/// <summary>
/// Synchronously executes the <see cref="T:Microsoft.AspNetCore.Razor.TagHelpers.TagHelper" /> with the given <paramref name="context" /> and
/// <paramref name="output" />.
/// </summary>
/// <param name="context">Contains information associated with the current HTML tag.</param>
/// <param name="output">A stateful HTML element used to generate an HTML tag.</param>
/// <exception cref="ArgumentNullException">
/// id - You must specify an identifier on the element for the reCaptcha to work.
/// or
/// data-recaptcha-key - You must specify a data-recaptcha-key attribute on the element for the reCaptcha to work.
/// or
/// data-recaptcha-cookie - You must specify a valid boolean (true, false) for the data-recaptcha-cookie attribute on the element.
/// </exception>
public override void Process(TagHelperContext context, TagHelperOutput output)
{
if (!context.AllAttributes.TryGetAttribute("id", out var id))
{
// ReSharper disable once NotResolvedInText
throw new ArgumentNullException("id", "You must specify an identifier on the element for the reCaptcha to work.");
}
if (!context.AllAttributes.TryGetAttribute("data-recaptcha-key", out var publicKey))
{
// ReSharper disable once NotResolvedInText
throw new ArgumentNullException("data-recaptcha-key", "You must specify a data-recaptcha-key attribute on the element for the reCaptcha to work.");
}
context.AllAttributes.TryGetAttribute("data-recaptcha-event", out var @event);
context.AllAttributes.TryGetAttribute("data-recaptcha-before", out var before);
context.AllAttributes.TryGetAttribute("data-recaptcha-cookie", out var useCookie);
var useCookieBool = false;
if (useCookie?.Value != null && !bool.TryParse(useCookie.Value.ToString(), out useCookieBool))
{
// ReSharper disable once NotResolvedInText
throw new ArgumentNullException("data-recaptcha-cookie", "You must specify a valid boolean (true, false) for the data-recaptcha-cookie attribute on the element.");
}
var reCaptchaBuilder = new ReCaptchaBuilder(publicKey.Value.ToString(), id.Value.ToString(), @event?.Value?.ToString(), before?.Value?.ToString(), useCookieBool);
output.PostElement.AppendHtml(reCaptchaBuilder.BuildReCaptchaContainerHtml());
output.PostElement.AppendHtml(reCaptchaBuilder.BuildReCaptchaScript());
}
private static string BuildReCaptchaForElementHtml(string publicKey, string elementId, string @event,
string beforeReCaptcha, bool useCookie)
{
var reCaptchaBuilder = new ReCaptchaBuilder(publicKey, elementId, @event, beforeReCaptcha, useCookie);
var builder = new StringBuilder();
builder.Append(reCaptchaBuilder.BuildReCaptchaContainerHtml());
builder.Append("");
builder.Append(reCaptchaBuilder.BuildReCaptchaScript());
builder.Append("");
return(builder.ToString());
}