/// <summary>
/// returns the parameters of a function
/// </summary>
/// <param name="m">regex math value</param>
/// <returns></returns>
private object[] GetParameters(Match m)
{
string strParams = "";
int nIdx = m.Index + m.Length;
int nDepth = 1;
int nLast = 0;
bool bInQuotes = false;
ArrayList ret = new ArrayList();
//Get the parameter string
while (nDepth > 0)
{
if (nIdx >= Expression.Length)
throw new ArgumentException("Missing ')' in Expression");
if (!bInQuotes && Expression[nIdx] == ')')
nDepth--;
if (!bInQuotes && Expression[nIdx] == '(')
nDepth++;
if (Expression[nIdx] == '"' && (nIdx == 0 || Expression[nIdx-1] != '\\'))
bInQuotes = !bInQuotes;
if (nDepth > 0)
nIdx++;
}
strParams = Expression.Substring(m.Index + m.Length, nIdx - (m.Index + m.Length));
if ("" + strParams == "")
return null;
bInQuotes = false;
for (nIdx = 0; nIdx < strParams.Length; nIdx++)
{
if (!bInQuotes && strParams[nIdx] == ')')
nDepth--;
if (!bInQuotes && strParams[nIdx] == '(')
nDepth++;
if (strParams[nIdx] == '"' && (nIdx == 0 || strParams[nIdx - 1] != '\\'))
bInQuotes = !bInQuotes;
if (!bInQuotes && nDepth == 0 && strParams[nIdx] == ',')
{
ret.Add(strParams.Substring(nLast, nIdx - nLast));
nLast = nIdx+1;
}
}
ret.Add(strParams.Substring(nLast, nIdx - nLast));
for (nIdx = 0; nIdx < ret.Count; nIdx++)
{
ExpressionEval eval = new ExpressionEval(ret[nIdx].ToString());
eval.AdditionalFunctionEventHandler += AdditionalFunctionEventHandler;
eval._variables = this._variables;
ret[nIdx] = eval;
}
return ret.ToArray();
}
private static bool performComparison(string[] values)
{
string comparisonString = "";
string tempVar;
bool errorFlag = false;
for (int i = 0; i < values.Length; i++)
{
//Console.WriteLine(values[i]);
if (values[i].Equals(".lt.")) { values[i] = " < "; }
else if (values[i].Equals(".gt.")) { values[i] = " > "; }
else if (values[i].Equals(".eq.")) { values[i] = " == "; }
else if (values[i].Equals(".le.")) { values[i] = " <= "; }
else if (values[i].Equals(".ge.")) { values[i] = " >= "; }
else if (values[i].Equals(".ne.")) { values[i] = " != "; }
else if (values[i].Equals(".and.")) { values[i] = " && "; }
else if (values[i].Equals(".or.")) { values[i] = " || "; }
else if (values[i].Equals(".not.")) { values[i] = " ! "; }
else if (isVariableName(values[i])) {
if (variables.ContainsKey(values[i])) { variables.TryGetValue(values[i], out tempVar); values[i] = tempVar; }
else { errorFlag = true; }
}
else if (isString(values[i])) { values[i] = values[i].Replace('"', '\''); } //.Trim('\'')
//Console.WriteLine(values[i]);
}
foreach (string s in values) { comparisonString += s; }
//Console.WriteLine(comparisonString);
if (!errorFlag)
{
ExpressionEval expr = new ExpressionEval(comparisonString);
object result = expr.Evaluate();
//Console.WriteLine(result);
return (bool)result;
}
else
{
return false;
}
}
/// <summary>
/// Executes the function based upon the name of the function
/// </summary>
/// <param name="name">name of the function to execute</param>
/// <param name="p">parameter list</param>
/// <returns>returned value of executed function</returns>
//[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
private object ExecuteFunction(string name, object[] p)
{
object[] parameters = null;
if (p != null)
{
parameters = (object[])p.Clone();
for (int x = 0; x < parameters.Length; x++)
if (parameters[x] is IExpression)
parameters[x] = ((IExpression)parameters[x]).Evaluate();
}
switch (name.ToLower(CultureInfo.CurrentCulture))
{
// Math functions
case "sin": return Math.Sin(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "cos": return Math.Cos(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "tan": return Math.Tan(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "sec": return 1 / Math.Cos(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "csc": return 1 / Math.Sin(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "cot": return 1 / Math.Tan(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "asin": return Math.Asin(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "acos": return Math.Acos(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "atan": return Math.Atan(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "sinh": return Math.Sinh(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "cosh": return Math.Cosh(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "tanh": return Math.Tanh(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "abs": return Math.Abs(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "sqrt": return Math.Sqrt(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "ciel": return Math.Ceiling(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "floor": return Math.Floor(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "exp": return Math.Exp(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "log10": return Math.Log10(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "log": return (parameters.Length > 1) ?
