# Vendor RBAC System - Complete Guide

## Overview

The vendor dashboard implements a **Role-Based Access Control (RBAC)** system that distinguishes between **Owners** and **Team Members**, with granular permissions for team members.

---

## User Types

### 1. Vendor Owner

**Who:** The user who created the vendor account.

**Characteristics:**
- Has **ALL permissions** automatically (no role needed)
- Cannot be removed or have permissions restricted
- Can invite team members
- Can create and manage roles
- Identified by `VendorUser.user_type = "owner"`
- Linked via `Vendor.owner_user_id → User.id`

**Database:**
```python
# VendorUser record for owner
{
    "vendor_id": 1,
    "user_id": 5,
    "user_type": "owner",        # ✓ Owner
    "role_id": None,             # No role needed
    "is_active": True
}
```

**Permissions:**
- ✅ **All 75 permissions** (complete access)
- See full list below

---

### 2. Team Members

**Who:** Users invited by the vendor owner to help manage the vendor.

**Characteristics:**
- Have **limited permissions** based on assigned role
- Must be invited via email
- Invitation must be accepted before activation
- Can be assigned one of the pre-defined roles or custom role
- Identified by `VendorUser.user_type = "member"`
- Permissions come from `VendorUser.role_id → Role.permissions`

**Database:**
```python
# VendorUser record for team member
{
    "vendor_id": 1,
    "user_id": 7,
    "user_type": "member",       # ✓ Team member
    "role_id": 3,                # ✓ Role required
    "is_active": True,
    "invitation_token": None,    # Accepted
    "invitation_accepted_at": "2024-11-15 10:30:00"
}

# Role record
{
    "id": 3,
    "vendor_id": 1,
    "name": "Manager",
    "permissions": [
        "dashboard.view",
        "products.view",
        "products.create",
        "products.edit",
        "orders.view",
        ...
    ]
}
```

**Permissions:**
- 🔒 **Limited** based on assigned role
- Can have between 0 and 75 permissions
- Common roles: Manager, Staff, Support, Viewer, Marketing

---

## Permission System

### All Available Permissions (75 total)

```python
class VendorPermissions(str, Enum):
    # Dashboard (1)
    DASHBOARD_VIEW = "dashboard.view"

    # Products (6)
    PRODUCTS_VIEW = "products.view"
    PRODUCTS_CREATE = "products.create"
    PRODUCTS_EDIT = "products.edit"
    PRODUCTS_DELETE = "products.delete"
    PRODUCTS_IMPORT = "products.import"
    PRODUCTS_EXPORT = "products.export"

    # Stock/Inventory (3)
    STOCK_VIEW = "stock.view"
    STOCK_EDIT = "stock.edit"
    STOCK_TRANSFER = "stock.transfer"

    # Orders (4)
    ORDERS_VIEW = "orders.view"
    ORDERS_EDIT = "orders.edit"
    ORDERS_CANCEL = "orders.cancel"
    ORDERS_REFUND = "orders.refund"

    # Customers (4)
    CUSTOMERS_VIEW = "customers.view"
    CUSTOMERS_EDIT = "customers.edit"
    CUSTOMERS_DELETE = "customers.delete"
    CUSTOMERS_EXPORT = "customers.export"

    # Marketing (3)
    MARKETING_VIEW = "marketing.view"
    MARKETING_CREATE = "marketing.create"
    MARKETING_SEND = "marketing.send"

    # Reports (3)
    REPORTS_VIEW = "reports.view"
    REPORTS_FINANCIAL = "reports.financial"
    REPORTS_EXPORT = "reports.export"

    # Settings (4)
    SETTINGS_VIEW = "settings.view"
    SETTINGS_EDIT = "settings.edit"
    SETTINGS_THEME = "settings.theme"
    SETTINGS_DOMAINS = "settings.domains"

    # Team Management (4)
    TEAM_VIEW = "team.view"
    TEAM_INVITE = "team.invite"
    TEAM_EDIT = "team.edit"
    TEAM_REMOVE = "team.remove"

    # Marketplace Imports (3)
    IMPORTS_VIEW = "imports.view"
    IMPORTS_CREATE = "imports.create"
    IMPORTS_CANCEL = "imports.cancel"
```

