upskill-event-manager/includes/class-hvac-trainer-profile-manager.php

<?php
/**
 * HVAC Trainer Profile Manager
 *
 * @package HVAC_Community_Events
 * @since 2.0.0
 */

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

/**
 * HVAC_Trainer_Profile_Manager class
 */
class HVAC_Trainer_Profile_Manager {
    
    /**
     * Constructor
     */
    public function __construct() {
        // Register shortcodes
        add_shortcode('hvac_trainer_profile_view', array($this, 'render_profile_view'));
        add_shortcode('hvac_trainer_profile_edit', array($this, 'render_profile_edit'));
        
        // Enqueue scripts
        add_action('wp_enqueue_scripts', array($this, 'enqueue_scripts'));
        
        // Handle AJAX requests
        add_action('wp_ajax_hvac_update_profile', array($this, 'ajax_update_profile'));
        add_action('wp_ajax_hvac_upload_profile_photo', array($this, 'ajax_upload_profile_photo'));
    }
    
    /**
     * Enqueue scripts and styles
     */
    public function enqueue_scripts() {
        if (is_page('trainer/profile') || is_page('trainer/profile/edit')) {
            wp_enqueue_style(
                'hvac-trainer-profile-style',
                HVAC_PLUGIN_URL . 'assets/css/hvac-trainer-profile.css',
                array(),
                HVAC_PLUGIN_VERSION
            );
            
            wp_enqueue_script(
                'hvac-trainer-profile-js',
                HVAC_PLUGIN_URL . 'assets/js/hvac-trainer-profile.js',
                array('jquery'),
                HVAC_PLUGIN_VERSION,
                true
            );
            
            wp_localize_script('hvac-trainer-profile-js', 'hvacProfile', array(
                'ajax_url' => admin_url('admin-ajax.php'),
                'nonce' => wp_create_nonce('hvac_profile_nonce')
            ));
            
            // Enqueue media uploader for profile photo
            if (is_page('trainer/profile/edit')) {
                wp_enqueue_media();
            }
        }
    }
    
    /**
     * Render profile view
     */
    public function render_profile_view() {
        if (!is_user_logged_in()) {
            return '<p>You must be logged in to view this page.</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>You must be a trainer to view this page.</p>';
        }
        
        $user_id = get_current_user_id();
        $user = get_userdata($user_id);
        
        // Get user meta
        $phone = get_user_meta($user_id, 'user_phone', true);
        $city = get_user_meta($user_id, 'user_city', true);
        $state = get_user_meta($user_id, 'user_state', true);
        $country = get_user_meta($user_id, 'user_country', true);
        $linkedin = get_user_meta($user_id, 'user_linkedin', true);
        $certifications = get_user_meta($user_id, 'trainer_certifications', true);
        $years_experience = get_user_meta($user_id, 'years_experience', true);
        $profile_photo_id = get_user_meta($user_id, 'profile_photo_id', true);
        $application_details = get_user_meta($user_id, 'application_details', true);
        $role = get_user_meta($user_id, 'role', true);
        $website = $user->user_url;
        
        // Get certification fields
        $date_certified = get_user_meta($user_id, 'date_certified', true);
        $certification_type = get_user_meta($user_id, 'certification_type', true);
        $certification_status = get_user_meta($user_id, 'certification_status', true);
        
        // Get organization info
        $organizer_id = get_user_meta($user_id, 'organizer_id', true);
        $organization = null;
        if ($organizer_id) {
            $organization = get_post($organizer_id);
        }
        
        ob_start();
        ?>
        <div class="hvac-trainer-profile-view">
            <div class="hvac-page-header">
                <h1>Trainer Profile</h1>
                <a href="/trainer/profile/edit/" class="hvac-button hvac-button-primary">Edit Profile</a>
            </div>
            
            <?php 
            if (class_exists('HVAC_Breadcrumbs')) {
                echo HVAC_Breadcrumbs::instance()->render_breadcrumbs();
            }
            ?>
            
            <div class="hvac-profile-content">
                <div class="hvac-profile-sidebar">
                    <div class="hvac-profile-photo">
                        <?php if ($profile_photo_id): ?>
                            <?php echo wp_get_attachment_image($profile_photo_id, 'medium', false, array('alt' => $user->display_name)); ?>
                        <?php else: ?>
                            <div class="hvac-profile-photo-placeholder">
                                <span><?php echo esc_html(substr($user->first_name, 0, 1) . substr($user->last_name, 0, 1)); ?></span>
                            </div>
                        <?php endif; ?>
                    </div>
                    
