rulestypes.js

if (!ctx.hasProperty('applicable_rules')) { exit; }
// TODO: or if rules numFound == 0?
// TODO: set some context data if no rules data or zero rules?

var applicable_rules_data = ctx.getProperty('applicable_rules_data');

var rules_to_exclude = request.getParam('rules.exclude');

// Arrays of things to put into response (by way of the ctx/context and the post-Solr stage)
var rules_response = {
  "excluded_rules": [],
  "banners": [],
  "redirects": [],
  "applicable_rules": [],
  "applicable_rules_ids": [],
  "applicable_rules_debug": [],
  "rules_errors": []
};

for(var rule_index=0; rule_index < applicable_rules_data.response.docs.size(); rule_index++) {
  var rule_doc = applicable_rules_data.response.docs[rule_index];
  rules_response["applicable_rules_ids"].push(rule_doc.id);
  rules_response["applicable_rules"].push(rule_doc);
  rules_response["applicable_rules_debug"].push(rule_doc.toString());
  var excluded = false;

  if (rules_to_exclude) {
    // TODO: optimize this check, add support for comma-separated values too
    for (var i=0; i < rules_to_exclude.size(); i++) {
      if (rule_doc.id == rules_to_exclude[i]) {
        excluded = true;
        rules_response["excluded_rules"].push(rules_to_exclude[i]);
        break;
      }
    }
  }

  if (!excluded) {
    var rule_type = rule_doc.type;

    switch (rule_type) {
      case 'response_value':   // e.g. key="banner", "redirect"... etc
        if (!rules_response[rule_doc.key]) { rules_response[rule_doc.key] = []; }
        rules_response[rule_doc.key].push(rule_doc.value);
        break;

      case 'boost':
        // boost_param=bq, boost_query=id:2^5
        request.addParam(rule_doc.boost_param, rule_doc.boost_query);
        break;

      case 'block':
        request.addParam("fq", "-{!terms f=id}" + Java.type('java.lang.String').join(',',rule_doc.ids));
        break;

      case 'query_rewrite':
        if (rule_doc.new_q) { request.putSingleParam("q", rule_doc.new_q[0]); }
        break;

      case 'set_params':
        for (var px=0; px < rule_doc.param_keys.size(); px++) {
          switch (rule_doc.param_policies[px]) {
            case 'append':
              request.addParam(rule_doc.param_keys[px], rule_doc.param_values[px]);
              break

            case 'replace':
              request.putSingleParam(rule_doc.param_keys[px], rule_doc.param_values[px]);
              break
          }
        }
        break;

      default:
        rules_response["rules_errors"].push(("Unknown rule type '" + rule_type + "' on rule " + rule_doc.id).toString());
        break;
    }
  }
}

ctx.setProperty("rules_response", rules_response);