2: int, bool, date, time
else if (sourceArg.Type.IsPrimitiveType())
{
var convertedVal = sourceArg.GetValue();
convertedVal = ConvertToCorrectHostLangValue(param.ParameterType, convertedVal);
hostLangArgs.Add(convertedVal);
}
// CASE 3: LArrayType and generic types.
else if (sourceArg.Type == LTypes.Array)
{
// Case 1: Array
if (param.ParameterType.IsArray)
{
if (param.ParameterType == typeof(string[]))
{
var convertedVal = ConvertToHostLangArray(param.ParameterType, (LArray)sourceArg);
hostLangArgs.Add(convertedVal);
}
}
else if (param.ParameterType.IsGenericType)
{
var gentype = param.ParameterType.GetGenericTypeDefinition();
// Case 2: Matching types IList<object>
if (gentype == typeof(IList <object>))
{
var convertedVal = sourceArg.GetValue();
hostLangArgs.Add(convertedVal);
}
// Case 3: Non-matching types List<object> to IList<Person>
else if (gentype == typeof(List <>) || gentype == typeof(IList <>))
{
//args[ndx] = ConvertToTypedList((List<object>) sourceArg.GetValue(), param.ParameterType);
var convertedArr = ConvertToTypedList((List <object>)sourceArg.GetValue(), param.ParameterType);
hostLangArgs.Add(convertedArr);
}
}
}
}
return(hostLangArgs.ToArray());
}