90 lines
2.6 KiB
JavaScript
90 lines
2.6 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _once = require('./once');
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var _once2 = _interopRequireDefault(_once);
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var _iterator = require('./iterator');
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var _iterator2 = _interopRequireDefault(_iterator);
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var _onlyOnce = require('./onlyOnce');
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var _onlyOnce2 = _interopRequireDefault(_onlyOnce);
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var _wrapAsync = require('./wrapAsync');
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var _asyncEachOfLimit = require('./asyncEachOfLimit');
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var _asyncEachOfLimit2 = _interopRequireDefault(_asyncEachOfLimit);
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var _breakLoop = require('./breakLoop');
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var _breakLoop2 = _interopRequireDefault(_breakLoop);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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exports.default = limit => {
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return (obj, iteratee, callback) => {
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callback = (0, _once2.default)(callback);
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if (limit <= 0) {
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throw new RangeError('concurrency limit cannot be less than 1');
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}
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if (!obj) {
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return callback(null);
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}
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if ((0, _wrapAsync.isAsyncGenerator)(obj)) {
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return (0, _asyncEachOfLimit2.default)(obj, limit, iteratee, callback);
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}
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if ((0, _wrapAsync.isAsyncIterable)(obj)) {
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return (0, _asyncEachOfLimit2.default)(obj[Symbol.asyncIterator](), limit, iteratee, callback);
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}
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var nextElem = (0, _iterator2.default)(obj);
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var done = false;
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var canceled = false;
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var running = 0;
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var looping = false;
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function iterateeCallback(err, value) {
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if (canceled) return;
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running -= 1;
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if (err) {
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done = true;
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callback(err);
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} else if (err === false) {
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done = true;
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canceled = true;
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} else if (value === _breakLoop2.default || done && running <= 0) {
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done = true;
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return callback(null);
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} else if (!looping) {
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replenish();
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}
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}
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function replenish() {
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looping = true;
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while (running < limit && !done) {
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var elem = nextElem();
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if (elem === null) {
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done = true;
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if (running <= 0) {
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callback(null);
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}
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return;
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}
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running += 1;
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iteratee(elem.value, elem.key, (0, _onlyOnce2.default)(iterateeCallback));
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}
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looping = false;
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}
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replenish();
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};
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};
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module.exports = exports['default'];
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