# User Files Privacy Implementation

## Overview
Folders and files created in the "User Files" context are now **automatically private** and owned by the creator.

## How It Works

### Folder Creation
When you create a folder in "User Files":
- **Owner**: Automatically set to the user who created it (`owner_id`)
- **Access Level**: Automatically set to `private`
- **Visibility**: Only visible to:
  - The owner (creator)
  - Administrators
  - Users it's explicitly shared with

### File Upload
When you upload a file to a folder in "User Files":
- The file inherits the folder's privacy settings
- Only accessible to users who can access the parent folder

### Example Folder Structure

```
User Files (public - everyone sees this root)
├── Battery Safety (private - only you see this)
│   ├── Document1.pdf (private - only you)
│   └── Subfolder (private - only you)
├── John's Folder (private - only John sees this)
└── Sarah's Folder (private - only Sarah sees this)
```

## Sharing Private Folders

To share a private folder with others:

1. Select the folder in the file manager
2. Click the **Share** button
3. Type `@username` to mention users
4. Choose permission level:
   - **View Only** - Can see files
   - **View & Download** - Can download files
   - **View, Download & Edit** - Can modify files
   - **Full Access** - Can delete files
5. Optionally set an expiration date
6. Click Share

## Permissions Hierarchy

### Access Levels
1. **Public** - Everyone can see (default for non-user contexts)
2. **Restricted** - Inherits parent folder permissions
3. **Private** - Only owner and explicitly shared users (default for user context)

### Permission Levels (for sharing)
1. **View** - Can see folder/file names
2. **Download** - Can download files
3. **Edit** - Can rename, upload new files
4. **Delete** - Can delete files/folders
5. **Manage** - Can share with others (folder-level only)

## Database Schema

### file_folders table
- `owner_id` - User who owns the folder
- `access_level` - `public`, `private`, or `restricted`
- `entity_type` - Context type (e.g., `user`, `accounting`, etc.)
- `created_by` - User who created the folder

### file_shares table
- `folder_id` or `file_id` - What's being shared
- `shared_with_user_id` - Specific user
- `shared_with_role_id` - Entire role (e.g., all managers)
- `permission` - Access level granted
- `expires_at` - Optional expiration date

## Code Changes

### FileManager.php

#### createFolder() method (line 235)
- Added automatic `owner_id` assignment for user context
- Added automatic `access_level = 'private'` for user context
- Checks parent folder to inherit user context

#### getFolderTree() method (line 17)
- Added filtering to hide private folders not owned by current user
- Admins can see all folders

#### getChildFolders() method (line 163)
- Added same privacy filtering as getFolderTree()

## Testing

### Test Private Folder Creation
1. Log in as User A
2. Navigate to User Files
3. Create folder "Test Private"
4. Log in as User B
5. Navigate to User Files
6. Verify "Test Private" is NOT visible

### Test Folder Sharing
1. Log in as User A
2. Select "Test Private" folder
3. Click Share, mention User B
4. Log in as User B
5. Verify "Test Private" is now visible

### Test Admin Access
1. Log in as admin
2. Navigate to User Files
3. Verify all private folders are visible (admin bypass)

## Current Status

✅ **Implemented:**
- Private folder creation in user context
- Ownership tracking
- Privacy filtering in folder tree
- Privacy filtering in folder browsing
- Sharing functionality (UI exists)

⚠️ **Future Enhancements:**
- Auto-create personal folder per user (e.g., `/User Files/{username}`)
- Bulk sharing with teams/departments
- Shared folder notifications
- Activity log for shared files

## Migration Notes

**Existing folders in User Files:**
- Previously created folders may still be public
- Run this SQL to make existing user folders private:

```sql
UPDATE file_folders 
SET owner_id = created_by, 
    access_level = 'private' 
WHERE entity_type = 'user' 
  AND parent_id IS NOT NULL 
  AND access_level = 'public';
```

## Support

For issues or questions about user file privacy, contact your system administrator.