WP-WHMCS-Pricing/whmcs-pricing-plugin/includes/admin-settings.php

<?php
/**
 * Admin Settings
 *
 * Handles plugin settings page in WordPress admin
 */

// Exit if accessed directly
if (!defined('ABSPATH')) {
    exit;
}

class WHMCS_Pricing_Admin {

    /**
     * Single instance
     */
    private static $instance = null;

    /**
     * Get instance
     */
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Constructor
     */
    private function __construct() {
        add_action('admin_menu', array($this, 'add_admin_menu'));
        add_action('admin_init', array($this, 'register_settings'));
        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_styles'));
        add_action('admin_post_whmcs_clear_cache', array($this, 'handle_clear_cache'));
    }

    /**
     * Add admin menu
     */
    public function add_admin_menu() {
        add_options_page(
            __('WHMCS Pricing Settings', 'whmcs-pricing'),
            __('WHMCS Pricing', 'whmcs-pricing'),
            'manage_options',
            'whmcs-pricing',
            array($this, 'render_settings_page')
        );
    }

    /**
     * Register settings
     */
    public function register_settings() {
        register_setting(
            'whmcs_pricing_settings',
            'whmcs_pricing_settings',
            array($this, 'sanitize_settings')
        );

        // API Settings Section
        add_settings_section(
            'whmcs_pricing_api_section',
            __('WHMCS API Configuration', 'whmcs-pricing'),
            array($this, 'render_api_section'),
            'whmcs-pricing'
        );

        add_settings_field(
            'api_url',
            __('WHMCS URL', 'whmcs-pricing'),
            array($this, 'render_text_field'),
            'whmcs-pricing',
            'whmcs_pricing_api_section',
            array(
                'name' => 'api_url',
                'placeholder' => 'https://your-whmcs-domain.com',
                'description' => __('Your WHMCS installation URL (without /includes/api.php)', 'whmcs-pricing')
            )
        );

        add_settings_field(
            'api_identifier',
            __('API Identifier', 'whmcs-pricing'),
            array($this, 'render_text_field'),
            'whmcs-pricing',
            'whmcs_pricing_api_section',
            array(
                'name' => 'api_identifier',
                'description' => __('Your WHMCS API identifier', 'whmcs-pricing')
            )
        );

        add_settings_field(
            'api_secret',
            __('API Secret', 'whmcs-pricing'),
            array($this, 'render_password_field'),
            'whmcs-pricing',
            'whmcs_pricing_api_section',
            array(
                'name' => 'api_secret',
                'description' => __('Your WHMCS API secret', 'whmcs-pricing')
            )
        );

        // Display Settings Section
        add_settings_section(
            'whmcs_pricing_display_section',
            __('Display Settings', 'whmcs-pricing'),
            array($this, 'render_display_section'),
            'whmcs-pricing'
        );

        add_settings_field(
            'default_currency',
            __('Default Currency', 'whmcs-pricing'),
            array($this, 'render_currency_field'),
            'whmcs-pricing',
            'whmcs_pricing_display_section',
            array(
                'name' => 'default_currency',
                'description' => __('Default currency for pricing display', 'whmcs-pricing')
            )
        );

        add_settings_field(
            'show_decimals',
            __('Show Decimals', 'whmcs-pricing'),
            array($this, 'render_checkbox_field'),
            'whmcs-pricing',
            'whmcs_pricing_display_section',
            array(
                'name' => 'show_decimals',
                'label' => __('Display prices with decimal places (e.g., €67.00 instead of €67)', 'whmcs-pricing')
            )
        );

        // Performance Settings Section
        add_settings_section(
            'whmcs_pricing_performance_section',
            __('Performance Settings', 'whmcs-pricing'),
            array($this, 'render_performance_section'),
            'whmcs-pricing'
        );

        add_settings_field(
            'cache_duration',
            __('Cache Duration', 'whmcs-pricing'),
            array($this, 'render_number_field'),
            'whmcs-pricing',
            'whmcs_pricing_performance_section',
            array(
                'name' => 'cache_duration',
                'min' => 300,
                'max' => 86400,
                'step' => 300,
                'description' => __('How long to cache API responses (in seconds). Default: 3600 (1 hour)', 'whmcs-pricing')
            )
        );

