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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.single = void 0;
var EmptyError_1 = require("../util/EmptyError");
var SequenceError_1 = require("../util/SequenceError");
var NotFoundError_1 = require("../util/NotFoundError");
var lift_1 = require("../util/lift");
var OperatorSubscriber_1 = require("./OperatorSubscriber");
function single(predicate) {
return lift_1.operate(function (source, subscriber) {
var hasValue = false;
var singleValue;
var seenValue = false;
var index = 0;
source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function (value) {
seenValue = true;
if (!predicate || predicate(value, index++, source)) {
hasValue && subscriber.error(new SequenceError_1.SequenceError('Too many matching values'));
hasValue = true;
singleValue = value;
}
}, function () {
if (hasValue) {
subscriber.next(singleValue);
subscriber.complete();
}
else {
subscriber.error(seenValue ? new NotFoundError_1.NotFoundError('No matching values') : new EmptyError_1.EmptyError());
}
}));
});
}
exports.single = single;
//# sourceMappingURL=single.js.map
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