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metamask-extension/app/scripts/lib/auto-reload.js
2017-08-11 15:54:52 -07:00

40 lines
1.2 KiB
JavaScript

module.exports = setupDappAutoReload
function setupDappAutoReload (web3, observable) {
// export web3 as a global, checking for usage
global.web3 = new Proxy(web3, {
get: (_web3, name) => {
// get the time of use
if (name !== '_used') {
console.warn('MetaMask: web3 will be deprecated in the near future in favor of the ethereumProvider \nhttps://github.com/ethereum/mist/releases/tag/v0.9.0')
_web3._used = Date.now()
}
return _web3[name]
},
set: (_web3, name, value) => {
_web3[name] = value
},
})
var networkVersion
observable.subscribe(function (state) {
// get the initial network
const curentNetVersion = state.networkVersion
if (!networkVersion) networkVersion = curentNetVersion
if (curentNetVersion !== networkVersion && web3._used) {
const timeSinceUse = Date.now() - web3._used
// if web3 was recently used then delay the reloading of the page
timeSinceUse > 500 ? triggerReset() : setTimeout(triggerReset, 500)
// prevent reentry into if statement if state updates again before
// reload
networkVersion = curentNetVersion
}
})
}
// reload the page
function triggerReset () {
global.location.reload()
}