5 files changed, 755 insertions, 467 deletions
diff --git a/demos/quickstart/protected/pages/Advanced/Scripts1.page b/demos/quickstart/protected/pages/Advanced/Scripts1.page
index ef0b6317..7079582a 100644
--- a/demos/quickstart/protected/pages/Advanced/Scripts1.page
+++ b/demos/quickstart/protected/pages/Advanced/Scripts1.page
@@ -93,469 +93,4 @@ function test3()
 </script>
 </com:TTextHighlighter>
 
-<h2 id="6606">Using the <tt>$A()</tt> function</h2>
-
-<p>
-    The <tt>$A()</tt> function converts the single argument it receives
-    into an <tt>Array</tt> object.
-</p>
-<p>
-    This function, combined with the extensions for the Array class,
-    makes it easier to convert or copy any enumerable list into an
-    <tt>Array</tt> object. One suggested use is to convert DOM
-    <tt>NodeLists</tt> into regular arrays, which can be traversed
-    more efficiently. See example below.
-</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-<select id="lstEmployees" size="10" >
-    <option value="5">Buchanan, Steven</option>
-    <option value="8">Callahan, Laura</option>
-    <option value="1">Davolio, Nancy</option>
-</select>
-
-<input type="button" value="Show the options" onclick="showOptions();" />
-
-<script type="text/javascript">
-/*<![CDATA[*/
-function showOptions()
-{
-    var someNodeList = $('lstEmployees').options;
-    var nodes = $A(someNodeList);
-
-    nodes.each(function(node)
-    {
-        alert(node.nodeName + ': ' + node.innerHTML);
-    });
-}
-/*]]>*/
-</script>
-</com:TTextHighlighter>
-
-<h2 id="6607">Using the <tt>$H()</tt> function</h2>
-<p>
-    The <tt>$H()</tt> function converts
-    objects into enumerable Hash objects that
-    resemble associative arrays.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-function testHash()
-{
-    //let's create the object
-    var a =
-    {
-        first: 10,
-        second: 20,
-        third: 30
-    };
-
-    //now transform it into a hash
-    var h = $H(a);
-    alert(h.toQueryString());
-
-    //displays: first=10&amp;second=20&amp;third=30
-}
-</com:TTextHighlighter>
-
-<h2 id="6608">Enumerating... Wow! Damn! Wahoo!</h2>
-<p>
-    We are all familiar with for-loops. You know, create yourself an array, populate it with
-    elements of the same kind, create a loop control structure (for, foreach, while, repeat, etc,)
-    access each element sequentially, by its numeric index, and do something with the element.
-</p>
-<p>
-    When you come to think about it, almost every time you have an array in your code it
-    means that you'll be using that array in a loop sooner or later. Wouldn't it be nice
-    if the array objects had more functionality to deal with these iterations? Yes, it would,
-    and many programming languages provide such functionality in their arrays or equivalent
-    structures (like collections and lists.)
-</p>
-
-<p>
-    Well, it turns out that prototype.js gives us the Enumerable
-    object, which implements a plethora of tricks for us to use when dealing with iterable data.
-    The prototype.js library goes one step further and extends the
-    <tt>Array</tt> class  with all the methods of <tt>Enumerable</tt>.
-</p>
-
-<a name="Loops"></a>
-<h3 id="6617">Loops and iterator</h3>
-<p>
-    In standard javascript, if you wanted to sequentially display the elements of an array,
-    you could very well write something like this.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-<script type="text/javascript">
-/*<![CDATA[*/
-function showList()
-{
-    var simpsons = ['Homer', 'Marge', 'Lisa', 'Bart', 'Meg'];
-    for(i=0; i < simpsons.length; i++)
-    {
-        alert(simpsons[i]);
-    }
-}
-/*]]>*/
-</script>
-
-<input type="button" value="Show List" onclick="showList();" />
-</com:TTextHighlighter>
-<p>
-    With our new best friend, prototype.js, we can rewrite this loop like this.
-</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-function showList()
-{
-    var simpsons = ['Homer', 'Marge', 'Lisa', 'Bart', 'Meg'];
-    simpsons.each( function(familyMember)
-    {
-        alert(familyMember);
-    });
-}
-</com:TTextHighlighter>
-<p>
-    You are probably thinking "big freaking deal...just a weird syntax for the same old thing."
-    Well, in the above example, yes, there's nothing too earth shattering going on. After all,
-    there's not much to be changed in such a drop-dead-simple example. But
-    keep reading, nonetheless.
-</p>
-<p>
-    Before we move on. Do you see this function that is being passed as an argument
-    to the <tt>each</tt> method? Let's start referring to it as an
-    <b>iterator</b> function.
-</p>
-
-<h3 id="6618">Your arrays on steroids</h3>
-
-<p>
-    Like we mentioned above, it's very common for all the elements in your array to be of
-    the same kind, with the same properties and methods. Let's see how we can take advantage
-    of iterator functions with our new souped-up arrays.
-</p>
-<p>
-    Finding an element according to a criteria.
-<p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-<script type="text/javascript">
-/*<![CDATA[*/
-function findEmployeeById(emp_id)
-{
-    var listBox = $('lstEmployees')
-    var options = $A(listBox.options);
-    var opt = options.find( function(employee)
-    {
-        return (employee.value == emp_id);
-    });
-
-    alert(opt.innerHTML); //displays the employee name
-}
-/*]]>*/
-</script>
-
-<select id="lstEmployees" size="10" >
-    <option value="5">Buchanan, Steven</option>
-    <option value="8">Callahan, Laura</option>
-    <option value="1">Davolio, Nancy</option>
-</select>
-
-<input type="button" value="Find Laura" onclick="findEmployeeById(8);" />
-</com:TTextHighlighter>
-
-<p>
-    Now let's kick it up another notch. See how we can filter out
-    items in arrays, then retrieve just a desired member from each
-    element.
