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;(function() {
"use strict";
if (
(!BX || !!BX && typeof BX.namespace !== "function") ||
(!!BX && !!BX.LoadExt && !!BX.LoadExt.Extension)
)
{
return;
}
BX.namespace("BX.LoadExt");
var STATE_SCHEDULED = "scheduled";
var STATE_LOADED = "loaded";
var STATE_LOAD = "load";
var STATE_ERROR = "error";
/**
* Reduces inline scripts
*
* @param {Array} accumulator
* @param {Object} item
* @return {Array.<String>}
*/
function inlineScriptsReducer(accumulator, item)
{
return (item.isInternal && accumulator.push(item.JS)), accumulator;
}
/**
* Reduces external scripts
*
* @param {Array} accumulator
* @param {Object} item
* @return {Array.<String>}
*/
function externalScriptsReducer(accumulator, item)
{
return (!item.isInternal && accumulator.push(item.JS)), accumulator;
}
/**
* Prepares result
*
* @param {String} html
* @return {{SCRIPT: Object[], STYLE: String[]}}
*/
function prepareResult(html)
{
return BX.type.isString(html) ? BX.processHTML(html) : {SCRIPT: [], STYLE: []};
}
/**
* Makes iterable
*
* @param {String|String[]} value
* @return {String[]}
*/
function makeIterable(value)
{
if (BX.type.isArray(value))
{
return value;
}
if (BX.type.isString(value))
{
return [value];
}
return [];
}
/**
* Loads all items
*
* @param {String[]|String} items
* @return {Promise}
*/
function loadAll(items)
{
items = makeIterable(items);
if (!items.length)
{
return Promise.resolve();
}
return new Promise(function(resolve) {
BX.load(items, resolve);
}.bind(this))
}
/**
* Implements interface for works with extension
*
* @param {Object} data
* @return {TypeError}
* @constructor
*/
BX.LoadExt.Extension = function(data)
{
if (!BX.type.isPlainObject(data))
{
return new TypeError("data is not object");
}
this.name = data.extension;
this.state = data.html ? STATE_SCHEDULED : STATE_ERROR;
var result = prepareResult(data.html);
this.inlineScripts = result.SCRIPT.reduce(inlineScriptsReducer, []);
this.externalScripts = result.SCRIPT.reduce(externalScriptsReducer, []);
this.externalStyles = result.STYLE;
};
BX.LoadExt.Extension.prototype = {
/**
* Loads extension assets
*
* @return {Promise<BX.LoadExt.Extension>}
*/
load: function()
{
if (this.state === STATE_ERROR)
{
this.loadPromise = this.loadPromise || Promise.resolve(this);
console.warn("Extension", this.name, "not found");
}
if (!this.loadPromise && this.state)
{
this.state = STATE_LOAD;
this.inlineScripts.forEach(BX.evalGlobal);
this.loadPromise = Promise
.all([
loadAll(this.externalScripts),
loadAll(this.externalStyles)
])
.then(function() {
this.state = STATE_LOADED;
return this;
}.bind(this));
}
return this.loadPromise;
}
}
})();