Bookshelf/umbra-bookshelf/includes/books/class-umbra-gdpr.php

<?php
// Copyright 2026 Umbra Tools (umbratools.com)
// SPDX-License-Identifier: Apache-2.0

/**
 * GDPR Compliance class
 *
 * @package Umbra_Bookshelf
 */

if (!defined('ABSPATH')) {
    exit;
}

class Umbra_GDPR {

    /**
     * Constructor
     */
    public function __construct() {
        add_action('wp_footer', [$this, 'render_consent_banner']);
        add_action('wp_enqueue_scripts', [$this, 'enqueue_scripts']);
        
        // AJAX handlers
        add_action('wp_ajax_bd_bookshelf_accept_consent', [$this, 'ajax_accept_consent']);
        add_action('wp_ajax_nopriv_bd_bookshelf_accept_consent', [$this, 'ajax_accept_consent']);
    }

    /**
     * Enqueue GDPR scripts
     */
    public function enqueue_scripts() {
        if (is_admin()) {
            return;
        }

        wp_enqueue_script(
            'umbra-bookshelf-gdpr',
            UMBRA_BOOKSHELF_URL . 'public/js/umbra-bookshelf-gdpr.js',
            [],
            UMBRA_BOOKSHELF_VERSION,
            true
        );

        wp_localize_script('umbra-bookshelf-gdpr', 'umbraBookshelfGdpr', [
            'ajaxurl' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('bd_bookshelf_gdpr_nonce'),
            'cookieDays' => 30,
        ]);
    }

    /**
     * Render consent banner
     */
    public function render_consent_banner() {
        if (is_admin()) {
            return;
        }

        if ($this->has_consent()) {
            return;
        }

        $privacy_page_url = $this->get_privacy_page_url();
        $privacy_text = get_option('bd_bookshelf_gdpr_text', 
            'We use cookies for affiliate tracking only. By clicking "Accept", you agree to our use of cookies as described in our <a href="' . esc_url($privacy_page_url) . '" target="_blank">Privacy Policy</a>.'
        );

        echo '<div id="bd-bookshelf-gdpr-banner" class="bd-bookshelf-gdpr-banner">';
        echo '<div class="bd-bookshelf-gdpr-content">';
        echo '<p>' . wp_kses_post($privacy_text) . '</p>';
        echo '<button id="bd-bookshelf-gdpr-accept" class="bd-bookshelf-gdpr-accept">' . esc_html__('Accept', 'umbra-bookshelf') . '</button>';
        echo '</div>';
        echo '</div>';
    }

    /**
     * Check if user has given consent
     */
    public static function has_consent() {
        if (isset($_COOKIE['bd_bookshelf_consent'])) {
            return true;
        }
        
        return false;
    }

    /**
     * AJAX handler for accepting consent
     */
    public function ajax_accept_consent() {
        check_ajax_referer('bd_bookshelf_gdpr_nonce', 'nonce');
        
        // Set consent cookie (30 days)
        setcookie('bd_bookshelf_consent', '1', time() + (30 * DAY_IN_SECONDS), '/');
        
        wp_send_json_success(['message' => 'Consent accepted']);
    }

    /**
     * Get privacy page URL
     */
    private function get_privacy_page_url() {
        $privacy_page_id = get_option('wp_page_for_privacy_policy');
        
        if ($privacy_page_id) {
            return get_permalink($privacy_page_id);
        }
        
        return '#';
    }

    /**
     * Get GDPR consent banner text
     */
    public static function get_consent_text() {
        return get_option('bd_bookshelf_gdpr_text', '');
    }

    /**
     * Update GDPR consent banner text
     */
    public static function update_consent_text($text) {
        update_option('bd_bookshelf_gdpr_text', sanitize_text_field($text));
    }
}