mirror of
https://github.com/coderaiser/cloudcmd.git
synced 2026-01-23 18:55:26 +00:00
104 lines
3.6 KiB
JavaScript
104 lines
3.6 KiB
JavaScript
/* inspired by http://procbits.com/2011/10/29/a-node-js-experiment-thinking-asynchronously-recursion-calculate-file-size-directory */
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(function(){
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'use strict';
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if(!global.cloudcmd)
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return console.log(
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'# dir.js' + '\n' +
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'# -----------' + '\n' +
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'# Module is part of Cloud Commander,' + '\n' +
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'# used for getting dir size.' + '\n' +
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'# If you wont to see at work' + '\n' +
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'# try GET /api/v1/fs/etc?size or' + '\n' +
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'# dir.getSize(\'/etc, function(err, size) {' + '\n' +
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'# });' + '\n' +
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'# http://cloudcmd.io' + '\n');
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var main = global.cloudcmd.main,
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fs = main.fs,
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Util = main.util,
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path = main.path,
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/* The lstat() function shall be equivalent to stat(),
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except when path refers to a symbolic link. In that case lstat()
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shall return information about the link, while stat() shall return
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information about the file the link references.
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*/
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stat = fs.lstat.bind(fs);
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exports.isDir = function(name, callback) {
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name += '';
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stat(name, function(error, stat) {
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var isDir;
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if (!error)
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isDir = stat.isDirectory();
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Util.exec(callback, error, isDir);
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});
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};
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exports.getSize = function(dir, callback) {
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var total = 0;
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function calcSize(stat) {
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var size = stat && stat.size || 0;
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total += size;
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}
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processDir(dir, calcSize, function() {
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Util.exec(callback, null, total);
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});
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};
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function processDir(dir, func, callback) {
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var asyncRunning = 0,
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fileCounter = 1;
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function getDirInfo(dir) {
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stat(dir, Util.bind(getStat, dir));
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}
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function getStat(dir, error, stat) {
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--fileCounter;
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if (!error)
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if (stat.isFile())
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Util.exec(func, stat);
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else if (stat.isDirectory()) {
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++asyncRunning;
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fs.readdir(dir, function(error, files) {
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var dirPath, file, n, i;
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asyncRunning--;
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if (!error) {
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n = files.length;
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fileCounter += n;
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for (i = 0; i < n; i++) {
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file = files[i];
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dirPath = path.join(dir, file);
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process.nextTick(getDirInfo.bind(null, dirPath));
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}
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}
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if (!n)
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execCallBack();
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});
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}
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execCallBack();
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}
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function execCallBack() {
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if (!fileCounter && !asyncRunning)
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Util.exec(callback);
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}
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getDirInfo(dir);
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}
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})();
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