        // Advanced Settings Section
        add_settings_section(
            'whmcs_pricing_advanced_section',
            __('Advanced Settings', 'whmcs-pricing'),
            array($this, 'render_advanced_section'),
            'whmcs-pricing'
        );

        add_settings_field(
            'debug_mode',
            __('Debug Mode', 'whmcs-pricing'),
            array($this, 'render_checkbox_field'),
            'whmcs-pricing',
            'whmcs_pricing_advanced_section',
            array(
                'name' => 'debug_mode',
                'label' => __('Enable debug logging and disable cache', 'whmcs-pricing')
            )
        );
    }

    /**
     * Render settings page
     */
    public function render_settings_page() {
        if (!current_user_can('manage_options')) {
            return;
        }

        // Show success message
        if (isset($_GET['settings-updated'])) {
            add_settings_error(
                'whmcs_pricing_messages',
                'whmcs_pricing_message',
                __('Settings saved successfully.', 'whmcs-pricing'),
                'updated'
            );
        }

        if (isset($_GET['cache-cleared'])) {
            add_settings_error(
                'whmcs_pricing_messages',
                'whmcs_pricing_message',
                __('Cache cleared successfully.', 'whmcs-pricing'),
                'updated'
            );
        }

        settings_errors('whmcs_pricing_messages');
        ?>
        <div class="wrap whmcs-pricing-admin">
            <h1><?php echo esc_html(get_admin_page_title()); ?></h1>

            <div class="whmcs-pricing-container">
                <div class="whmcs-pricing-main">
                    <form action="options.php" method="post">
                        <?php
                        settings_fields('whmcs_pricing_settings');
                        do_settings_sections('whmcs-pricing');
                        submit_button(__('Save Settings', 'whmcs-pricing'));
                        ?>
                    </form>

                    <form method="post" action="<?php echo esc_url(admin_url('admin-post.php')); ?>">
                        <?php wp_nonce_field('whmcs_clear_cache', 'whmcs_cache_nonce'); ?>
                        <input type="hidden" name="action" value="whmcs_clear_cache">
                        <?php submit_button(__('Clear All Cache', 'whmcs-pricing'), 'secondary', 'clear_cache', false); ?>
                    </form>
                </div>

                <div class="whmcs-pricing-sidebar">
                    <div class="whmcs-pricing-box">
                        <h3 class="whmcs-toggle" style="cursor: pointer;">
                            <?php _e('Shortcode Usage', 'whmcs-pricing'); ?> <span style="float: right;">▲</span>
                        </h3>
                        <p class="whmcs-preview" style="margin: 10px 0; color: #666; font-size: 13px; display: none;">
                            <?php _e('Expand to view shortcode examples and parameters...', 'whmcs-pricing'); ?>
                        </p>
                        <div class="whmcs-toggle-content">
                            <p><?php _e('Use these shortcodes in your posts, pages, or Elementor:', 'whmcs-pricing'); ?></p>

                            <h4><?php _e('Basic Usage:', 'whmcs-pricing'); ?></h4>
                            <code>[whmcs_price product_id="123"]</code>

                            <h4><?php _e('With Billing Cycle:', 'whmcs-pricing'); ?></h4>
                            <code>[whmcs_price product_id="123" billing_cycle="monthly"]</code>

                            <h4><?php _e('With Currency:', 'whmcs-pricing'); ?></h4>
                            <code>[whmcs_price product_id="123" currency="EUR"]</code>

                            <h4><?php _e('Without Decimals:', 'whmcs-pricing'); ?></h4>
                            <code>[whmcs_price product_id="123" format="no_decimals"]</code>