-<p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-<script type="text/javascript">
-/*<![CDATA[*/
-function showLocalLinks(paragraph)
-{
-    paragraph = $(paragraph);
-    var links = $A(paragraph.getElementsByTagName('a'));
-
-    //find links that do not start with 'http'
-    var localLinks = links.findAll( function(link)
-    {
-        var start = link.href.substring(0,4);
-        return start !='http';
-    });
-
-    //now the link texts
-    var texts = localLinks.pluck('innerHTML');
-
-    //get them in a single string
-    var result = texts.inspect();
-    alert(result);
-}
-/*]]>*/
-</script>
-
-<p id="someText">
-    This &lt;a href="http://othersite.com/page.html"&gt;text&lt;/a&gt; has
-    a &lt;a href="#localAnchor"&gt;lot&lt;/a&gt; of
-    &lt;a href="#otherAnchor"&gt;links&lt;/a&gt;. Some are
-    &lt;a href="http://wherever.com/page.html"&gt;external&lt;/a&gt;
-    and some are &lt;a href="#someAnchor"&gt;local&lt;/a&gt;
-</p>
-<input type=button value="Find Local Links"
-        onclick="showLocalLinks('someText')" />
-</com:TTextHighlighter>
-<p>
-    It takes just a little bit of practice to get completely addicted to this syntax.
-    Next we will go through the available functions with the following example.
-</p>
-<h1 id="6602">Enumerable Functions</h1>
-The sample data for the following examples.
-<com:TTextHighlighter Language="javascript" CssClass="source">
-var Fixtures =
-{
-    Products:
-    [
-        {name: 'Basecamp', company: '37signals',  type: 'Project Management'},
-        {name: 'Shopify',  company: 'JadedPixel', type: 'E-Commerce'},
-        {name: 'Mint',     company: 'Shaun Inman',type: 'Statistics'}
-    ],
-
-    Artist:
-    [
-        'As I Lay Dying',
-        '36 Crazyfist',
-        'Shadows Fall',
-        'Trivium',
-        'In Flames'
-    ],
-
-    Numbers:  [0, 1, 4, 5, 98, 32, 12, 9]
-};
-
-var F = Fixtures;
-</com:TTextHighlighter>
-
-<h2 id="6609"><tt>Enumerable.each</tt> function</h2>
-<p>I used to find myself writing a lot of for loops. Although,
-Prototype does not by any means eliminate the need to do for-loops,
-it does give you access to what I consider to be a cleaner, easier to read method in each.
-<com:TTextHighlighter Language="javascript" CssClass="source">
-for(var i = 0; i < F.Numbers.length; i++)
-{
-    Logger.info(F.Numbers[i]);
-}
-</com:TTextHighlighter>
-<p>
-The <tt>each</tt> function allows us to iterate over these objects Ruby style.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-F.Numbers.each(function(num)
-{
-    Logger.info(num);
-});
-
-//Output
-0
-1
-4
-5
-98
-32
-12
-9
-</com:TTextHighlighter>
-
-<p>The <tt>each</tt> function takes one argument, an <b>iterator</b> function.
-This iterator is invoked once for every item in the array, and that item
-along with the optional index is passed to the iterator. So if
-we also needed the index we could do something like the code below.
-</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-F.Numbers.each(function(num, index)
-{
-    Logger.info(index + ": " + num);
-});
-
-//Output
-0: 0
-1: 1
-2: 4
-3: 5
-4: 98
-5: 32
-6: 12
-7: 9
-</com:TTextHighlighter>
-
-<h2 id="6610">Hash key/value pairs</h2>
-<p>Hashes can be created by wrapping an Object (associative array) in
-<tt>$H()</tt> and can have their key/value pairs exposed.</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-$H(F.Products[0]).each(function(product)
-{
-    Logger.info(product.key + ": " + product.value);
-});
-
-//Outputs
-name: Basecamp
-company: 37signals
-type: Project Management
-</com:TTextHighlighter>
-<p>
-We can also directly access the keys and values of a Hash without iterating over it.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-$H(F.Products[1]).keys();
-//Outputs name,company,type
-
-$H(F.Products[1]).values();
-//Outputs Shopify,JadedPixel,E-Commerce
-</com:TTextHighlighter>
-
-<h2 id="6611"><tt>Enumerable.collect</tt> function</h2>
-
-<p>The <tt>collect</tt> function allows you to iterate over an <tt>Array</tt> and return the
-results as a new array. Each item returned as a result of the iteration will be
-pushed onto the end of the new array.</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-var companies = F.Products.collect(function(product)
-{
-    return product.company;
-});
-
-Logger.info(companies.join(', '));
-
-// Outputs
-// 37signals, JadedPixel, Shaun Inman
-</com:TTextHighlighter>
-
-<p>You can even join on the end of the block.</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-return F.Products.collect(function(product)
-{
-    return product.company;
-}).join(', ');
-</com:TTextHighlighter>
-
-<h2 id="6612"><tt>Enumerable.include</tt> function</h2>
-
-<p>The <tt>include</tt> function allows you to check if a value is included in an array
-and returns true or false depending on if a match was made. Assuming I put
-up a form asking the user to name some artist in my iTunes playlist,
-we could do something like the code below. Prime candidate for some conditional madness.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-return F.Artists.include('Britney Spears'); // returns false
-</com:TTextHighlighter>
-
-<h2 id="6613"><tt>Enumerable.inject</tt> function</h2>
-
-<p>The <tt>inject</tt> function is good for getting a collective sum from an array of
-values. For instance, to add up all the numbers.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-var score = F.Numbers.inject(0, function(sum, value)
-{
-    return sum + value;
-});
-
-Logger.info(score);
-//Output 161
-</com:TTextHighlighter>
-
-<p>The first argument to <tt>inject</tt> is just an initial value that
-would be added to the sum, so if we added 1 instead of 0, the output would be 162.</p>
-
-<h2 id="6614"><tt>Enumerable.findAll</tt> function</h2>
-<p>
-When given an Array, the <tt>findAll</tt> function will return an array of
-items for which the iterator evaluated to true. Basically, it allows you to
-build a new array of values based on some search criteria.
