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child.js
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child.js
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/* @flow */
import { ZalgoPromise } from 'zalgo-promise/src';
import { isSameDomain, getOpener, getFrames, getDomain, getFrameByName, type CrossDomainWindowType } from 'cross-domain-utils/src';
import { weakMapMemoize, noop } from 'belter/src';
import { CONSTANTS } from '../conf';
import { global } from '../global';
import { needsBridge, registerRemoteWindow, rejectRemoteSendMessage, registerRemoteSendMessage, getBridgeName } from './common';
let awaitRemoteBridgeForWindow = weakMapMemoize((win : CrossDomainWindowType) : ZalgoPromise<?CrossDomainWindowType> => {
return ZalgoPromise.try(() => {
for (let frame of getFrames(win)) {
try {
// $FlowFixMe
if (frame && frame !== window && isSameDomain(frame) && frame[CONSTANTS.WINDOW_PROPS.POSTROBOT]) {
return frame;
}
} catch (err) {
continue;
}
}
try {
let frame = getFrameByName(win, getBridgeName(getDomain()));
if (!frame) {
return;
}
// $FlowFixMe
if (isSameDomain(frame) && frame[CONSTANTS.WINDOW_PROPS.POSTROBOT]) {
return frame;
}
return new ZalgoPromise(resolve => {
let interval;
let timeout;
interval = setInterval(() => {
// $FlowFixMe
if (frame && isSameDomain(frame) && frame[CONSTANTS.WINDOW_PROPS.POSTROBOT]) {
clearInterval(interval);
clearTimeout(timeout);
return resolve(frame);
}
}, 100);
timeout = setTimeout(() => {
clearInterval(interval);
return resolve();
}, 2000);
});
} catch (err) {
// pass
}
});
});
export function openTunnelToOpener() : ZalgoPromise<void> {
return ZalgoPromise.try(() => {
const opener = getOpener(window);
if (!opener) {
return;
}
if (!needsBridge({ win: opener })) {
return;
}
registerRemoteWindow(opener);
return awaitRemoteBridgeForWindow(opener).then(bridge => {
if (!bridge) {
return rejectRemoteSendMessage(opener, new Error(`Can not register with opener: no bridge found in opener`));
}
if (!window.name) {
return rejectRemoteSendMessage(opener, new Error(`Can not register with opener: window does not have a name`));
}
return bridge[CONSTANTS.WINDOW_PROPS.POSTROBOT].openTunnelToParent({
name: window.name,
source: window,
canary() {
// pass
},
sendMessage(message) {
try {
noop(window);
} catch (err) {
return;
}
if (!window || window.closed) {
return;
}
try {
global.receiveMessage({
data: message,
origin: this.origin,
source: this.source
});
} catch (err) {
ZalgoPromise.reject(err);
}
}
}).then(({ source, origin, data }) => {
if (source !== opener) {
throw new Error(`Source does not match opener`);
}
registerRemoteSendMessage(source, origin, data.sendMessage);
}).catch(err => {
rejectRemoteSendMessage(opener, err);
throw err;
});
});
});
}