1/*
 2 *
 3 * Licensed to the Apache Software Foundation (ASF) under one
 4 * or more contributor license agreements.  See the NOTICE file
 5 * distributed with this work for additional information
 6 * regarding copyright ownership.  The ASF licenses this file
 7 * to you under the Apache License, Version 2.0 (the
 8 * "License"); you may not use this file except in compliance
 9 * with the License.  You may obtain a copy of the License at
10 *
11 *   http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied.  See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20*/
21
22var exec = require('cordova/exec'),
23    FileError = require('./FileError') ;
24
25/**
26 * An interface that lists the files and directories in a directory.
27 */
28function DirectoryReader(localURL) {
29    this.localURL = localURL || null;
30    this.hasReadEntries = false;
31}
32
33/**
34 * Returns a list of entries from a directory.
35 *
36 * @param {Function} successCallback is called with a list of entries
37 * @param {Function} errorCallback is called with a FileError
38 */
39DirectoryReader.prototype.readEntries = function(successCallback, errorCallback) {
40    // If we've already read and passed on this directory's entries, return an empty list.
41    if (this.hasReadEntries) {
42        successCallback([]);
43        return;
44    }
45    var reader = this;
46    var win = typeof successCallback !== 'function' ? null : function(result) {
47        var retVal = [];
48        for (var i=0; i<result.length; i++) {
49            var entry = null;
50            if (result[i].isDirectory) {
51                entry = new (require('./DirectoryEntry'))();
52            }
53            else if (result[i].isFile) {
54                entry = new (require('./FileEntry'))();
55            }
56            entry.isDirectory = result[i].isDirectory;
57            entry.isFile = result[i].isFile;
58            entry.name = result[i].name;
59            entry.fullPath = result[i].fullPath;
60            entry.filesystem = new (require('./FileSystem'))(result[i].filesystemName);
61            entry.nativeURL = result[i].nativeURL;
62            retVal.push(entry);
63        }
64        reader.hasReadEntries = true;
65        successCallback(retVal);
66    };
67    var fail = typeof errorCallback !== 'function' ? null : function(code) {
68        errorCallback(new FileError(code));
69    };
70    exec(win, fail, "File", "readEntries", [this.localURL]);
71};
72
73module.exports = DirectoryReader;