Remove cache, detect corruption, detect it's open, refactor

src/main.js

@@ -8,6 +8,8 @@ var Conf = {
 	,dbHost: 'db.verdnatura.es'
 	,defaultModule: 'tpv'
 	,defaultLocale: 'es'
+	,dbName: 'vn2008'
+	,maxSize: 500
 };
 
 var Locale = {
@@ -22,6 +24,8 @@ var Locale = {
 			"Actualizando"
 		,"Bad login":
 			"Usuario o contraseña incorrectos"
+		,"Application it's already open":
+			"La aplicación ya está abierta"
 		,"Loading":
 			"Cargando"
 		,"Error while updating":
@@ -30,6 +34,8 @@ var Locale = {
 			"Microsoft Access 2003 no está instalado en el sistema"
 		,"MDB file not found":
 			"No se encontro el fichero MDB"
+		,"Cache deleted":
+			"Caché borrada"
 	}
 };
 
@@ -45,7 +51,7 @@ var App = {
 		window.moveTo((screen.width - width) / 2, (screen.height - height) / 2);
 	},
 	
-	_onLoad: function() {
+	onLoad: function() {
 		// Initializes the global variables
 	
 		var split = Verdnatura.commandLine.match(/(?:[^\s"]+|"[^"]*")+/g);
@@ -60,6 +66,7 @@ var App = {
 		this.remoteFile = Conf.remoteUrl +'/'+ this.module +'.7z';
 		this.compressFile = this.getEnv('TEMP') +'\\'+ this.module +'.7z';
 		this.mdbFile = this.moduleDir +'\\'+ this.module +'.mdb';
+		this.lockFile = this.moduleDir +'\\'+ this.module +'.ldb';
 
 		// Creates the necessary registry entries
 		
@@ -89,7 +96,7 @@ var App = {
 				'Driver'         : driverPath,
 				'DESCRIPTION'    : Conf.appName,
 				'SERVER'         : Conf.dbHost,
-				'DATABASE'       : 'vn2008',
+				'DATABASE'       : Conf.dbName,
 				'SSLCA'          : this.appDir +'\\cacert.pem',
 				'SSLVERIFY'      : 1,
 				'AUTO_RECONNECT' : 1
@@ -118,7 +125,7 @@ var App = {
 		if (remember && password) {
 			this.$('password').value = password;
 			this.$('remember').checked = true;
-			this._onEnterClick();
+			this.onEnterClick();
 		} else
 			this.resetForm(true);
 	},
@@ -139,9 +146,9 @@ var App = {
 			dsName, driverName, 'REG_SZ');	
 	},
 	
-	_disableUi: function(disabled, loadMessage) {
+	disableUi: function(disabled, loadMessage) {
 		if (disabled)
-			this._hideMessage();
+			this.hideMessage();
 		else
 			loadMessage = '';
 		
@@ -157,10 +164,24 @@ var App = {
 		this.$('spinner').style.display = display;
 	},
 
-	_onKeyPress: function(e) {
+	onCleanCacheClick: function() {
-		switch (e.keyCode) {
+		var file;
+		var folder = this.fso.getFolder(this.moduleDir);
+		var files = new Enumerator(folder.files);
+
+		for (; !files.atEnd(); files.moveNext()) {
+			var file = files.item();
+			if (/\.mdb$/.test(file.name) && file.name != 'config.mdb')
+				file.delete(file.name);
+		}
+
+		this.showMessage(_('Cache deleted'));
+	},
+
+	onKeyPress: function(event) {
+		switch (event.keyCode) {
 			case 13: // Enter
-				this._onEnterPress(e);
+				this.onEnterPress(event);
 				break;
 			case 27: // Esc
 				window.close();
@@ -168,7 +189,7 @@ var App = {
 		}
 	},
 
-	_onEnterPress: function(event) {
+	onEnterPress: function(event) {
 		var target = event.target || event.srcElement;
 
 		if (target && target.id == 'user' && this.$('password').value == '') {
@@ -176,17 +197,15 @@ var App = {
 			return;
 		}
 