-If we wanted to find all products whose type was “E-Commerce”
-we could do something like the code below.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-var ecom = F.Products.findAll(function(product)
-{
-    return product.type == 'E-Commerce';
-});
-
-Logger.info(ecom[0].company + " produces " + ecom[0].name);
-
-//Outputs
-JadedPixel produces Shopify
-</com:TTextHighlighter>
-
-<p>Note that even if only one match is made, just as in this case,
-the result is still returned as an array. In that case,
-<tt>ecom.company</tt> would return <tt>undefined</tt>.</p>
-
-<h2 id="6615"><tt>Enumerable.detect</tt> function</h2>
-<p>Unlike the <tt>findAll</tt> function, the <tt>detect</tt> function will only
-return the first item for which the expression inside
-the iterator is true. So, if we wanted to find the first number that
-was greater than 5 we’d do something like the code below.
-</p>
-<com:TTextHighlighter Language="javascript" CssClass="source">
-var low = F.Numbers.detect(function(num)
-{
-    return num > 5
-});
-
-Logger.info(low);
-//Outputs 98
-</com:TTextHighlighter>
-
-<p>Even though, there are other numbers above 5 in our array, detect
-only gives us the first match back.</p>
-
-<h2 id="6616"><tt>Enumerable.invoke</tt> function</h2>
-
-<p>The <tt>invoke</tt> function allows us to pass a method as a string and
-have that method invoked. For instance, if we wanted to sort
-our array of artists we’d do something like this:</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-[F.Artists].invoke('sort')
-//Outputs 36 Crazyfist,As I Lay Dying,In Flames,Shadows Fall,Trivium
-</com:TTextHighlighter>
-
-<p>Why not just use <tt>F.Artists.sort</tt>? Well, for the example above
-we could do just that, but here is where <tt>invoke</tt> shines.</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-[F.Artists, F.Letters].invoke('sort');
-//Outputs 36 Crazyfist,As I Lay Dying,In Flames,...
-</com:TTextHighlighter>
-<p>So we invoked sort for each sub-array. Note that the code below will not work.</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-F.Artists.invoke('sort');
-</com:TTextHighlighter>
-
-<p>The reason this will not work is because it is taking each item
-in that array and trying to apply sort to it, thus if we wrote it outright,
-it would look something like this:</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-"36 Crazy Fists".sort();
-</com:TTextHighlighter>
-<p>We could however do something like this:</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-F.Artists.invoke('toLowerCase');
-//Outputs 36 crazyfist,as i lay dying,in flames,shadows ...
-</com:TTextHighlighter>
-
-<p>
-Now, what about passing arguments to the <tt>invoke</tt> function?
-The first argument passed to <tt>invoke</tt> is the method to be invoked,
-and any other arguments beyond that will be passed as arguments to the invoked method.</p>
-
-<com:TTextHighlighter Language="javascript" CssClass="source">
-F.Artists.invoke('concat', " is awesome ")
-//Outputs
-36 Crazyfist is awesome ,As I Lay Dying is awesome ,...
-</com:TTextHighlighter>
-
 </com:TContent>
 \ No newline at end of file
diff --git a/demos/quickstart/protected/pages/Tutorial/AjaxChat.page b/demos/quickstart/protected/pages/Tutorial/AjaxChat.page
new file mode 100644
index 00000000..3a17b5d4
--- /dev/null
+++ b/demos/quickstart/protected/pages/Tutorial/AjaxChat.page
@@ -0,0 +1,753 @@
+<com:TContent ID="body">
+	<h1>Building an AJAX Chat Application</h1>
+	<p>This tutorial introduces the Prado web application framework's 
+	<a href="?page=Database.ActiveRecord">ActiveRecord</a>
+	and <a href="?page=ActiveControls.Home">Active Controls</a> to build a Chat 
+	web application . It is assumed that you 
+	are familiar with PHP and you have access to a web server that is able to serve PHP5 scripts.
+	This basic chat application will utilizing the following ideas/components in Prado.
+	<ul>
+		<li>Building a custom User Manager class.</li>
+		<li>Authenticating and adding a new user to the database.</li>
+		<li>Using ActiveRecord to interact with the database.</li>
+		<li>Using Active Controls and callbacks to implement the user interface.</li>
+		<li>Separating application logic and application flow.</li>
+	</ul>
+	</p> 
+
+	<p>In this tutorial you will build an AJAX Chat web application that allows
+		multiple users to communicate through their web browser. 
+		The application consists of two pages: a login page
+		that asks the user to enter their nickname and the main application chat
+		page.
+		You can try the application <a href="../chat/index.php">locally</a> or at  
+		<a href="http://www.pradosoft.com/demos/chat/">Pradosoft.com</a>.
+		The main application chat page is shown bellow. 
+		<img src=<%~ chat1.png %> class="figure" />
+	</p>
+
+	<h1>Download, Install and Create a New Application</h1>
+	<p>The download and installation steps are similar to those in 
+	the <a href="?page=Tutorial.CurrencyConverter#download">Currency converter tutorial</a>.
+	To create the application, we run from the command line the following.
+	See the <a href="?page=GettingStarted.CommandLine">Command Line Tool</a> 
+		for more details.
+<com:TTextHighlighter Language="text" CssClass="source">
+php prado/framework/prado-cli.php -c chat
+</com:TTextHighlighter> 
+	</p>
+
+	<p>The above command creates the necessary directory structure and minimal 
+		files (including "index.php" and "Home.page") to run a Prado  web application.
+		Now you can point your browser's url to the web server to serve up
+		the <tt>index.php</tt> script in the <tt>chat</tt> directory.
+		You should see the message "Welcome to Prado!" 