                    <div class="hvac-profile-stats">
                        <div class="hvac-stat-item">
                            <span class="hvac-stat-value"><?php echo $this->get_trainer_event_count($user_id); ?></span>
                            <span class="hvac-stat-label">Events Created</span>
                        </div>
                        <div class="hvac-stat-item">
                            <span class="hvac-stat-value"><?php echo $this->get_trainer_student_count($user_id); ?></span>
                            <span class="hvac-stat-label">Students Trained</span>
                        </div>
                        <?php if ($years_experience): ?>
                        <div class="hvac-stat-item">
                            <span class="hvac-stat-value"><?php echo esc_html($years_experience); ?></span>
                            <span class="hvac-stat-label">Years Experience</span>
                        </div>
                        <?php endif; ?>
                    </div>
                </div>
                
                <div class="hvac-profile-main">
                    <?php if ($date_certified || $certification_type || $certification_status): ?>
                    <div class="hvac-profile-section hvac-certification-section">
                        <h2>Certification Information</h2>
                        <div class="hvac-profile-details">
                            <?php if ($certification_status): ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Certification Status:</span>
                                <span class="hvac-detail-value hvac-cert-status hvac-cert-status-<?php echo esc_attr(strtolower($certification_status)); ?>">
                                    <?php echo esc_html($certification_status); ?>
                                </span>
                            </div>
                            <?php endif; ?>
                            <?php if ($certification_type): ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Certification Type:</span>
                                <span class="hvac-detail-value"><?php echo esc_html($certification_type); ?></span>
                            </div>
                            <?php endif; ?>
                            <?php if ($date_certified): ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Date Certified:</span>
                                <span class="hvac-detail-value"><?php echo esc_html(date('F j, Y', strtotime($date_certified))); ?></span>
                            </div>
                            <?php endif; ?>
                        </div>
                    </div>
                    <?php endif; ?>
                    
                    <div class="hvac-profile-section">
                        <h2>Personal Information</h2>
                        <div class="hvac-profile-details">
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Name:</span>
                                <span class="hvac-detail-value"><?php echo esc_html($user->first_name . ' ' . $user->last_name); ?></span>
                            </div>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Email:</span>
                                <span class="hvac-detail-value"><?php echo esc_html($user->user_email); ?></span>
                            </div>
                            <?php if ($role): ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Role:</span>
                                <span class="hvac-detail-value"><?php echo esc_html(ucfirst($role)); ?></span>
                            </div>
                            <?php endif; ?>
                            <?php if ($phone): ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Phone:</span>
                                <span class="hvac-detail-value"><?php echo esc_html($phone); ?></span>
                            </div>
                            <?php endif; ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Location:</span>
                                <span class="hvac-detail-value">
                                    <?php 
                                    $location_parts = array_filter(array($city, $state, $country));
                                    echo esc_html(implode(', ', $location_parts));
                                    ?>
                                </span>
                            </div>
                            <?php if ($linkedin): ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">LinkedIn:</span>
                                <span class="hvac-detail-value">
                                    <a href="<?php echo esc_url($linkedin); ?>" target="_blank">View Profile</a>
                                </span>
                            </div>
                            <?php endif; ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Website:</span>
                                <span class="hvac-detail-value">
                                    <?php if ($website): ?>
                                        <a href="<?php echo esc_url($website); ?>" target="_blank"><?php echo esc_html($website); ?></a>
                                    <?php else: ?>
                                        <span class="hvac-not-set">Not set</span>
                                    <?php endif; ?>
                                </span>
                            </div>
                            <?php if ($application_details): ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Application Details:</span>
                                <span class="hvac-detail-value"><?php echo esc_html($application_details); ?></span>
                            </div>
                            <?php endif; ?>
                        </div>
                    </div>
                    
                    <?php if (!empty($user->description)): ?>
                    <div class="hvac-profile-section">
                        <h2>About</h2>
                        <div class="hvac-profile-bio">
                            <?php echo wp_kses_post(wpautop($user->description)); ?>
                        </div>
                    </div>
                    <?php endif; ?>
                    
