using Microsoft.AspNetCore.Mvc.Rendering;

using Microsoft.AspNetCore.Mvc.ViewFeatures;

using Microsoft.AspNetCore.Razor.TagHelpers;

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namespace TestingSite.TagHelpers;

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[HtmlTargetElement("radio")]

public class RadioTagHelper : TagHelper

{

    private readonly IHtmlGenerator _generator;

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    [HtmlAttributeName("asp-for")]

    public ModelExpression For { get; set; }

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    [HtmlAttributeName("asp-items")]

    public Dictionary<string, string> Items { get; set; }

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    public RadioTagHelper(IHtmlGenerator generator)

    {

        _generator = generator;

    }

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    public override void Process(TagHelperContext context, TagHelperOutput output)

    {

        var radioGroup = new TagBuilder("div");

        radioGroup.AddCssClass("radio-group");

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        foreach (var item in Items)

        {

            var radio = CreateRadioItem(item.Key, item.Value);

            radioGroup.InnerHtml.AppendHtml(radio);

        }

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        output.Content.AppendHtml(radioGroup);

    }

​

    private TagBuilder CreateRadioItem(string value, string text)

    {

        var radioItem = new TagBuilder("div");

        radioItem.AddCssClass("radio-item");

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        var radioInput = new TagBuilder("input");

        radioInput.Attributes.Add("type", "radio");

        radioInput.Attributes.Add("name", For.Name);

        radioInput.Attributes.Add("value", value);

        if (For.Model?.ToString() == value)

        {

            radioInput.Attributes.Add("checked", "checked");

        }

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        var radioLabel = new TagBuilder("label");

        radioLabel.InnerHtml.AppendHtml(radioInput);

        radioLabel.InnerHtml.Append(text);

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        radioItem.InnerHtml.AppendHtml(radioLabel);

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        return radioItem;

    }

}

​