filemanager.js

function FileManager()
{
	var _self = this;
	this.$defaultFilename = "default-ace-file";
	this.files = {};
	this.currentFile = null;

	this.new = _newFile;
	this.save = _saveSessions;
	this.load = _loadFile;
	this.roll = _loadFiles;
	this.setFile = _setCurrentFile;
	this.getFiles = _getFiles;
	this.delete = _deleteFile;
	this.rename = _renameFile;

	// functions for file save, load...
	function _loadFiles()
	{
		if(_chkStorage())
		{
			var estr = localStorage.getItem(_self.$defaultFilename);
			if(estr === null) {
				_initFiles(); 
				_loadFileStorageEvent.detail.msg = "Files Load";
				_loadFileStorageEvent.detail.userObj = _getFiles();
				document.dispatchEvent(_loadFileStorageEvent);
				return false;}
			else{
				_self.files = JSON.parse(estr);
				// _self.currentFile = _self.files[_self.$defaultFilename];
				_setCurrentFile(_self.files[_self.$defaultFilename]);
				_loadFileStorageEvent.detail.msg = "Files Load";
				_loadFileStorageEvent.detail.userObj = _getFiles();
				document.dispatchEvent(_loadFileStorageEvent);
				return true;
			}
		}
		return false;
	}

	function _initFiles()
	{
		var defaultFile = _self.files[_self.$defaultFilename] ={};
		defaultFile.filename = _self.$defaultFilename;
		defaultFile.theme = 0;
		defaultFile.mode = 'javascipt';
		defaultFile.contents = "//Start coding...\n";

		// _self.$defaultFile = defaultFile;
		_setCurrentFile(defaultFile);

	}

	function _newFile()
	{
		var now = new Date();
		var newFilename = prompt('Enter new FileName', String(now.getTime()));
		var nameDuplicateCheck = _getFiles().indexOf(newFilename);
		if(nameDuplicateCheck < 0)
		{
			// new file
			_self.files[newFilename] = {};
			var newFile = _self.files[newFilename];
			newFile.filename = newFilename;
			newFile.theme = 0;
			newFile.mode = 'javascript';
			newFile.contents = '//Start coding...\n';

			_saveSessions();
			_setCurrentFile(newFile);
			_newFileEvent.detail.fileObj = newFile;
			document.dispatchEvent(_newFileEvent);
		}
	}

	function _loadFile(filename)
	{
		var files = _self.files;
		if(files.hasOwnProperty(filename))
		{
			_saveSessions();
			_setCurrentFile(files[filename]);
		}
	}

	function _deleteFile(filename)
	{
		var f = filename || _self.currentFile.filename;
		if(_self.files.hasOwnProperty(f))
		{
			if(f === _self.$defaultFilename) {
				alert('Can\'t Delete Default File.');
				return false;
			}
			var s = confirm('Delete this file?');
			if(s)
			{
				var delFile = _self.files[f];
				_self.files[f] = null;
				_updateFiles();
				_setCurrentFile(_self.files[_self.$defaultFilename]);
				_saveSessions();
				_deleteFileEvent.detail.fileObj = delFile;
				document.dispatchEvent(_deleteFileEvent);
				return true;
			}
			return false;
		}
		return false
	}

	function _renameFile(filename)
	{
		var f = filename || _self.currentFile.filename;
		if(!_self.files.hasOwnProperty(f)){return false;}
		var n = prompt('Enter new Name', f);
		if(f === n) {return false;}
		else {
			var newFile = _self.files[n] = {};
			var oldFile = _self.files[f];
			for(i in oldFile) {newFile[i] = oldFile[i]; }
			newFile.filename = n;
			_self.files[oldFile.filename] = null;
			_updateFiles();
			if(!filename){_setCurrentFile(newFile);}
			return true;
		}
	}

	function _saveSessions()
	{
		var files = _self.files;
		files[_self.currentFile.filename] = _self.currentFile;
		var estr = JSON.stringify(_self.files);
		if(_chkStorage())
		{
			localStorage.setItem(_self.$defaultFilename, estr);
			_saveFileEvent.detail.time = new Date();
			document.dispatchEvent(_saveFileEvent);
			return true;
		}
		return false;
	}

	function _setCurrentFile(fileObj)
	{
		var aFile = fileObj || _self.files[_self.$defaultFilename];
		var oldFile = _self.currentFile;
		_self.currentFile = aFile;
		_changeFileEvent.detail.newFileObj = aFile;
		_changeFileEvent.detail.oldFileObj = oldFile;
		document.dispatchEvent(_changeFileEvent);
	}

	function _getFiles()
	{
		var a = new Array();
		for(i in _self.files) {a.push(i); }
		return a;
	}

	function _updateFiles()
	{
		var newFiles = {};
		for(i in _self.files)
		{
			if(_self.files[i] != null){newFiles[i] = _self.files[i];}
		}
		_self.files = newFiles;
	}

	function _chkStorage()
	{
		if(window.localStorage){return true;}
		return false;
	}
	// class custom event
	var _loadFileStorageEvent = new CustomEvent('loadFromStorage', {bubbles:true, cancelBubble:true, detail:{msg:"", userObj:null}});
	var _loadFileEvent = new CustomEvent('loadFile', {bubbles:true, cancelBubble:true, detail:{msg:"", fileObj:null}});
	var _changeFileEvent = new CustomEvent('changeFile', {bubbles:true, cancelBubble:true, detail:{msg:"", newFileObj:null, oldFileObj:null}});
	var _saveFileEvent = new CustomEvent('saveFile', {bubbles:true, cancelBubble:true, detail:{msg:"", time:null}});
	var _newFileEvent = new CustomEvent('newFile', {bubbles:true, cancelBubble:true, detail:{msg:"", fileObj:null}});
	var _deleteFileEvent = new CustomEvent('deleteFile', {bubbles:true, cancelBubble:true, detail:{msg:"", fileObj:null}});
}