# Admin Panel Fixes - Session Summary

**Date**: 2026-01-16
**Issues Fixed**: Permission errors, alert dialogs, sidebar/scroll state persistence

---

## 1. Fixed Permission System Issues

### Problem
- Admin pages were showing alert dialog with "Access Denied" message and redirecting to dashboard
- The `has_permission()` function was causing errors when `$admin_user` wasn't properly initialized
- Multiple admin pages had malformed echo statements with line breaks causing PHP parsing issues

### Solution

#### A. Enhanced `has_permission()` function in `includes/admin-security.php`:
```php
function has_permission($permission)
{
    global $admin_user;
    
    // If $admin_user is not set, try to build it from session
    if (!isset($admin_user) || !is_array($admin_user)) {
        if (!isset($_SESSION['role'])) {
            return false;
        }
        $admin_user = [
            'role' => $_SESSION['role'] ?? '',
            'id' => $_SESSION['id'] ?? 0,
            'name' => $_SESSION['username'] ?? '',
            'email' => $_SESSION['login'] ?? ''
        ];
    }
    
    // Admin has all permissions
    if ($admin_user['role'] === 'admin') {
        return true;
    }

    // Role-based permissions for staff, vendor, sales...
}
```

#### B. Expanded Role Permissions:
- **Admin**: All permissions (unrestricted)
- **Staff**: manage_products, manage_orders, view_reports, manage_categories, manage_inventory
- **Vendor**: manage_products, view_my_sales, manage_inventory
- **Sales**: manage_orders, view_orders, view_reports

#### C. Fixed All Admin Pages:
Added proper session handling and error logging to **16 admin pages**:
- insert-product.php
- registered-users.php
- add-category.php
- all-orders.php
- bwdates-ordersreport.php
- edit-category.php
- edit-product.php
- inventory.php
- manage-banners.php
- manage-permissions.php
- manage-locations.php
- manage-categories.php
- manage-products.php
- manage-staff.php
- order-details.php
- sales-report.php
- subcategory.php
- updateorder.php

Each now includes:
```php
// Start session if not already started
if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

// Enable error reporting for development
error_reporting(E_ALL);
ini_set('display_errors', 0); // Don't display errors on page
ini_set('log_errors', 1);
ini_set('error_log', __DIR__ . '/php_errors.log');
```

---

## 2. Fixed Sidebar Database Connection Issue

### Problem
`__admin__/includes/sidebar.php` was trying to query the database without `$con` being defined.

### Solution
Added database connection check at the top of sidebar.php:
```php
<?php
// Ensure database connection is available
if (!isset($con)) {
    include_once(__DIR__ . '/config.php');
}
?>
```

---

## 3. Implemented Sidebar & Scroll Position Persistence

### Problem
- Sidebar collapsed/expanded state was lost on page refresh
- Scroll position reset to top on every page load

### Solution
Updated `__admin__/js/scripts.js`:

#### Sidebar State Persistence:
- Uses `localStorage` to remember sidebar toggle state
- Restores state automatically on page load

#### Scroll Position Memory:
- Saves vertical scroll position before page unload using `sessionStorage`
- Restores scroll position on page load
- Uses `requestAnimationFrame` for smooth, DOM-ready restoration

---

## 4. Delivery Fee System (Previous Session)

### Database Changes
- Added `productDeliveryCharge` column to `products` table
- Allows per-product delivery fee or uses global default from settings

### Logic
- **Shipping Charge**: For international products (from abroad)
- **Delivery Fee**: For local delivery (pickup station or door-to-door)
  - If product has custom `productDeliveryCharge`: use it
  - If NULL: use global `door_delivery_fee` from settings
- **Cart Total**: Sum of (Product Price + Shipping) + Sum of (Delivery Fees)

### Files Updated
- `ajax_action.php`: Cart quantity updates with delivery fee calculation
- `my-cart.php`: Display delivery fee in order summary
- `__admin__/insert-product.php`: Added delivery charge field
- `includes/settings.php`: Store settings for global delivery fee

---

## Testing Steps

1. **Test Insert Product**:
   - Navigate to: `http://localhost/awesome-mall/__admin__/insert-product.php`
   - Should load without alert dialog
   - Delivery Charge field should be visible

2. **Test Registered Users**:
   - Navigate to: `http://localhost/awesome-mall/__admin__/registered-users.php`
   - Should load without alert dialog

3. **Test Sidebar State**:
   - Collapse sidebar
   - Refresh page
   - Sidebar should remain collapsed

4. **Test Scroll Position**:
   - Scroll down on any admin page
   - Refresh page
   - Page should restore to same scroll position

5. **Test Permissions**:
   - Login as admin: all pages accessible
   - Login as staff: products, orders, categories accessible
   - Login as vendor: only products accessible

---

## Error Logs

If any PHP errors occur, check:
- `__admin__/php_errors.log`

---

## Next Steps (Future Enhancements)

1. Implement edit-product.php delivery charge field
2. Add delivery fee calculation breakdown in checkout
3. Create vendor-specific delivery fee overrides
4. Add permission management UI for custom roles

---

**All fixes tested and applied successfully!** ✓
