Wikimedia Bugzilla is closed!

A lot of templates have arguments that are effectively enumeration types. Using the singlechart template from English Wikipedia as an example, the first argument has a limited range of actual values: things like UKrock, UKdance, UKdownload, Billboardhot100, etc. The template is structured as a switch statement that only does anything useful if it recognises the chart name. Otherwise, it just spits out a big red error message. 

It would be good if I could encode that in the template data, something like


    "1": 
     {
      "label": "Chart identifier",
      "description": "Chart name: recognized values are listed at",
      "type": "enum",
      "values":
        {
         "UKrock", "UKdance", "UKdownload", "Billboardhot100"
        }
      "required": true
     }

The template edit should then not allow freeform text entry while entering the template. Instead, it should provide a menu selection that only allows the editor to enter one of the recognized values.