                    <?php if ($organization): ?>
                    <div class="hvac-profile-section">
                        <h2>Training Organization</h2>
                        <div class="hvac-profile-details">
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Organization:</span>
                                <span class="hvac-detail-value"><?php echo esc_html($organization->post_title); ?></span>
                            </div>
                            <?php
                            $org_city = get_post_meta($organizer_id, '_hvac_headquarters_city', true);
                            $org_state = get_post_meta($organizer_id, '_hvac_headquarters_state', true);
                            $org_country = get_post_meta($organizer_id, '_hvac_headquarters_country', true);
                            if ($org_city || $org_state || $org_country):
                            ?>
                            <div class="hvac-detail-row">
                                <span class="hvac-detail-label">Headquarters:</span>
                                <span class="hvac-detail-value">
                                    <?php 
                                    $hq_parts = array_filter(array($org_city, $org_state, $org_country));
                                    echo esc_html(implode(', ', $hq_parts));
                                    ?>
                                </span>
                            </div>
                            <?php endif; ?>
                        </div>
                    </div>
                    <?php endif; ?>
                    
                    <?php if ($certifications): ?>
                    <div class="hvac-profile-section">
                        <h2>Certifications</h2>
                        <div class="hvac-certifications-list">
                            <?php
                            $cert_array = is_array($certifications) ? $certifications : explode("\n", $certifications);
                            foreach ($cert_array as $cert):
                                if (trim($cert)):
                            ?>
                                <div class="hvac-certification-item">
                                    <i class="dashicons dashicons-awards"></i>
                                    <?php echo esc_html(trim($cert)); ?>
                                </div>
                            <?php 
                                endif;
                            endforeach;
                            ?>
                        </div>
                    </div>
                    <?php endif; ?>
                </div>
            </div>
        </div>
        <?php
        return ob_get_clean();
    }
    
    /**
     * Render profile edit form
     */
    public function render_profile_edit() {
        if (!is_user_logged_in()) {
            return '<p>You must be logged in to view this page.</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>You must be a trainer to view this page.</p>';
        }
        
        $user_id = get_current_user_id();
        $user = get_userdata($user_id);
        
        // Get user meta
        $phone = get_user_meta($user_id, 'user_phone', true);
        $city = get_user_meta($user_id, 'user_city', true);
        $state = get_user_meta($user_id, 'user_state', true);
        $country = get_user_meta($user_id, 'user_country', true);
        $linkedin = get_user_meta($user_id, 'user_linkedin', true);
        $website = $user->user_url;
        $certifications = get_user_meta($user_id, 'trainer_certifications', true);
        $years_experience = get_user_meta($user_id, 'years_experience', true);
        $profile_photo_id = get_user_meta($user_id, 'profile_photo_id', true);
        $application_details = get_user_meta($user_id, 'application_details', true);
        $role = get_user_meta($user_id, 'role', true);
        
        // Get certification fields
        $date_certified = get_user_meta($user_id, 'date_certified', true);
        $certification_type = get_user_meta($user_id, 'certification_type', true);
        $certification_status = get_user_meta($user_id, 'certification_status', true);
        
        // Check if current user can edit certification fields
        $current_user_id = get_current_user_id();
        $can_edit_certifications = current_user_can('administrator') || current_user_can('hvac_master_trainer');
        
        ob_start();
        ?>
        <div class="hvac-trainer-profile-edit">
            <div class="hvac-page-header">
                <h1>Edit Profile</h1>
            </div>
            
            <?php 
            if (class_exists('HVAC_Breadcrumbs')) {
                echo HVAC_Breadcrumbs::instance()->render_breadcrumbs();
            }
            ?>
            
            <form id="hvac-profile-form" class="hvac-form">
                <?php wp_nonce_field('hvac_profile_edit', 'hvac_profile_nonce'); ?>
                
                <?php if ($can_edit_certifications || $date_certified || $certification_type || $certification_status): ?>
                <div class="hvac-form-section hvac-certification-edit-section">
                    <h3>Certification Information 
                        <?php if (!$can_edit_certifications): ?>
                            <small class="hvac-read-only-note">(Read-only for trainers)</small>
                        <?php endif; ?>
                    </h3>
                    
