upskill-event-manager/includes/class-hvac-template-integration.php

<?php
/**
 * HVAC Template Integration
 *
 * Handles the integration of navigation and breadcrumbs into trainer pages
 */

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

class HVAC_Template_Integration {
    
    /**
     * Instance of this class
     */
    private static $instance = null;
    
    /**
     * Get instance
     */
    public static function instance() {
        if (is_null(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    /**
     * Constructor
     */
    public function __construct() {
        add_action('init', array($this, 'init'));
    }
    
    /**
     * Initialize
     */
    public function init() {
        // Add navigation and breadcrumbs to trainer pages
        add_action('wp', array($this, 'setup_template_integration'));
    }
    
    /**
     * Setup template integration based on current page
     */
    public function setup_template_integration() {
        // Check if we're on a trainer page
        if ($this->is_trainer_page()) {
            // Use proper WordPress content filtering
            add_filter('the_content', array($this, 'add_navigation_to_content'), 1);
        }
    }
    
    /**
     * Check if current page is a trainer page
     */
    private function is_trainer_page() {
        global $wp;
        
        // Get current URL path
        $current_url = home_url(add_query_arg(array(), $wp->request));
        
        // Check if URL contains /trainer/ but not /master-trainer/
        return (strpos($current_url, '/trainer/') !== false && strpos($current_url, '/master-trainer/') === false);
    }
    
    /**
     * Render navigation and breadcrumbs
     */
    public function render_navigation_and_breadcrumbs() {
        // Prevent duplicate rendering
        static $rendered = false;
        if ($rendered) {
            return;
        }
        $rendered = true;
        
        // Check if user has trainer capabilities
        if (!current_user_can('hvac_trainer')) {
            return;
        }
        
        ?>
        <div class="hvac-template-integration-wrapper">
            <?php
            // Render navigation if class exists
            if (class_exists('HVAC_Trainer_Navigation')) {
                $nav = new HVAC_Trainer_Navigation();
                echo $nav->render_navigation();
            }
            
            // Render breadcrumbs if class exists
            if (class_exists('HVAC_Breadcrumbs')) {
                $breadcrumbs = new HVAC_Breadcrumbs();
                echo $breadcrumbs->render_breadcrumbs();
            }
            ?>
        </div>
        <?php
    }
    
    
    /**
     * Alternative method to add navigation via shortcode in content
     */
    public function add_navigation_to_content($content) {
        if ($this->is_trainer_page() && current_user_can('hvac_trainer')) {
            $nav_content = '';
            
            // Add navigation before content
            ob_start();
            $this->render_navigation_and_breadcrumbs();
            $nav_content = ob_get_clean();
            
            $content = $nav_content . $content;
        }
        
        return $content;
    }
}

// Initialize
HVAC_Template_Integration::instance();