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class Queue {
static queue = []
static pendingPromise = false
static stop = false
static enqueue(promise) {
return new Promise((resolve, reject) => {
this.queue.push({
promise,
resolve,
reject
})
this.dequeue()
})
}
static dequeue() {
if (this.workingOnPromise) {
return false
}
if (this.stop) {
this.queue = []
this.stop = false
return
}
const item = this.queue.shift()
if (!item) {
return false
}
try {
this.workingOnPromise = true
item
.promise()
.then((value) => {
this.workingOnPromise = false
item.resolve(value)
this.dequeue()
})
.catch((err) => {
this.workingOnPromise = false
item.reject(err)
this.dequeue()
})
} catch (err) {
this.workingOnPromise = false
item.reject(err)
this.dequeue()
}
return true
}
}
export default Queue
|
