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