-		this._onEnterClick();
+		this.onEnterClick();
 	},
 	
-	_onEnterClick: function() {
+	onEnterClick: function() {
-		this._disableUi(true, _('Loading'));
+		this.disableUi(true, _('Loading'));
-		setTimeout(function() {App._login();}, 0);
+		setTimeout(function() {App.login();}, 0);
 	},
 
-	_login: function() {
+	login: function() {
-		var clearPassword;
-
 		try {
 			var user = this.$('user').value;
 			var password = this.$('password').value;
@@ -199,38 +218,60 @@ var App = {
 			this.regWrite(Conf.dsPath, 'UID', user, 'REG_SZ');
 			this.regWrite(Conf.dsPath, 'PWD', password, 'REG_SZ');
 
+			if (this.hasToUpdate()) {
+				this.disableUi(true, _('Updating'));
+	
+				var queryString = lastVersion
+					? 'v'+ lastVersion
+					: new Date().getTime();
+	
+				var request = new ActiveXObject('MSXML2.XMLHTTP');
+				request.open('GET', this.remoteFile +'?'+ queryString, true);
+				request.onreadystatechange = function() {
+					App.onRequestReady(request);
+				};
+				request.send();
+			} else
+				this.openMdb();
+		} catch (err) {
+			this.catchError(err);
+		}
+	},
+
+	hasToUpdate: function() {
 		// Gets the last version number using the MySQL ODBC connection
 		
 		var mysqlConn = new ActiveXObject('ADODB.Connection');
 
 		try {
 			mysqlConn.open(Conf.dsName);
-			} catch (e) {
+		} catch (err) {
 			var dbErrors = mysqlConn.errors;
 
 			if (dbErrors.count > 0) {
-					var errorMsg;
+				var newErr;
 				var dbError = dbErrors.item(0);
 
 				switch (dbError.NativeError) {
 					case 1045: // Access denied
 						clearPassword = true;
-							errorMsg = _('Bad login');
+						newErr = new Error(_('Bad login'));
+						newErr.code = 'BadLogin';
 						break;
 					case 2003: // Can't connect
-							errorMsg = _('Server can\'t be reached');
+						newErr = new Error(_('Server can\'t be reached'));
 						break;
 					default:
 						errorMsg = dbError.description;
 				}
 
 				dbErrors.clear();				
-					throw new Error(errorMsg);
+				throw newErr;
 			} else
-					throw e;
+				throw err;
 		}
 	
-			var sql = 'SELECT version FROM versiones WHERE programa = \''+ this.module +'\'';
+		var sql = "SELECT version FROM versiones WHERE programa = '"+ this.module +"'";
 		var rs = mysqlConn.execute(sql);
 
 		var lastVersion = rs.EOF ? 0 : parseInt(rs.fields(0).value);
@@ -238,11 +279,33 @@ var App = {
 		rs.close();
 		mysqlConn.close();
 
+		// Checks if the MDB exists
+
+		if (!this.fso.fileExists(this.mdbFile))
+			return true;
+
+		// Checks wether the MDB it's already open
+
+		if (this.fso.fileExists(this.lockFile))
+		try {
+			this.fso.deleteFile(this.lockFile);
+			return true;
+		} catch (e) {
+			throw new Error(_('Application it\'s already open'));
+		}
+
+		// Checks wether the MDB is abnormaly bigger so maybe it's corrupted
+
+		var file = this.fso.getFile(this.mdbFile);
+		
+		if (file.size > Conf.maxSize * 1024 * 1024)
+			return true;
+
 		// Obtains the local version number from the MDB file
 
 		var localVersion = -1;
 		
-			if (this.fso.fileExists(this.mdbFile))
+		if (this.fso.fileExists(this.mdbFile) && !forcedlyClosed)
 		try {
 			var mdbConn = new ActiveXObject('ADODB.Connection');
 			mdbConn.open('Provider=Microsoft.Jet.OLEDB.4.0; Data Source='+ this.mdbFile +';');
@@ -255,30 +318,12 @@ var App = {
 			mdbConn.close();
 		} catch (e) {}
 		
