slingbucks/src/main/resources/SLING-CONTENT/apps/slingbucks/order/price.esp

<%
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
%>
 
<%
// Get the fields node, where prices are defined
var fields = resource.getResourceResolver().resolve("/content/slingbucks/readonly/options/fields");

var FIELDS_PATH = "/content/slingbucks/readonly/options/fields";
var OPT_PREFIX_REGEXP = /^opt_/;

function getPriceProperty(fieldName, value, propertyName) {
  if(fieldName.match(OPT_PREFIX_REGEXP)) {
    fieldName = fieldName.replace(OPT_PREFIX_REGEXP,"");
  } else {
    return null;
  }
  
  // Path of price property P is like
  // FIELDS_PATH + coffeetype/capuccino/priceOffset
  // Get that resource and get our property under it
  var path = FIELDS_PATH + "/" + fieldName + "/" + value;
  var fieldResource = resource.getResourceResolver().resolve(path);
  if(fieldResource) {
    var props = fieldResource.adaptTo(Packages.org.apache.sling.api.resource.ValueMap);
    if(props) {
      var value = props.get(propertyName);
      if(value) {
        return value;
      }
    }
  }
  return null;
}

// Enumerate the properties of the current order node,
// find the price in our fields definition, and
// accumulate if found
var price = 0;

// First using priceOffset, to compute the base price
for(i in currentNode) {
  var prop = currentNode[i];
  var offset = getPriceProperty(i, prop, "priceOffset");
  if(offset) {
    price += offset;
  }
}

// Then using priceFactor and multiply
for(i in currentNode) {
  var prop = currentNode[i];
  var factor = getPriceProperty(i, prop, "priceFactor");
  if(factor) {
    price *= factor;
  }
}

// And round price
price = Math.round(price * 10) / 10;
 
%>
<%= price %>