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using System;
using System.Collections;
using System.Collections.Specialized;
using System.Text.RegularExpressions;
namespace IvyBus
{
/// <summary>
/// Description résumée de IvyBinding.
/// </summary>
internal abstract class IvyBindingBase
{
internal ushort key;
internal string expression;
public IvyBindingBase(ushort id, string exp)
{
key = id;
expression = exp;
}
public abstract string[] Match(string message);
}
internal class IvyBindingRegexp : IvyBindingBase
{
internal Regex regexp;
public IvyBindingRegexp(ushort id, string exp)
: base(id, exp)
{
regexp = new Regex(expression,RegexOptions.Compiled|RegexOptions.IgnoreCase);
}
public override string[] Match(string message)
{
string[] args = null;
// use of regexp to extract info
Match result = regexp.Match(message);
if (result.Success)
{
// Start at 1 because group 0 represent entire matching
args = new string[result.Groups.Count-1];
for (int sub = 1; sub < result.Groups.Count; sub++)
{
args[sub-1] = result.Groups[sub].Value;
}
}
return args;
}
}
internal class IvyBindingSimple : IvyBindingBase
{
internal string msgname; // message name
internal string[] msgargs; // list of message args names
static string msgtag; // send message name
static StringDictionary args_values = null; // send message args[name]=value
public IvyBindingSimple(ushort id, string exp)
: base(id, exp)
{
string[] expr = expression.Split( ' ' );
msgname = expr[0];
msgargs = new string[ expr.Length -1 ];
for ( int i = 1; i < expr.Length; i++ )
msgargs[i-1] = expr[i];
}
static public void Prepare( string message )
{
string[] msg = message.Split(' ');
msgtag = msg[0];
args_values = new StringDictionary();
for( int sub=1 ; sub < msg.Length; sub++ )
{
string[] arg = msg[sub].Split('='); // champ = valeur
if ( arg.Length == 2 )
args_values[arg[0]] = arg[1];
else
{
Console.Error.WriteLine("abnormally Formed message expected 'msg champ=valeur champ=valeur....' :" + message);
}
}
}
public override string[] Match(string message)
{
// the message is already parsed by prepare
//
string[] args = null;
if (msgtag == msgname)
{
args = new string[msgargs.Length];
for( int sub= 0; sub < msgargs.Length; sub++)
{
args[sub] = args_values[msgargs[sub]];
}
}
return args;
}
}
}
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