+	</p>
+
+	<h1>Authentication and Authorization</h1>
+	<p>The first task for this application is to ensure that each user
+	of the chat application is assigned with a unique (choosen by the user) 
+	username. To achieve this, we can secure the main chat application
+	page to deny access to anonymouse users. First, let us create the <tt>Login</tt>
+	page with the following code. We save the <tt>Login.php</tt> and <tt>Login.page</tt>
+	in the <tt>chat/protected/pages/</tt> directory (there should be a <tt>Home.page</tt>
+	file there create by the command line tool).
+	</p>
+<com:TTextHighlighter Language="php" CssClass="source">
+&lt;?php
+class Login extends TPage
+{
+}
+?&gt;
+</com:TTextHighlighter>
+<com:TTextHighlighter Language="prado" CssClass="source">
+<!doctype html public "-//W3C//DTD XHTML 1.0 Strict//EN" 
+    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+    <title>Prado Chat Demo Login</title>
+</head>
+<body>
+&lt;com:TForm&gt;
+    <h1 class="login">Prado Chat Demo Login</h1>
+    <fieldset class="login">
+        <legend>Please enter your name:</legend>
+        <div class="username">
+            &lt;com:TLabel ForControl="username" Text="Username:" /&gt;
+            &lt;com:TTextBox ID="username" MaxLength="20" /&gt;
+            &lt;com:TRequiredFieldValidator
+                ControlToValidate="username"
+                Display="Dynamic"
+                ErrorMessage="Please provide a username." /&gt;
+        </div>
+        <div class="login-button">
+            &lt;com:TButton Text="Login" /&gt;
+        </div>
+&lt;/com:TForm&gt;
+</body>
+</html>
+</com:TTextHighlighter>
+	<p>The login page contains 
+	a <com:DocLink ClassPath="System.Web.UI.WebControls.TForm" Text="TForm" />,
+	a <com:DocLink ClassPath="System.Web.UI.WebControls.TTextBox" Text="TTextBox" />,
+	a <com:DocLink ClassPath="System.Web.UI.WebControls.TRequiredFieldValidator" Text="TRequiredFieldValidator" />
+	and a <com:DocLink ClassPath="System.Web.UI.WebControls.TButton" Text="TButton" />. The resulting
+	page looks like the following (after applying some a style sheet).
+	<img src=<%~ chat2.png %> class="figure" />
+	If you click on the <tt>Login</tt> button without entering any
+	text in the username textbox, an error message is displayed. This is
+	due to the <com:DocLink ClassPath="System.Web.UI.WebControls.TRequiredFieldValidator" Text="TRequiredFieldValidator" />
+	requiring the user to enter some text in the textbox before proceeding.
+	</p>
+<h2>Securing the <tt>Home</tt> page</h2>
+<p>Now we wish that if the user is trying to access the main application
+page, <tt>Home.page</tt>, before they have logged in, the user is presented with
+the <tt>Login.page</tt> first. We add a <tt>chat/protected/application.xml</tt> configuration
+file to import some classes that we shall use later.
+<com:TTextHighlighter Language="xml" CssClass="source">
+<?xml version="1.0" encoding="utf-8"?>
+<application id="Chat" Mode="Debug">
+  <paths>
+    <using namespace="System.Data.*" />
+    <using namespace="System.Data.ActiveRecord.*" />
+    <using namespace="System.Security.*" />
+    <using namespace="System.Web.UI.ActiveControls.*" />
+  </paths>
+</application>
+</com:TTextHighlighter>
+Next, we add a <tt>chat/protected/pages/config.xml</tt> configuration file to
+secure the <tt>pages</tt> directory.
+<com:TTextHighlighter Language="xml" CssClass="source">
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <modules>
+    <module id="users" class="TUserManager" />
+    <module id="auth" class="TAuthManager" UserManager="users" LoginPage="Login" />
+  </modules>
+  <authorization>
+    <allow pages="Login" users="?" />
+    <allow roles="normal" />
+    <deny users="*" />
+  </authorization>
+</configuration>
+</com:TTextHighlighter>
+We setup the authentication using the default classes as explained in the 
+<a href="?page=Advanced.Auth">authentication/authorization quickstart</a>.
+In the authorization definition, we allow anonymouse users to access the 
+<tt>Login</tt> page (anonymouse users is specified by the <tt>?</tt> question mark).
+We allow any users with role equal to "normal" (to be defined later) 
+to access all the pages, that is, the <tt>Login</tt> and <tt>Home</tt> pages.
+Lastly, we deny all users without any roles to access any page. The authorization
+rules are executed on first match basis.
+</p>
+
+<p>If you now try to access the <tt>Home</tt> page by pointing your browser
+to the <tt>index.php</tt> you will be redirected to the <tt>Login</tt> page.
+</p>
+
+<h1>Active Record for <tt>chat_users</tt> table</h1>
+<p>The <com:DocLink ClassPath="System.Secutity.TUserManager" Text="TUserManager" />
+class only provides a read-only list of users. We need to be able to add or
+login new users dynamically. So we need to create our own user manager class.
+First, we shall setup a database with a <tt>chat_users</tt> table and create an ActiveRecord 
+that can work with the <tt>chat_users</tt> table with ease. For the demo, we
+use <tt>sqlite</tt> as our database for ease of distributing the demo. The demo
+can be extended to use other databases such as MySQL or Postgres SQL easily.
+We define the <tt>chat_users</tt> table as follows.
+<com:TTextHighlighter Language="text" CssClass="source">
+CREATE TABLE chat_users 
+( 
+	username VARCHAR(20) NOT NULL PRIMARY KEY, 
+	last_activity INTEGER NOT NULL DEFAULT "0" 
+);
+</com:TTextHighlighter>
+Next we define the corresponding <tt>ChatUserRecord</tt> class and save it as
+<tt>chat/protected/App_Code/ChatUserRecord.php</tt> (you need to create the
+<tt>App_Code</tt> directory as well). We also save the sqlite database file
+as <tt>App_Code/chat.db</tt>.
