content.js

/*jslint eqeq: true, forin: true, nomen: true*/
/*jshint unused:false, loopfunc:true */
/*global _, MAPJS, observable*/
MAPJS.content = function (contentAggregate, sessionKey) {
  'use strict';
  var cachedId,
      invalidateIdCache = function () {
        cachedId = undefined;
      },
      maxId = function maxId(idea) {
        idea = idea || contentAggregate;
        if (!idea.ideas) {
          return parseInt(idea.id, 10) || 0;
        }
        return _.reduce(
            idea.ideas,
            function (result, subidea) {
              return Math.max(result, maxId(subidea));
            },
            parseInt(idea.id, 10) || 0
        );
      },
      nextId = function nextId(originSession) {
        originSession = originSession || sessionKey;
        if (!cachedId) {
          cachedId = maxId();
        }
        cachedId += 1;
        if (originSession) {
          return cachedId + '.' + originSession;
        }
        return cachedId;
      },
      init = function (contentIdea, originSession) {
        if (!contentIdea.id) {
          contentIdea.id = nextId(originSession);
        } else {
          invalidateIdCache();
        }
        if (contentIdea.ideas) {
          _.each(contentIdea.ideas, function (value, key) {
            contentIdea.ideas[parseFloat(key)] = init(value, originSession);
          });
        }
        if (!contentIdea.title) {
          contentIdea.title = '';
        }
        contentIdea.containsDirectChild = contentIdea.findChildRankById = function (childIdeaId) {
          return parseFloat(
              _.reduce(
                  contentIdea.ideas,
                  function (res, value, key) {
                    return value.id == childIdeaId ? key : res;
                  },
                  undefined
              )
          );
        };
        contentIdea.findSubIdeaById = function (childIdeaId) {
          var myChild = _.find(contentIdea.ideas, function (idea) {
            return idea.id == childIdeaId;
          });
          return myChild || _.reduce(contentIdea.ideas, function (result, idea) {
                return result || idea.findSubIdeaById(childIdeaId);
              }, undefined);
        };
        contentIdea.find = function (predicate) {
          var current = predicate(contentIdea) ? [_.pick(contentIdea, 'id', 'title')] : [];
          if (_.size(contentIdea.ideas) === 0) {
            return current;