ArticlesController.java

package edu.ucsb.cs156.example.controllers;

import edu.ucsb.cs156.example.entities.Articles;
import edu.ucsb.cs156.example.errors.EntityNotFoundException;
import edu.ucsb.cs156.example.repositories.ArticlesRepository;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import lombok.extern.slf4j.Slf4j;

import com.fasterxml.jackson.core.JsonProcessingException;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
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 jakarta.validation.Valid;

import java.time.LocalDateTime;

/**
 * This is a REST controller for Articles
 */

@Tag(name = "Articles")
@RequestMapping("/api/articles")
@RestController
@Slf4j
public class ArticlesController extends ApiController {

  @Autowired
  ArticlesRepository articlesRepository;

  /**
   * List all Articles
   * 
   * @return an iterable of Articles
   */
  @Operation(summary = "List all articles")
  @PreAuthorize("hasRole('ROLE_USER')")
  @GetMapping("/all")
  public Iterable<Articles> allArticles() {
    Iterable<Articles> articles = articlesRepository.findAll();
    return articles;
  }

  /**
   * Get a single Article by id
   * 
   * @param id the id of the article
   * @return an Article
   */
  @Operation(summary = "Get a single Article")
  @PreAuthorize("hasRole('ROLE_USER')")
  @GetMapping("")
  public Articles getById(
      @Parameter(name = "id") @RequestParam Long id) {
    Articles article = articlesRepository.findById(id)
        .orElseThrow(() -> new EntityNotFoundException(Articles.class, id));

    return article;
  }

  /**
   * Create a new article
   * 
   * @param title       the title of the article
   * @param url         the url of the article
   * @param explanation the explanation of the article
   * @param email       the email of the author
   * @param dateAdded   the date the article was added
   * 
   * @return the created article
   * 
   */
  @Operation(summary = "Create a new article")
  @PreAuthorize("hasRole('ROLE_ADMIN')")
  @PostMapping("/post")
  public Articles postArticle(
      @Parameter(name = "title") @RequestParam String title,
      @Parameter(name = "url") @RequestParam String url,
      @Parameter(name = "explanation") @RequestParam String explanation,
      @Parameter(name = "email") @RequestParam String email,
      @Parameter(name = "dateAdded", description = "date (in iso format, e.g. YYYY-mm-ddTHH:MM:SS; see https://en.wikipedia.org/wiki/ISO_8601)") @RequestParam("dateAdded") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime dateAdded)
      throws JsonProcessingException {

    // For an explanation of @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
    // See: https://www.baeldung.com/spring-date-parameters

    log.info("dateAdded={}", dateAdded);

    Articles article = new Articles();
    article.setTitle(title);
    article.setUrl(url);
    article.setExplanation(explanation);
    article.setEmail(email);
    article.setDateAdded(dateAdded);

    Articles savedArticle = articlesRepository.save(article);

    return savedArticle;
  }

  /**
   * Update a single article
   * 
   * @param id       id of the article to update
   * @param incoming the new article
   * @return the updated article object
   */
  @Operation(summary = "Update a single article")
  @PreAuthorize("hasRole('ROLE_ADMIN')")
  @PutMapping("")
  public Articles updateArticle(
      @Parameter(name = "id") @RequestParam Long id,
      @RequestBody @Valid Articles incoming) {

    Articles article = articlesRepository.findById(id)
        .orElseThrow(() -> new EntityNotFoundException(Articles.class, id));

    article.setTitle(incoming.getTitle());
    article.setUrl(incoming.getUrl());
    article.setExplanation(incoming.getExplanation());
    article.setEmail(incoming.getEmail());
    article.setDateAdded(incoming.getDateAdded());

    articlesRepository.save(article);

    return article;
  }

  /**
   * Delete a Article
   * 
   * @param id the id of the article to delete
   * @return a message indicating the article was deleted
   */
  @Operation(summary = "Delete a Article")
  @PreAuthorize("hasRole('ROLE_ADMIN')")
  @DeleteMapping("")
  public Object deleteArticle(
      @Parameter(name = "id") @RequestParam Long id) {
    Articles ucsbDate = articlesRepository.findById(id)
        .orElseThrow(() -> new EntityNotFoundException(Articles.class, id));

    articlesRepository.delete(ucsbDate);
    return genericMessage("Article with id %s deleted".formatted(id));
  }
}