+<com:TTextHighlighter Language="php" CssClass="source">
+class ChatUserRecord extends TActiveRecord
+{
+    public $username;
+    public $last_activity;
+
+    public static $_tablename='chat_users';
+
+    public static function finder()
+    {
+        return parent::getRecordFinder('ChatUserRecord');
+    }
+}
+</com:TTextHighlighter>
+Before using the <tt>ChatUserRecord</tt> class we to configure a default
+database connection for ActiveRecord to function. In the <tt>chat/protected/application.xml</tt>
+we import classes from the <tt>App_Code</tt> directory and add an 
+<a href="?page=Database.ActiveRecord">ActiveRecord configuration module</a>.
+<com:TTextHighlighter Language="xml" CssClass="source">
+<?xml version="1.0" encoding="utf-8"?>
+<application id="Chat" Mode="Debug">
+  <paths>
+    <using namespace="Application.App_Code.*" />
+    <using namespace="System.Data.*" />
+    <using namespace="System.Data.ActiveRecord.*" />
+    <using namespace="System.Security.*" />
+    <using namespace="System.Web.UI.ActiveControls.*" />
+  </paths>
+  <modules>
+    <module class="TActiveRecordConfig" EnableCache="true"
+        Database.ConnectionString="sqlite:protected/App_Code/chat.db" />
+  </modules>
+</application>
+</com:TTextHighlighter>
+</p>
+
+<h2>Custom User Manager class</h2>
+<p>To implement a custom user manager module class we just need
+to extends the <tt>TModule</tt> class and implement the <tt>IUserManager</tt>
+interface. The <tt>getGuestName()</tt>, <tt>getUser()</tt> and <tt>validateUser</tt>
+methods are required by the <tt>IUserManager</tt> interface.
+We save the custom user manager class as <tt>App_Code/ChatUserManager.php</tt>.
+</p> 
+<com:TTextHighlighter Language="php" CssClass="source">
+class ChatUserManager extends TModule implements IUserManager
+{
+    public function getGuestName()
+    {
+        return 'Guest';
+    }
+
+    public function getUser($username=null)
+    {
+        $user=new TUser($this);
+        $user->setIsGuest(true);        
+        if($username !== null && $this->usernameExists($username))
+        {
+            $user->setIsGuest(false);
+            $user->setName($username);
+            $user->setRoles(array('normal'));
+        }
+        return $user;
+    }
+    
+    public function addNewUser($username)
+    {
+        $user = new ChatUserRecord();
+        $user->username = $username;
+        $user->save();
+    }
+
+    public function usernameExists($username)
+    {
+        $finder = ChatUserRecord::finder();
+        $record = $finder->findByUsername($username);
+        return $record instanceof ChatUserRecord;
+    }
+
+    public function validateUser($username,$password)
+    {
+        return $this->usernameExists($username);
+    }
+}
+</com:TTextHighlighter>
+<p>
+The <tt>getGuestName()</tt>
+method simply returns the name for a guest user and is not used in our application.
+The <tt>getUser()</tt> method returns a <tt>TUser</tt> object if the username
+exists in the database, the <tt>TUser</tt> object is set with role of "normal"
+that corresponds to the <tt>&lt;authorization&gt;</tt> rules defined in our
+<tt>config.xml</tt> file. </p>
+
+<p>The <tt>addNewUser()</tt> and <tt>usernameExists()</tt>
+method uses the ActiveRecord corresponding to the <tt>chat_users</tt> table to 
+add a new user and to check if a username already exists, respectively.
+</p>
+
+<p>The next thing to do is change the <tt>config.xml</tt> configuration to use
+our new custom user manager class. We simply change the <tt>&lt;module&gt;</tt>
+configuration with <tt>id="users"</tt>.</p>
+<com:TTextHighlighter Language="xml" CssClass="source">
+<module id="users" class="ChatUserManager" />
+</com:TTextHighlighter>
+
+<h1>Authentication</h1>
+<p>To perform authentication, we just want the user to enter a unique
+username. We add a 
+<com:DocLink ClassPath="System.Web.UI.WebControls.TCustomValidator" Text="TCustomValidator" />
+for validate the uniqueness of the username and add a <tt>OnClick</tt> event handler
+for the login button.</p>
+<com:TTextHighlighter Language="prado" CssClass="source">
+&lt;com:TCustomValidator
+    ControlToValidate="username"
+    Display="Dynamic"
+    OnServerValidate="checkUsername"
+    ErrorMessage="The username is already taken." /&gt;
+
+...
+
+&lt;com:TButton Text="Login" OnClick="createNewUser" /&gt;
+</com:TTextHighlighter>
+In the <tt>Login.php</tt> file, we add the following 2 methods.
+<com:TTextHighlighter Language="php" CssClass="source">
+function checkUsername($sender, $param)
+{
+    $manager = $this->Application->Modules['users'];
+    if($manager->usernameExists($this->username->Text))
+        $param->IsValid = false;
+}
+
+function createNewUser($sender, $param)
+{
+    if($this->Page->IsValid)
+    {
+        $manager = $this->Application->Modules['users'];
+        $manager->addNewUser($this->username->Text);
+        
+        //do manual login
+        $user = $manager->getUser($this->username->Text);
+        $auth = $this->Application->Modules['auth'];
+        $auth->updateSessionUser($user);
+        $this->Application->User = $user;
+
+        $url = $this->Service->constructUrl($this->Service->DefaultPage);
+        $this->Response->redirect($url);
+    }
+}
+</com:TTextHighlighter>
+The <tt>checkUserName()</tt> method uses the <tt>ChatUserManager</tt> class
+(recall that in the <tt>config.xml</tt> configuration we set the 
+ID of the custom user manager class as "users") to validate the username
+is not taken.
+</p>
+<p>
+In the <tt>createNewUser</tt> method, when the validation passes (that is, 
+when the user name is not taken) we add a new user. Afterward we perform
+a manual login process: 
+<ul>
+	<li>First we obtain a <tt>TUser</tt> instance from
+our custom user manager class using the <tt>$manager->getUser(...)</tt> method.</li>
+	<li>Using the <tt>TAuthManager</tt> we set/update the user object in the
+	current session data.</li>
+	<li>Then we set/update the <tt>Application</tt>'s user instance with our
+	new user object.</li>
+</ul>
+Finally, we redirect the client to the default <tt>Home</tt> page.
