diff options
Diffstat (limited to 'sandbox/testAppNevena/Front/node_modules/p-map/index.js')
-rw-r--r-- | sandbox/testAppNevena/Front/node_modules/p-map/index.js | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/sandbox/testAppNevena/Front/node_modules/p-map/index.js b/sandbox/testAppNevena/Front/node_modules/p-map/index.js new file mode 100644 index 00000000..c11a2851 --- /dev/null +++ b/sandbox/testAppNevena/Front/node_modules/p-map/index.js @@ -0,0 +1,81 @@ +'use strict'; +const AggregateError = require('aggregate-error'); + +module.exports = async ( + iterable, + mapper, + { + concurrency = Infinity, + stopOnError = true + } = {} +) => { + return new Promise((resolve, reject) => { + if (typeof mapper !== 'function') { + throw new TypeError('Mapper function is required'); + } + + if (!((Number.isSafeInteger(concurrency) || concurrency === Infinity) && concurrency >= 1)) { + throw new TypeError(`Expected \`concurrency\` to be an integer from 1 and up or \`Infinity\`, got \`${concurrency}\` (${typeof concurrency})`); + } + + const result = []; + const errors = []; + const iterator = iterable[Symbol.iterator](); + let isRejected = false; + let isIterableDone = false; + let resolvingCount = 0; + let currentIndex = 0; + + const next = () => { + if (isRejected) { + return; + } + + const nextItem = iterator.next(); + const index = currentIndex; + currentIndex++; + + if (nextItem.done) { + isIterableDone = true; + + if (resolvingCount === 0) { + if (!stopOnError && errors.length !== 0) { + reject(new AggregateError(errors)); + } else { + resolve(result); + } + } + + return; + } + + resolvingCount++; + + (async () => { + try { + const element = await nextItem.value; + result[index] = await mapper(element, index); + resolvingCount--; + next(); + } catch (error) { + if (stopOnError) { + isRejected = true; + reject(error); + } else { + errors.push(error); + resolvingCount--; + next(); + } + } + })(); + }; + + for (let i = 0; i < concurrency; i++) { + next(); + + if (isIterableDone) { + break; + } + } + }); +}; |