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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { EventImpl } from "./event.ts";
import { EventTargetImpl } from "./event_target.ts";
export const add = Symbol("add");
export const signalAbort = Symbol("signalAbort");
export const remove = Symbol("remove");
export class AbortSignalImpl extends EventTargetImpl implements AbortSignal {
#aborted?: boolean;
#abortAlgorithms = new Set<() => void>();
// eslint-disable-next-line @typescript-eslint/no-explicit-any
onabort: ((this: AbortSignal, ev: Event) => any) | null = null;
[add](algorithm: () => void): void {
this.#abortAlgorithms.add(algorithm);
}
[signalAbort](): void {
if (this.#aborted) {
return;
}
this.#aborted = true;
for (const algorithm of this.#abortAlgorithms) {
algorithm();
}
this.#abortAlgorithms.clear();
this.dispatchEvent(new EventImpl("abort"));
}
[remove](algorithm: () => void): void {
this.#abortAlgorithms.delete(algorithm);
}
constructor() {
super();
this.addEventListener("abort", (evt: Event) => {
const { onabort } = this;
if (typeof onabort === "function") {
onabort.call(this, evt);
}
});
}
get aborted(): boolean {
return Boolean(this.#aborted);
}
get [Symbol.toStringTag](): string {
return "AbortSignal";
}
}
Object.defineProperty(AbortSignalImpl, "name", {
value: "AbortSignal",
configurable: true,
});
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