48 lines
1.4 KiB
C#
48 lines
1.4 KiB
C#
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using Microsoft.AspNetCore.Mvc.Rendering;
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using Microsoft.AspNetCore.Mvc.ViewFeatures;
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using Microsoft.AspNetCore.Razor.TagHelpers;
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using Microsoft.Extensions.Options;
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namespace TurnstileTag;
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[HtmlTargetElement("cf-turnstile-script", TagStructure = TagStructure.NormalOrSelfClosing)]
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public class TurnstileScriptTagHelper : TagHelper
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{
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/// <summary>
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/// Force rendering of script tag.
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/// Otherwise it is only rendered when a turnstile input was rendered.
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/// </summary>
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public bool Force { get; set; }
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readonly IOptions<TurnstileOptions> _options;
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/// <summary>
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/// Gets the <see cref="Rendering.ViewContext"/> of the executing view.
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/// </summary>
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[HtmlAttributeNotBound]
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[ViewContext]
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public ViewContext? ViewContext { get; set; }
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public TurnstileScriptTagHelper(IOptions<TurnstileOptions> options)
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{
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_options = options;
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}
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public override void Process(TagHelperContext context, TagHelperOutput output)
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{
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if (Force || (ViewContext != null && ViewContext.ViewData.ContainsKey("turnstile")))
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{
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output.TagMode = TagMode.StartTagAndEndTag;
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output.TagName = "script";
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output.Attributes.Add(new TagHelperAttribute("async"));
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output.Attributes.Add(new TagHelperAttribute("defer"));
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output.Attributes.Add("src", _options.Value.ApiUrl + "/api.js");
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}
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else
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{
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output.SuppressOutput();
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}
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}
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}
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