8fold Partials for CommonMark

This library is an extension for the CommonMark parser from the PHP League, adding the ability to insert renderable partials.

In other words, and with loads of humility, and we could be wrong, Markdown can feel more like a template engine.

Installation

composer require 8fold/commonmark-partials

Usage

⚠️ Warning: Users of this library are responsible for sanitizing content.

Create your partial class:

<?php

namespace My\Namespace;

use Eightfold\CommonMarkPartials\PartialInterface;

class MyPartial implements PartialInterface
{
  public function __invoke(
    PartialInput $input, 
    array $extras = []
  ): string {
    return 'Will be processed like any other Markdown input.'
  }
}

Write your Markdown with your partial:

# CommonMark Partials

{!! my_partial !!}

Instantiate CommonMark:

use Eightfold\CommonMarkPartials\PartialsExtension;

use My\Namespace\MyPartial;

$environment = new Environment([
  'partials' => [
    'partials' => [
      'my_partial' => MyPartial::class
    ]
  ]
]);

$environment->addExtension(new CommonMarkCoreExtension())
  ->addExtension(new PartialsExtension());

$converter = new MarkdownConverter($environment);

Render the Markdown:

$html = $converter->convertToHtml($markdown)->getContents();

Print the results:

print $html;

The result should be:

<h1>CommonMark Partials</h1>
<p>Will be processed like any other Markdown input.</p>

If you want to have your partial return HTML, you will need to update the CommonMark configuration to allow HTML:

$environment = new Environment([
  'allow_html' => 'allow',
  'partials' => [
    'partials' => [
      'my_partial' => MyPartial::class
    ]
  ]
]);

Details

We wanted to allow content creators to use Markdown to create the bulk of their content; through server-side rendering. Sometimes, we wanted (or needed) a way to inject HTML based on logic code and data.

We made it possible on one or two sites, which worked well. Now we've made it possible to use our Markdown library of choice (CommonMark).

Other

{links or descriptions or license, versioning, and governance}