[Simple FormatJson] #json #csharp

SimpleFormatJson.cs

/*
Credit: https://stackoverflow.com/questions/4580397/json-formatter-in-c
*/
public static string FormatJson(string json, string indent = "  ")
{
    var indentation = 0;
    var quoteCount = 0;
    var escapeCount = 0;

    var result =
        from ch in json ?? string.Empty
        let escaped = (ch == '\\' ? escapeCount++ : escapeCount > 0 ? escapeCount-- : escapeCount) > 0
        let quotes = ch == '"' && !escaped ? quoteCount++ : quoteCount
        let unquoted = quotes % 2 == 0
        let colon = ch == ':' && unquoted ? ": " : null
        let nospace = char.IsWhiteSpace(ch) && unquoted ? string.Empty : null
        let lineBreak = ch == ',' && unquoted ? ch + Environment.NewLine + string.Concat(Enumerable.Repeat(indent, indentation)) : null
        let openChar = (ch == '{' || ch == '[') && unquoted ? ch + Environment.NewLine + string.Concat(Enumerable.Repeat(indent, ++indentation)) : ch.ToString()
        let closeChar = (ch == '}' || ch == ']') && unquoted ? Environment.NewLine + string.Concat(Enumerable.Repeat(indent, --indentation)) + ch : ch.ToString()
        select colon ?? nospace ?? lineBreak ?? (
            openChar.Length > 1 ? openChar : closeChar
        );

    return string.Concat(result);
}