@albedo-link/intent/src/transport-builder.js

A lightweight browser wrapper for Albedo API that provides a promise-based interface for all supported intents.

import TransportHandler from './transport-handler.js'

/**
 * Create explicit dialog window transport.
 * @param {String} frontendUrl - URL of the Albedo frontend.
 * @return {TransportHandler}
 */
function createDialogTransport(frontendUrl) {
    const url = `${frontendUrl}/confirm`,
        w = 480,
        h = 600,
        // Fixes dual-screen position                         Most browsers      Firefox
        dualScreenLeft = window.screenLeft !== undefined ? window.screenLeft : window.screenX,
        dualScreenTop = window.screenTop !== undefined ? window.screenTop : window.screenY,
        currentWindowWidth = window.innerWidth ? window.innerWidth : document.documentElement.clientWidth ? document.documentElement.clientWidth : screen.width,
        currentWindowHeight = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight ? document.documentElement.clientHeight : screen.height,
        left = ((currentWindowWidth / 2) - (w / 2)) + dualScreenLeft,
        top = ((currentWindowHeight / 2) - (h / 2)) + dualScreenTop

    const dialogWindow = window.open(url, 'auth.albedo.link', `height=${h},width=${w},top=${top},left=${left},menubar=0,toolbar=0,location=0,status=0,personalbar=0,scrollbars=0,dependent=1`)
    return new TransportHandler(dialogWindow, true).onLoaded
}

let sharedIframeTransport = null

/**
 * Create implicit transport based on hidden iframe.
 * @param {String} frontendUrl - URL of the Albedo frontend.
 * @return {TransportHandler}
 */
function createIframeTransport(frontendUrl) {
    //check if already initialized
    if (!sharedIframeTransport) {
        const iframe = document.createElement('iframe')
        iframe.style.border = 'none'
        Object.assign(iframe, {
            width: '0',
            height: '0',
            frameBorder: '0',
            referrerPolicy: 'origin',
            src: `${frontendUrl}`
        })
        document.body.appendChild(iframe)
        sharedIframeTransport = new TransportHandler(iframe.contentWindow)
    }
    return sharedIframeTransport.onLoaded
}

export {createDialogTransport, createIframeTransport}