'use strict';
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var urlUtils = require('./utils/url')
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, eventUtils = require('./utils/event')
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, FacadeJS = require('./facade')
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, InfoIframeReceiver = require('./info-iframe-receiver')
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, iframeUtils = require('./utils/iframe')
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, loc = require('./location')
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;
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var debug = function() {};
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if (process.env.NODE_ENV !== 'production') {
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debug = require('debug')('sockjs-client:iframe-bootstrap');
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}
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module.exports = function(SockJS, availableTransports) {
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var transportMap = {};
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availableTransports.forEach(function(at) {
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if (at.facadeTransport) {
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transportMap[at.facadeTransport.transportName] = at.facadeTransport;
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}
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});
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// hard-coded for the info iframe
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// TODO see if we can make this more dynamic
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transportMap[InfoIframeReceiver.transportName] = InfoIframeReceiver;
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var parentOrigin;
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/* eslint-disable camelcase */
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SockJS.bootstrap_iframe = function() {
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/* eslint-enable camelcase */
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var facade;
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iframeUtils.currentWindowId = loc.hash.slice(1);
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var onMessage = function(e) {
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if (e.source !== parent) {
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return;
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}
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if (typeof parentOrigin === 'undefined') {
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parentOrigin = e.origin;
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}
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if (e.origin !== parentOrigin) {
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return;
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}
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var iframeMessage;
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try {
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iframeMessage = JSON.parse(e.data);
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} catch (ignored) {
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debug('bad json', e.data);
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return;
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}
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if (iframeMessage.windowId !== iframeUtils.currentWindowId) {
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return;
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}
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switch (iframeMessage.type) {
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case 's':
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var p;
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try {
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p = JSON.parse(iframeMessage.data);
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} catch (ignored) {
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debug('bad json', iframeMessage.data);
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break;
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}
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var version = p[0];
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var transport = p[1];
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var transUrl = p[2];
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var baseUrl = p[3];
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debug(version, transport, transUrl, baseUrl);
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// change this to semver logic
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if (version !== SockJS.version) {
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throw new Error('Incompatible SockJS! Main site uses:' +
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' "' + version + '", the iframe:' +
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' "' + SockJS.version + '".');
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}
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if (!urlUtils.isOriginEqual(transUrl, loc.href) ||
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!urlUtils.isOriginEqual(baseUrl, loc.href)) {
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throw new Error('Can\'t connect to different domain from within an ' +
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'iframe. (' + loc.href + ', ' + transUrl + ', ' + baseUrl + ')');
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}
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facade = new FacadeJS(new transportMap[transport](transUrl, baseUrl));
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break;
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case 'm':
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facade._send(iframeMessage.data);
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break;
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case 'c':
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if (facade) {
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facade._close();
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}
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facade = null;
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break;
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}
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};
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eventUtils.attachEvent('message', onMessage);
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// Start
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iframeUtils.postMessage('s');
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};
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};
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