                            <h4><?php _e('With Language:', 'whmcs-pricing'); ?></h4>
                            <code>[whmcs_price product_id="123" lang="dutch"]</code>

                            <h4><?php _e('Available Billing Cycles:', 'whmcs-pricing'); ?></h4>
                            <ul>
                                <li>monthly</li>
                                <li>quarterly</li>
                                <li>semiannually</li>
                                <li>annually</li>
                                <li>biennially</li>
                                <li>triennially</li>
                            </ul>
                        </div>
                    </div>

                    <div class="whmcs-pricing-box">
                        <h3 class="whmcs-toggle" style="cursor: pointer;">
                            <?php _e('CSS Styling Guide', 'whmcs-pricing'); ?> <span style="float: right;">▼</span>
                        </h3>
                        <p class="whmcs-preview" style="margin: 10px 0; color: #666; font-size: 13px;">
                            <?php _e('Expand to view CSS examples and styling options...', 'whmcs-pricing'); ?>
                        </p>
                        <div class="whmcs-toggle-content" style="display: none;">
                            <p><?php _e('Add custom CSS to style your prices. Go to Appearance > Customize > Additional CSS:', 'whmcs-pricing'); ?></p>

                            <h4><?php _e('HTML Structure:', 'whmcs-pricing'); ?></h4>
                            <code style="white-space: pre-wrap;">&lt;span class="whmcs-price"&gt;
  &lt;span class="currency-symbol"&gt;€&lt;/span&gt;
  &lt;span class="price-amount"&gt;67.00&lt;/span&gt;
  &lt;span class="billing-cycle"&gt;per month&lt;/span&gt;
&lt;/span&gt;</code>

                            <h4><?php _e('Example CSS:', 'whmcs-pricing'); ?></h4>
                            <code style="white-space: pre-wrap;">.whmcs-price {
  font-size: 24px;
  font-weight: bold;
  color: #2271b1;
}

.whmcs-price .price-amount {
  font-size: 32px;
}

.whmcs-price .billing-cycle {
  font-size: 14px;
  color: #666;
}</code>

                            <h4><?php _e('Using Custom Class:', 'whmcs-pricing'); ?></h4>
                            <code>[whmcs_price product_id="123" class="featured"]</code>
                            <p style="margin-top: 8px; font-size: 13px;"><?php _e('Then style with: .whmcs-price.featured { }', 'whmcs-pricing'); ?></p>
                        </div>
                    </div>

                    <div class="whmcs-pricing-box">
                        <h3><?php _e('Plugin Information', 'whmcs-pricing'); ?></h3>
                        <p><strong><?php _e('Version:', 'whmcs-pricing'); ?></strong> <?php echo WHMCS_PRICING_VERSION; ?></p>
                        <p><strong><?php _e('Author:', 'whmcs-pricing'); ?></strong> <a href="https://arkhost.com" target="_blank" rel="noopener noreferrer">ArkHost</a></p>
                        <p><strong><?php _e('Sponsored by:', 'whmcs-pricing'); ?></strong> <a href="https://duplika.com" target="_blank" rel="noopener noreferrer">Duplika</a></p>
                    </div>
                </div>
            </div>
        </div>

        <script>
        jQuery(document).ready(function($) {
            $('.whmcs-toggle').on('click', function() {
                var clickedBox = $(this).parent();
                var clickedPreview = clickedBox.find('.whmcs-preview');
                var clickedContent = clickedBox.find('.whmcs-toggle-content');
                var clickedArrow = $(this).find('span');

                // Close all other boxes first
                $('.whmcs-pricing-box').not(clickedBox).each(function() {
                    var otherPreview = $(this).find('.whmcs-preview');
                    var otherContent = $(this).find('.whmcs-toggle-content');
                    var otherArrow = $(this).find('.whmcs-toggle span');

                    if (otherContent.is(':visible')) {
                        otherPreview.slideDown(200);
                        otherContent.slideUp(200);
                        otherArrow.html('▼');
                    }
                });

