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// @author rubenwardy
// @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
function getJSON(url, method) {
return new Promise(function(resolve, reject) {
fetch(new Request(url, {
method: method || "get",
credentials: "same-origin",
headers: {
"Accept": "application/json",
},
})).then(function(response) {
response.text().then(function(txt) {
resolve(JSON.parse(txt))
}).catch(reject)
}).catch(reject)
})
}
function pollTask(poll_url, disableTimeout) {
return new Promise(function(resolve, reject) {
var tries = 0;
function retry() {
tries++;
if (!disableTimeout && tries > 30) {
reject("timeout")
} else {
const interval = Math.min(tries*100, 1000)
console.log("Polling task in " + interval + "ms")
setTimeout(step, interval)
}
}
function step() {
getJSON(poll_url).then(function(res) {
if (res.status == "SUCCESS") {
console.log("Got result")
resolve(res.result)
} else if (res.status == "FAILURE" || res.status == "REVOKED") {
reject(res.error || "Unknown server error")
} else {
retry()
}
}).catch(retry)
}
retry()
})
}
function performTask(url) {
return new Promise(function(resolve, reject) {
getJSON(url, "post").then(function(startResult) {
console.log(startResult)
if (typeof startResult.poll_url == "string") {
pollTask(startResult.poll_url).then(resolve).catch(reject)
} else {
reject("Start task didn't return string!")
}
}).catch(reject)
})
}
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