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'use strict';
// Modeled very closely on the AbortController implementation
// in https://github.com/mysticatea/abort-controller (MIT license)
const {
ObjectAssign,
ObjectDefineProperties,
Symbol,
} = primordials;
const {
EventTarget,
Event
} = require('internal/event_target');
const {
customInspectSymbol,
emitExperimentalWarning
} = require('internal/util');
const { inspect } = require('internal/util/inspect');
const kAborted = Symbol('kAborted');
function customInspect(self, obj, depth, options) {
if (depth < 0)
return self;
const opts = ObjectAssign({}, options, {
depth: options.depth === null ? null : options.depth - 1
});
return `${self.constructor.name} ${inspect(obj, opts)}`;
}
class AbortSignal extends EventTarget {
get aborted() { return !!this[kAborted]; }
[customInspectSymbol](depth, options) {
return customInspect(this, {
aborted: this.aborted
}, depth, options);
}
}
ObjectDefineProperties(AbortSignal.prototype, {
aborted: { enumerable: true }
});
function abortSignal(signal) {
if (signal[kAborted]) return;
signal[kAborted] = true;
const event = new Event('abort');
if (typeof signal.onabort === 'function') {
signal.onabort(event);
}
signal.dispatchEvent(event);
}
// TODO(joyeecheung): V8 snapshot does not support instance member
// initializers for now:
// https://bugs.chromium.org/p/v8/issues/detail?id=10704
const kSignal = Symbol('signal');
class AbortController {
constructor() {
this[kSignal] = new AbortSignal();
emitExperimentalWarning('AbortController');
}
get signal() { return this[kSignal]; }
abort() { abortSignal(this[kSignal]); }
[customInspectSymbol](depth, options) {
return customInspect(this, {
signal: this.signal
}, depth, options);
}
}
ObjectDefineProperties(AbortController.prototype, {
signal: { enumerable: true },
abort: { enumerable: true }
});
module.exports = {
AbortController,
AbortSignal,
};
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