Math.Log(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture), Convert.ToDouble(parameters[1], CultureInfo.CurrentCulture)) :
Math.Log(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "max": return Math.Max(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture), Convert.ToDouble(parameters[1], CultureInfo.CurrentCulture));
case "min": return Math.Min(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture), Convert.ToDouble(parameters[1], CultureInfo.CurrentCulture));
case "pow": return Math.Pow(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture), Convert.ToDouble(parameters[1], CultureInfo.CurrentCulture));
case "round": return (parameters.Length > 1) ?
Math.Round(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture), Convert.ToInt32(parameters[1], CultureInfo.CurrentCulture)) :
Math.Round(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
//case "trunc": return Math.Truncate(Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture));
case "e": return Math.E;
case "pi": return Math.PI;
//DateTime functions
case "now": return DateTime.Now;
case "today": return DateTime.Today;
case "mindate": return DateTime.MinValue;
case "maxdate": return DateTime.MaxValue;
case "monthname": return (new DateTime(2000, Convert.ToInt32(parameters[0]), 1)).ToString("MMMM");
case "adddays": return Convert.ToDateTime(parameters[0]).AddDays(Convert.ToInt32(parameters[1]));
case "addmonths": return Convert.ToDateTime(parameters[0]).AddMonths(Convert.ToInt32(parameters[1]));
case "addyears": return Convert.ToDateTime(parameters[0]).AddYears(Convert.ToInt32(parameters[1]));
case "addhours": return Convert.ToDateTime(parameters[0]).AddHours(Convert.ToInt32(parameters[1]));
case "addminutes": return Convert.ToDateTime(parameters[0]).AddMinutes(Convert.ToInt32(parameters[1]));
case "addseconds": return Convert.ToDateTime(parameters[0]).AddSeconds(Convert.ToInt32(parameters[1]));
//Formatting Functions
case "fmtnum": return Convert.ToDouble(parameters[0], CultureInfo.CurrentCulture).ToString("" + parameters[1], CultureInfo.CurrentCulture);
case "fmtdate": return Convert.ToDateTime(parameters[0], CultureInfo.CurrentCulture).ToString("" + parameters[1], CultureInfo.CurrentCulture);
//Numerical Expression Evaluation
case "expr":
{
ExpressionEval eval = new ExpressionEval("" + parameters[0]);
eval.AdditionalFunctionEventHandler += this.AdditionalFunctionEventHandler;
eval._variables = this._variables;
return eval.Evaluate();
}
//Casting Functions
case "cdbl": return Convert.ToDouble (parameters[0], CultureInfo.CurrentCulture);
case "cint": return Convert.ToInt32 (parameters[0], CultureInfo.CurrentCulture);
case "clong": return Convert.ToInt64 (parameters[0], CultureInfo.CurrentCulture);
case "cuint": return Convert.ToUInt32 (parameters[0], CultureInfo.CurrentCulture);
case "culong": return Convert.ToUInt64 (parameters[0], CultureInfo.CurrentCulture);
case "cdatetime": return Convert.ToDateTime(parameters[0], CultureInfo.CurrentCulture);
case "str": return parameters[0].ToString();
//Logical Functions
case "iif": return Iif(parameters);
case "case": return Case(parameters);
//security fucntions
case "currentuserid": return WindowsIdentity.GetCurrent().Name.ToLower() ;
default: return AdditionalFunctionHelper(name, parameters);
}
}
public bool IsScheduling(string cronExpression)
{
string buildExpression = "";
int p = 0;
while (p < cronExpression.Length)
{
char token = cronExpression[p];
if (token == '(' || token == ')' || token == ';' || token == ':')
{
buildExpression += token;
p++;
continue;
}
string currentExpression = token.ToString();
p++;
while (p < cronExpression.Length)
{
token = cronExpression[p];
if (token != '(' && token != ')' && token != ';' && token != ':')
{
currentExpression += token;
p++;
}
else
{
break;
}
}
currentExpression = currentExpression.Trim(new char[] { ' ', '\t' });
if (String.IsNullOrEmpty(currentExpression)) continue;
bool isEntryActive = false;
if (currentExpression.StartsWith("@"))
{
// Check expresion from scheduled item with a given name
var eventItem = Get(currentExpression.Substring(1));