                    <div class="hvac-form-row">
                        <label for="certification_status">Certification Status</label>
                        <?php if ($can_edit_certifications): ?>
                        <select id="certification_status" name="certification_status">
                            <option value="">Select Status</option>
                            <?php
                            $status_options = [
                                'Active' => 'Active',
                                'Expired' => 'Expired',
                                'Pending' => 'Pending',
                                'Disabled' => 'Disabled'
                            ];
                            foreach ($status_options as $value => $label) {
                                printf(
                                    '<option value="%s" %s>%s</option>',
                                    esc_attr($value),
                                    selected($certification_status, $value, false),
                                    esc_html($label)
                                );
                            }
                            ?>
                        </select>
                        <?php else: ?>
                        <div class="hvac-read-only-field"><?php echo esc_html($certification_status ?: 'Not set'); ?></div>
                        <input type="hidden" name="certification_status" value="<?php echo esc_attr($certification_status); ?>" />
                        <?php endif; ?>
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="certification_type">Certification Type</label>
                        <?php if ($can_edit_certifications): ?>
                        <select id="certification_type" name="certification_type">
                            <option value="">Select Type</option>
                            <?php
                            $type_options = [
                                'Certified measureQuick Trainer' => 'Certified measureQuick Trainer',
                                'Certified measureQuick Champion' => 'Certified measureQuick Champion'
                            ];
                            foreach ($type_options as $value => $label) {
                                printf(
                                    '<option value="%s" %s>%s</option>',
                                    esc_attr($value),
                                    selected($certification_type, $value, false),
                                    esc_html($label)
                                );
                            }
                            ?>
                        </select>
                        <?php else: ?>
                        <div class="hvac-read-only-field"><?php echo esc_html($certification_type ?: 'Not set'); ?></div>
                        <input type="hidden" name="certification_type" value="<?php echo esc_attr($certification_type); ?>" />
                        <?php endif; ?>
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="date_certified">Date Certified</label>
                        <?php if ($can_edit_certifications): ?>
                        <input type="date" id="date_certified" name="date_certified" 
                               value="<?php echo esc_attr($date_certified); ?>" />
                        <?php else: ?>
                        <div class="hvac-read-only-field">
                            <?php echo $date_certified ? esc_html(date('F j, Y', strtotime($date_certified))) : 'Not set'; ?>
                        </div>
                        <input type="hidden" name="date_certified" value="<?php echo esc_attr($date_certified); ?>" />
                        <?php endif; ?>
                    </div>
                </div>
                <?php endif; ?>
                
                <div class="hvac-form-section">
                    <h3>Profile Photo</h3>
                    <div class="hvac-profile-photo-upload">
                        <div class="hvac-current-photo">
                            <?php if ($profile_photo_id): ?>
                                <?php echo wp_get_attachment_image($profile_photo_id, 'thumbnail'); ?>
                            <?php else: ?>
                                <div class="hvac-photo-placeholder">No photo uploaded</div>
                            <?php endif; ?>
                        </div>
                        <div class="hvac-photo-actions">
                            <button type="button" id="hvac-upload-photo" class="hvac-button hvac-button-secondary">
                                <?php echo $profile_photo_id ? 'Change Photo' : 'Upload Photo'; ?>
                            </button>
                            <?php if ($profile_photo_id): ?>
                                <button type="button" id="hvac-remove-photo" class="hvac-button hvac-button-danger-outline">
                                    Remove Photo
                                </button>
                            <?php endif; ?>
                            <input type="hidden" id="profile_photo_id" name="profile_photo_id" value="<?php echo $profile_photo_id; ?>" />
                        </div>
                    </div>
                </div>
                
                <div class="hvac-form-section">
                    <h3>Personal Information</h3>
                    