---

## Pre-Defined Roles

### 1. Owner (All 75 permissions)
**Use case:** Vendor owner (automatically assigned)
- ✅ Full access to everything
- ✅ Cannot be restricted
- ✅ No role record needed (permissions checked differently)

---

### 2. Manager (43 permissions)
**Use case:** Senior staff who manage most operations

**Has access to:**
- ✅ Dashboard, Products (all), Stock (all)
- ✅ Orders (all), Customers (view, edit, export)
- ✅ Marketing (all), Reports (all including financial)
- ✅ Settings (view, theme)
- ✅ Imports (all)

**Does NOT have:**
- ❌ `customers.delete` - Cannot delete customers
- ❌ `settings.edit` - Cannot change core settings
- ❌ `settings.domains` - Cannot manage domains
- ❌ `team.*` - Cannot manage team members

---

### 3. Staff (10 permissions)
**Use case:** Daily operations staff

**Has access to:**
- ✅ Dashboard view
- ✅ Products (view, create, edit)
- ✅ Stock (view, edit)
- ✅ Orders (view, edit)
- ✅ Customers (view, edit)

**Does NOT have:**
- ❌ Delete anything
- ❌ Import/export
- ❌ Marketing
- ❌ Financial reports
- ❌ Settings
- ❌ Team management

---

### 4. Support (6 permissions)
**Use case:** Customer support team

**Has access to:**
- ✅ Dashboard view
- ✅ Products (view only)
- ✅ Orders (view, edit)
- ✅ Customers (view, edit)

**Does NOT have:**
- ❌ Create/delete products
- ❌ Stock management
- ❌ Marketing
- ❌ Reports
- ❌ Settings
- ❌ Team management

---

### 5. Viewer (6 permissions)
**Use case:** Read-only access for reporting/audit

**Has access to:**
- ✅ Dashboard (view)
- ✅ Products (view)
- ✅ Stock (view)
- ✅ Orders (view)
- ✅ Customers (view)
- ✅ Reports (view)

**Does NOT have:**
- ❌ Edit anything
- ❌ Create/delete anything
- ❌ Marketing
- ❌ Financial reports
- ❌ Settings
- ❌ Team management

---

### 6. Marketing (7 permissions)
**Use case:** Marketing team focused on campaigns

**Has access to:**
- ✅ Dashboard (view)
- ✅ Customers (view, export)
- ✅ Marketing (all)
- ✅ Reports (view)

**Does NOT have:**
- ❌ Products management
- ❌ Orders management
- ❌ Stock management
- ❌ Financial reports
- ❌ Settings
- ❌ Team management

---

## Permission Checking Logic

### How Permissions Are Checked

```python
# In User model (models/database/user.py)

def has_vendor_permission(self, vendor_id: int, permission: str) -> bool:
    """Check if user has a specific permission in a vendor."""

    # Step 1: Check if user is owner
    if self.is_owner_of(vendor_id):
        return True  # ✅ Owners have ALL permissions

    # Step 2: Check team member permissions
    for vm in self.vendor_memberships:
        if vm.vendor_id == vendor_id and vm.is_active:
            if vm.role and permission in vm.role.permissions:
                return True  # ✅ Permission found in role

    # No permission found
    return False
```

### Permission Checking Flow

```
Request → Middleware → Extract vendor from URL
                    ↓
              Check user authentication
                    ↓
              Check if user is owner
                    ├── YES → ✅ Allow (all permissions)
                    └── NO ↓
              Check if user is team member
                    ├── NO → ❌ Deny
                    └── YES ↓
              Check if membership is active
                    ├── NO → ❌ Deny
                    └── YES ↓
              Check if role has required permission
                    ├── NO → ❌ Deny (403 Forbidden)
                    └── YES → ✅ Allow
```

