RBS.System.RegisterNamespace("RBS.Text");

var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

RBS.Text.HTMLEncode = function( text )
{
	if ( typeof( text ) != "string" )
		text = text.toString() ;
	text = text.replace(/&/g, "&") ;
	text = text.replace(/"/g, """) ;
	text = text.replace(/</g, "&lt;") ;
	text = text.replace(/>/g, "&gt;") ;
	text = text.replace(/'/g, "&#39;") ;
	return text ;
}


RBS.Text.Hex = function(n, len) 
{
    var out, i;
    out = "";
    for(i = 0; i < len; i++) 
    {
		out = "0123456789ABCDEF".charAt(n & 0xf) + out;
		n >>= 4;
    }
    return out;
}

RBS.Text.UTF16To8 = function(str)
{
    var out, i, len, c;

    out = "";
    len = str.length;
    for(i = 0; i < len; i++) 
    {
		c = str.charCodeAt(i);
		if ((c >= 0x0001) && (c <= 0x007F)) 
		{
			out += str.charAt(i);
		} 
		else if (c > 0x07FF) 
		{
			out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
			out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));
			out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
		} 
		else 
		{
			out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));
			out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
		}
    }
    return out;
}

RBS.Text.Escape = function(str) 
{
    var c, i, out;
    str = RBS.Text.UTF16To8(str);
    out = "";
    for (i = 0; i < str.length; i++) 
    {
		c = str.charAt(i);
		if (c.match(/[^.0-9A-Z_a-z-]/)) 
		{
			c = str.charCodeAt(i);
			if (c < 256)
				out += "%" + RBS.Text.Hex(c, 2);
			else
				out += "%u" + RBS.Text.Hex(c, 4);
		} 
		else
		{
			out += c;
		}
    }
    return out;
}

RBS.Text.Base64Decode = function(input)
{
       var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;

   // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
   input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

   do {
      enc1 = keyStr.indexOf(input.charAt(i++));
      enc2 = keyStr.indexOf(input.charAt(i++));
      enc3 = keyStr.indexOf(input.charAt(i++));
      enc4 = keyStr.indexOf(input.charAt(i++));

      chr1 = (enc1 << 2) | (enc2 >> 4);
      chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
      chr3 = ((enc3 & 3) << 6) | enc4;

      output = output + String.fromCharCode(chr1);

      if (enc3 != 64) {
         output = output + String.fromCharCode(chr2);
      }
      if (enc4 != 64) {
         output = output + String.fromCharCode(chr3);
      }
   } while (i < input.length);

   return output;
}

RBS.Text.Base64Encode = function(input) {
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;

   do {
      chr1 = input.charCodeAt(i++);
      chr2 = input.charCodeAt(i++);
      chr3 = input.charCodeAt(i++);

      enc1 = chr1 >> 2;
      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
      enc4 = chr3 & 63;

      if (isNaN(chr2)) {
         enc3 = enc4 = 64;
      } else if (isNaN(chr3)) {
         enc4 = 64;
      }

      output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) + 
         keyStr.charAt(enc3) + keyStr.charAt(enc4);
   } while (i < input.length);
   
   return output;
}

RBS.Text.GetStringParam = function(stringparams, paramName)
{
    var paramValue;
    var paramNameIndex = stringparams.indexOf("[" + paramName + "]");
    if (paramNameIndex >= 0) {
        var paramValueIndex = stringparams.indexOf("[", paramNameIndex + 1);
        if (paramValueIndex > paramNameIndex) {
            var rightBrace = stringparams.indexOf("]", paramValueIndex);
            var encodedValue = stringparams.substr(paramValueIndex, rightBrace - paramValueIndex);
            paramValue = RBS.Text.Base64Decode(encodedValue);
        }
    }    
    return paramValue;
}