                    <div class="hvac-form-row hvac-form-row-half">
                        <div>
                            <label for="first_name">First Name *</label>
                            <input type="text" id="first_name" name="first_name" required
                                   value="<?php echo esc_attr($user->first_name); ?>" />
                        </div>
                        <div>
                            <label for="last_name">Last Name *</label>
                            <input type="text" id="last_name" name="last_name" required
                                   value="<?php echo esc_attr($user->last_name); ?>" />
                        </div>
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="display_name">Display Name *</label>
                        <input type="text" id="display_name" name="display_name" required
                               value="<?php echo esc_attr($user->display_name); ?>" />
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="email">Email Address *</label>
                        <input type="email" id="email" name="email" required
                               value="<?php echo esc_attr($user->user_email); ?>" />
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="role">Role *</label>
                        <small>What is your primary role in the HVAC industry?</small>
                        <select id="role" name="role" required>
                            <option value="">Select Role</option>
                            <?php
                            $role_options = [
                                "technician" => "Technician",
                                "installer" => "Installer", 
                                "supervisor" => "Supervisor",
                                "manager" => "Manager",
                                "trainer" => "Trainer",
                                "consultant" => "Consultant",
                                "sales" => "Sales Representative",
                                "engineer" => "Engineer",
                                "owner" => "Business Owner",
                                "other" => "Other"
                            ];
                            foreach ($role_options as $value => $label) {
                                printf(
                                    '<option value="%s" %s>%s</option>',
                                    esc_attr($value),
                                    selected($role, $value, false),
                                    esc_html($label)
                                );
                            }
                            ?>
                        </select>
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="phone">Phone Number</label>
                        <input type="tel" id="phone" name="phone"
                               value="<?php echo esc_attr($phone); ?>" />
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="description">Bio / About</label>
                        <textarea id="description" name="description" rows="5"><?php echo esc_textarea($user->description); ?></textarea>
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="application_details">Application Details</label>
                        <small>Why you want to create a training account on Upskill HVAC</small>
                        <textarea id="application_details" name="application_details" rows="5"><?php echo esc_textarea($application_details); ?></textarea>
                    </div>
                </div>
                
                <div class="hvac-form-section">
                    <h3>Location</h3>
                    
                    <div class="hvac-form-row">
                        <label for="city">City</label>
                        <input type="text" id="city" name="city"
                               value="<?php echo esc_attr($city); ?>" />
                    </div>
                    
                    <div class="hvac-form-row hvac-form-row-half">
                        <div>
                            <label for="state">State/Province</label>
                            <input type="text" id="state" name="state"
                                   value="<?php echo esc_attr($state); ?>" />
                        </div>
                        <div>
                            <label for="country">Country</label>
                            <select id="country" name="country">
                                <option value="">Select Country</option>
                                <?php
                                $countries = array(
                                    'United States' => 'United States',
                                    'Canada' => 'Canada',
                                    'United Kingdom' => 'United Kingdom',
                                    'Australia' => 'Australia'
                                );
                                
                                foreach ($countries as $code => $name) {
                                    printf(
                                        '<option value="%s" %s>%s</option>',
                                        esc_attr($code),
                                        selected($country, $code, false),
                                        esc_html($name)
                                    );
                                }
                                ?>
                            </select>
                        </div>
                    </div>
                </div>
                
                <div class="hvac-form-section">
                    <h3>Professional Information</h3>
                    
                    <div class="hvac-form-row">
                        <label for="years_experience">Years of Experience</label>
                        <input type="number" id="years_experience" name="years_experience" min="0" max="50"
                               value="<?php echo esc_attr($years_experience); ?>" />
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="certifications">Certifications (one per line)</label>
                        <textarea id="certifications" name="certifications" rows="5"><?php echo esc_textarea($certifications); ?></textarea>
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="website">Website</label>
                        <input type="url" id="website" name="website"
                               value="<?php echo esc_attr($website); ?>" />
                    </div>
                    
                    <div class="hvac-form-row">
                        <label for="linkedin">LinkedIn Profile</label>
                        <input type="url" id="linkedin" name="linkedin"
                               value="<?php echo esc_attr($linkedin); ?>" />
                    </div>
                </div>
                
                <div class="hvac-form-actions">
                    <button type="submit" class="hvac-button hvac-button-primary">Save Changes</button>
                    <a href="/trainer/profile/" class="hvac-button hvac-button-secondary">Cancel</a>
                </div>
            </form>
        </div>
        <?php
        return ob_get_clean();
    }
    
    /**
     * AJAX handler for updating profile
     */
    public function ajax_update_profile() {
        check_ajax_referer('hvac_profile_nonce', 'nonce');
        
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            wp_send_json_error('Unauthorized');
        }
        
        $user_id = get_current_user_id();
        
