Installation

Open a command console, enter your project directory and execute the following command to download the latest stable version of this library:

$ php composer.phar require rollerworks/app-sectioning

This command requires you to have Composer installed globally, as explained in the installation chapter of the Composer documentation.

You are now ready to use the SectioningFactory for registering your application sections.

Registering Sections

Note: The SectioningFactory needs to register the app-sections parameters before any Extension can use them. Because of this, the SectioningFactory is placed directly within the Kernel before any extensions are initialized.

The AppSectioning configurator helps with separating your Symfony application into multiple sections (eg. frontend and backend). Each with there own configurable URI pattern.

The examples in this document expect you can update the Applications's Kernel by either keeping everything in a single application or using a custom Symfony Flex recipe that overwrites the default Kernel class.

// src/Kernel.php

use Rollerworks\Component\AppSectioning\SectioningFactory;
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;
use Symfony\Component\Routing\RouteCollectionBuilder;

class Kernel extends BaseKernel
{
    use MicroKernelTrait;

    // ...

    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader): void
    {
        $sections = $container->getParameter('app_sections');
        (new SectioningFactory($container, 'app.section'))
            // You can use choose to container parameters or load them from the Enviroment (requires manual cache:clear)
            // Only sections defined in $requiredSections are registered.
            ->set('frontend', $sections['frontend'])
            ->set('backend', $sections['backend'])
            
            // ->set('backend', $_ENV['APP_BACKEND_URL'] ?? '/admin') # Note: Requires a manual cache:clear
            ->register();
            
        // ...
    }
}

That's it! You can now configure the sections with a custom host and prefix using the following configuration:

parameters:
    app_sections:
        frontend: 'example.com/'
        backend: 'https://example.com/admin'

Or loading them from a .env file:

# NOTE. Changing this value requires a manual cache:clear
APP_FRONTEND_URL="example.com/"
APP_BACKEND_URL="https://example.com/admin"

Caution: A prefix must always begin with a / otherwise admin/ is seen as host admin and prefix /.

Dynamic host requirements

The host allows the usage of variables with accepted values separated by |; Eg. com|net. As you would in the Routing system (except that regexp is not supported).

An variable is defined as {variable-name;default-value;accepted-values}

parameters:
    app_sections:
        frontend: 'example.{tld;com;com|net}/'
        backend: 'example.{tld;nl;nl|de}/'

Or loading them from a .env file:

# NOTE. Changing this value requires a manual cache:clear
APP_FRONTEND_URL="example.{tld;com;com|net}/"
APP_BACKEND_URL="example.{tld;nl;nl|de}/"

Container parameters

The SectioningFactory registers a number of service-container parameters for usage in your service definitions, [security config] and routing schema.

Parameters are registered as follow:

'app.section.frontend.is_secure'    : false
'app.section.channel'               : null
'app.section.frontend.host'         : 'example.com'
'app.section.frontend.domain'       : 'example.com'
'app.section.frontend.host_pattern' : '^example\.com$'
'app.section.frontend.prefix'       : '/'
'app.section.frontend.path'         : '^/(?!(backend|api)/)'

Note:

The host_pattern and path are regular expressions, host_pattern matches completely but path will only matches the beginning of a uri.
The host may contain variables such as example.{tld} use domain which only contains a value if the host doesn not contain any variables.
The channel is only set to 'https' when is_secure is true. This prevents forcing an HTTP channel when HTTPS is used.

The app.section.frontend.request_matcher service provides a RequestMatcher for a firewall and other services.

All parameters follow the same {service-prefix}.{section-name} pattern.

The Service-prefix is configured as the second parameter of the SectioningFactory used when registering (app.section in the example above).

And {section-name} as the name of the section (like 'frontend').

Limitations

The main purpose of this library is separating the application's UI into multiple sections, using the host and prefix; The schema is used to configure is_secure.

The prefix does not allow the usage of variables (you can still use variables in routes themselves);
The host variables requirements do not allow regexp;
The host accepts an IP address but does not allow variables then.

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