ogre-obfuscation/inc/settings.php

<?php
/**
 * @package ogre-obfuscation
 * @author cleverogre
 * @version 0.2.0
 * @since 0.1.0
 */

namespace Ogre\Obfuscation;

use Ogre\Singleton;

defined('ABSPATH') || exit;

final class Settings {
    use Singleton;

    private $defaults; // Value set in get function

    // Admin Settings
    public $email_enabled;

    protected function __construct() {
        // Use getter/setter if not set
        foreach ($this as $key => $value) {
            unset($this->$key);
        }
    }

    public function __set($key, $value) {
        if (property_exists($this, $key)) {
            switch ($key) {
                /* // Read-only properties
                case 'readonly':
                    break;
                */

                default:
                    $options = get_option('obfuscation_options');
                    $options['obfuscation_settings_' . $key] = $value;
                    update_option('obfuscation_options', $options);
                    break;
            }
        }
        return $this;
    }

    public function __get($key) {
        if (property_exists($this, $key)) {
            switch ($key) {
                // Constant properties
                case 'defaults':
                    return array(
                        'email_enabled' => '1',
                    );
                    break;

                default:
                    $options = get_option('obfuscation_options');

                    if (isset($options['obfuscation_settings_' . $key]) && !empty($options['obfuscation_settings_' . $key])) {
                        return $options['obfuscation_settings_' . $key];
                    } else if (isset($this->defaults[$key])) {
                        return $this->defaults[$key];
                    } else {
                        return false;
                    }

                    break;
            }
        }
        return null;
    }
}

final class SettingsPage {
    use Singleton;

    protected function __construct() {
        add_action('admin_init', array($this, 'init'));
        add_action('admin_menu', array($this, 'menu'));
    }

    public function menu() {
        if (!current_user_can('manage_options')) return;

        $page = add_options_page(__('Ogre Obfuscation Settings', 'obfuscation'), __('Ogre Obfuscation', 'obfuscation'), 'manage_options', 'obfuscation_settings', array($this, 'page'));
        add_action('load-' . $page, array($this, 'load'));
    }

    public function load() {
        if (!current_user_can('manage_options')) return;

        add_action('admin_enqueue_scripts', array($this, 'admin_enqueue_scripts'));
    }

    public function admin_enqueue_scripts() {
        //wp_enqueue_script('obfuscation-admin', Settings::instance()->dir . 'assets/js/obfuscation.admin.js', array('jquery'), Settings::instance()->version, true);
    }

    public function init() {
        register_setting('obfuscation', 'obfuscation_options'); //, array($this, 'validate_options'));

        // Message Settings

        add_settings_section('obfuscation_section_obfuscation', __('Obfuscation', 'obfuscation'), array($this, 'section'), 'obfuscation');

        add_settings_field('obfuscation_email_enabled', __('Email Obfuscation Enabled', 'obfuscation'), array($this, 'field_checkbox'), 'obfuscation', 'obfuscation_section_obfuscation', array(
            'id' => 'obfuscation_settings_email_enabled',
            'default' => Settings::instance()->defaults['email_enabled'],
        ));
    }

    public function page() {
        if (!current_user_can('manage_options')) return;

        // Check if the user has submitted the settings
        if (isset($_GET['settings-updated'])) {
            // Show update message
            //add_settings_error('obfuscation_messages', 'obfuscation_message', __('Settings Saved', 'obfuscation'), 'updated');
        }

        // Show error/update messages
        settings_errors('obfuscation_messages');
?>
<div class="wrap">
    <h1><?php echo esc_html(get_admin_page_title()); ?></h1>
    <form action="options.php" method="post"><?php
        settings_fields('obfuscation');
        do_settings_sections('obfuscation');
        submit_button(__('Save Settings', 'obfuscation'));
    ?></form>
</div>
<?php
    }

    // Sections

    public function section($args) {
        // <p>Description</p>
    }

    // Fields

    public function field_text($args) {
        $value = '';
        $options = get_option('obfuscation_options');
        if (isset($args['default'])) $value = $args['default'];
        if (isset($args['id']) && !empty($args['id']) && isset($options[$args['id']]) && !empty($options[$args['id']])) $value = $options[$args['id']];

        $type = 'text';
        if (isset($args['type']) && !empty($args['type'])) {
            $type = $args['type'];
        }

        echo '<input class="regular-text" type="' . $type . '" value="' . esc_attr($value) . '"';

        if (isset($args['id']) && !empty($args['id'])) {
            echo ' id="' . esc_attr($args['id']) . '"';
            echo ' name="obfuscation_options[' . esc_attr($args['id']) . ']"';
        }
        if (isset($args['placeholder']) && !empty($args['placeholder'])) {
            echo ' placeholder="' . esc_attr($args['placeholder']) . '"';
        }

        echo ' />';

        if (isset($args['description']) && !empty($args['description'])) {
            echo '<p class="description">';
            _e($args['description'], 'obfuscation');
            echo '</p>';
        }
    }

    public function field_checkbox($args) {
        $value = false;
        $options = get_option('obfuscation_options');
        if (isset($args['default'])) $value = $args['default'];
        if (isset($args['id']) && !empty($args['id']) && isset($options[$args['id']]) && !empty($options[$args['id']])) $value = $options[$args['id']];

        echo '<input type="checkbox" value="1" type="checkbox" ' . checked($value, 1, false);

        if (isset($args['id']) && !empty($args['id'])) {
            echo ' id="' . esc_attr($args['id']) . '"';
            echo ' name="obfuscation_options[' . esc_attr($args['id']) . ']"';
        }
        echo ' />';

        if (isset($args['description']) && !empty($args['description'])) {
            echo '<p class="description">';
            esc_html_e($args['description'], 'obfuscation');
            echo '</p>';
        }
    }

    public function validate_options($fields) {
        $valid_fields = array();

        foreach ($fields as $id => $field) {
            if (!isset($input[$id])) continue;
        }

        return apply_filters('validate_options', $valid_fields, $fields);
    }

}

SettingsPage::instance();