UserRestController.java

package com.mif13.authServer.controllers;

import com.mif13.authServer.dao.UsersDao;
import com.mif13.authServer.model.User;
import com.mif13.authServer.model.User.UserCreationException;
import java.util.Optional;
import java.util.regex.PatternSyntaxException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.media.Content;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.responses.ApiResponses;


@RestController
@RequestMapping(value = "users")
public class UserRestController {

    private final UsersDao usersRepo;

    @Autowired
    public UserRestController(UsersDao usersRepo) {
        this.usersRepo = usersRepo;
    }

    @Operation(summary = "Get user informations by id")
    @ApiResponses(value = {
        @ApiResponse(responseCode = "200 OK", description = "Found the user",
            content = {@Content(mediaType = "application/json",
                schema = @Schema(implementation = User.class))}),
        @ApiResponse(responseCode = "", description = "User Not Found",
            content = @Content)
    })
    @GetMapping(value = "/{id}", produces = {MediaType.APPLICATION_JSON_VALUE,
        MediaType.APPLICATION_XML_VALUE})
    public ResponseEntity<User> getUserAsJsonOrXml(@PathVariable String id) {
        ResponseEntity<User> response;

        Optional<User> optionalUser = usersRepo.get(id);
        if (optionalUser.isPresent()) {
            User user = optionalUser.get();
            response = new ResponseEntity<>(user, HttpStatus.OK);
        } else {
            response = new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }

        return response;
    }

    @GetMapping(value = "/{id}", produces = MediaType.TEXT_HTML_VALUE)
    public ModelAndView getUserAsHtml(@PathVariable String id, Model model) {
        // "user" nom du template HTML (sans extension)
        ModelAndView modelAndView = new ModelAndView("user");

        Optional<User> optionalUser = usersRepo.get(id);
        if (optionalUser.isPresent()) {
            User user = optionalUser.get();

            // on initialise les variables du template
            model.addAttribute("user", user);

            modelAndView.setStatus(HttpStatus.OK);
        } else {
            model.addAttribute("id", id);

            modelAndView.setStatus(HttpStatus.NOT_FOUND);
        }

        return modelAndView;
    }

    /**
     * Cree un User a partir des parametres URL Encoded.
     * Renvoie 400 BAD_REQUEST si le login ou le password sont invalides
     *
     * @param login    Login
     * @param password Password
     * @return contenu vide
     */
    @PostMapping(consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public ResponseEntity<Void> createUserFromUrlEncoded(@RequestParam("login") String login,
        @RequestParam("password") String password) {
        ResponseEntity<Void> response;

        try {
            User user = new User(login, password);
            response = createUser(user);
        } catch (UserCreationException e) {
            e.printStackTrace();
            response = new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }

        return response;
    }

    /**
     * Cree un User a partir d'un JSON.
     *
     * /!\ Attention /!\
     * Renvoie 400 BAD_REQUEST si le login ou le password sont invalides
     * (et produit une HttpMessageNotReadableException)
     *
     * @param user JSON converti en User (converter de Spring)
     * @return contenu vide
     */
    @PostMapping(consumes = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Void> createUserFromJson(@RequestBody User user) {
        return createUser(user);
    }

    private ResponseEntity<Void> createUser(User user) {
        ResponseEntity<Void> response;

        try {
            Optional<User> optionalUser = usersRepo.get(user.getLogin());
            if (optionalUser.isEmpty()) {
                usersRepo.save(user);
                response = new ResponseEntity<>(HttpStatus.CREATED);
            } else {
                response = new ResponseEntity<>(HttpStatus.FORBIDDEN);
            }
        } catch (PatternSyntaxException e) {
            e.printStackTrace();
            response = new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }

        return response;
    }

    @Operation(summary = "Modify password of a user by its id")
    @PutMapping("/{id}")
    public ResponseEntity<Void> modifyUserPassword(@PathVariable String id,
        @RequestParam("new_password") String new_password) {

        ResponseEntity<Void> response;

        Optional<User> optionalUser = usersRepo.get(id);
        try {
            if (optionalUser.isPresent()) {
                User user = optionalUser.get();

                user.setPassword(new_password);
                response = new ResponseEntity<>(HttpStatus.NO_CONTENT);

            } else {
                response = new ResponseEntity<>(HttpStatus.NOT_FOUND);
            }

        } catch (Exception e) {
            e.printStackTrace();
            response = new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }

        return response;
    }

    @Operation(summary = "Delet a user on the database, by its id")
    @DeleteMapping("/{id}")
    public ResponseEntity<Void> deleteUser(@PathVariable String id) {

        ResponseEntity<Void> response;

        Optional<User> optionalUser = usersRepo.get(id);
        try {
            if (optionalUser.isPresent()) {
                User user = optionalUser.get();
                usersRepo.delete(user);
                response = new ResponseEntity<>(HttpStatus.NO_CONTENT);

            } else {
                response = new ResponseEntity<>(HttpStatus.NOT_FOUND);
            }

        } catch (Exception e) {
            e.printStackTrace();
            response = new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }

        return response;
    }

}