isEntryActive = (eventItem != null && eventItem.IsEnabled && EvaluateCronEntry(eventItem.CronExpression));
}
else
{
isEntryActive = EvaluateCronEntry(currentExpression);
}
buildExpression += (isEntryActive ? "1" : "0");
}
buildExpression = buildExpression.Replace(":", "+");
buildExpression = buildExpression.Replace(";", "*");
bool success = false;
try
{
ExpressionEval eval = new ExpressionEval();
eval.Expression = buildExpression;
success = eval.EvaluateBool();
}
catch (Exception ex)
{
masterControlProgram.HomeGenie.LogBroadcastEvent(
Domains.HomeAutomation_HomeGenie_Scheduler,
cronExpression,
"Scheduler Expression",
Properties.SCHEDULER_ERROR,
JsonConvert.SerializeObject(ex.Message));
}
return success;
}
public bool IsScheduling(DateTime date, string cronExpression)
{
string buildExpression = "";
int p = 0;
while (p < cronExpression.Length)
{
char token = cronExpression[p];
if (token == '(' || token == ')' || token == ';' || token == ':')
{
buildExpression += token;
p++;
continue;
}
string currentExpression = token.ToString();
p++;
while (p < cronExpression.Length)
{
token = cronExpression[p];
if (token != '(' && token != ')' && token != ';' && token != ':')
{
currentExpression += token;
p++;
}
else
{
break;
}
}
currentExpression = currentExpression.Trim(new char[] { ' ', '\t' });
if (String.IsNullOrEmpty(currentExpression)) continue;
bool isEntryActive = false;
if (currentExpression.StartsWith("@"))
{
// Check expresion from scheduled item with a given name
var eventItem = Get(currentExpression.Substring(1));
if (eventItem == null)
{
masterControlProgram.HomeGenie.MigService.RaiseEvent(
this,
Domains.HomeAutomation_HomeGenie,
SourceModule.Scheduler,
cronExpression,
Properties.SchedulerError,
JsonConvert.SerializeObject("Unknown event name '"+currentExpression+"'"));
}
else if (recursionCount >= MAX_EVAL_RECURSION)
{
recursionCount = 0;
masterControlProgram.HomeGenie.MigService.RaiseEvent(
this,
Domains.HomeAutomation_HomeGenie,
SourceModule.Scheduler,
cronExpression,
Properties.SchedulerError,
JsonConvert.SerializeObject("Too much recursion in expression '"+currentExpression+"'"));
eventItem.IsEnabled = false;
}
else
{
recursionCount++;
try
{
isEntryActive = (eventItem.IsEnabled && IsScheduling(date, eventItem.CronExpression));
} catch{ }
recursionCount--;
if (recursionCount < 0)
recursionCount = 0;
}
}
else
{
isEntryActive = EvaluateCronEntry(date, currentExpression);
}
buildExpression += (isEntryActive ? "1" : "0");
}
buildExpression = buildExpression.Replace(":", "+");
buildExpression = buildExpression.Replace(";", "*");
bool success = false;
try
{
ExpressionEval eval = new ExpressionEval();
eval.Expression = buildExpression;
success = eval.EvaluateBool();
}
catch (Exception ex)
{
masterControlProgram.HomeGenie.MigService.RaiseEvent(
this,
Domains.HomeAutomation_HomeGenie, // before v1.1 it was: Domains.HomeAutomation_HomeGenie_Automation,
SourceModule.Scheduler, // before v1.1 it was: cronExpression,
cronExpression, // before v1.1 it was: "Scheduler Expression",
Properties.SchedulerError,
JsonConvert.SerializeObject(ex.Message));
}
return success;
}
/// <summary>
/// Static version of the Expression Evaluator
/// </summary>
/// <param name="expression">expression to be evaluated</param>
/// <param name="handler">attach a custom function handler</param>
/// <returns></returns>
public static object Evaluate(string expression, AdditionalFunctionEventHandler handler)
{
ExpressionEval expr = new ExpressionEval(expression);
expr.AdditionalFunctionEventHandler += handler;
return expr.Evaluate();
}
/// <summary>
/// Static version of the Expression Evaluator
/// </summary>
/// <param name="expression">expression to be evaluated</param>
/// <returns></returns>
public static object Evaluate(string expressionString)
{
ExpressionEval expression = new ExpressionEval(expressionString);
return expression.Evaluate();
}
/// <summary>
/// This will search the expression for the next token (operand, operator, etc)
/// </summary>
/// <param name="nIdx">Start Position of Search</param>
/// <returns>First character index after token.</returns>
