@reactivex/ix-es5-esm
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The Interactive Extensions for JavaScript
83 lines (81 loc) • 3.64 kB
JavaScript
import { __asyncGenerator, __asyncValues, __await, __extends, __generator } from "tslib";
import { AsyncIterableX } from '../asynciterablex.js';
import { wrapWithAbort } from './withabort.js';
import { throwIfAborted } from '../../aborterror.js';
/** @ignore */
var ThrottleAsyncIterable = /** @class */ (function (_super) {
__extends(ThrottleAsyncIterable, _super);
function ThrottleAsyncIterable(source, time) {
var _this = _super.call(this) || this;
_this._source = source;
_this._time = time;
return _this;
}
ThrottleAsyncIterable.prototype[Symbol.asyncIterator] = function (signal) {
return __asyncGenerator(this, arguments, function _a() {
var currentTime, previousTime, _b, _c, _d, item, e_1_1;
var _e, e_1, _f, _g;
return __generator(this, function (_h) {
switch (_h.label) {
case 0:
throwIfAborted(signal);
_h.label = 1;
case 1:
_h.trys.push([1, 8, 9, 14]);
_b = true, _c = __asyncValues(wrapWithAbort(this._source, signal));
_h.label = 2;
case 2: return [4 /*yield*/, __await(_c.next())];
case 3:
if (!(_d = _h.sent(), _e = _d.done, !_e)) return [3 /*break*/, 7];
_g = _d.value;
_b = false;
item = _g;
currentTime = Date.now();
if (!(!previousTime || currentTime - previousTime > this._time)) return [3 /*break*/, 6];
previousTime = currentTime;
return [4 /*yield*/, __await(item)];
case 4: return [4 /*yield*/, _h.sent()];
case 5:
_h.sent();
_h.label = 6;
case 6:
_b = true;
return [3 /*break*/, 2];
case 7: return [3 /*break*/, 14];
case 8:
e_1_1 = _h.sent();
e_1 = { error: e_1_1 };
return [3 /*break*/, 14];
case 9:
_h.trys.push([9, , 12, 13]);
if (!(!_b && !_e && (_f = _c.return))) return [3 /*break*/, 11];
return [4 /*yield*/, __await(_f.call(_c))];
case 10:
_h.sent();
_h.label = 11;
case 11: return [3 /*break*/, 13];
case 12:
if (e_1) throw e_1.error;
return [7 /*endfinally*/];
case 13: return [7 /*endfinally*/];
case 14: return [2 /*return*/];
}
});
});
};
return ThrottleAsyncIterable;
}(AsyncIterableX));
export { ThrottleAsyncIterable };
/**
* Throttles the source async-iterable sequence so that it doesn't emit more than one value during the given timeframe.
*
* @template TSource The type of elements in the source sequence.
* @param {number} time The time in milliseconds to throttle the source sequence.
* @returns {MonoTypeOperatorAsyncFunction<TSource>} The source sequence throttled by the given timeframe.
*/
export function throttle(time) {
return function throttleOperatorFunction(source) {
return new ThrottleAsyncIterable(source, time);
};
}
//# sourceMappingURL=throttle.js.map