Custom settings page

anromeda-settings-page.php

<?php if (!defined('FW')) die('Forbidden');

// file: {theme}/inc/includes/demo-settings-page.php // https://github.com/ThemeFuse/Theme-Includes

final class _Andromeda_Unyson_Settings_Page
{
    /**
     * @var FW_Form
     */
    private static $settings_form;

    public static function init()
    {
        self::$settings_form = new FW_Form('andromeda_settings', array(
            'render'   => array(__CLASS__, '_settings_form_render'),
            'validate' => array(__CLASS__, '_settings_form_validate'),
            'save'     => array(__CLASS__, '_settings_form_save'),
        ));

        add_action('admin_menu', array(__CLASS__, '_action_admin_menu'));
    }

    private static function get_options()
    {
        /**
         * Load options from
         * {theme}/framework-customizations/theme/options/settings.php
         */
        $options = fw()->theme->get_options('andromeda-settings');

        if (empty($options)) { // the file doesn't exist, use demo options
            $options = array(
                't1' => array(
                    'type' => 'tab',
                    'title' => __('Demo Tab #1', 'fw'),
                    'options' => array(
                        'b1' => array(
                            'type' => 'box',
                            'title' => __('Demo Box #1', 'fw'),
                            'options' => array(
                                'o1' => array(
                                    'type' => 'text',
                                    'label' => __('Demo Option #1', 'fw'),
                                    'value' => 'Default Value #1',
                                ),
                                'o2' => array(
                                    'type' => 'textarea',
                                    'label' => __('Demo Option #2', 'fw'),
                                    'value' => 'Default Value #2',
                                ),
                            ),
                        ),
                        'b2' => array(
                            'type' => 'box',
                            'title' => __('Demo Box #2', 'fw'),
                            'options' => array(
                                'o3' => array(
                                    'type' => 'checkbox',
                                    'label' => __('Demo Option #3', 'fw'),
                                ),
                                'o4' => array(
                                    'type' => 'text',
                                    'label' => __('Demo Option #4', 'fw'),
                                ),
                            ),
                        ),
                    ),
                ),
                't2' => array(
                    'type' => 'tab',
                    'title' => __('Demo Tab #1', 'fw'),
                    'options' => array(
                        'o5' => array(
                            'type' => 'checkbox',
                            'label' => __('Demo Option #5', 'fw'),
                        ),
                        'o6' => array(
                            'type' => 'text',
                            'label' => __('Demo Option #6', 'fw'),
                        ),
                    ),
                ),
            );
        }

        return $options;
    }

    private static function get_db_options()
    {
        return FW_WP_Option::get('andromeda_settings_options');
    }

    private static function set_db_options($value)
    {
        if (empty($value)) { // happens on settings reset
            delete_option('andromeda_settings_options');
        } else {
            FW_WP_Option::set(
                'andromeda_settings_options',
                null,
                $value
            );
        }
    }

    public static function _action_admin_menu()
    {
     
        add_menu_page(
            __( 'Andromeda Settings', 'fw' ),
            __( 'Andromeda Settings', 'fw' ),
            'manage_options',
            'andromeda-settings',
            array(__CLASS__, '_print_settings_page')
        );
    }

    public static function _print_settings_page()
    {
        echo '<div class="wrap">';

        echo '<h2>' . __('Andromeda Settings', 'fw') . '</h2><br/>';

        self::$settings_form->render();

        echo '</div>';
    }

    public static function _settings_form_render($data)
    {
        $options = self::get_options();

        if ($values = FW_Request::POST(FW_Option_Type::get_default_name_prefix())) {
            // This is form submit, extract correct values from $_POST values
            $values = fw_get_options_values_from_input($options, $values);
        } else {
            // This is GET request, extract previously saved correct values
            $values = self::get_db_options();
        }

        $data['attr']['class'] = 'andromeda-settings-form';

        $data['submit']['html'] =
            fw_html_tag('input', array(
                'type' => 'submit',
                'name' => 'andromeda_settings_save',
                'value' => __('Save', 'fw'),
                'class' => 'button-primary button-large',
            ))
            . '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;' .
            fw_html_tag('input', array(
                'type' => 'submit',
                'name' => 'andromeda_settings_reset',
                'value' => __('Reset', 'fw'),
                'class' => 'button-secondary button-large',
            ));

        echo fw()->backend->render_options($options, $values);

        return $data;
    }

    public static function _settings_form_validate($errors)
    {
        if (!current_user_can('manage_options')) {
            $errors['_no_permission'] = __('You have no permissions to change settings options', 'fw');;
        }

        return $errors;
    }

    public static function _settings_form_save($data)
    {
        if ( ! empty( $_POST['andromeda_settings_reset'] ) ) { // The "Reset" button was pressed
            self::set_db_options(null);

            FW_Flash_Messages::add(
                'andromeda_settings_form_reset',
                __('The options were successfully reset', 'fw'),
                'success'
            );
        } else {
            self::set_db_options(
                fw_get_options_values_from_input(self::get_options())
            );

            FW_Flash_Messages::add(
                'andromeda_settings_form_save',
                __('The options were successfully saved', 'fw'),
                'success'
            );
        }

        // redirect to the same page to prevent form re-submit on page refresh
        $data['redirect'] = fw_current_url();

        return $data;
    }
}
add_action('fw_init', array('_Andromeda_Unyson_Settings_Page', 'init'));