diff options
Diffstat (limited to 'node_modules/@mrmlnc/readdir-enhanced/lib/async')
-rw-r--r-- | node_modules/@mrmlnc/readdir-enhanced/lib/async/for-each.js | 29 | ||||
-rw-r--r-- | node_modules/@mrmlnc/readdir-enhanced/lib/async/index.js | 48 |
2 files changed, 77 insertions, 0 deletions
diff --git a/node_modules/@mrmlnc/readdir-enhanced/lib/async/for-each.js b/node_modules/@mrmlnc/readdir-enhanced/lib/async/for-each.js new file mode 100644 index 0000000..1ac9b2f --- /dev/null +++ b/node_modules/@mrmlnc/readdir-enhanced/lib/async/for-each.js @@ -0,0 +1,29 @@ +'use strict'; + +module.exports = asyncForEach; + +/** + * Simultaneously processes all items in the given array. + * + * @param {array} array - The array to iterate over + * @param {function} iterator - The function to call for each item in the array + * @param {function} done - The function to call when all iterators have completed + */ +function asyncForEach (array, iterator, done) { + if (array.length === 0) { + // NOTE: Normally a bad idea to mix sync and async, but it's safe here because + // of the way that this method is currently used by DirectoryReader. + done(); + return; + } + + // Simultaneously process all items in the array. + let pending = array.length; + array.forEach(item => { + iterator(item, () => { + if (--pending === 0) { + done(); + } + }); + }); +} diff --git a/node_modules/@mrmlnc/readdir-enhanced/lib/async/index.js b/node_modules/@mrmlnc/readdir-enhanced/lib/async/index.js new file mode 100644 index 0000000..677e0b6 --- /dev/null +++ b/node_modules/@mrmlnc/readdir-enhanced/lib/async/index.js @@ -0,0 +1,48 @@ +'use strict'; + +module.exports = readdirAsync; + +const maybe = require('call-me-maybe'); +const DirectoryReader = require('../directory-reader'); + +let asyncFacade = { + fs: require('fs'), + forEach: require('./for-each'), + async: true +}; + +/** + * Returns the buffered output from an asynchronous {@link DirectoryReader}, + * via an error-first callback or a {@link Promise}. + * + * @param {string} dir + * @param {object} [options] + * @param {function} [callback] + * @param {object} internalOptions + */ +function readdirAsync (dir, options, callback, internalOptions) { + if (typeof options === 'function') { + callback = options; + options = undefined; + } + + return maybe(callback, new Promise(((resolve, reject) => { + let results = []; + + internalOptions.facade = asyncFacade; + + let reader = new DirectoryReader(dir, options, internalOptions); + let stream = reader.stream; + + stream.on('error', err => { + reject(err); + stream.pause(); + }); + stream.on('data', result => { + results.push(result); + }); + stream.on('end', () => { + resolve(results); + }); + }))); +} |