var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) Eif (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');
var tryCatch_1 = require('../util/tryCatch');
var errorObject_1 = require('../util/errorObject');
var bindCallback_1 = require('../util/bindCallback');
var EmptyError_1 = require('../util/EmptyError');
function single(predicate, thisArg) {
return this.lift(new SingleOperator(predicate, thisArg, this));
}
exports.single = single;
var SingleOperator = (function () {
function SingleOperator(predicate, thisArg, source) {
this.predicate = predicate;
this.thisArg = thisArg;
this.source = source;
}
SingleOperator.prototype.call = function (subscriber) {
return new SingleSubscriber(subscriber, this.predicate, this.thisArg, this.source);
};
return SingleOperator;
})();
var SingleSubscriber = (function (_super) {
__extends(SingleSubscriber, _super);
function SingleSubscriber(destination, predicate, thisArg, source) {
_super.call(this, destination);
this.thisArg = thisArg;
this.source = source;
this.seenValue = false;
this.index = 0;
if (typeof predicate === 'function') {
this.predicate = bindCallback_1.bindCallback(predicate, thisArg, 3);
}
}
SingleSubscriber.prototype.applySingleValue = function (value) {
if (this.seenValue) {
this.destination.error('Sequence contains more than one element');
}
else {
this.seenValue = true;
this.singleValue = value;
}
};
SingleSubscriber.prototype._next = function (value) {
var predicate = this.predicate;
var currentIndex = this.index++;
if (predicate) {
var result = tryCatch_1.tryCatch(predicate)(value, currentIndex, this.source);
if (result === errorObject_1.errorObject) {
this.destination.error(result.e);
}
else if (result) {
this.applySingleValue(value);
}
}
else {
this.applySingleValue(value);
}
};
SingleSubscriber.prototype._complete = function () {
var destination = this.destination;
if (this.index > 0) {
destination.next(this.seenValue ? this.singleValue : undefined);
destination.complete();
}
else {
destination.error(new EmptyError_1.EmptyError);
}
};
return SingleSubscriber;
})(Subscriber_1.Subscriber);
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