private CommandResult Parse(CommandParsingContext context, string argument)
{
if (IsCommand(context, argument))
{
string commandKey = ExtractCommandKey(context, argument);
object commandValue = ExtractCommandValue(context, argument);
return(new CommandResult(commandKey, commandValue));
}
return(null);
}
/// <summary>
/// Parses the given collection of arguments based on the current parser rule set.
/// </summary>
/// <param name="arguments">A collection of all arguments passed through to the application
/// from the command line.</param>
/// <returns>A collection of commands resulting from the parse operation.</returns>
/// <exception cref="ArgumentNullException">Thrown when the given collection of arguments is null.</exception>
public IEnumerable<CommandResult> Parse(string[] arguments)
{
VerificationProvider.VerifyNotNull(arguments, "arguments");
var context = new CommandParsingContext(RuleSet);
foreach (string argument in arguments)
{
var command = Parse(context, argument);
if (command != null)
{
yield return command;
}
}
}
/// <summary>
/// Parses the given collection of arguments based on the current parser rule set.
/// </summary>
/// <param name="arguments">A collection of all arguments passed through to the application
/// from the command line.</param>
/// <returns>A collection of commands resulting from the parse operation.</returns>
/// <exception cref="ArgumentNullException">Thrown when the given collection of arguments is null.</exception>
public IEnumerable <CommandResult> Parse(string[] arguments)
{
VerificationProvider.VerifyNotNull(arguments, "arguments");
var context = new CommandParsingContext(RuleSet);
foreach (string argument in arguments)
{
var command = Parse(context, argument);
if (command != null)
{
yield return(command);
}
}
}
private string ExtractCommandKey(CommandParsingContext context, string command)
{
var prefixes = context.GetPrefixes();
var separators = context.GetSeparators();
// Trim off any prefix characters from the start of the command and split on the first occurrence of any separator characters
string commandKey = command.TrimStart(prefixes);
int splitIndex = commandKey.IndexOfAny(separators);
if (splitIndex > -1 && splitIndex < commandKey.Length)
{
commandKey = commandKey.Substring(0, splitIndex);
}
return(commandKey);
}
private string ExtractCommandKey(CommandParsingContext context, string command)
{
var prefixes = context.GetPrefixes();
var separators = context.GetSeparators();
// Trim off any prefix characters from the start of the command and split on the first occurrence of any separator characters
string commandKey = command.TrimStart(prefixes);
int splitIndex = commandKey.IndexOfAny(separators);
if (splitIndex > -1 && splitIndex < commandKey.Length)
{
commandKey = commandKey.Substring(0, splitIndex);
}
return commandKey;
}
private object ExtractCommandValue(CommandParsingContext context, string command)
{
var separators = context.GetSeparators();
// Split the command from the first occurrence of any separator characters
int splitIndex = command.IndexOfAny(separators);
if (splitIndex < 0 || splitIndex >= command.Length)
{
return(null);
}
string commandValue = command.Substring(splitIndex + 1);
// Check to see if we have multiple values
if (commandValue.Contains(MultipleValuesSeparators[0]))
{
return(commandValue.Split(MultipleValuesSeparators, StringSplitOptions.RemoveEmptyEntries));
}
// We have only a single value
return(commandValue);
}
private object ExtractCommandValue(CommandParsingContext context, string command)
{
var separators = context.GetSeparators();
// Split the command from the first occurrence of any separator characters
int splitIndex = command.IndexOfAny(separators);
if (splitIndex < 0 || splitIndex >= command.Length)
{
return null;
}
string commandValue = command.Substring(splitIndex + 1);
// Check to see if we have multiple values
if (commandValue.Contains(MultipleValuesSeparators[0]))
{
return commandValue.Split(MultipleValuesSeparators, StringSplitOptions.RemoveEmptyEntries);
}
// We have only a single value
return commandValue;
}
private bool IsCommand(CommandParsingContext context, string argument)
{
var prefixes = context.GetPrefixes();
return(argument.StartsWithAny(prefixes));
}
private bool IsCommand(CommandParsingContext context, string argument)
{
var prefixes = context.GetPrefixes();
return argument.StartsWithAny(prefixes);
}
private CommandResult Parse(CommandParsingContext context, string argument)
{
if (IsCommand(context, argument))
{
string commandKey = ExtractCommandKey(context, argument);
object commandValue = ExtractCommandValue(context, argument);
return new CommandResult(commandKey, commandValue);
}
return null;
}
