Simple file stat infomation module

fileinfo.js

var fs       = require('fs'),
    util     = require('util'),
    imgsize  = require('image-size');

module.exports = (function(){
    var supportExt = ["jpg", "jpeg", "png"];  // supported extension array
    var dirPath = "";      // directory path
    var fileList = [];     // file name array
    var fileInfo = [{}];   // array of file info object

    // get filename list array length
    var getFileCount = function() {
        return fileList.length;
    };

    // set directory path for getting file list and infos
    var setDirPath = function(path) {
        dirPath = path;
    };

    // currently set directory path
    var getDirPath = function() {
        return dirPath;
    };

    // add supported file extension
    var addFileExt = function(extension) {
        supportExt.push(extension);
    };

    // get filename list from given directory path
    var getFileListWithPath = function(path) {
        fileList = fs.readdirSync(path);
        if( fileList == null ) {
            console.error("get file list error : " + error.errno);
            return null;
        }

        return fileList;
    };

    // return currently maintaining filename list
    var getFileList = function() {
        fileList = fs.readdirSync(dirPath);
        if( fileList == null ) {
            console.error("get file list error : " + error.errno);
            return null;
        }

        return fileList;
    };

    // read file stat from storage file and keep,return them
    var getFileInfo = function(path,callback) {
        if( path != null ) {
            setDirPath(path);
        }
        getFileList();

        // John Resig (MIT Licensed)
        Array.prototype.remove = function(from, to) {
            var rest = this.slice((to || from) + 1 || this.length);
            this.length = from < 0 ? this.length + from : from;
            return this.push.apply(this, rest);
        };

        for(var i=0; i<fileList.length; i++) {
            ext = fileList[i].split('.').pop();

            if( supportExt.indexOf(ext) == -1 ) {
                console.log("Unsupported file extension : " + ext);
                fileList.remove(i);
                continue;
            }

            var filePath = dirPath + "/" + fileList[i];
            var fileStat = fs.statSync(filePath);
            if( ! fileStat.isFile() ) {
                continue;
            }
            var dimen = imgsize(filePath);
            var portland = dimen.height >= dimen.width ? "port" : "land";

            // console.log("File [ " + filePath + "]");

            var fileStatStr = util.inspect(fileStat);

            var fileSize = fileStatStr.replace(/[{}, ]/g, '')
                                      .split('\n')[8]
                                      .split(':')[1];

            var fileObj =   {
                                filename: fileList[i], 
                                filesize: fileSize, 
                                portland: portland
                            };

            callback(fileObj);
            // console.log(JSON.stringify(fileObj));
        }
    };

    return {
        addSupportFileExt: addFileExt,
        getFileCount: getFileCount,
        getDirPath: getDirPath,
        getFileList: getFileList,
        getFileListWithPath: getFileListWithPath,
        getFileInfo: getFileInfo
    };
}());

/*
var finfo = require('fileinfo.js');

(function() {
    var dirPath = "../public/img/laos1";
    
    finfo.getFileInfo(dirPath, function(fileObj) {
        console.log(JSON.stringify(fileObj);
    });
}());

*/