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/** PURE_IMPORTS_START tslib,_innerSubscribe PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';
export function distinct(keySelector, flushes) {
    return function (source) { return source.lift(new DistinctOperator(keySelector, flushes)); };
}
var DistinctOperator = /*@__PURE__*/ (function () {
    function DistinctOperator(keySelector, flushes) {
        this.keySelector = keySelector;
        this.flushes = flushes;
    }
    DistinctOperator.prototype.call = function (subscriber, source) {
        return source.subscribe(new DistinctSubscriber(subscriber, this.keySelector, this.flushes));
    };
    return DistinctOperator;
}());
var DistinctSubscriber = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(DistinctSubscriber, _super);
    function DistinctSubscriber(destination, keySelector, flushes) {
        var _this = _super.call(this, destination) || this;
        _this.keySelector = keySelector;
        _this.values = new Set();
        if (flushes) {
            _this.add(innerSubscribe(flushes, new SimpleInnerSubscriber(_this)));
        }
        return _this;
    }
    DistinctSubscriber.prototype.notifyNext = function () {
        this.values.clear();
    };
    DistinctSubscriber.prototype.notifyError = function (error) {
        this._error(error);
    };
    DistinctSubscriber.prototype._next = function (value) {
        if (this.keySelector) {
            this._useKeySelector(value);
        }
        else {
            this._finalizeNext(value, value);
        }
    };
    DistinctSubscriber.prototype._useKeySelector = function (value) {
        var key;
        var destination = this.destination;
        try {
            key = this.keySelector(value);
        }
        catch (err) {
            destination.error(err);
            return;
        }
        this._finalizeNext(key, value);
    };
    DistinctSubscriber.prototype._finalizeNext = function (key, value) {
        var values = this.values;
        if (!values.has(key)) {
            values.add(key);
            this.destination.next(value);
        }
    };
    return DistinctSubscriber;
}(SimpleOuterSubscriber));
export { DistinctSubscriber };
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