---

## Using Permissions in Code

### 1. Require Specific Permission

**When to use:** Endpoint needs one specific permission

```python
from fastapi import APIRouter, Depends
from app.api.deps import require_vendor_permission
from app.core.permissions import VendorPermissions
from models.database.user import User

router = APIRouter()

@router.post("/products")
def create_product(
    product_data: ProductCreate,
    user: User = Depends(
        require_vendor_permission(VendorPermissions.PRODUCTS_CREATE.value)
    )
):
    """
    Create a product.

    Required permission: products.create
    ✅ Owner: Always allowed
    ✅ Manager: Allowed (has products.create)
    ✅ Staff: Allowed (has products.create)
    ❌ Support: Denied (no products.create)
    ❌ Viewer: Denied (no products.create)
    ❌ Marketing: Denied (no products.create)
    """
    # Create product...
    pass
```

---

### 2. Require ANY Permission

**When to use:** Endpoint can be accessed with any of several permissions

```python
@router.get("/dashboard")
def view_dashboard(
    user: User = Depends(
        require_any_vendor_permission(
            VendorPermissions.DASHBOARD_VIEW.value,
            VendorPermissions.REPORTS_VIEW.value
        )
    )
):
    """
    View dashboard.

    Required: dashboard.view OR reports.view
    ✅ Owner: Always allowed
    ✅ Manager: Allowed (has both)
    ✅ Staff: Allowed (has dashboard.view)
    ✅ Support: Allowed (has dashboard.view)
    ✅ Viewer: Allowed (has both)
    ✅ Marketing: Allowed (has both)
    """
    # Show dashboard...
    pass
```

---

### 3. Require ALL Permissions

**When to use:** Endpoint needs multiple permissions

```python
@router.post("/products/bulk-delete")
def bulk_delete_products(
    user: User = Depends(
        require_all_vendor_permissions(
            VendorPermissions.PRODUCTS_VIEW.value,
            VendorPermissions.PRODUCTS_DELETE.value
        )
    )
):
    """
    Bulk delete products.

    Required: products.view AND products.delete
    ✅ Owner: Always allowed
    ✅ Manager: Allowed (has both)
    ❌ Staff: Denied (no products.delete)
    ❌ Support: Denied (no products.delete)
    ❌ Viewer: Denied (no products.delete)
    ❌ Marketing: Denied (no products.delete)
    """
    # Delete products...
    pass
```

---

### 4. Require Owner Only

**When to use:** Endpoint is owner-only (team management, critical settings)

```python
from app.api.deps import require_vendor_owner

@router.post("/team/invite")
def invite_team_member(
    email: str,
    role_id: int,
    user: User = Depends(require_vendor_owner)
):
    """
    Invite a team member.

    Required: Must be vendor owner
    ✅ Owner: Allowed
    ❌ Manager: Denied (not owner)
    ❌ All team members: Denied (not owner)
    """
    # Invite team member...
    pass
```

---

### 5. Get User Permissions

**When to use:** Need to check permissions in business logic

```python
from app.api.deps import get_user_permissions

@router.get("/my-permissions")
def list_my_permissions(
    permissions: list = Depends(get_user_permissions)
):
    """
    Get all permissions for current user.

    Returns:
    - Owner: All 75 permissions
    - Team Member: Permissions from their role
    """
    return {"permissions": permissions}
```

---

## Database Schema

### VendorUser Table

```sql
CREATE TABLE vendor_users (
    id SERIAL PRIMARY KEY,
    vendor_id INTEGER NOT NULL REFERENCES vendors(id),
    user_id INTEGER NOT NULL REFERENCES users(id),
    user_type VARCHAR NOT NULL,           -- 'owner' or 'member'
    role_id INTEGER REFERENCES roles(id), -- NULL for owners
    invited_by INTEGER REFERENCES users(id),
    invitation_token VARCHAR,
    invitation_sent_at TIMESTAMP,
    invitation_accepted_at TIMESTAMP,
    is_active BOOLEAN DEFAULT FALSE,
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);
```

### Role Table

```sql
CREATE TABLE roles (
    id SERIAL PRIMARY KEY,
    vendor_id INTEGER NOT NULL REFERENCES vendors(id),
    name VARCHAR(100) NOT NULL,
    permissions JSON DEFAULT '[]',       -- Array of permission strings
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);
```

