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unboundedpress/node_modules/async/internal/asyncEachOfLimit.js

75 lines
1.9 KiB
JavaScript

5 years ago
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = asyncEachOfLimit;
var _breakLoop = require('./breakLoop');
var _breakLoop2 = _interopRequireDefault(_breakLoop);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
// for async generators
function asyncEachOfLimit(generator, limit, iteratee, callback) {
let done = false;
let canceled = false;
let awaiting = false;
let running = 0;
let idx = 0;
function replenish() {
//console.log('replenish')
if (running >= limit || awaiting || done) return;
//console.log('replenish awaiting')
awaiting = true;
generator.next().then(({ value, done: iterDone }) => {
//console.log('got value', value)
if (canceled || done) return;
awaiting = false;
if (iterDone) {
done = true;
if (running <= 0) {
//console.log('done nextCb')
callback(null);
}
return;
}
running++;
iteratee(value, idx, iterateeCallback);
idx++;
replenish();
}).catch(handleError);
}
function iterateeCallback(err, result) {
//console.log('iterateeCallback')
running -= 1;
if (canceled) return;
if (err) return handleError(err);
if (err === false) {
done = true;
canceled = true;
return;
}
if (result === _breakLoop2.default || done && running <= 0) {
done = true;
//console.log('done iterCb')
return callback(null);
}
replenish();
}
function handleError(err) {
if (canceled) return;
awaiting = false;
done = true;
callback(err);
}
replenish();
}
module.exports = exports['default'];