# Master Trainer Permission & Navigation Fixes
**Date**: June 17, 2025  
**Developer**: Ben Reed (ben@tealmaker.com)

## Overview
This document summarizes the fixes applied to resolve Master Trainer permission issues, AJAX errors, and navigation problems reported by the user.

## Issues Fixed

### 1. Master Dashboard AJAX 400 Error ✅
**Problem**: Master dashboard was making AJAX call to `hvac_master_dashboard_events` but no handler existed.

**Solution**: 
- Added missing AJAX handler registration in `includes/class-hvac-community-events.php`
- Added `ajax_master_dashboard_events()` method to handle the AJAX request
- The handler properly checks permissions and returns events table data

**Files Modified**:
- `includes/class-hvac-community-events.php`

### 2. Google Sheets Folder Verification JSON Error ✅  
**Problem**: AJAX call returned "JSON.parse: unexpected character" error.

**Solution**:
- Fixed incorrect file path in `ajax_verify_folder_structure()` method
- Added error handling and output buffering
- Temporarily returns mock data until Google Sheets auth is configured
- Prevents PHP errors from breaking JSON response

**Files Modified**:
- `includes/google-sheets/class-google-sheets-admin.php`

### 3. Certificate Reports Permission Error ✅
**Problem**: Master trainers saw "You do not have permission to view certificate reports."

**Solution**:
- Fixed capability check from `current_user_can('hvac_trainer')` to `current_user_can('manage_hvac_events')`
- Master trainers have the `manage_hvac_events` capability

**Files Modified**:
- `includes/class-hvac-community-events.php`

### 4. Navigation Links to Old URLs ✅
**Problem**: Links throughout the plugin pointed to old URLs like `/hvac-dashboard/` instead of new hierarchical URLs.

**Solution**:
- Updated 44+ URL references in template files
- Updated all URLs in includes directory
- Fixed hardcoded links
- Implemented proper URL mapping:
  - `/hvac-dashboard/` → `/trainer/dashboard/`
  - `/certificate-reports/` → `/trainer/certificate-reports/`
  - `/generate-certificates/` → `/trainer/generate-certificates/`
  - And many more...

**Files Modified**:
- All template files in `templates/` directory
- Multiple files in `includes/` directory
- `clear-test-certificates.php`

### 5. Duplicate/Legacy WordPress Pages ✅
**Problem**: Multiple duplicate pages existed with old slugs causing confusion.

**Solution**:
- Deleted 11 duplicate pages (IDs: 5297, 5298, 5299, 5300, 5502, 5503, 5504, 5505, 5517, 5518, 5519)
- Kept only the properly structured hierarchical pages
- Legacy redirect system handles old URLs automatically

### 6. Google Sheets Redirect Loop ✅
**Problem**: `/master-trainer/google-sheets/` was causing infinite redirect loop.

**Solution**:
- Added redirect loop prevention in `hvac_ce_handle_legacy_redirects()` function
- Checks if already on target path before redirecting
- Fixed OAuth callback redirect URLs

**Files Modified**:
- `hvac-community-events.php`
- `includes/google-sheets/class-google-sheets-auth.php`

### 7. Profile Edit Link ✅  
**Problem**: "Edit Profile" button opened wp-admin in new tab.

**Solution**:
- Removed `target="_blank"` from edit profile link
- Now opens in same tab for better UX

**Files Modified**:
- `templates/template-trainer-profile.php`

### 8. Master Dashboard Template Rendering ✅
**Problem**: Master dashboard had jQuery undefined errors and Quirks Mode.

**Solution**:
- Added missing `get_header()` call for authenticated users
- Fixed template structure to include proper WordPress header

**Files Modified**:
- `templates/template-hvac-master-dashboard.php`

## Technical Details

### AJAX Handler Implementation
```php
public function ajax_master_dashboard_events() {
    check_ajax_referer('hvac_master_dashboard_nonce', 'nonce');
    
    if (!current_user_can('view_master_dashboard')) {
        wp_die('Insufficient permissions');
    }
    
    // Load master dashboard data class
    if (!class_exists('HVAC_Master_Dashboard_Data')) {
        require_once HVAC_CE_PLUGIN_DIR . 'includes/class-hvac-master-dashboard-data.php';
    }
    
    $dashboard_data = new HVAC_Master_Dashboard_Data();
    $data = $dashboard_data->get_events_table_data($args);
    
    wp_send_json_success($data);
}
```

### Redirect Loop Prevention
```php
// Get current URL path to prevent redirect loops
$current_path = trim(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH), '/');
$target_path = $legacy_redirects[$current_slug];

// Skip redirect if we are already on the target path
if ($current_path === $target_path) {
    return;
}
```

## Testing Recommendations

1. **Master Dashboard**: Verify events table loads without AJAX errors
2. **Google Sheets**: Check that folder verification shows appropriate message
3. **Certificate Reports**: Confirm master trainers can access reports
4. **Navigation**: Test all navigation links go to correct hierarchical URLs
5. **Legacy URLs**: Verify old URLs redirect properly to new ones

## Pending Issues

1. **Trainer Documentation Login**: Still showing "Please log in to access the documentation" - may need further investigation
2. **Google Sheets Authentication**: Full folder verification will work once OAuth is configured

## Deployment Notes

- All changes are live on staging server
- WordPress cache has been flushed
- No database schema changes required
- Backward compatibility maintained through redirect system