README

Brainlight is a lightweight templating system with minimal logic pattern.

This is a PHP implementation of the Brainlight paradigm.

• Requirements
• Installation
• Usage
• Additional logic
• Options
• License

Requirements

• PHP >= 8.1
• Composer

Installation

Require Brainlight Php package in your composer project using the following command:

composer require brainlight/brainlight-php

Usage

Create a new Brainlight Engine instance:

use Brainlight\BrainlightPhp\Engine;

$engine = new Engine([
    'cacheDir' => __DIR__ . '/cache',
    'templatesDir' => __DIR__,
]);

Then render any Brainlight template:

echo $engine->render('templateName', [
    'title' => 'Homepage',
]);

Make reference to the Brainlight documentation for templates syntax.

Additional logic

Brainlight PHP supports templates with additional logic by making use of the Brainlight\BrainlightPhp\Logic class and namespaces.

First consider adding a namespace root in your engine configuration:

use Brainlight\BrainlightPhp\Engine;

$engine = new Engine([
    'cacheDir' => __DIR__ . '/cache',
    'templatesDir' => __DIR__,
    'logicNamespace' => 'Logic',
]);

Then create a new logic class by extending Brainlight\BrainlightPhp\Logic:

namespace Logic;

use Brainlight\BrainlightPhp\Logic;

class Button extends Logic
{
    // ...
}

This way, while rendering {{ >+ button }} and {{ &+ button }} class Logic\Button will be loaded.

In addition, the template name inside these tags will be converted to a namespace. So buttons.button-delete will become Buttons\ButtonDelete.

A Logic class must implement the getVariables() method:

namespace Logic;

use Brainlight\BrainlightPhp\Logic;

class Button extends Logic
{
    protected function getVariables(array $parameters): array
    {
        return $parameters;
    }
}

The purpose of this function is to modify the arguments passed to the template. Such arguments are collected inside the parameters associative array.

It is possible to set mandatory arguments using the mandatory array property and mandatory slots using the mandatorySlots array property:

namespace Logic\Inclusions;

use Brainlight\BrainlightPhp\Logic;

class Page extends Logic
{
    protected array $mandatory = [
        'title',
    ];

    protected array $mandatorySlots = [
        'content',
    ];

    // ...
}

It is also possible to change the default template associated with a logic class by setting its template property:

namespace Logic;

use Brainlight\BrainlightPhp\Logic;

class Button extends Logic
{
    public ?string $template = 'buttons.custom-template';

    // ...
}

To render a template with additional logic directly from a PHP script, use the third parameter of the render() function:

$engine->render('button', [], true);

Options

The Engine constructor supports the following options:

cacheDir

Type: string

Absolute path where cached templates will be stored.

This field is mandatory.

templatesDir

Type: mixed

Absolute path to the directory containing templates. It also accepts an array of paths.

If false is provided, the render() method will accept a fully qualified filename instead of a template name.

Example:

use Brainlight\BrainlightPhp\Engine;

$engine = new Engine([
    'cacheDir' => __DIR__ . '/cache',
    'templatesDir' => false,
]);

echo $engine->render(__DIR__ . '/templateName.brain');

Default value: false

partialsDir

Type: mixed

Absolute path to the directory containing partial templates for inclusions and extensions. It also accepts an array of paths.

If false is provided, the template engine will consider the template name of inclusion tags as a fully qualified filename instead of a template name.

If null is provided, partial templates will be resolved according to the same rule set with 'templatesDir'.

Default value: null

logicNamespace

Type: string|bool

Namespace root used to resolve additional logic classes.

Default value: false

extension

Type: string

The Brainlight template file extension.

Default value: 'brain'

Escaping options

The following options (with default value) are applied to any escape operation performed with the PHP function htmlspecialchars:

[
    'escapeFlags' => ENT_QUOTES,
    'escapeEncoding' => 'UTF-8',
    'escapeDoubleEncode' => true,
]

License

Brainlight PHP is open-sourced software licensed under the MIT license