este-library-oldschool/este/storage/local.js

Library for github.com/steida/este.git

// Generated by github.com/steida/coffee2closure 900.1.18
/**
  @fileoverview Local storage for este.Model's via HTML5 or IE user data.
  @see /demos/storage/local.html
 */
var extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.superClass_ = parent.prototype; return child; },
  hasProp = {}.hasOwnProperty;
goog.provide('este.storage.Local');
goog.require('este.json');
goog.require('goog.result');
goog.require('este.storage.Base');
goog.require('goog.object');
goog.require('goog.storage.mechanism.mechanismfactory');
goog.require('goog.string');
goog.require('goog.uri.utils');

/**
  @param {string} namespace
  @param {string|number=} version
  @param {goog.storage.mechanism.Mechanism=} mechanism
  @param {function():string=} idFactory
  @constructor
  @extends {este.storage.Base}
 */
este.storage.Local = function(namespace, version, mechanism, idFactory) {
  este.storage.Local.superClass_.constructor.call(this, namespace, version);
  this.namespace = goog.uri.utils.appendPath(this.namespace, this.version);
  this.mechanism = mechanism != null ? mechanism : goog.storage.mechanism.mechanismfactory.create(this.namespace);
  this.idFactory = idFactory != null ? idFactory : goog.string.getRandomString;
}
extend(este.storage.Local, superClass);

/**
  @type {goog.storage.mechanism.Mechanism}
  @protected
 */
este.storage.Local.prototype.mechanism = null;

/**
  @type {function():string}
  @protected
 */
este.storage.Local.prototype.idFactory = function() {};

/**
  @override
 */
este.storage.Local.prototype.addInternal = function(model, url) {
  return this.saveInternal(model, url);
};

/**
  @override
 */
este.storage.Local.prototype.loadInternal = function(model, url) {
  var id, json, models;
  id = model.getId();
  models = this.loadModels(url);
  if (!models) {
    return goog.result.failedResult();
  }
  json = models[id];
  if (!json) {
    return goog.result.failedResult();
  }
  model.set(json);
  return goog.result.successfulResult(model);
};

/**
  @override
 */
este.storage.Local.prototype.saveInternal = function(model, url) {
  var id, models, serializedModels;
  this.ensureModelId(model);
  id = model.getId();
  serializedModels = this.mechanism.get(url);
  models = serializedModels ? este.json.parse(serializedModels) : {};
  models[id] = model.toJson(true);
  this.saveModels(models, url);
  return goog.result.successfulResult(model);
};

/**
  @override
 */
este.storage.Local.prototype.removeInternal = function(model, url) {
  var id, models;
  id = model.getId();
  if (id) {
    models = this.loadModels(url);
    if (models && models[id]) {
      delete models[id];
      this.saveModels(models, url);
      return goog.result.successfulResult(model);
    }
  }
  return goog.result.failedResult();
};

/**
  @override
 */
este.storage.Local.prototype.queryInternal = function(collection, url, params) {
  var array, id, model, models;
  models = this.loadModels(url);
  array = (function() {
    var results;
    results = [];
    for (id in models) {
      model = models[id];
      results.push(model);
    }
    return results;
  })();
  collection.reset(array);
  return goog.result.successfulResult(collection);
};

/**
  @param {este.Model} model
  @protected
 */
este.storage.Local.prototype.ensureModelId = function(model) {
  var id;
  id = model.getId();
  if (id) {
    return;
  }
  return model.setId(this.idFactory());
};

/**
  @param {Object.<string, Object>} models
  @param {string} url
  @protected
 */
este.storage.Local.prototype.saveModels = function(models, url) {
  var serializedJson;
  if (goog.object.isEmpty(models)) {
    return this.mechanism.remove(url);
  } else {
    serializedJson = este.json.stringify(models);
    return this.mechanism.set(url, serializedJson);
  }
};

/**
  @param {string} url
  @return {Object.<string, Object>}
  @protected
 */
este.storage.Local.prototype.loadModels = function(url) {
  var serializedJson;
  serializedJson = this.mechanism.get(url);
  if (!serializedJson) {
    return null;
  }
  return este.json.parse(serializedJson);
};