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var SapphireAsyncQueue = (function (exports) {
'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;
return exports;
})({});
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