/// <reference path="jquery-1.4.4-vsdoc.js" />
/// <reference path="jquery.validate.unobtrusive.js" />

jQuery.validator.addMethod('requiredif',
    function (value, element, parameters) {
        var id = '#' + parameters['dependentproperty'];

        // get the target value (as a string, 
        // as that's what actual value will be)
        var targetvalue = parameters['targetvalue'];
        targetvalue = 
          (targetvalue == null ? '' : targetvalue).toString();

        // get the actual value of the target control
        // note - this probably needs to cater for more 
        // control types, e.g. radios
        var control = jQuery(id);
        var controltype = control.attr('type');
        var actualvalue =
            controltype === 'checkbox' ?
            control.attr('checked').toString() :
            control.val();

        // if the condition is true, reuse the existing 
        // required field validator functionality
        if (targetvalue === actualvalue)
            return jQuery.validator.methods.required.call(
              this, value, element, parameters);

        return true;
    }
);

jQuery.validator.addMethod('requiredifnot',
    function (value, element, parameters) {
      var id = '#' + parameters['dependentproperty'];

      // get the target value (as a string, 
      // as that's what actual value will be)
      var targetvalue = parameters['targetvalue'];
      targetvalue =
          (targetvalue == null ? '' : targetvalue).toString();

      // get the actual value of the target control
      // note - this probably needs to cater for more 
      // control types, e.g. radios
      var control = jQuery(id);
      var controltype = control.attr('type');
      var actualvalue =
            controltype === 'checkbox' ?
            control.attr('checked').toString() :
            control.val();

      // if the condition is true, reuse the existing 
      // required field validator functionality
      if (targetvalue != actualvalue)
        return jQuery.validator.methods.required.call(
              this, value, element, parameters);

      return true;
    }
);

addAdaptor('requiredif');
addAdaptor('requiredifnot');

function addAdaptor(validator) {
  jQuery.validator.unobtrusive.adapters.add(
    validator, ['dependentproperty', 'targetvalue'],
    function (options) {
      options.rules[validator] = {
        dependentproperty: options.params['dependentproperty'],
        targetvalue: options.params['targetvalue']
      };
      options.messages[validator] = options.message;
  });
}