                // Toggle clicked box
                clickedPreview.slideToggle(200);
                clickedContent.slideToggle(200);

                if (clickedContent.is(':visible')) {
                    clickedArrow.html('▲');
                } else {
                    clickedArrow.html('▼');
                }
            });
        });
        </script>
        <?php
    }

    /**
     * Section callbacks
     */
    public function render_api_section() {
        echo '<p>' . esc_html__('Configure your WHMCS API credentials. You can generate API credentials in WHMCS Admin > System Settings > API Credentials.', 'whmcs-pricing') . '</p>';
    }

    public function render_display_section() {
        echo '<p>' . esc_html__('Configure how prices are displayed on your website.', 'whmcs-pricing') . '</p>';
    }

    public function render_performance_section() {
        echo '<p>' . esc_html__('Optimize plugin performance with caching.', 'whmcs-pricing') . '</p>';
    }

    public function render_advanced_section() {
        echo '<p>' . esc_html__('Advanced options for troubleshooting and development.', 'whmcs-pricing') . '</p>';
    }

    /**
     * Field rendering methods
     */
    public function render_text_field($args) {
        $settings = get_option('whmcs_pricing_settings', array());
        $value = isset($settings[$args['name']]) ? $settings[$args['name']] : '';
        $placeholder = isset($args['placeholder']) ? $args['placeholder'] : '';
        ?>
        <input type="text"
               name="whmcs_pricing_settings[<?php echo esc_attr($args['name']); ?>]"
               value="<?php echo esc_attr($value); ?>"
               placeholder="<?php echo esc_attr($placeholder); ?>"
               class="regular-text">
        <?php if (isset($args['description'])): ?>
            <p class="description"><?php echo esc_html($args['description']); ?></p>
        <?php endif; ?>
        <?php
    }

    public function render_password_field($args) {
        $settings = get_option('whmcs_pricing_settings', array());
        $value = isset($settings[$args['name']]) ? $settings[$args['name']] : '';
        ?>
        <input type="password"
               name="whmcs_pricing_settings[<?php echo esc_attr($args['name']); ?>]"
               value="<?php echo esc_attr($value); ?>"
               class="regular-text">
        <?php if (isset($args['description'])): ?>
            <p class="description"><?php echo esc_html($args['description']); ?></p>
        <?php endif; ?>
        <?php
    }

    public function render_number_field($args) {
        $settings = get_option('whmcs_pricing_settings', array());
        $value = isset($settings[$args['name']]) ? $settings[$args['name']] : '';
        $min = isset($args['min']) ? $args['min'] : 0;
        $max = isset($args['max']) ? $args['max'] : 100000;
        $step = isset($args['step']) ? $args['step'] : 1;
        ?>
        <input type="number"
               name="whmcs_pricing_settings[<?php echo esc_attr($args['name']); ?>]"
               value="<?php echo esc_attr($value); ?>"
               min="<?php echo esc_attr($min); ?>"
               max="<?php echo esc_attr($max); ?>"
               step="<?php echo esc_attr($step); ?>"
               class="regular-text">
        <?php if (isset($args['description'])): ?>
            <p class="description"><?php echo esc_html($args['description']); ?></p>
        <?php endif; ?>
        <?php
    }

    public function render_checkbox_field($args) {
        $settings = get_option('whmcs_pricing_settings', array());
        $checked = isset($settings[$args['name']]) && $settings[$args['name']] ? 'checked' : '';
        ?>
        <label>
            <input type="checkbox"
                   name="whmcs_pricing_settings[<?php echo esc_attr($args['name']); ?>]"
                   value="1"
                   <?php echo $checked; ?>>
            <?php echo esc_html($args['label']); ?>
        </label>
        <?php
    }

    public function render_currency_field($args) {
        $settings = get_option('whmcs_pricing_settings', array());
        $value = isset($settings[$args['name']]) ? $settings[$args['name']] : 'USD';

