PostController.java

package com.booleanuk.api.controller;

import com.booleanuk.api.model.Post;
import com.booleanuk.api.repository.PostRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.server.ResponseStatusException;

import java.util.List;

@RestController
@RequestMapping("posts")
public class PostController {

    @Autowired
    private PostRepository postRepository;

    @PostMapping
    public ResponseEntity<Post> createPost(@RequestBody Post post) {
        if (post == null) {
            throw new ResponseStatusException(HttpStatus.BAD_REQUEST);
        }
        return new ResponseEntity<>(this.postRepository.save(post), HttpStatus.CREATED);
    }

    @GetMapping
    public List<Post> getAllPosts() {
        return this.postRepository.findAll();
    }

    @GetMapping("/{id}")
    public ResponseEntity<Post> getPost(@PathVariable int id) {
        return new ResponseEntity<>(this.postRepository.findById(id).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND,"No post with that id were found")), HttpStatus.OK);
    }

    @PutMapping("/{id}")
    public ResponseEntity<Post> updatePost(@PathVariable int id, @RequestBody Post post) {
        if (post == null) {
            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Could not update the post, please check all required fields are correct");
        }
        Post updatePost = this.postRepository.findById(id).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND,"No post with that id were found "));
        updatePost.setTitle(post.getTitle());
        updatePost.setDescription(post.getDescription());

        return new ResponseEntity<>(this.postRepository.save(updatePost), HttpStatus.CREATED);
    }

    @DeleteMapping("/{id}")
    public ResponseEntity<Post> deletePost(@PathVariable int id) {
        Post deletedPost = this.postRepository.findById(id).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "No post with that id were found"));
        this.postRepository.delete(deletedPost);
        return ResponseEntity.ok(deletedPost);
    }
}