private bool ProcessVariable(VarSpec varSpec, Result result, bool multiVariableExpression = false)
{
var varname = varSpec.VarName.ToString();
result.ParameterNames.Add(varname);
if (!_Parameters.ContainsKey(varname) ||
_Parameters[varname] == null ||
(_Parameters[varname] is IList && ((IList)_Parameters[varname]).Count == 0) ||
(_Parameters[varname] is IDictionary && ((IDictionary)_Parameters[varname]).Count == 0))
{
if (_resolvePartially)
{
if (multiVariableExpression)
{
if (varSpec.First)
{
result.Append("{");
}
result.Append(varSpec.ToString());
}
else
{
result.Append("{");
result.Append(varSpec.ToString());
result.Append("}");
}
return(false);
}
return(false);
}
if (varSpec.First)
{
result.Append(varSpec.OperatorInfo.First);
}
else
{
result.Append(varSpec.OperatorInfo.Seperator);
}
object value = _Parameters[varname];
// Handle Strings
if (value is string)
{
var stringValue = (string)value;
if (varSpec.OperatorInfo.Named)
{
result.AppendName(varname, varSpec.OperatorInfo, string.IsNullOrEmpty(stringValue));
}
result.AppendValue(stringValue, varSpec.PrefixLength, varSpec.OperatorInfo.AllowReserved);
}
else
{
// Handle Lists
var list = value as IList;
if (list == null && value is IEnumerable <string> )
{
list = ((IEnumerable <string>)value).ToList <string>();
}
if (list != null)
{
if (varSpec.OperatorInfo.Named && !varSpec.Explode) // exploding will prefix with list name
{
result.AppendName(varname, varSpec.OperatorInfo, list.Count == 0);
}
result.AppendList(varSpec.OperatorInfo, varSpec.Explode, varname, list);
}
else
{
// Handle associative arrays
var dictionary = value as IDictionary <string, string>;
if (dictionary != null)
{
if (varSpec.OperatorInfo.Named && !varSpec.Explode) // exploding will prefix with list name
{
result.AppendName(varname, varSpec.OperatorInfo, dictionary.Count == 0);
}
result.AppendDictionary(varSpec.OperatorInfo, varSpec.Explode, dictionary);
}
else
{
// If above all fails, convert the object to string using the default object.ToString() implementation
var stringValue = value.ToString();
if (varSpec.OperatorInfo.Named)
{
result.AppendName(varname, varSpec.OperatorInfo, string.IsNullOrEmpty(stringValue));
}
result.AppendValue(stringValue, varSpec.PrefixLength, varSpec.OperatorInfo.AllowReserved);
}
}
}
return(true);
}
private void ProcessExpression(StringBuilder currentExpression, Result result)
{
if (currentExpression.Length == 0)
{
result.ErrorDetected = true;
result.Append("{}");
return;
}
OperatorInfo op = GetOperator(currentExpression[0]);
var firstChar = op.Default ? 0 : 1;
bool multivariableExpression = false;
var varSpec = new VarSpec(op);
for (int i = firstChar; i < currentExpression.Length; i++)
{
char currentChar = currentExpression[i];
switch (currentChar)
{
case '*':
varSpec.Explode = true;
break;
case ':': // Parse Prefix Modifier
var prefixText = new StringBuilder();
currentChar = currentExpression[++i];
while (currentChar >= '0' && currentChar <= '9' && i < currentExpression.Length)
{
prefixText.Append(currentChar);
i++;
if (i < currentExpression.Length)
{
currentChar = currentExpression[i];
}
}
varSpec.PrefixLength = int.Parse(prefixText.ToString());
i--;
break;
case ',':
multivariableExpression = true;
var success = ProcessVariable(varSpec, result, multivariableExpression);
bool isFirst = varSpec.First;
// Reset for new variable
varSpec = new VarSpec(op);
if (success || !isFirst || _resolvePartially)
{
varSpec.First = false;
}
if (!success && _resolvePartially)
{
result.Append(",");
}
break;
default:
if (IsVarNameChar(currentChar))
{
varSpec.VarName.Append(currentChar);
}
else
{
result.ErrorDetected = true;
}
break;
}
}
ProcessVariable(varSpec, result, multivariableExpression);
if (multivariableExpression && _resolvePartially)
{
result.Append("}");
}
}