        // Update user data
        $user_data = array(
            'ID' => $user_id,
            'first_name' => sanitize_text_field($_POST['first_name']),
            'last_name' => sanitize_text_field($_POST['last_name']),
            'display_name' => sanitize_text_field($_POST['display_name']),
            'user_email' => sanitize_email($_POST['email']),
            'user_url' => esc_url_raw($_POST['website']),
            'description' => wp_kses_post($_POST['description'])
        );
        
        $result = wp_update_user($user_data);
        
        if (is_wp_error($result)) {
            wp_send_json_error($result->get_error_message());
        }
        
        // Update user meta
        update_user_meta($user_id, 'user_phone', sanitize_text_field($_POST['phone']));
        update_user_meta($user_id, 'user_city', sanitize_text_field($_POST['city']));
        update_user_meta($user_id, 'user_state', sanitize_text_field($_POST['state']));
        update_user_meta($user_id, 'user_country', sanitize_text_field($_POST['country']));
        update_user_meta($user_id, 'user_linkedin', esc_url_raw($_POST['linkedin']));
        update_user_meta($user_id, 'years_experience', intval($_POST['years_experience']));
        update_user_meta($user_id, 'trainer_certifications', sanitize_textarea_field($_POST['certifications']));
        update_user_meta($user_id, 'application_details', sanitize_textarea_field($_POST['application_details']));
        update_user_meta($user_id, 'role', sanitize_text_field($_POST['role']));
        
        // Update certification fields (only if user has permission)
        if (current_user_can('administrator') || current_user_can('hvac_master_trainer')) {
            update_user_meta($user_id, 'date_certified', sanitize_text_field($_POST['date_certified']));
            update_user_meta($user_id, 'certification_type', sanitize_text_field($_POST['certification_type']));
            update_user_meta($user_id, 'certification_status', sanitize_text_field($_POST['certification_status']));
        }
        
        // Update profile photo if changed
        if (isset($_POST['profile_photo_id'])) {
            update_user_meta($user_id, 'profile_photo_id', intval($_POST['profile_photo_id']));
        }
        
        wp_send_json_success('Profile updated successfully.');
    }
    
    /**
     * AJAX handler for uploading profile photo
     */
    public function ajax_upload_profile_photo() {
        check_ajax_referer('hvac_profile_nonce', 'nonce');
        
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            wp_send_json_error('Unauthorized');
        }
        
        if (!isset($_FILES['profile_photo'])) {
            wp_send_json_error('No file uploaded');
        }
        
        require_once(ABSPATH . 'wp-admin/includes/image.php');
        require_once(ABSPATH . 'wp-admin/includes/file.php');
        require_once(ABSPATH . 'wp-admin/includes/media.php');
        
        $attachment_id = media_handle_upload('profile_photo', 0);
        
        if (is_wp_error($attachment_id)) {
            wp_send_json_error($attachment_id->get_error_message());
        }
        
        // Update user meta
        update_user_meta(get_current_user_id(), 'profile_photo_id', $attachment_id);
        
        wp_send_json_success(array(
            'attachment_id' => $attachment_id,
            'url' => wp_get_attachment_image_url($attachment_id, 'thumbnail')
        ));
    }
    
    /**
     * Get trainer event count
     */
    private function get_trainer_event_count($user_id) {
        $post_type = class_exists('Tribe__Events__Main') ? Tribe__Events__Main::POSTTYPE : 'tribe_events';
        
        $count = count_user_posts($user_id, $post_type);
        
        return $count;
    }
    
    /**
     * Get trainer student count
     */
    private function get_trainer_student_count($user_id) {
        global $wpdb;
        
        // Get all events by this trainer
        $post_type = class_exists('Tribe__Events__Main') ? Tribe__Events__Main::POSTTYPE : 'tribe_events';
        
        $events = get_posts(array(
            'post_type' => $post_type,
            'author' => $user_id,
            'posts_per_page' => -1,
            'fields' => 'ids'
        ));
        
        if (empty($events)) {
            return 0;
        }
        
        // Count attendees across all events
        $attendee_count = 0;
        foreach ($events as $event_id) {
            $attendees = get_post_meta($event_id, '_tribe_tickets_attendees', true);
            if (is_array($attendees)) {
                $attendee_count += count($attendees);
            }
        }
        
        return $attendee_count;
    }
}