This chapter, we'll start a simple page with MVC to show how to develop simple web application in Windwalker.

We assume you install Windwalker in http://localhost/windwalker, so you must use http://localhost/windwalker/www to open Windwalker home page.

Create First Controller

Let's create a php class in src/Flower/Controller/Sakura/GetContrtoller.php.

The Flower is package name, and Sakura is controller name, GetController means it is a default GET action, this equals to indexAction in other frameworks, while Windwalker uses single action controller, so every controller class only handles one action.

<?php
// src/Flower/Controller/Sakura/GetController.php

namespace Flower\Controller\Sakura;

use Windwalker\Core\Controller\AbstractController;

/**
 * Sakura Controller
 */
class GetController extends AbstractController
{
    protected function doExecute()
    {
        return 'Hello World';
    }
}

Now, open http://path/to/windwalker/www/flower/sakura in browser, you will see Hello World.

Windwalker Controller follows single responsibility principle, you can add more logic to a controller but won't be confused by too many different actions in one class.

Render View Template

We wish we can render a HTML template to browser, so please add a template file to src/Flower/Templates/sakura/default.php

<?php
// src/Flower/Templates/sakura/default.php
?>
<h1>Hello <?php echo $this->escape($name); ?></h1>

And modify GetController::doExecute(), we get a View object, push a variable into it, then all render() method to return template.

// src/Flower/Controller/Sakura/GetController.php

// ...

protected function doExecute()
{
    $view = $this->getView();

    $view['name'] = 'Sakura';

    return $view->render();

    // Another quick way
    return $this->renderView('Sakura', 'default', 'php', ['name' => 'Sakura']);
}

We'll get <h1>Hello Sakura</h1> in browser.

Add HTML Frame

By extends parent layout, we can wrap our template by a parent template.

<?php
// src/Flower/Templates/sakura/default.php
/**
 * @var  $this  \Windwalker\Core\Renderer\PhpRenderer
 */
?>

<?php $this->extend('_global.html') ?>

<!-- This will override parent `content` block -->
<?php $this->block('content'); ?>
    <div class="container">
        <h1>Hello <?php echo $this->escape($name); ?></h1>
    </div>
<?php $this->endblock(); ?>

The result

p-2016-07-08-001

You can find _global.html in templates/_globa/html.php, this is the global template path.

If you get Route: home not found message in DEBUG mode, just open etc/dev/config.yml and set routing.debug to false.

Change View Layout

We support different template layout for one controller, the default is default layout, now try to add a photo layout.

<?php
// src/Flower/Templates/sakura/photo.php
?>
<h1>Hello <?php echo $this->escape($name); ?></h1>
<img src="http://i.imgur.com/WVpwzJ9.jpg" alt="Sakura">

Then we render photo.php by $view->setLayout('photo').

// src/Flower/Controller/Sakura/GetController.php

// ...

protected function doExecute()
{
    $view = $this->getView();

    $view['name'] = 'Sakura';

    return $view->setLayout('photo')->render();
}

Use Edge Template Engine

Edge is Windwalker built-in template engine to support Windwalker build flexible layout. It is a clone of Laravel Blade engine now but add some new features.

We create a template named default.edge.php or default.blade.php.

{{-- src/Flower/Templates/sakura/default.edge.php --}}

@extends('_global.html')

@section('content')
<div class="container">
    <h1>Hello {{ $name }} in edge engine</h1>
</div>
@stop

Render this template in Controller

protected function doExecute()
{
    return $this->renderView('Sakura', 'default', 'edge', ['name' => 'Sakura']);
}

Will output

p-2016-07-08-002

Complete Ths Package

Our namespace start with Flower\, in Windwalker, we call this "Flower package", currently we haven't create package class, but controller and routing are works because Windwalker has a default simple routing help us mapping controller with URL, so /flower/sakura will auto direct to Flower\Controller\Sakura\GetController.

Simple routing is very slow so we can disable it in etc/config.yml

# etc/config.yml

routing:
    simple_route: false

After set simple_route to false, you will see your application return RouteNotFoundException (404) Unable to handle request for route "flower/sakura"

Now we must prepare a standard package environment so we can use more advanced functions in the future.

Add Package Class

Create a FlowerPackage first.

<?php
// Flower/FlowerPackage.php

namespace Flower;

use Windwalker\Core\Package\AbstractPackage;

class FlowerPackage extends AbstractPackage
{

}

Next, register it to etc/app/web.php, the flower key name is alias of your package, you can customize it if package name conflict.

// ...

    'packages' => [
        'flower' => \Flower\FlowerPackage::class
    ],

// ...

Register Routing

And then, add a new routing profile to etc/routing.yml.

# ...

flower:
    pattern: /flower
    package: flower

You can also do this by using $ php windwalker package install flower in CLI after package registered.

The last step, create package routing at src/Flower/routing.yml.

# src/Flower/routing.yml

sakura:
    pattern: /sakura
    controller: Sakura

OK, the Sakura page will return. To register a package and routing is a bit of bother, but it will be very flexible if we want to organize a lot of controllers and routes in the future, if we have a big system and many developers.

Model Repository

Windwalker provides a simple ModelRepository class to help you organize your data source.

Add SakuraModel class.

<?php
// src/Flower/Model/SakuraModel.php

namespace Flower\Model;

use Windwalker\Core\Model\ModelRepository;

class SakuraModel extends ModelRepository
{
    public function getContent()
    {
        return [
            ['title' => 'foo'],
            ['title' => 'bar'],
            ['title' => 'yoo'],
        ];
    }
}

Use this Model in controller.

// ...

/** @var SakuraModel $model */
$model   = $this->getModel();
$content = $model->getContent();

return $this->renderView('Sakura', 'default', 'edge', ['content' => $content]);

Modify the template to loop content variable.

@extends('_global.html')

@section('content')
<div class="container">
    <h1>Hello Sakura</h1>
    <ul>
        @foreach ($content as $item)
        <li>{{ $item['title'] }}</li>
        @endforeach
    </ul>
</div>
@stop

The result:

p-2016-07-08-003


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