+</p>
+
+<h2>Default Values for ActiveRecord</h2>
+<p>If you try to perform a login now, you will receive an error message like
+"<i>Property '<tt>ChatUserRecord::$last_activity</tt>' must not be null as defined 
+by column 'last_activity' in table 'chat_users'.</i>". This means that the <tt>$last_activity</tt>
+property value was null when we tried to insert a new record. We need to either
+define a default value in the corresponding column in the table and allow null values or set the default
+value in the <tt>ChatUserRecord</tt> class. We shall demonstrate the later by 
+altering the <tt>ChatUserRecord</tt> with the addition of a set getter/setter
+methods for the <tt>last_activity</tt> property.
+
+<com:TTextHighlighter Language="php" CssClass="source">
+private $_last_activity;
+
+public function getLast_Activity()
+{
+    if($this->_last_activity === null)
+        $this->_last_activity = time();
+    return $this->_last_activity;
+}
+
+public function setLast_Activity($value)
+{
+    $this->_last_activity = $value;
+}
+</com:TTextHighlighter>
+Notice that we renamed <tt>$last_activity</tt> to <tt>$_last_activity</tt> (note
+the under score after the dollar sign).
+</p>
+
+<h1>Main Chat Application</h1>
+<p>Now we are ready to build the main chat application. We use a simple
+layout that consist of one panel holding the chat messages, one panel
+to hold the users list, a textare for the user to enter the text message
+and a button to send the message.
+<com:TTextHighlighter Language="prado" CssClass="source">
+<!doctype html public "-//W3C//DTD XHTML 1.0 Strict//EN" 
+    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+    <title>Prado Chat Demo</title>
+<style>
+.messages
+{
+    width: 500px;
+    height: 300px;
+    float: left;    
+    border: 1px solid ButtonFace;
+    overflow: auto;
+}
+.user-list
+{
+    margin-left: 2px;
+    float: left;
+    width: 180px;
+    height: 300px;
+    border: 1px solid ButtonFace;
+    overflow: auto;
+    font-size: 0.85em;
+}
+.message-input
+{
+    float: left;
+}
+
+.message-input textarea
+{
+    margin-top: 3px;
+    padding: 0.4em 0.2em;           
+    width: 493px;
+    font-family: Verdana, Geneva, Arial, Helvetica, sans-serif;
+    font-size: 0.85em;
+    height: 40px;
+}
+.send-button
+{
+    margin: 0.5em;
+}
+</style>
+</head>
+<body>
+&lt;com:TForm&gt;
+<h1>Prado Chat Demo</h1>
+<div id="messages" class="messages">
+    &lt;com:TPlaceHolder ID="messageList" /&gt;
+</div>
+<div id="users" class="user-list">
+    &lt;com:TPlaceHolder ID="userList" /&gt;
+</div>
+<div class="message-input">
+    &lt;com:TActiveTextBox ID="userinput" 
+        Columns="40" Rows="2" TextMode="MultiLine" /&gt;
+    &lt;com:TActiveButton ID="sendButton" CssClass="send-button" 
+        Text="Send" /&gt;
+</div>
+&lt;/com:TForm&gt;
+&lt;com:TJavascriptLogger /&gt;
+</body>
+</html>
+</com:TTextHighlighter>
+We have add two Active Control components: a
+<com:DocLink ClassPath="System.Web.UI.ActiveControls.TActiveTextBox" Text="TActiveTextBox" />
+and a
+<com:DocLink ClassPath="System.Web.UI.ActiveControls.TActiveButton" Text="TActiveButton" />.
+We also added a 
+<com:DocLink ClassPath="System.Web.UI.WebControls.TJavascriptLogger" Text="TJavascriptLogger" />
+that will be very useful for understanding how the Active Controls work.
+</p>
+
+<h2>Exploring the Active Controls</h2>
+<p>Lets have some fun before we proceed with setuping the chat buffering. We want
+to see how we can update the current page when we receive a message. First, we add
+an <tt>OnClick</tt> event handler for the <tt>Send</tt> button.
+
+<com:TTextHighlighter Language="prado" CssClass="source">
+&lt;com:TActiveButton ID="sendButton" CssClass="send-button" 
+	Text="Send" OnClick="processMessage"/&gt;
+</com:TTextHighlighter >
+And the corresponding event handler method in the <tt>Home.php</tt> class (we
+need to create this new file too).
+<com:TTextHighlighter Language="php" CssClass="source">
+class Home extends TPage
+{
+    function processMessage($sender, $param)
+    {
+        echo $this->userinput->Text;
+    }
+}
+</com:TTextHighlighter>
+If you now type something in the main application textbox and click the send button
+you should see what ever you have typed echoed in the <tt>TJavascriptLogger</tt> console.
+</p>
+
+<p>To append or add some content to the message list panel, we need to use
+some methods in the 
+<com:DocLink ClassPath="System.Web.UI.ActiveControls.TCallbackClientScript" Text="TCallbackClientScript" />
+class which is available through the <tt>CallbackClient</tt> property of the
+current <tt>TPage</tt> object. For example, we do can do
+<com:TTextHighlighter Language="php" CssClass="source">
+function processMessage($sender, $param)
+{
+    $this->CallbackClient->appendContent("messages", $this->userinput->Text);
+}
+</com:TTextHighlighter>
+This is one way to update some part of the existing page during a callback (AJAX style events)
+and will be the primary way we will use to implement the chat application.
+</p>
+
+<h1>Active Record for <tt>chat_buffer</tt> table</h1>
+<p>To send a message to all the connected users we need to buffer or store
+the message for each user. We can use the database to buffer the messages. The
+<tt>chat_buffer</tt> table is defined as follows.
