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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// This module provides an interface to `Deno.core`. For environments
// that don't have access to `Deno.core` some APIs are polyfilled, while
// some are unavailble and throw on call.
// Note: deno_std shouldn't use Deno.core namespace. We should minimize these
// usages.
import { TextEncoder } from "ext:deno_web/08_text_encoding.js";
// deno-lint-ignore no-explicit-any
let DenoCore: any;
// deno-lint-ignore no-explicit-any
const { Deno } = globalThis as any;
// @ts-ignore Deno.core is not defined in types
if (Deno?.[Deno.internal]?.core) {
// @ts-ignore Deno[Deno.internal].core is not defined in types
DenoCore = Deno[Deno.internal].core;
} else if (Deno?.core) {
// @ts-ignore Deno.core is not defined in types
DenoCore = Deno.core;
} else {
DenoCore = {};
}
export const core = {
runMicrotasks: DenoCore.runMicrotasks ?? function () {
throw new Error(
"Deno.core.runMicrotasks() is not supported in this environment",
);
},
setHasTickScheduled: DenoCore.setHasTickScheduled ?? function () {
throw new Error(
"Deno.core.setHasTickScheduled() is not supported in this environment",
);
},
hasTickScheduled: DenoCore.hasTickScheduled ?? function () {
throw new Error(
"Deno.core.hasTickScheduled() is not supported in this environment",
);
},
setNextTickCallback: DenoCore.setNextTickCallback ?? undefined,
setMacrotaskCallback: DenoCore.setMacrotaskCallback ?? function () {
throw new Error(
"Deno.core.setNextTickCallback() is not supported in this environment",
);
},
evalContext: DenoCore.evalContext ??
function (_code: string, _filename: string) {
throw new Error(
"Deno.core.evalContext is not supported in this environment",
);
},
encode: DenoCore.encode ?? function (chunk: string): Uint8Array {
return new TextEncoder().encode(chunk);
},
eventLoopHasMoreWork: DenoCore.eventLoopHasMoreWork ?? function (): boolean {
return false;
},
isProxy: DenoCore.isProxy ?? function (): boolean {
return false;
},
getPromiseDetails: DenoCore.getPromiseDetails ??
function (_promise: Promise<unknown>): [number, unknown] {
throw new Error(
"Deno.core.getPromiseDetails is not supported in this environment",
);
},
setPromiseHooks: DenoCore.setPromiseHooks ?? function () {
throw new Error(
"Deno.core.setPromiseHooks is not supported in this environment",
);
},
ops: DenoCore.ops ?? {
op_napi_open(_filename: string) {
throw new Error(
"Node API is not supported in this environment",
);
},
},
};
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