SE_backend

Backend API service for Cafe Management System built using GraphQL API, Apollo and Node.js libraries. MongoDB used and hosted on MongoDB Atlas.

API Documentation

Queries

1. allItems

   • Fetch all items in the menu.
   • Returns: [Item]

2. userOrders

   • Fetch orders for the logged-in user.
   • Returns: [Order]

3. findOrder

   • Find an order by its ID.
   • Input: orderId: ID!
   • Returns: Order

4. getEmployees

   • Get a list of employees.
   • Returns: [User]

5. getMonthlySales

   • Get monthly sales statistics.
   • Input: selectedMonth: Int, selectedYear: Int
   • Returns: MonthlySales

Mutations

1. signup

   • User signup.
   • Input: signupInput: signupInput
   • Returns: User

2. login

   • User login.
   • Input: loginInput: loginInput
   • Returns: User

3. registerEmployee

   • Register an employee (admin only).
   • Input: signupInput: signupInput
   • Returns: User

4. addItem

   • Add a new item to the menu (admin only).
   • Input: itemInput: itemInput
   • Returns: Item

5. placeOrder

   • Place a new order.
   • Input: orderInput: orderInput
   • Returns: Order

6. changeOrderStatus

   • Change the status of an order (admin/employee only).
   • Input: orderId: ID!, newStatus: String!
   • Returns: Order

7. deleteItem

   • Delete an item from the menu (admin only).
   • Input: itemId: ID!
   • Returns: { message: String }

8. deleteEmployee

   • Delete an employee (admin only).
   • Input: userId: ID!
   • Returns: { message: String }

9. forgotPassword

   • Initiate password reset process.
   • Input: email: String!
   • Returns: ForgotPasswordResponse

10. changePassword

    • Change user password.
    • Input: currentPassword: String, newPassword: String
    • Returns: ChangePasswordResponse

Types

1. DateTime

   • Custom scalar representing a date and time.

2. OrderStatus

   • Enum representing order status (Pending, Preparing, Prepared, Served, Completed, Cancelled).

3. User

   • User information.
   • Fields: id, username, email, password, token, role.

4. signupInput

   • Input for user signup.
   • Fields: username, email, password.

5. loginInput

   • Input for user login.
   • Fields: email, password.

6. Item

   • Menu item information.
   • Fields: id, itemName, itemDesc, itemImage, itemGrp, itemPrice.

7. itemInput

   • Input for adding a new item.
   • Fields: itemName, itemDesc, itemImage, itemGrp, itemPrice.

8. Order

   • Order information.
   • Fields: id, customerName, items, totalAmount, status, createdAt, orderServedAt, orderCompletedAt.

9. OrderItem

   • Information about an item in an order.
   • Fields: name, quantity, price.

10. orderInput

    • Input for placing a new order.
    • Fields: customerName, items, totalAmount.

11. orderItemInput

    • Input for an item in an order.
    • Fields: name, quantity, price.

12. MonthlySales

    • Monthly sales statistics.
    • Fields: totalSales, avgOrderCompletionTime, numberOfOrdersMonthly, month, year, topSellingItems, avgOrderValue, bestSellingCategory, busyTime.

13. TopSellingItem

    • Information about a top-selling item.
    • Fields: itemName, totalQuantity.

14. ForgotPasswordResponse

    • Response for the forgot password mutation.
    • Fields: success, message.

15. ChangePasswordResponse

    • Response for the change password mutation.
    • Fields: success, message.

Notes

• The API uses JWT tokens for authentication.
• Certain mutations are restricted to specific roles (admin, employee).
• Some mutations require authentication (login/signup) and authorization (admin-only actions).
• The API supports fetching monthly sales data and managing user orders.
• Error responses include custom error codes for better error handling.
• Date and time are represented using the custom DateTime scalar.