/// <summary>
/// Gets the magic-word/variable/function-name/template-name and all params.
/// </summary>
/// <example>
/// "#if:{{{lang|}}}|{{{{{lang}}}}} " should return
/// "#if", {{{lang|}}}, {{{{{lang}}}}}
/// </example>
/// <param name="code">The code to parse.</param>
/// <param name="args">The parameters, if any.</param>
/// <param name="logger">An optional logger. May be null.</param>
/// <returns>The command name.</returns>
public static string GetMagicWordAndParams(string code, out List<KeyValuePair<string, string>> args, ILogger logger)
{
if (string.IsNullOrEmpty(code))
{
args = null;
return null;
}
code = code.Trim(WhiteSpaceChars);
int index = code.IndexOfAny(ParamDelimChars);
if (index < 0)
{
args = null;
return code;
}
List<string> parameters = new List<string>(4);
if (code[index] == ':')
{
// If it's a colon, it's part of the command, include it.
parameters.Add(code.Substring(0, index + 1).Trim(WhiteSpaceChars));
}
else
{
parameters.Add(code.Substring(0, index).Trim(WhiteSpaceChars));
}
// New-Line is considered a parameter, so don't trim.
code = code.Substring(index + 1).Trim(WhiteSpaceChars);
int curParamStart = 0;
while (true)
{
index = FindParam(code, curParamStart);
if (index >= 0)
{
string param = code.Substring(curParamStart, index - curParamStart);
parameters.Add(param.Trim(WhiteSpaceChars));
curParamStart = index + 1;
}
else
{
// Last param.
string param = code.Substring(curParamStart);
parameters.Add(param.Trim(WhiteSpaceChars));
break;
}
}
if (parameters.Count == 0)
{
args = null;
return null;
}
string command = parameters[0];
parameters.RemoveAt(0);
args = new List<KeyValuePair<string, string>>(parameters.Count);
foreach (string parameter in parameters)
{
string name;
string value = parameter.Trim(WhiteSpaceChars);
// If parameter is whitespace.
if (value.Length == 0)
{
args.Add(new KeyValuePair<string, string>(string.Empty, parameter));
continue;
}
// Avoid finding nested magic params.
int indexOfAssignment = StringUtils.UnboundIndexOfAny(parameter, new[] { '{', '|', '=' }, '<', '>');
if (indexOfAssignment >= 0 && parameter[indexOfAssignment] == '=')
{
name = parameter.Substring(0, indexOfAssignment);
name = name.Trim(WhiteSpaceChars);
value = parameter.Substring(indexOfAssignment + 1);
}
else
{
name = null;
value = parameter;
}
value = value.Trim(WhiteSpaceChars);
args.Add(new KeyValuePair<string, string>(name, value));
}
if (logger != null)
{
LogEntry logEntry = logger.CreateEntry(
Levels.Debug, "Parsed Magic:{0}{1}", Environment.NewLine, command);
foreach (KeyValuePair<string, string> pair in args)
{
if (!string.IsNullOrEmpty(pair.Key))
{
logEntry.Properties[pair.Key] = pair.Value;
}
}
logger.Log(logEntry);
}
return command;
}
