[WordPress] WordPress Widgets: Refactoring, Part 3

00-abstract-subscriber.php

<?php

/*
 * This file is part of the WordPress Widget Boilerplate
 *
 * (c) Tom McFarlin <tom@tommcfarlin.com>
 *
 * This source file is subject to the GPL license that is bundled
 * with this source code in the file LICENSE.
 */

namespace WordPressWidgetBoilerplate\Subscriber;

/**
 * An abstract implementation of a subscriber that requires a hook and the ability to
 * start the class.
 */
abstract class AbstractSubscriber
{
    /**
     * @var string a reference to the hook to which the subscriber should be registered
     */
    protected $hook;

    /**
     * @param string $hook the hook to which the subscriber is registered
     */
    public function __construct(string $hook)
    {
        $this->hook = $hook;
    }

    /**
     * @return string the hook to which the subscriber is registered
     */
    public function getHook(): string
    {
        return $this->hook;
    }

    /**
     * Implements the domain logic for the concrete class implementating this subcriber.
     */
    abstract public function load();
}

02-admin-script-subscriber.php

<?php

/*
 * This file is part of the WordPress Widget Boilerplate
 *
 * (c) Tom McFarlin <tom@tommcfarlin.com>
 *
 * This source file is subject to the GPL license that is bundled
 * with this source code in the file LICENSE.
 */

namespace WordPressWidgetBoilerplate\Subscriber;

/**
 * The subscriber responsible for loading the JavaScript on the Widget's adminsitration page.
 */
class AdminScriptAssetSubscriber extends AbstractSubscriber
{
    /**
     * {@inheritdoc}
     */
    public function __construct(string $hook)
    {
        parent::__construct($hook);
    }

    /**
     * Adds the administrative JavaScript to the widget administration page.
     */
    public function load()
    {
        if ('widgets' !== get_current_screen()->id) {
            return;
        }

        wp_enqueue_script(
            'wordpress-widget-boilerplate',
            plugin_dir_url(\dirname(__DIR__)).'assets/js/admin.js'
        );
    }
}

03-admin-style-subscriber.php

<?php

/*
 * This file is part of the WordPress Widget Boilerplate
 *
 * (c) Tom McFarlin <tom@tommcfarlin.com?
 *
 * This source file is subject to the GPL license that is bundled
 * with this source code in the file LICENSE.
 */

namespace WordPressWidgetBoilerplate\Subscriber;

/**
 * The subscriber responsible for loading the stylesheet on the Widget administration page.
 */
class AdminStyleAssetSubscriber extends AbstractSubscriber
{
    /**
     * {@inheritdoc}
     */
    public function __construct(string $hook)
    {
        parent::__construct($hook);
    }

    /**
     * Adds the administrative stylesheet to the widget administration page.
     */
    public function load()
    {
        if ('widgets' !== get_current_screen()->id) {
            return;
        }

        wp_enqueue_style(
            'wordpress-widget-boilerplate',
            plugin_dir_url(\dirname(__DIR__)).'assets/css/admin.css'
        );
    }
}

04-public-script-subscriber.php

<?php

/*
 * This file is part of the WordPress Widget Boilerplate
 *
 * (c) Tom McFarlin <tom@tommcfarlin.com>
 *
 * This source file is subject to the GPL license that is bundled
 * with this source code in the file LICENSE.
 */

namespace WordPressWidgetBoilerplate\Subscriber;

/**
 * The subscriber responsible for loading the JavaScript on the blog.
 */
class PublicScriptAssetSubscriber extends AbstractSubscriber
{
    /**
     * {@inheritdoc}
     */
    public function __construct(string $hook)
    {
        parent::__construct($hook);
    }

    /**
     * Adds the JavaScript to the public-facing side of the site.
     */
    public function load()
    {
        if (is_admin()) {
            return;
        }

        wp_enqueue_script(
            'wordpress-widget-boilerplate',
            plugin_dir_url(\dirname(__DIR__)).'assets/js/widget.js'
        );
    }
}

05-public-style-subscriber.php

<?php

/*
 * This file is part of the WordPress Widget Boilerplate
 *
 * (c) Tom McFarlin <tom@tommcfarlin.com>
 *
 * This source file is subject to the GPL license that is bundled
 * with this source code in the file LICENSE.
 */

namespace WordPressWidgetBoilerplate\Subscriber;

/**
 * The subscriber responsible for loading the stylesheet on the blog.
 */
class PublicStyleAssetSubscriber extends AbstractSubscriber
{
    /**
     * {@inheritdoc}
     */
    public function __construct(string $hook)
    {
        parent::__construct($hook);
    }

    /**
     * Adds the stylesheet to the public-facing side of the site.
     */
    public function load()
    {
        if (is_admin()) {
            return;
        }

        wp_enqueue_style(
            'wordpress-widget-boilerplate',
            plugin_dir_url(\dirname(__DIR__)).'assets/css/widget.css'
        );
    }
}