From d91c8dc97c9244ce2fd2a6e9c9b362696b9b66d4 Mon Sep 17 00:00:00 2001
From: coderaiser <mnemonic.enemy@gmail.com>
Date: Sun, 7 Apr 2013 06:54:29 -0400
Subject: [PATCH] added module dir

---
 lib/server/dir.js | 64 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 lib/server/dir.js

diff --git a/lib/server/dir.js b/lib/server/dir.js
new file mode 100644
index 00000000..22d91658
--- /dev/null
+++ b/lib/server/dir.js
@@ -0,0 +1,64 @@
+/* inspired by http://procbits.com/2011/10/29/a-node-js-experiment-thinking-asynchronously-recursion-calculate-file-size-directory */
+(function(){
+    'use strict';
+    
+    if(!global.cloudcmd)
+        return console.log(
+             '# dirsize.js'                                     + '\n'  +
+             '# -----------'                                    + '\n'  +
+             '# Module is part of Cloud Commander,'             + '\n'  +
+             '# used for getting dir size.'                     + '\n'  +
+             '# If you wont to see at work'                     + '\n'  +
+             '# try GET /api/v1/fs/etc?size or'                 + '\n'  +
+             '# dir.getSize(\'/etc, function(err, size){'   + '\n'  +
+             '# });'                 + '\n'  +
+             '# http://coderaiser.github.com/cloudcmd'          + '\n');
+             
+    var main    = global.cloudcmd.main,
+        fs      = main.fs,
+        path    = main.path;
+    
+    exports.getSize = function(pDir, pCallBack) {
+        var lAsyncRunning   = 0,
+            lFileCounter    = 1,
+            lTotal          = 0;
+        
+        function getDirSize(pDir) {
+            /*  The lstat() function shall be equivalent to stat(),
+                except when path refers to a symbolic link. In that case lstat()
+                shall return information about the link, while stat() shall return
+                information about the file the link references. */
+            
+            fs.lstat(pDir, function(pError, pStat) {
+                --lFileCounter;
+                
+                if (!pError) {
+                    if ( pStat.isFile() )
+                        lTotal += pStat.size;
+                    else if ( pStat.isDirectory() ) {
+                        ++lAsyncRunning;
+                        
+                        fs.readdir(pDir, function(pError, pFiles) {
+                            lAsyncRunning--;
+                            
+                            if (!pError){
+                                lFileCounter += pFiles.length;
+                                
+                                var lDirPath;
+                                for (var i = 0, n = pFiles.length; i < n; i++) {
+                                    lDirPath = path.join(pDir, pFiles[i]);
+                                    getDirSize(lDirPath);
+                                }
+                            }
+                        });
+                    }
+                }
+                
+                if (!lFileCounter && !lAsyncRunning)
+                    pCallBack(null, lTotal);
+                });
+            }
+        
+        return getDirSize(pDir);
+    };
+})();
\ No newline at end of file