        $currencies = array(
            'USD' => 'USD - US Dollar ($)',
            'EUR' => 'EUR - Euro (€)',
            'GBP' => 'GBP - British Pound (£)',
            'AUD' => 'AUD - Australian Dollar (A$)',
            'CAD' => 'CAD - Canadian Dollar (C$)',
            'JPY' => 'JPY - Japanese Yen (¥)',
            'CNY' => 'CNY - Chinese Yuan (¥)',
            'INR' => 'INR - Indian Rupee (₹)',
            'BRL' => 'BRL - Brazilian Real (R$)',
            'RUB' => 'RUB - Russian Ruble (₽)',
            'CHF' => 'CHF - Swiss Franc (Fr)',
            'SEK' => 'SEK - Swedish Krona (kr)',
            'NOK' => 'NOK - Norwegian Krone (kr)',
            'DKK' => 'DKK - Danish Krone (kr)',
            'PLN' => 'PLN - Polish Zloty (zł)',
            'THB' => 'THB - Thai Baht (฿)',
            'MYR' => 'MYR - Malaysian Ringgit (RM)',
            'SGD' => 'SGD - Singapore Dollar (S$)',
            'NZD' => 'NZD - New Zealand Dollar (NZ$)',
            'MXN' => 'MXN - Mexican Peso (Mex$)',
            'ZAR' => 'ZAR - South African Rand (R)'
        );
        ?>
        <select name="whmcs_pricing_settings[<?php echo esc_attr($args['name']); ?>]" class="regular-text">
            <?php foreach ($currencies as $code => $label): ?>
                <option value="<?php echo esc_attr($code); ?>" <?php selected($value, $code); ?>>
                    <?php echo esc_html($label); ?>
                </option>
            <?php endforeach; ?>
        </select>
        <?php if (isset($args['description'])): ?>
            <p class="description"><?php echo esc_html($args['description']); ?></p>
        <?php endif; ?>
        <?php
    }

    /**
     * Sanitize settings
     */
    public function sanitize_settings($input) {
        $sanitized = array();

        // Sanitize URL
        if (isset($input['api_url'])) {
            $sanitized['api_url'] = esc_url_raw($input['api_url']);
        }

        // Sanitize text fields
        $text_fields = array('api_identifier', 'api_secret', 'default_currency');
        foreach ($text_fields as $field) {
            if (isset($input[$field])) {
                $sanitized[$field] = sanitize_text_field($input[$field]);
            }
        }

        // Sanitize number
        if (isset($input['cache_duration'])) {
            $sanitized['cache_duration'] = absint($input['cache_duration']);
        }

        // Sanitize checkboxes
        $sanitized['show_decimals'] = isset($input['show_decimals']) ? true : false;
        $sanitized['debug_mode'] = isset($input['debug_mode']) ? true : false;

        return $sanitized;
    }

    /**
     * Handle clear cache action
     */
    public function handle_clear_cache() {
        if (!current_user_can('manage_options')) {
            wp_die(__('Unauthorized', 'whmcs-pricing'));
        }

        check_admin_referer('whmcs_clear_cache', 'whmcs_cache_nonce');

        WHMCS_Pricing_API::clear_all_cache();

        wp_redirect(add_query_arg(
            array(
                'page' => 'whmcs-pricing',
                'cache-cleared' => 'true'
            ),
            admin_url('options-general.php')
        ));
        exit;
    }

    /**
     * Enqueue admin styles
     */
    public function enqueue_admin_styles($hook) {
        if ('settings_page_whmcs-pricing' !== $hook) {
            return;
        }

        wp_enqueue_style(
            'whmcs-pricing-admin',
            WHMCS_PRICING_PLUGIN_URL . 'assets/css/admin.css',
            array(),
            WHMCS_PRICING_VERSION
        );
    }
}