+<com:TTextHighlighter Language="text" CssClass="source">
+CREATE TABLE chat_buffer 
+( 
+	id INTEGER PRIMARY KEY, 
+	for_user VARCHAR(20) NOT NULL, 
+	from_user VARCHAR(20) NOT NULL, 
+	message TEXT NOT NULL, 
+	created_on INTEGER NOT NULL DEFAULT "0" 
+);
+</com:TTextHighlighter>
+The corresponding <tt>ChatBufferRecord</tt> class is saved as
+<tt>App_Code/ChatBufferRecord.php</tt>.
+
+<com:TTextHighlighter Language="php" CssClass="source">
+class ChatBufferRecord extends TActiveRecord
+{
+    public $id;
+    public $for_user;
+    public $from_user;
+    public $message;
+    private $_created_on;
+
+    public static $_tablename='chat_buffer';
+
+    public function getCreated_On()
+    {
+        if($this->_created_on === null)
+            $this->_created_on = time();
+        return $this->_created_on;
+    }
+
+    public function setCreated_On($value)
+    {
+        $this->_created_on = $value;
+    }
+
+    public static function finder()
+    {
+        return parent::getRecordFinder('ChatBufferRecord');
+    }
+}
+</com:TTextHighlighter>
+</p>
+
+<h1>Chat Application Logic</h1>
+<p>We finally arrive at the guts of the chat application logic. First, we
+need to save a received message into the chat buffer for <b>all</b> the
+current users. We add this logic in the <tt>ChatBufferRecord</tt> class.
+
+<com:TTextHighlighter Language="php" CssClass="source">
+public function saveMessage()
+{
+    foreach(ChatUserRecord::finder()->findAll() as $user)
+    {
+        $message = new self;
+        $message->for_user = $user->username;
+        $message->from_user = $this->from_user;
+        $message->message = $this->message;
+        $message->save();
+        if($user->username == $this->from_user)
+        {
+            $user->last_activity = time(); //update the last activity;
+            $user->save();
+        }
+    }
+}
+</com:TTextHighlighter>
+We first find all the current users using the <tt>ChatUserRecord</tt> finder
+methods. Then we duplicate the message and save it into the database. In addition,
+we update the message sender's last activity timestamp. The above piece of code
+demonstrates the simplicty and succintness of using ActiveRecords for simple database designs.
+</p>
+
+<p>The next piece of the logic is to retreive the users messages from the buffer.
+We simply load all the messages for a particular username and format that message
+appropriately (remember to escape the output to prevent Cross-Site Scripting attacks).
+After we load the messages, we delete those loaded messages and any older
+messages that may have been left in the buffer. 
+</p>
+<com:TTextHighlighter Language="php" CssClass="source">
+public function getUserMessages($user)
+{
+    $content = '';
+    foreach($this->findAll('for_user = ?', $user) as $message)
+        $content .= $this->formatMessage($message);
+    $this->deleteAll('for_user = ? OR created_on < ?', $user, time() - 300); //5 min inactivity
+    return $content;
+}
+
+protected function formatMessage($message)
+{
+    $user = htmlspecialchars($message->from_user);
+    $content = htmlspecialchars($message->message);
+    return "<div class=\"message\"><strong>{$user}:</strong> <span>{$content}</span></div>";
+}
+</com:TTextHighlighter>
+
+To retrieve a list of current users (formatted), we add this logic to the
+<tt>ChatUserRecord</tt> class. We delete any users that may have been inactive
+for awhile.
+<com:TTextHighlighter Language="php" CssClass="source">
+public function getUserList()
+{
+    $this->deleteAll('last_activity < ?', time()-300); //5 min inactivity
+    $content = '<ul>';
+    foreach($this->findAll() as $user)
+        $content .= '<li>'.htmlspecialchars($user->username).'</li>';
+    $content .= '</ul>';
+    return $content;
+}
+</com:TTextHighlighter>
+
+<div class="note"><b class="tip">Note:</b>
+For simplicity
+we formatted the messages in these Active Record classes. For large applications,
+these message formatting tasks should be done using Prado components (e.g. using
+a TRepeater in the template or a custom component).
+</div>
+</p>
+
+<h1>Putting It Together</h1>
+<p>Nows comes to put the application flow together. In the <tt>Home.php</tt> we update
+the <tt>Send</tt> buttons <tt>OnClick</tt> event handler to use the application
+logic we just implemented.
+<com:TTextHighlighter Language="php" CssClass="source">
+function processMessage($sender, $param)
+{
+    if(strlen($this->userinput->Text) > 0)
+    {
+        $record = new ChatBufferRecord();
+        $record->message = $this->userinput->Text;
+        $record->from_user = $this->Application->User->Name;
+        $record->saveMessage();
+        
+        $this->userinput->Text = '';
+        $messages = $record->getUserMessages($this->Application->User->Name);
+        $this->CallbackClient->appendContent("messages", $messages);
+        $this->CallbackClient->focus($this->userinput);
+    }
+}
+</com:TTextHighlighter>
+We simply save the message to the chat buffer and then ask for all the messages
+for the current user and update the client side message list using a callback
+response (AJAX style).
+</p>
+
+<p>At this point the application is actually already functional, just not very
+user friendly. If you open two different browser, you should be able to communicate
+between the two users when ever the <tt>Send</tt> button is clicked.
+</p>
+
+<p>The next part is perphaps the more tricker and fiddly than the other tasks. We
+need to improve the user experience. First, we want a list of current users
+as well. So we add the following method to <tt>Home.php</tt>, we can call
+this method when ever some callback event is raised, e.g. when the <tt>Send</tt>
+button is clicked.
