json beautifier

JSonPresentationFormatter.cs

// originally from https://dl.dropboxusercontent.com/u/52219470/Source/JSonPresentationFormatter.cs
public class JSonPresentationFormatter
{
   public static string Format(string text)
   {
       if (string.IsNullOrEmpty(text)) return string.Empty;
       text = text.Replace(System.Environment.NewLine, string.Empty).Replace("\t", string.Empty);

       var offset = 0;
       var output = new StringBuilder();
       Action<StringBuilder, int> tabs = (sb, pos) => { for (var i = 0; i < pos; i++) { sb.Append("\t"); } };
       Func<string, int, Nullable<Char>> previousNotEmpty = (s, i) =>
       {
           if (string.IsNullOrEmpty(s) || i <= 0) return null;

           Nullable<Char> prev = null;

           while (i > 0 && prev == null)
           {
               prev = s[i - 1];
               if (prev.ToString() == " ") prev = null;
               i--;
           }

           return prev;
       };
       Func<string, int, Nullable<Char>> nextNotEmpty = (s, i) =>
       {
           if (string.IsNullOrEmpty(s) || i >= (s.Length - 1)) return null;

           Nullable<Char> next = null;
           i++;

           while (i < (s.Length - 1) && next == null)
           {
               next = s[i++];
               if (next.ToString() == " ") next = null;
           }

           return next;
       };

		var inQuote = false;
		var ignoreQuote = false;
		
       for (var i = 0; i < text.Length; i++)
       {
           var chr = text[i];

			if (chr == '"' && !ignoreQuote) inQuote = !inQuote;
			if (chr == '\'' && inQuote) ignoreQuote = !ignoreQuote;
			if (inQuote) {
				output.Append(chr);
			}
           else if (chr.ToString() == "{")
           {
               offset++;
               output.Append(chr);
               output.Append(System.Environment.NewLine);
               tabs(output, offset);
           }
           else if (chr.ToString() == "}")
           {
               offset--;
               output.Append(System.Environment.NewLine);
               tabs(output, offset);
               output.Append(chr);

           }
           else if (chr.ToString() == ",")
           {
               output.Append(chr);
              	output.Append(System.Environment.NewLine);
              	tabs(output, offset);
           }
           else if (chr.ToString() == "[")
           {
               output.Append(chr);

               var next = nextNotEmpty(text, i);

               if (next != null && next.ToString() != "]")
               {
                   offset++;
                   output.Append(System.Environment.NewLine);
                   tabs(output, offset);
               }
           }
           else if (chr.ToString() == "]")
           {
               var prev = previousNotEmpty(text, i);

               if (prev != null && prev.ToString() != "[")
               {
                   offset--;
                   output.Append(System.Environment.NewLine);
                   tabs(output, offset);
               }

               output.Append(chr);
           }
           else
               output.Append(chr);
       }

       return output.ToString().Trim();
   }
}