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 EmptyError_1 = require('../util/EmptyError');
function first(predicate, resultSelector, defaultValue) {
return this.lift(new FirstOperator(predicate, resultSelector, defaultValue, this));
}
exports.first = first;
var FirstOperator = (function () {
function FirstOperator(predicate, resultSelector, defaultValue, source) {
this.predicate = predicate;
this.resultSelector = resultSelector;
this.defaultValue = defaultValue;
this.source = source;
}
FirstOperator.prototype.call = function (observer) {
return new FirstSubscriber(observer, this.predicate, this.resultSelector, this.defaultValue, this.source);
};
return FirstOperator;
})();
var FirstSubscriber = (function (_super) {
__extends(FirstSubscriber, _super);
function FirstSubscriber(destination, predicate, resultSelector, defaultValue, source) {
_super.call(this, destination);
this.predicate = predicate;
this.resultSelector = resultSelector;
this.defaultValue = defaultValue;
this.source = source;
this.index = 0;
this.hasCompleted = false;
}
FirstSubscriber.prototype._next = function (value) {
var _a = this, destination = _a.destination, predicate = _a.predicate, resultSelector = _a.resultSelector;
var index = this.index++;
var passed = true;
if (predicate) {
passed = tryCatch_1.tryCatch(predicate)(value, index, this.source);
if (passed === errorObject_1.errorObject) {
destination.error(errorObject_1.errorObject.e);
return;
}
}
if (passed) {
if (resultSelector) {
var result = tryCatch_1.tryCatch(resultSelector)(value, index);
if (result === errorObject_1.errorObject) {
destination.error(errorObject_1.errorObject.e);
return;
}
destination.next(result);
}
else {
destination.next(value);
}
destination.complete();
this.hasCompleted = true;
}
};
FirstSubscriber.prototype._complete = function () {
var destination = this.destination;
if (!this.hasCompleted && typeof this.defaultValue !== 'undefined') {
destination.next(this.defaultValue);
destination.complete();
}
else Eif (!this.hasCompleted) {
destination.error(new EmptyError_1.EmptyError);
}
};
return FirstSubscriber;
})(Subscriber_1.Subscriber);
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