+<com:TTextHighlighter Language="php" CssClass="source">
+protected function refreshUserList()
+{
+    $lastUpdate = $this->getViewState('userList','');
+    $users = ChatUserRecord::finder()->getUserList();
+    if($lastUpdate != $users)
+    {
+        $this->CallbackClient->update('users', $users);
+        $this->setViewstate('userList', $users);
+    }
+}
+</com:TTextHighlighter>
+</p>
+
+<p>Actually, we want to periodically update the messages and user list as new
+users join in and new message may arrive from other users. So we need to refresh
+the message list as well.</p>
+<com:TTextHighlighter Language="php" CssClass="source">
+function processMessage($sender, $param)
+{
+    ...     
+    $this->refreshUserList();
+    $this->refreshMessageList();
+    ...
+}
+
+protected function refreshMessageList()
+{
+    //refresh the message list
+    $finder = ChatBufferRecord::finder();
+    $content = $finder->getUserMessages($this->Application->User->Name);
+    if(strlen($content) > 0)
+    {
+        $anchor = (string)time();
+        $content .= "<a href=\"#\" id=\"{$anchor}\"> </a>";
+        $this->CallbackClient->appendContent("messages", $content);
+        $this->CallbackClient->focus($anchor);
+    }
+}
+</com:TTextHighlighter>
+The anchor using <tt>time()</tt> as ID for a focus point is so that when the
+message list on the client side gets very long, the focus method will 
+scroll the message list to the latest message (well, it works in most browsers).
+</p>
+
+<p>Next, we need to redirect the user back to the login page if the user has
+been inactive for some time, say about 5 mins, we can add this check to any stage
+of the page life-cycle. Lets add it to the <tt>onLoad()</tt> stage.
+<com:TTextHighlighter Language="php" CssClass="source">
+public function onLoad($param)
+{
+    $username = $this->Application->User->Name;
+    if(!$this->Application->Modules['users']->usernameExists($username))
+    {
+        $auth = $this->Application->Modules['auth'];
+        $auth->logout();
+
+        //redirect to login page.
+        $this->Response->Redirect($this->Service->ConstructUrl($auth->LoginPage));
+    }
+}
+</com:TTextHighlighter>
+</p>
+
+<h1>Improving User Experience</h1>
+<p>The last few details are to periodically check for new messages and
+refresh the user list. We can accomplish this by polling the server using a
+<com:DocLink ClassPath="System.Web.UI.ActiveControls.TTimeTriggeredCallback" Text="TTimeTriggeredCallback" />
+control. We add a <tt>TTimeTriggeredCallback</tt> to the <tt>Home.page</tt>
+and call the <tt>refresh</tt> handler method to defined in <tt>Home.php</tt>.
+We set the polling interval to 2 seconds.
+<com:TTextHighlighter Language="prado" CssClass="source">
+&lt;com:TTimeTriggeredCallback OnCallback="refresh" 
+	Interval="2" StartTimerOnLoad="true" /&gt;
+</com:TTextHighlighter>
+<com:TTextHighlighter Language="php" CssClass="source">
+function refresh($sender, $param)
+{
+    $this->refreshUserList();
+    $this->refreshMessageList();
+}
+</com:TTextHighlighter>
+</p>
+
+<p>The final piece requires us to use some javascript. We want that when the
+user type some text in the textarea and press the <tt>Enter</tt> key, we want it
+to send the message without clicking on the <tt>Send</tt> button. We add to the
+<tt>Home.page</tt> some javascript.
+
+<com:TTextHighlighter Language="javascript" CssClass="source">
+&lt;com:TClientScript&gt;
+Event.observe($("&lt;%= $this->userinput->ClientID %&gt;"), "keypress", function(ev)
+{
+    if(Event.keyCode(ev) == Event.KEY_RETURN)
+    {
+        if(Event.element(ev).value.length > 0)
+            new Prado.Callback("&lt;%= $this->sendButton->UniqueID %&gt;");
+        Event.stop(ev);
+    }
+});
+&lt;/com:TClientScript&gt;
+</com:TTextHighlighter>
+Details regarding the javascript can be explored in the 
+<a href="?page=Advanced.Scripts">Introduction to Javascript</a> section of the quickstart.
+</p>
+
+<p>This completes the tutorial on making a basic chat web application using
+the Prado framework. Hope you have enjoyed it.
+</p>
+
+</com:TContent>
+\ No newline at end of file
diff --git a/demos/quickstart/protected/pages/Tutorial/CurrencyConverter.page b/demos/quickstart/protected/pages/Tutorial/CurrencyConverter.page
index 0e54fbc2..fdce0b47 100644
--- a/demos/quickstart/protected/pages/Tutorial/CurrencyConverter.page
+++ b/demos/quickstart/protected/pages/Tutorial/CurrencyConverter.page
@@ -11,12 +11,12 @@
 		relative to the dollar. The completed application is shown bellow.
 		<img src=<%~ example2.png %> class="figure" />
 		You can try the application <a href="../currency-converter/index.php">locally</a> or at  
-		<a href="http://www.pradosoft.com/demo/currency-converter/">Pradosoft.com</a>.
+		<a href="http://www.pradosoft.com/demos/currency-converter/">Pradosoft.com</a>.
 		Notice that the application still functions exactly the same if javascript
 		is not available on the user's browser.
 	</p>
 	
-	<h1>Downloading and Installing Prado</h1>
+	<h1 id="download">Downloading and Installing Prado</h1>
 	<p>To install Prado, simply download the latest version of Prado from
 		<a href="http://www.pradosoft.com/">http://www.pradosoft.com</a>
 		and unzip the file to a directory <b>not</b> accessible by your web server 
diff --git a/demos/quickstart/protected/pages/Tutorial/chat1.png b/demos/quickstart/protected/pages/Tutorial/chat1.png
new file mode 100644
index 00000000..8288b496
--- /dev/null
+++ b/demos/quickstart/protected/pages/Tutorial/chat1.png
diff --git a/demos/quickstart/protected/pages/Tutorial/chat2.png b/demos/quickstart/protected/pages/Tutorial/chat2.png
new file mode 100644
index 00000000..97cbc51d
--- /dev/null
+++ b/demos/quickstart/protected/pages/Tutorial/chat2.png