-			// Compares the local version with the las version
+		// Compares the local version with the last version
 
-			if (localVersion < lastVersion) {
+		return localVersion < lastVersion;
-				this._disableUi(true, _('Updating'));
-
-				var queryString = lastVersion
-					? 'v'+ lastVersion
-					: new Date().getTime();
-
-				var request = new ActiveXObject('MSXML2.XMLHTTP');
-				request.open('GET', this.remoteFile +'?'+ queryString, true);
-				request.onreadystatechange = function() {
-					App._onRequestReady(request);
-				};
-				request.send();
-			} else
-				this.openMdb();
-		} catch (e) {
-			this._catchError(e, clearPassword);
-		}
 	},
 	
-	_onRequestReady: function(request)
+	onRequestReady: function(request) {
-	{
 		if (request.readyState !== 4)
 			return;
 		
@@ -312,7 +357,7 @@ var App = {
 
 			this.openMdb();
 		} catch (e) {
-			this._catchError(e);
+			this.catchError(e);
 		}
 	},
 	
@@ -330,12 +375,14 @@ var App = {
 		window.close();
 	},
 	
-	_catchError: function(error, clearPassword) {
+	catchError: function(err) {
+		var clearPassword = err.code == 'BadLogin';
+
 		if (!this.$('remember').checked || clearPassword)
 			this.regWrite(Conf.dsPath, 'PWD', '', 'REG_SZ');
 
-		this._disableUi(false);
+		this.disableUi(false);
-		this.showMessage(error.message);
+		this.showMessage(err.message);
 		this.resetForm(clearPassword);
 	},
 	
@@ -346,14 +393,14 @@ var App = {
 		var messageDiv = this.$('message');
 		messageDiv.innerHTML = message;
 		messageDiv.style.display = 'block';
-		this.messageTimeout = setTimeout(function() {App._hideMessage();}, 10000);
+		this.messageTimeout = setTimeout(function() {App.hideMessage();}, 10000);
 	},
 	
-	_onBodyClick: function() {
+	onBodyClick: function() {
-		this._hideMessage();
+		this.hideMessage();
 	},
 	
-	_hideMessage: function() {
+	hideMessage: function() {
 		if (this.messageTimeout) {
 			this.$('message').style.display = 'none';
 			clearTimeout(this.messageTimeout);
@@ -361,8 +408,8 @@ var App = {
 		}
 	},
 	
-	_onUnload: function() {
+	onUnload: function() {
-		this._disableUi(false);
+		this.disableUi(false);
 	},
 	
 	$: function(id) {

src/style.css

@@ -46,7 +46,8 @@ input[type='password'] {
 	margin-top: .5em;
 }
 #checkbox,
-#submit {
+#submit,
+#clean {
 	text-align: center;
 }
 button {

src/vn-access.hta

@@ -22,10 +22,10 @@
 		windowsstate="normal"/>
 </head>
 <body
-	onload="App._onLoad(event)"
+	onload="App.onLoad(event)"
-	onunload="App._onUnload(event)"
+	onunload="App.onUnload(event)"
-	onkeypress="App._onKeyPress(event)"
+	onkeypress="App.onKeyPress(event)"
-	onclick="App._onBodyClick(event)">
+	onclick="App.onBodyClick(event)">
 	<img
 		id="logo"
 		src="verdnatura.png"
@@ -42,15 +42,21 @@
 	</div>
 	<div id="checkbox">
 		<input id="remember" type="checkbox"/>
-		<label for="remember">Recuerdame</label>
+		<label for="remember">Recu&eacute;rdame</label>
 	</div>
 	<div id="submit">
 		<button
 			id="enter"
-			onclick="App._onEnterClick(event)">
+			onclick="App.onEnterClick()">
 			Entrar
 		</button>
 	</div>
+	<div id="clean">
+		<a
+			onclick="App.onCleanCacheClick()">
+			Limpiar cach&eacute;
+		</a>
+	</div>
 	<div id="background">
 	</div>
 	<div id="spinner">