src/main/java/com/pt/controller/CommentController.java

package com.pt.controller;

import com.pt.constant.Constants;
import com.pt.service.CommentService;
import com.pt.utils.JWTUtils;
import com.pt.entity.Comment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/comment")
@CrossOrigin(origins = "*")
public class CommentController {

    @Autowired
    private CommentService commentService;

    @PostMapping("/add")
    public ResponseEntity<?> addComment(
            @RequestHeader("token") String token,
            @RequestParam("content") String content,
            @RequestParam("username") String username,
            @RequestParam("postId") int postId
    ) {
        Map<String, Object> ans = new HashMap<>();

        if (!JWTUtils.checkToken(token, username, Constants.UserRole.USER)) {
            ans.put("result", "Invalid token");
            return ResponseEntity.badRequest().body(ans);
        }

        commentService.addComment(content, username, postId);
        ans.put("result", "Comment added successfully");
        return ResponseEntity.ok(ans);
    }

    @DeleteMapping("/delete")
    public ResponseEntity<?> deleteComment(
            @RequestHeader("token") String token,
            @RequestParam("commentId") int commentId,
            @RequestParam("username") String username
    ) {
        Map<String, Object> ans = new HashMap<>();

        if (!JWTUtils.checkToken(token, username, Constants.UserRole.ADMIN)) {
            ans.put("result", "Invalid token");
            return ResponseEntity.badRequest().body(ans);
        }

        commentService.deleteComment(commentId);
        ans.put("result", "Comment deleted successfully");
        return ResponseEntity.ok(ans);
    }

    @GetMapping("/get")
    public ResponseEntity<?> getComments(
            @RequestHeader("token") String token,
            @RequestParam("postId") int postId,
            @RequestParam("username") String username
    ) {
        Map<String, Object> ans = new HashMap<>();

        if(!JWTUtils.checkToken(token, username, Constants.UserRole.USER)) {
            ans.put("result", "Invalid token");
            return ResponseEntity.badRequest().body(ans);
        }

        List<Comment> comments = commentService.getCommentsByPostId(postId);
        ans.put("result", "Comments retrieved successfully");
        ans.put("data", Map.of(
           "comments", comments
        ));
        return ResponseEntity.ok(ans);
    }
}