//[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
private int NextToken(int nIdx)
{
Match mRet = null;
int nRet = nIdx;
object val = null;
//Check for preceeding white space from last token index
Match m = DefinedRegex.WhiteSpace.Match(Expression, nIdx);
if (m.Success && m.Index == nIdx)
return nIdx + m.Length;
//Check Parenthesis
m = DefinedRegex.Parenthesis.Match(Expression, nIdx);
if (m.Success)
mRet = m;
//Check Function
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.Function.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
mRet = m;
}
//Check Variable
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.Variable.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{ mRet = m; val = new Variable(m.Groups["Variable"].Value, _variables); }
}
//Check Unary Operator
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.UnaryOp.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{ mRet = m; val = new UnaryOp(m.Value); }
}
//Check Hexadecimal
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.Hexadecimal.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{ mRet = m; val = Convert.ToInt32(m.Value, 16); }
}
//Check Boolean
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.Boolean.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{ mRet = m; val = bool.Parse(m.Value); }
}
//Check DateTime
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.DateTime.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{ mRet = m; val = Convert.ToDateTime(m.Groups["DateString"].Value, CultureInfo.CurrentCulture); }
}
//Check Timespan
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.TimeSpan.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{
mRet = m;
val = new TimeSpan(
int.Parse("0" + m.Groups["Days"].Value),
int.Parse(m.Groups["Hours"].Value),
int.Parse(m.Groups["Minutes"].Value),
int.Parse("0" + m.Groups["Seconds"].Value),
int.Parse("0" + m.Groups["Milliseconds"].Value)
);
}
}
//Check Numeric
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.Numeric.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{
while (m.Success && ("" + m.Value == ""))
m = m.NextMatch();
if (m.Success)
{
mRet = m;
val = double.Parse(m.Value, CultureInfo.CurrentCulture);
}
}
}
if (mRet == null || mRet.Index > nIdx)
{
//Check String
m = DefinedRegex.String.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{ mRet = m; val = m.Groups["String"].Value.Replace("\\\"", "\""); }
}
//Check Binary Operator
if (mRet == null || mRet.Index > nIdx)
{
m = DefinedRegex.BinaryOp.Match(Expression, nIdx);
if (m.Success && (mRet == null || m.Index < mRet.Index))
{ mRet = m; val = new BinaryOp(m.Value); }
}
if (mRet == null)
throw new ArgumentException("Invalid expression construction: \"" + Expression + "\".");
if (mRet.Index != nIdx)
{
throw new ArgumentException(
"Invalid token in expression: [" +
Expression.Substring(nIdx, mRet.Index - nIdx).Trim() + "]"
);
}
if (mRet.Value == "(" || mRet.Value.StartsWith("$"))
{
nRet = mRet.Index + mRet.Length;
int nDepth = 1;
bool bInQuotes = false;
while (nDepth > 0)
{
if (nRet >= Expression.Length)
throw new ArgumentException("Missing " + (bInQuotes ? "\"" : ")") + " in Expression");
if (!bInQuotes && Expression[nRet] == ')')
nDepth--;
if (!bInQuotes && Expression[nRet] == '(')
nDepth++;
if (Expression[nRet] == '"' && (nRet == 0 || Expression[nRet - 1] != '\\'))
bInQuotes = !bInQuotes;
nRet++;
}
if (mRet.Value == "(")
{
ExpressionEval expr = new ExpressionEval(
Expression.Substring(mRet.Index + 1, nRet - mRet.Index - 2)
);
if (this.AdditionalFunctionEventHandler != null)
expr.AdditionalFunctionEventHandler += this.AdditionalFunctionEventHandler;
expr._variables = this._variables;
_expressionlist.Add(expr);
}
else
{
FunctionEval func = new FunctionEval(
Expression.Substring(mRet.Index, (nRet) - mRet.Index)
);
if (this.AdditionalFunctionEventHandler != null)
func.AdditionalFunctionEventHandler += this.AdditionalFunctionEventHandler;
func._variables = this._variables;
_expressionlist.Add(func);
}
}
else
{
nRet = mRet.Index + mRet.Length;
_expressionlist.Add(val);
}
return nRet;
}
