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

        return articles;
    }

    /**
     * Create a new articles entry
     * 
     * @param title         title of the article
     * @param url           url to the article
     * @param explanation   explanation of the article
     * @param email         article author's email
     * @param dateAdded     date article was added
     * @return the saved article
     */
    @Operation(summary= "Create a new articles entry")
    @PreAuthorize("hasRole('ROLE_ADMIN')")
    @PostMapping("/post")
    public Articles postArticles(
            @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 articles = new Articles();
        articles.setTitle(title);
        articles.setUrl(url);
        articles.setExplanation(explanation);
        articles.setEmail(email);
        articles.setDateAdded(dateAdded);

        Articles savedArticles = articlesRepository.save(articles);

        return savedArticles;
    }

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

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

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

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

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

        articlesRepository.save(articles);

        return articles;
    }
}