Using custom tokens in Sitecore

Question

I need to reach next behavior for sitecore General Link type.

If there is {token} word in a link, in my code it should be replaced with some word. Everewhere. General Links in my project are everywhere, so it would be nice to use something like type constructor or getter just to replace that token.

Can someone advice me how to reach this? Maybe i should use something like pipelines in sitecore.

To explain my needs better, let's imagine i have such link on my site.

And this link is in controller rendering.

The question is How to replace this "{{token}}" with something that i need before it is rendered in partial view.

Actually i need to replace all such tokens in every link on my site.

Answer 1

Create your token replacer processor:

namespace YourNamespace
{
    public class TokenReplacer
    {
        public void Process(RenderFieldArgs args)
        {
            Assert.ArgumentNotNull(args, "args");

            //Filter to execute your replacer only of specific type of field
            if (args.FieldTypeKey.ToLower() != "general link")
            {
                return;
            }
            args.Result.FirstPart = args.Result.FirstPart.Replace("{{token}}", "something");
            return;
        }
    }
}

Register your processor in renderField pipeline:

<configuration xmlns:x="http://www.sitecore.net/xmlconfig/">
  <sitecore>   
    <pipelines>
      <renderField>        
        <processor x:after="*[@type='Sitecore.Pipelines.RenderField.GetFieldValue, Sitecore.Kernel']" type="YourNamespace.TokenReplacer, YourAssembly" />
      </renderField>
    </pipelines>
  </sitecore>
</configuration>

Now, token should be replaced in all links across the website if you render links using Sitecore API(or GlassMapper or Synthesis).

Here you can read more about it: [1], [2]

Answer 2

Finally, i solved it by overwriting standard methods of GlassView class.

    public abstract class View<TModel> : GlassView<TModel> where TModel : class
    {
        public new HtmlString Editable<T>(T model, Expression<Func<T, object>> field, object parameters = null)
        {
            return ProcessLinks(GlassHtml.Editable(model, field, parameters));
        }
            .......
            .......
            .......
            .......

        private HtmlString ProcessLinks(string content)
        {
           //here i can replace tokens
           if (!Sitecore.Context.PageMode.IsExperienceEditor)
           {
            content = TokenReplacer.ReplaceCustomTokens(content);
           }
           return content;
        }
     }

At least, that worked.