30 lines
554 B
JavaScript
30 lines
554 B
JavaScript
class Queue {
|
|
constructor() {
|
|
this.running = false;
|
|
this.queue = [];
|
|
}
|
|
|
|
add(fn) {
|
|
this.queue.push(fn);
|
|
if (! this.running) this.next();
|
|
}
|
|
|
|
next() {
|
|
this.running = true;
|
|
|
|
if (this.queue.length === 0) {
|
|
this.running = false;
|
|
return;
|
|
}
|
|
|
|
const fn = this.queue.shift();
|
|
new Promise(resolve => {
|
|
// Either fn() completes or the timeout of 10sec is reached
|
|
Promise.resolve(fn()).then(resolve);
|
|
setTimeout(resolve, 10000);
|
|
}).then(() => this.next());
|
|
}
|
|
}
|
|
|
|
module.exports = Queue;
|