"use strict";
var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var Subscriber_1 = require('../Subscriber');
/**
 * Catches errors on the observable to be handled by returning a new observable or throwing an error.
 * @param {function} selector a function that takes as arguments `err`, which is the error, and `caught`, which
 *  is the source observable, in case you'd like to "retry" that observable by returning it again. Whatever observable
 *  is returned by the `selector` will be used to continue the observable chain.
 * @return {Observable} an observable that originates from either the source or the observable returned by the
 *  catch `selector` function.
 * @method catch
 * @owner Observable
 */
function _catch(selector) {
    var operator = new CatchOperator(selector);
    var caught = this.lift(operator);
    return (operator.caught = caught);
}
exports._catch = _catch;
var CatchOperator = (function () {
    function CatchOperator(selector) {
        this.selector = selector;
    }
    CatchOperator.prototype.call = function (subscriber) {
        return new CatchSubscriber(subscriber, this.selector, this.caught);
    };
    return CatchOperator;
}());
var CatchSubscriber = (function (_super) {
    __extends(CatchSubscriber, _super);
    function CatchSubscriber(destination, selector, caught) {
        _super.call(this, destination);
        this.selector = selector;
        this.caught = caught;
    }
    // NOTE: overriding `error` instead of `_error` because we don't want
    // to have this flag this subscriber as `isStopped`.
    CatchSubscriber.prototype.error = function (err) {
        if (!this.isStopped) {
            var result = void 0;
            try {
                result = this.selector(err, this.caught);
            }
            catch (err) {
                this.destination.error(err);
                return;
            }
            this._innerSub(result);
        }
    };
    CatchSubscriber.prototype._innerSub = function (result) {
        this.unsubscribe();
        this.destination.remove(this);
        result.subscribe(this.destination);
    };
    return CatchSubscriber;
}(Subscriber_1.Subscriber));
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