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import { isThenable } from './is.js';
/* eslint-disable @typescript-eslint/explicit-function-return-type */
/** SyncPromise internal states */
var States; (function (States) {
/** Pending */
const PENDING = 0; States[States["PENDING"] = PENDING] = "PENDING";
/** Resolved / OK */
const RESOLVED = 1; States[States["RESOLVED"] = RESOLVED] = "RESOLVED";
/** Rejected / Error */
const REJECTED = 2; States[States["REJECTED"] = REJECTED] = "REJECTED";
})(States || (States = {}));
// Overloads so we can call resolvedSyncPromise without arguments and generic argument
/**
* Creates a resolved sync promise.
*
* @param value the value to resolve the promise with
* @returns the resolved sync promise
*/
function resolvedSyncPromise(value) {
return new SyncPromise(resolve => {
resolve(value);
});
}
/**
* Creates a rejected sync promise.
*
* @param value the value to reject the promise with
* @returns the rejected sync promise
*/
function rejectedSyncPromise(reason) {
return new SyncPromise((_, reject) => {
reject(reason);
});
}
/**
* Thenable class that behaves like a Promise and follows it's interface
* but is not async internally
*/
class SyncPromise {
__init() {this._state = States.PENDING;}
__init2() {this._handlers = [];}
constructor(
executor,
) {SyncPromise.prototype.__init.call(this);SyncPromise.prototype.__init2.call(this);SyncPromise.prototype.__init3.call(this);SyncPromise.prototype.__init4.call(this);SyncPromise.prototype.__init5.call(this);SyncPromise.prototype.__init6.call(this);
try {
executor(this._resolve, this._reject);
} catch (e) {
this._reject(e);
}
}
/** JSDoc */
then(
onfulfilled,
onrejected,
) {
return new SyncPromise((resolve, reject) => {
this._handlers.push([
false,
result => {
if (!onfulfilled) {
// TODO: ¯\_(ツ)_/¯
// TODO: FIXME
resolve(result );
} else {
try {
resolve(onfulfilled(result));
} catch (e) {
reject(e);
}
}
},
reason => {
if (!onrejected) {
reject(reason);
} else {
try {
resolve(onrejected(reason));
} catch (e) {
reject(e);
}
}
},
]);
this._executeHandlers();
});
}
/** JSDoc */
catch(
onrejected,
) {
return this.then(val => val, onrejected);
}
/** JSDoc */
finally(onfinally) {
return new SyncPromise((resolve, reject) => {
let val;
let isRejected;
return this.then(
value => {
isRejected = false;
val = value;
if (onfinally) {
onfinally();
}
},
reason => {
isRejected = true;
val = reason;
if (onfinally) {
onfinally();
}
},
).then(() => {
if (isRejected) {
reject(val);
return;
}
resolve(val );
});
});
}
/** JSDoc */
__init3() {this._resolve = (value) => {
this._setResult(States.RESOLVED, value);
};}
/** JSDoc */
__init4() {this._reject = (reason) => {
this._setResult(States.REJECTED, reason);
};}
/** JSDoc */
__init5() {this._setResult = (state, value) => {
if (this._state !== States.PENDING) {
return;
}
if (isThenable(value)) {
void (value ).then(this._resolve, this._reject);
return;
}
this._state = state;
this._value = value;
this._executeHandlers();
};}
/** JSDoc */
__init6() {this._executeHandlers = () => {
if (this._state === States.PENDING) {
return;
}
const cachedHandlers = this._handlers.slice();
this._handlers = [];
cachedHandlers.forEach(handler => {
if (handler[0]) {
return;
}
if (this._state === States.RESOLVED) {
// eslint-disable-next-line @typescript-eslint/no-floating-promises
handler[1](this._value );
}
if (this._state === States.REJECTED) {
handler[2](this._value);
}
handler[0] = true;
});
};}
}
export { SyncPromise, rejectedSyncPromise, resolvedSyncPromise };
//# sourceMappingURL=syncpromise.js.map
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