Smakolykytl2Epub/Utils/Json2HTML.cs

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace Smakolykytl2Epub.Utils;

public class Content
{
    public string type { get; set; }
    public List<Mark> marks { get; set; }
    public string text { get; set; }
}

public class Mark
{
    public string type { get; set; }
}

public class TextJson
{
    public string type { get; set; }
    public List<Content?> content { get; set; }
}

public class HtmlConverter
{
    public static string ConvertJsonToHtml(string json)
    {
        var token = JToken.Parse(json);
        return ConvertTokenToHtml(token);
    }

    private static string ConvertTokenToHtml(JToken token)
    {
        var html = "";

        if (token is JArray)
        {
            foreach (var childToken in token.Children()) html += ConvertTokenToHtml(childToken);
        }
        else if (token is JObject)
        {
            var text = JsonConvert.DeserializeObject<TextJson>(token.ToString());
            for (int i = 0; i < text?.content?.Count; i++)
            {
                Content str = text.content[i];
                if (str != null)
                {
                    html += str.text;
                }
                if (str.type == "hardBreak")
                {
                    html += "<br>";
                }
                if (str.type == "paragraph")
                {
                    html += "<p>";
                }
            }
            html += "<br>";
        }
        else
        {
            html += token.ToString();
        }

        return html;
    }
}