fileOpener2Proxy.js

	var cordova = require('cordova'),
		fileOpener2 = require('./FileOpener2');

	var schemes = [
        { protocol: 'ms-app', getFile: getFileFromApplicationUri },
        { protocol: 'cdvfile', getFile: getFileFromFileUri }    //protocol cdvfile
	]

	function nthIndex(str, pat, n) {
	    var L = str.length, i = -1;
	    while (n-- && i++ < L) {
	        i = str.indexOf(pat, i);
	        if (i < 0) break;
	    }
	    return i;
	}

	function getFileFromApplicationUri(uri) {
	    /* bad path from a file entry due to the last '//' 
               example: ms-appdata:///local//path/to/file
            */
	    var index = nthIndex(uri, "//", 3);
	    var newUri = uri.substr(0, index) + uri.substr(index + 1);

	    var applicationUri = new Windows.Foundation.Uri(newUri);

	    return Windows.Storage.StorageFile.getFileFromApplicationUriAsync(applicationUri);
	}

	function getFileFromFileUri(uri) {
	    /* uri example:
               cdvfile://localhost/persistent|temporary|another-fs-root/path/to/file
            */
	    var indexFrom = nthIndex(uri, "/", 3) + 1;
	    var indexTo = nthIndex(uri, "/", 4);
	    var whichFolder = uri.substring(indexFrom, indexTo);
	    var filePath = uri.substr(indexTo + 1);
	    var path = "\\" + filePath;

	    if (whichFolder == "persistent") {
	        path = Windows.Storage.ApplicationData.current.localFolder.path + path;
	    }
	    else {  //temporary, note: no roaming management
	        path = Windows.Storage.ApplicationData.current.temporaryFolder.path + path;
	    }

	    return getFileFromNativePath(path);
	}

	function getFileFromNativePath(path) {
	    var nativePath = path.split("/").join("\\");

	    return Windows.Storage.StorageFile.getFileFromPathAsync(nativePath);
	}

	function getFileLoaderForScheme(path) {
	    var fileLoader = getFileFromNativePath;

	    schemes.some(function (scheme) {
	        return path.indexOf(scheme.protocol) === 0 ? ((fileLoader = scheme.getFile), true) : false;
	    });

	    return fileLoader;
	}

	module.exports = {

	    open: function (successCallback, errorCallback, args) {
	        
	        var path = args[0];
	        
	        var getFile = getFileLoaderForScheme(path);
	        
	        getFile(path).then(function (file) {
	            var options = new Windows.System.LauncherOptions();
	            
	            Windows.System.Launcher.launchFileAsync(file, options).then(function (success) {
	                successCallback();
	            }, function (error) {
	                errorCallback(error);
	            });

	        }, function (error) {
	            console.log("Error while opening the file: "+error);
		    errorCallback(error);
	        });
		}
		
	};

	require("cordova/exec/proxy").add("FileOpener2", module.exports);