108 lines
2.7 KiB
JavaScript
108 lines
2.7 KiB
JavaScript
const extension = require('extensionizer')
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const height = 620
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const width = 360
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class NotificationManager {
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/**
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* A collection of methods for controlling the showing and hiding of the notification popup.
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*
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* @typedef {Object} NotificationManager
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*
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*/
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/**
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* Either brings an existing MetaMask notification window into focus, or creates a new notification window. New
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* notification windows are given a 'popup' type.
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*
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*/
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showPopup () {
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this._getPopup((err, popup) => {
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if (err) throw err
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// Bring focus to chrome popup
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if (popup) {
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// bring focus to existing chrome popup
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extension.windows.update(popup.id, { focused: true })
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} else {
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const cb = (currentPopup) => {
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this._popupId = currentPopup.id
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extension.windows.update(currentPopup.id, { focused: true })
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}
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// create new notification popup
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const creation = extension.windows.create({
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url: 'notification.html',
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type: 'popup',
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width,
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height,
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}, cb)
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creation && creation.then && creation.then(cb)
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}
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})
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}
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/**
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* Closes a MetaMask notification if it window exists.
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*
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*/
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closePopup () {
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// closes notification popup
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this._getPopup((err, popup) => {
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if (err) throw err
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if (!popup) return
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extension.windows.remove(popup.id, console.error)
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})
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}
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/**
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* Checks all open MetaMask windows, and returns the first one it finds that is a notification window (i.e. has the
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* type 'popup')
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*
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* @private
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* @param {Function} cb A node style callback that to whcih the found notification window will be passed.
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*
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*/
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_getPopup (cb) {
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this._getWindows((err, windows) => {
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if (err) throw err
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cb(null, this._getPopupIn(windows))
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})
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}
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/**
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* Returns all open MetaMask windows.
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*
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* @private
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* @param {Function} cb A node style callback that to which the windows will be passed.
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*
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*/
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_getWindows (cb) {
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// Ignore in test environment
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if (!extension.windows) {
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return cb()
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}
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extension.windows.getAll({}, (windows) => {
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cb(null, windows)
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})
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}
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/**
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* Given an array of windows, returns the 'popup' that has been opened by MetaMask, or null if no such window exists.
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*
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* @private
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* @param {array} windows An array of objects containing data about the open MetaMask extension windows.
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*
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*/
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_getPopupIn (windows) {
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return windows ? windows.find((win) => {
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// Returns notification popup
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return (win && win.type === 'popup' && win.id === this._popupId)
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}) : null
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}
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}
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module.exports = NotificationManager
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