145 lines
No EOL
4 KiB
JavaScript
145 lines
No EOL
4 KiB
JavaScript
'use strict';
|
|
|
|
var __defProp = Object.defineProperty;
|
|
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
|
|
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
|
|
var __publicField = (obj, key, value) => {
|
|
__defNormalProp(obj, typeof key !== "symbol" ? key + "" : key, value);
|
|
return value;
|
|
};
|
|
|
|
// src/lib/AsyncQueueEntry.ts
|
|
var _AsyncQueueEntry = class _AsyncQueueEntry {
|
|
constructor(queue) {
|
|
__publicField(this, "promise");
|
|
__publicField(this, "resolve");
|
|
__publicField(this, "reject");
|
|
__publicField(this, "queue");
|
|
__publicField(this, "signal", null);
|
|
__publicField(this, "signalListener", null);
|
|
this.queue = queue;
|
|
this.promise = new Promise((resolve, reject) => {
|
|
this.resolve = resolve;
|
|
this.reject = reject;
|
|
});
|
|
}
|
|
setSignal(signal) {
|
|
if (signal.aborted)
|
|
return this;
|
|
this.signal = signal;
|
|
this.signalListener = () => {
|
|
const index = this.queue["promises"].indexOf(this);
|
|
if (index !== -1)
|
|
this.queue["promises"].splice(index, 1);
|
|
this.reject(new Error("Request aborted manually"));
|
|
};
|
|
this.signal.addEventListener("abort", this.signalListener);
|
|
return this;
|
|
}
|
|
use() {
|
|
this.dispose();
|
|
this.resolve();
|
|
return this;
|
|
}
|
|
abort() {
|
|
this.dispose();
|
|
this.reject(new Error("Request aborted manually"));
|
|
return this;
|
|
}
|
|
dispose() {
|
|
if (this.signal) {
|
|
this.signal.removeEventListener("abort", this.signalListener);
|
|
this.signal = null;
|
|
this.signalListener = null;
|
|
}
|
|
}
|
|
};
|
|
__name(_AsyncQueueEntry, "AsyncQueueEntry");
|
|
var AsyncQueueEntry = _AsyncQueueEntry;
|
|
|
|
// src/lib/AsyncQueue.ts
|
|
var _AsyncQueue = class _AsyncQueue {
|
|
constructor() {
|
|
/**
|
|
* The promises array
|
|
*/
|
|
__publicField(this, "promises", []);
|
|
}
|
|
/**
|
|
* The amount of entries in the queue, including the head.
|
|
* @seealso {@link queued} for the queued count.
|
|
*/
|
|
get remaining() {
|
|
return this.promises.length;
|
|
}
|
|
/**
|
|
* The amount of queued entries.
|
|
* @seealso {@link remaining} for the count with the head.
|
|
*/
|
|
get queued() {
|
|
return this.remaining === 0 ? 0 : this.remaining - 1;
|
|
}
|
|
/**
|
|
* Waits for last promise and queues a new one
|
|
* @example
|
|
* ```typescript
|
|
* const queue = new AsyncQueue();
|
|
* async function request(url, options) {
|
|
* await queue.wait({ signal: options.signal });
|
|
* try {
|
|
* const result = await fetch(url, options);
|
|
* // Do some operations with 'result'
|
|
* } finally {
|
|
* // Remove first entry from the queue and resolve for the next entry
|
|
* queue.shift();
|
|
* }
|
|
* }
|
|
*
|
|
* request(someUrl1, someOptions1); // Will call fetch() immediately
|
|
* request(someUrl2, someOptions2); // Will call fetch() after the first finished
|
|
* request(someUrl3, someOptions3); // Will call fetch() after the second finished
|
|
* ```
|
|
*/
|
|
wait(options) {
|
|
const entry = new AsyncQueueEntry(this);
|
|
if (this.promises.length === 0) {
|
|
this.promises.push(entry);
|
|
return Promise.resolve();
|
|
}
|
|
this.promises.push(entry);
|
|
if (options?.signal)
|
|
entry.setSignal(options.signal);
|
|
return entry.promise;
|
|
}
|
|
/**
|
|
* Unlocks the head lock and transfers the next lock (if any) to the head.
|
|
*/
|
|
shift() {
|
|
if (this.promises.length === 0)
|
|
return;
|
|
if (this.promises.length === 1) {
|
|
this.promises.shift();
|
|
return;
|
|
}
|
|
this.promises.shift();
|
|
this.promises[0].use();
|
|
}
|
|
/**
|
|
* Aborts all the pending promises.
|
|
* @note To avoid race conditions, this does **not** unlock the head lock.
|
|
*/
|
|
abortAll() {
|
|
if (this.queued === 0)
|
|
return;
|
|
for (let i = 1; i < this.promises.length; ++i) {
|
|
this.promises[i].abort();
|
|
}
|
|
this.promises.length = 1;
|
|
}
|
|
};
|
|
__name(_AsyncQueue, "AsyncQueue");
|
|
var AsyncQueue = _AsyncQueue;
|
|
|
|
exports.AsyncQueue = AsyncQueue;
|
|
//# sourceMappingURL=out.js.map
|
|
//# sourceMappingURL=index.cjs.map
|