# Permission Hierarchy System - Implementation Complete ✅

## What Was Built

A comprehensive **three-tier permission hierarchy system** for managing sub-admin access to features.

### Permission Levels

| Level | View | Create | Edit | Delete |
|-------|------|--------|------|--------|
| **Viewer** 👁️ | ✅ | ❌ | ❌ | ❌ |
| **Editor** ✏️ | ✅ | ✅ | ✅ | ❌ |
| **Administrator** 👑 | ✅ | ✅ | ✅ | ✅ |

---

## New Files Created

### 1. **helpers/permission_helper.php**
Core permission checking system with static methods:
- `can($feature, $action, $permissions)` - Check specific action
- `hasAccess($feature, $permissions)` - Check general access
- `getLevel($feature, $permissions)` - Get permission level
- `getAccessibleFeatures($permissions)` - Get all accessible features

### 2. **helpers/subadmin_actions.php**
Action enforcement for sub-admin pages:
- `checkAction($feature, $action, $permissions)` - Returns detailed response
- `enforceSilent($feature, $action, $permissions)` - Exit if not allowed
- `getCapabilities($feature, $permissions)` - Get all capabilities

### 3. **PERMISSION_HIERARCHY_README.md**
Complete documentation with usage examples and integration guide

---

## Updated Files

### **admin_subadmins.php** 
Major improvements:
- ✅ Replaced checkboxes with **dropdown permission hierarchy table**
- ✅ Each feature shows: Feature name | Permission Level selector
- ✅ Dropdowns for each feature: None, Viewer, Editor, Administrator
- ✅ Better visual display of existing sub-admin permissions with color-coded levels
- ✅ Updated edit function to handle new permission structure
- ✅ Added helpful legend explaining permission levels

**UI Enhancement:**
```
Feature Name          | Permission Level
─────────────────────┼──────────────────
Site Title            | [Dropdown: None/Viewer/Editor/Admin]
Products              | [Dropdown: None/Viewer/Editor/Admin]
Orders                | [Dropdown: None/Viewer/Editor/Admin]
... (all 25 features)
```

### **subadmin_dashboard.php**
Entirely refactored:
- ✅ Integrated `PermissionHelper` for permission checking
- ✅ Displays all accessible features with **color-coded badges**
- ✅ Shows permission level for each feature
- ✅ Better styling and UX
- ✅ Backward compatibility with old boolean permissions (auto-converts to 'editor')
- ✅ New `can()`, `hasAccess()`, and `getLevel()` helper functions

**Color Coding:**
- 🔵 **Blue (Viewer)** = Read-only access
- 🟠 **Orange (Editor)** = View, create, edit
- 🟢 **Green (Administrator)** = Full access

---

## How It Works

### Admin Setting Permissions

1. Admin goes to **Manage Sub-admins** page
2. Selects a user
3. For EACH feature, chooses permission level:
   - **None** = No access
   - **Viewer** = View only
   - **Editor** = View, Create, Edit (no delete)
   - **Administrator** = Full control

### Sub-Admin Accessing Features

1. Sub-admin logs in
2. Dashboard shows available features with permission levels
3. Each feature card is color-coded by permission:
   - Blue card = Can only view
   - Orange card = Can view, create, edit
   - Green card = Full access

4. When clicking a feature, the system passes permission level to that page
5. The page can use `SubAdminActions` to enforce permissions

### Enforcement Example

```php
// In any sub-admin page handling deletes:
require_once __DIR__ . '/helpers/subadmin_actions.php';

if ($_POST['action'] === 'delete') {
    // This will exit with 403 error if not allowed
    SubAdminActions::enforceSilent('manage_products', 'delete', $_SESSION['subadmin_permissions']);
    
    // If we reach here, deletion is authorized
    // Proceed with delete logic...
}
```

---

## 25 Features with Hierarchy Support

All major admin features now support permission hierarchy:

1. Site Title
2. Logo
3. Slider Images
4. Header/Footer Colors
5. Categories
6. Pages
7. Social Media
8. Blogs
9. Products
10. Users
11. Sub-admins
12. Orders
13. News/Banners
14. Marquee Text
15. Footer Marquee
16. Featured Categories
17. Carousel Categories
18. Slider Settings
19. Awards
20. Latest Products
21. Video Section
22. Footer Settings
23. SEO Manager
24. Homepage Features
25. General Settings

---

## Data Structure

### Storage Format (data/subadmins.json)

```json
{
  "2": {
    "user_id": 2,
    "display_name": "Editor User",
    "permissions": {
      "manage_products": "editor",
      "manage_blogs": "viewer",
      "manage_users": "administrator",
      "manage_orders": "none"
    },
    "updated_at": "2024-01-15T10:30:00+00:00"
  }
}
```

---

## Backward Compatibility

✅ **Automatically converts old permissions:**
- Old boolean `true` → New `'editor'`
- Old boolean `false` → New `'none'`

Existing sub-admin accounts continue working seamlessly!

---

## Integration Steps (For Developers)

To add permission enforcement to an existing sub-admin page:

### Step 1: Include the helper
```php
require_once __DIR__ . '/helpers/subadmin_actions.php';
```

### Step 2: Enforce permissions in API handlers
```php
// For DELETE operations
SubAdminActions::enforceSilent('manage_products', 'delete', $_SESSION['subadmin_permissions']);

// For EDIT operations
SubAdminActions::enforceSilent('manage_products', 'edit', $_SESSION['subadmin_permissions']);

// For CREATE operations
SubAdminActions::enforceSilent('manage_products', 'create', $_SESSION['subadmin_permissions']);
```

### Step 3: Hide UI elements based on permissions
```php
<?php
$caps = SubAdminActions::getCapabilities('manage_products', $_SESSION['subadmin_permissions']);
?>

<?php if ($caps['can_delete']): ?>
    <button class="delete-btn">Delete Product</button>
<?php endif; ?>

<?php if ($caps['can_edit']): ?>
    <button class="edit-btn">Edit Product</button>
<?php endif; ?>
```

---

## Key Features

✅ **Three-Tier Hierarchy** - Viewer, Editor, Administrator
✅ **Table-Based UI** - Easy to see and manage permissions
✅ **Color Coding** - Visual permission level identification
✅ **Backward Compatible** - Auto-converts old boolean permissions
✅ **Reusable Helpers** - Easy integration in any sub-admin page
✅ **Enforcement System** - Prevents unauthorized actions
✅ **Session Persistence** - Permissions loaded on login
✅ **25 Features** - All major admin features supported
✅ **Comprehensive Docs** - Full usage documentation included

---

## Testing the System

1. **Create Sub-Admin with Mixed Permissions:**
   - Products: Editor
   - Blogs: Viewer
   - Users: Administrator
   - News: None

2. **Login as Sub-Admin:**
   - Dashboard should show colored cards
   - Only Products, Blogs, Users cards visible

3. **Test Enforcement:**
   - Try deleting a product → Should FAIL (editors can't delete)
   - Try editing a blog → Should FAIL (viewers can't edit)
   - Try deleting a user → Should SUCCEED (administrator)

---

## No Existing Functionality Disrupted ✅

Since this is a permission layer added on top of existing pages:
- All current admin pages continue working
- Sub-admin dashboard works with both old and new permission formats
- Optional integration for existing sub-admin pages
- Backward compatible with existing sub-admin accounts

---

## Questions or Issues?

Refer to `PERMISSION_HIERARCHY_README.md` for:
- Detailed usage examples
- Integration guide for developers
- Troubleshooting guide
- Future enhancement suggestions
