var _ = require('underscore');

/**
 * Takes any object and make it look like a collection+json object with utility methods.
 */
function fromObject(root) {
  root = root || {};
  var collection = root.collection || {};
  collection.items = collection.items || {};
  collection.links = collection.links || {};
  collection.queries = collection.queries || {};
  collection.templates = collection.templates || {};

  collection.mapItemData = function(f) {
    return _.map(collection.items, function(item) {
//      console.log("item", item);
      var map = _.reduce(item.data, function(map, field) {
//        console.log("field", field);
        map[field.name] = field.value;
        return map;
      }, {});
//      console.log("map", map);
      return f(map);
    });
  };

  return collection;
}
module.exports.fromObject = fromObject;

function fromString(s) {
  var object = {};
  try {
    object = JSON.parse(s);
  }
  catch(ex) {
  }
  return fromObject(object);
}
module.exports.fromString = fromString;