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inpage provider - autoreload - improve readability

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This commit is contained in:
kumavis 2017-08-23 16:44:57 -07:00
parent 44dc2ba712
commit 4019f318fe
1 changed files with 31 additions and 14 deletions
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45
app/scripts/lib/auto-reload.js
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@ -3,6 +3,10 @@ module.exports = setupDappAutoReload
function setupDappAutoReload (web3, observable) { function setupDappAutoReload (web3, observable) {
// export web3 as a global, checking for usage // export web3 as a global, checking for usage
let hasBeenWarned = false let hasBeenWarned = false
let reloadInProgress = false
let lastTimeUsed
let lastSeenNetwork
global.web3 = new Proxy(web3, { global.web3 = new Proxy(web3, {
get: (_web3, key) => { get: (_web3, key) => {
// show warning once on web3 access // show warning once on web3 access
@ -11,29 +15,42 @@ function setupDappAutoReload (web3, observable) {
hasBeenWarned = true hasBeenWarned = true
} }
// get the time of use // get the time of use
if (key !== '_used') { lastTimeUsed = Date.now()
_web3._used = Date.now() // return value normally
}
return _web3[key] return _web3[key]
}, },
set: (_web3, key, value) => { set: (_web3, key, value) => {
// set value normally
_web3[key] = value _web3[key] = value
}, },
}) })
var networkVersion
observable.subscribe(function (state) { observable.subscribe(function (state) {
// get the initial network // if reload in progress, no need to check reload logic
const curentNetVersion = state.networkVersion if (reloadInProgress) return
if (!networkVersion) networkVersion = curentNetVersion
if (curentNetVersion !== networkVersion && web3._used) { const currentNetwork = state.networkVersion
const timeSinceUse = Date.now() - web3._used
// if web3 was recently used then delay the reloading of the page // set the initial network
timeSinceUse > 500 ? triggerReset() : setTimeout(triggerReset, 500) if (!lastSeenNetwork) {
// prevent reentry into if statement if state updates again before lastSeenNetwork = currentNetwork
// reload return
networkVersion = curentNetVersion }
// skip reload logic if web3 not used
if (!lastTimeUsed) return
// if network did not change, exit
if (currentNetwork === lastSeenNetwork) return
// initiate page reload
reloadInProgress = true
const timeSinceUse = Date.now() - lastTimeUsed
// if web3 was recently used then delay the reloading of the page
if (timeSinceUse > 500) {
triggerReset()
} else {
setTimeout(triggerReset, 500)
} }
}) })
} }