v2.0
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rlv-dan
246
Snap2HTML/CommandLine.cs
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246
Snap2HTML/CommandLine.cs
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// Source: http://jake.ginnivan.net/c-sharp-argument-parser/ (which is based on http://www.codeproject.com/Articles/3111/C-NET-Command-Line-Arguments-Parser , MIT License)
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/* Examples:
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Argument: –flag
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Usage: args.IsTrue("flag");
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Result: true
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Argument: –arg:MyValue
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//Usage: args.Single("arg");
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Result: MyValue
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Argument: –arg "My Value"
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Usage: args.Single("arg");
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Result: ‘My Value’
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Argument: /arg=Value /arg=Value2
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Usage: args["arg"]
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Result: new string[] {"Value", "Value2"}
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Argument: /arg="Value,Value2"
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Usage: args["arg"]
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Result: new string[] {"Value", "Value2"}
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Collections.ObjectModel;
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using System.Text.RegularExpressions;
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namespace CommandLine.Utility
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{
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/// <summary>
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/// Arguments class
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/// </summary>
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class Arguments
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{
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/// <summary>
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/// Splits the command line. When main(string[] args) is used escaped quotes (ie a path "c:\folder\")
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/// Will consume all the following command line arguments as the one argument.
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/// This function ignores escaped quotes making handling paths much easier.
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/// </summary>
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/// <param name="commandLine">The command line.</param>
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/// <returns></returns>
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public static string[] SplitCommandLine(string commandLine)
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{
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var translatedArguments = new StringBuilder(commandLine);
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var escaped = false;
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for (var i = 0; i < translatedArguments.Length; i++)
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{
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if (translatedArguments[i] == '"')
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{
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escaped = !escaped;
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}
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if (translatedArguments[i] == ' ' && !escaped)
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{
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translatedArguments[i] = '\n';
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}
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}
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var toReturn = translatedArguments.ToString().Split(new[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
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for (var i = 0; i < toReturn.Length; i++)
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{
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toReturn[i] = RemoveMatchingQuotes(toReturn[i]);
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}
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return toReturn;
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}
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public static string RemoveMatchingQuotes(string stringToTrim)
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{
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var firstQuoteIndex = stringToTrim.IndexOf('"');
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var lastQuoteIndex = stringToTrim.LastIndexOf('"');
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while (firstQuoteIndex != lastQuoteIndex)
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{
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stringToTrim = stringToTrim.Remove(firstQuoteIndex, 1);
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stringToTrim = stringToTrim.Remove(lastQuoteIndex - 1, 1); //-1 because we've shifted the indicies left by one
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firstQuoteIndex = stringToTrim.IndexOf('"');
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lastQuoteIndex = stringToTrim.LastIndexOf('"');
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}
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return stringToTrim;
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}
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private readonly Dictionary<string, Collection<string>> _parameters;
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private string _waitingParameter;
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public Arguments(IEnumerable<string> arguments)
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{
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_parameters = new Dictionary<string, Collection<string>>();
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string[] parts;
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//Splits on beginning of arguments ( - and -- and / )
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//And on assignment operators ( = and : )
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var argumentSplitter = new Regex(@"^-{1,2}|^/|=|:",
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RegexOptions.IgnoreCase | RegexOptions.Compiled);
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foreach (var argument in arguments)
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{
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parts = argumentSplitter.Split(argument, 3);
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switch (parts.Length)
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{
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case 1:
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AddValueToWaitingArgument(parts[0]);
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break;
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case 2:
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AddWaitingArgumentAsFlag();
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//Because of the split index 0 will be a empty string
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_waitingParameter = parts[1];
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break;
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case 3:
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AddWaitingArgumentAsFlag();
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//Because of the split index 0 will be a empty string
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string valuesWithoutQuotes = RemoveMatchingQuotes(parts[2]);
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AddListValues(parts[1], valuesWithoutQuotes.Split(','));
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break;
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}
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}
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AddWaitingArgumentAsFlag();
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}
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private void AddListValues(string argument, IEnumerable<string> values)
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{
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foreach (var listValue in values)
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{
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Add(argument, listValue);
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}
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}
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private void AddWaitingArgumentAsFlag()
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{
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if (_waitingParameter == null) return;
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AddSingle(_waitingParameter, "true");
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_waitingParameter = null;
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}
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private void AddValueToWaitingArgument(string value)
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{
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if (_waitingParameter == null) return;
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value = RemoveMatchingQuotes(value);
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Add(_waitingParameter, value);
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_waitingParameter = null;
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}
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/// <summary>
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/// Gets the count.
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/// </summary>
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/// <value>The count.</value>
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public int Count
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{
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get
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{
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return _parameters.Count;
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}
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}
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/// <summary>
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/// Adds the specified argument.
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/// </summary>
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/// <param name="argument">The argument.</param>
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/// <param name="value">The value.</param>
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public void Add(string argument, string value)
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{
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if (!_parameters.ContainsKey(argument))
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_parameters.Add(argument, new Collection<string>());
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_parameters[argument].Add(value);
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}
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public void AddSingle(string argument, string value)
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{
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if (!_parameters.ContainsKey(argument))
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_parameters.Add(argument, new Collection<string>());
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else
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throw new ArgumentException(string.Format("Argument {0} has already been defined", argument));
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_parameters[argument].Add(value);
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}
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public void Remove(string argument)
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{
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if (_parameters.ContainsKey(argument))
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_parameters.Remove(argument);
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}
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/// <summary>
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/// Determines whether the specified argument is true.
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/// </summary>
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/// <param name="argument">The argument.</param>
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/// <returns>
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/// <c>true</c> if the specified argument is true; otherwise, <c>false</c>.
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/// </returns>
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public bool IsTrue(string argument)
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{
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AssertSingle(argument);
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var arg = this[argument];
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return arg != null && arg[0].Equals("true", StringComparison.OrdinalIgnoreCase);
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}
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private void AssertSingle(string argument)
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{
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if (this[argument] != null && this[argument].Count > 1)
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throw new ArgumentException(string.Format("{0} has been specified more than once, expecting single value", argument));
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}
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public string Single(string argument)
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{
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AssertSingle(argument);
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//only return value if its NOT true, there is only a single item for that argument
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//and the argument is defined
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if (this[argument] != null && !IsTrue(argument))
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return this[argument][0];
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return null;
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}
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public bool Exists(string argument)
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{
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return (this[argument] != null && this[argument].Count > 0);
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}
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/// <summary>
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/// Gets the <see cref="System.Collections.ObjectModel.Collection<T>"/> with the specified parameter.
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/// </summary>
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/// <value></value>
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public Collection<string> this[string parameter]
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{
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get
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{
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return _parameters.ContainsKey(parameter) ? _parameters[parameter] : null;
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}
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}
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}
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}
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