---

## Team Member Lifecycle

### 1. Invitation

```
Owner invites user → VendorUser created:
{
    "user_type": "member",
    "is_active": False,
    "invitation_token": "abc123...",
    "invitation_sent_at": "2024-11-29 10:00:00",
    "invitation_accepted_at": null
}
```

### 2. Acceptance

```
User accepts invitation → VendorUser updated:
{
    "is_active": True,
    "invitation_token": null,
    "invitation_accepted_at": "2024-11-29 10:30:00"
}
```

### 3. Active Member

```
Member can now access vendor dashboard with role permissions
```

### 4. Deactivation

```
Owner deactivates member → VendorUser updated:
{
    "is_active": False
}
```

---

## Common Use Cases

### Use Case 1: Dashboard Access

**Q:** Can all users access the dashboard?

**A:** Yes, if they have `dashboard.view` permission.

- ✅ Owner: Always
- ✅ Manager, Staff, Support, Viewer, Marketing: All have it
- ❌ Custom role without `dashboard.view`: No

---

### Use Case 2: Product Management

**Q:** Who can create products?

**A:** Users with `products.create` permission.

- ✅ Owner: Always
- ✅ Manager: Yes (has permission)
- ✅ Staff: Yes (has permission)
- ❌ Support, Viewer, Marketing: No

---

### Use Case 3: Financial Reports

**Q:** Who can view financial reports?

**A:** Users with `reports.financial` permission.

- ✅ Owner: Always
- ✅ Manager: Yes (has permission)
- ❌ Staff, Support, Viewer, Marketing: No

---

### Use Case 4: Team Management

**Q:** Who can invite team members?

**A:** Only the vendor owner.

- ✅ Owner: Yes (owner-only operation)
- ❌ All team members (including Manager): No

---

### Use Case 5: Settings Changes

**Q:** Who can change vendor settings?

**A:** Users with `settings.edit` permission.

- ✅ Owner: Always
- ❌ Manager: No (doesn't have permission)
- ❌ All other roles: No

---

## Error Responses

### Missing Permission

```http
HTTP 403 Forbidden

{
    "error_code": "INSUFFICIENT_VENDOR_PERMISSIONS",
    "message": "You don't have permission to perform this action",
    "details": {
        "required_permission": "products.delete",
        "vendor_code": "wizamart"
    }
}
```

### Not Owner

```http
HTTP 403 Forbidden

{
    "error_code": "VENDOR_OWNER_ONLY",
    "message": "This operation requires vendor owner privileges",
    "details": {
        "operation": "team management",
        "vendor_code": "wizamart"
    }
}
```

### Inactive Membership

```http
HTTP 403 Forbidden

{
    "error_code": "INACTIVE_VENDOR_MEMBERSHIP",
    "message": "Your vendor membership is inactive"
}
```

---

## Summary

### Owner vs Team Member

| Feature | Owner | Team Member |
|---------|-------|-------------|
| **Permissions** | All 75 (automatic) | Based on role (0-75) |
| **Role Required** | No | Yes |
| **Can Be Removed** | No | Yes |
| **Team Management** | ✅ Yes | ❌ No |
| **Critical Settings** | ✅ Yes | ❌ No (usually) |
| **Invitation Required** | No (creates vendor) | Yes |

### Permission Hierarchy

```
Owner (75 permissions)
  └─ Manager (43 permissions)
      └─ Staff (10 permissions)
          └─ Support (6 permissions)
              └─ Viewer (6 permissions, read-only)

Marketing (7 permissions, specialized)
```

### Best Practices

1. **Use Constants:** Always use `VendorPermissions.PERMISSION_NAME.value`
2. **Least Privilege:** Give team members minimum permissions needed
3. **Owner Only:** Keep sensitive operations owner-only
4. **Custom Roles:** Create custom roles for specific needs
5. **Regular Audit:** Review team member permissions regularly

---

This RBAC system provides flexible, secure access control for vendor dashboards with clear separation between owners and team members.
