UsersController.java

package edu.ucsb.cs156.example.controllers;

import com.fasterxml.jackson.core.JsonProcessingException;

import com.fasterxml.jackson.databind.ObjectMapper;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.http.ResponseEntity;

import org.springframework.security.access.prepost.PreAuthorize;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import edu.ucsb.cs156.example.entities.User;

import edu.ucsb.cs156.example.repositories.UserRepository;

import io.swagger.v3.oas.annotations.Operation;

import io.swagger.v3.oas.annotations.tags.Tag;

/**

 * This is a REST controller for getting information about the users.

 * 

 * These endpoints are only accessible to users with the role "ROLE_ADMIN".

 */

@Tag(name="User information (admin only)")

@RequestMapping("/api/admin/users")

@RestController

    @Autowired

    UserRepository userRepository;

    @Autowired

    ObjectMapper mapper;

    /**

     * This method returns a list of all users.  Accessible only to users with the role "ROLE_ADMIN".

     * @return a list of all users

     * @throws JsonProcessingException if there is an error processing the JSON

     */

    @Operation(summary= "Get a list of all users")

    @PreAuthorize("hasRole('ROLE_ADMIN')")

    @GetMapping("")

    public ResponseEntity<String> users()

            throws JsonProcessingException {

    }

}

Mutations