blog-dev-008-post-reply-feature - add post comment feature

springBootBlog/sql/comment.sql

@@ -0,0 +1,8 @@
+-- DDL for comment table
+
+INSERT INTO comment(`author_id`,`post_id`,`comment_content`, `create_time`, `update_time`)
+values
+(1, 1,  "some comment", now(), now()),
+(2, 2,  "some comment", now(), now()),
+(3, 3,  "some comment", now(), now()),
+(2, 1,  "ahahahahahahaah", now(), now());

springBootBlog/src/main/java/com/yen/mdblog/controller/CommentController.java

@@ -0,0 +1,55 @@
+package com.yen.mdblog.controller;
+
+import com.yen.mdblog.entity.Po.Author;
+import com.yen.mdblog.entity.Po.Comment;
+import com.yen.mdblog.entity.Po.Post;
+import com.yen.mdblog.entity.Vo.CreateComment;
+import com.yen.mdblog.entity.Vo.CreatePost;
+import com.yen.mdblog.service.CommentService;
+import com.yen.mdblog.util.PostUtil;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+import java.security.Principal;
+import java.time.LocalDateTime;
+import java.util.Date;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Controller
+@RequestMapping("/comment")
+@Log4j2
+public class CommentController {
+
+    @Autowired
+    CommentService commentService;
+
+//    @GetMapping("/{postId}")
+//    public String getComments(){
+//
+//    }
+
+    @RequestMapping(value="/create", method= RequestMethod.POST)
+    public String createComment(CreateComment request, Model model, Principal principal){
+
+        log.info(">>> create comment start ...");
+        Comment comment = new Comment();
+//        comment.setAuthorId(request.getAuthorId());
+        comment.setPostId(request.getPostId());
+        comment.setCommentContent(request.getCommentContent());
+        comment.setCreateTime(new Date()); //?
+
+        System.out.println(">>> (CommentController) create new comment = " + comment.toString());
+        log.info(">>>> create post end ...");
+        commentService.insertComment(comment);
+        model.addAttribute("user", principal.getName());
+        return "comment_success";
+    }
+
+}

springBootBlog/src/main/java/com/yen/mdblog/controller/PostController.java

@@ -4,11 +4,14 @@
 import com.github.pagehelper.PageInfo;
 import com.yen.mdblog.entity.Dto.SearchRequest;
 import com.yen.mdblog.entity.Po.Author;
+import com.yen.mdblog.entity.Po.Comment;
 import com.yen.mdblog.entity.Po.Post;
+import com.yen.mdblog.entity.Vo.CreateComment;
 import com.yen.mdblog.entity.Vo.CreatePost;
 import com.yen.mdblog.mapper.PostMapper;
 import com.yen.mdblog.repository.PostRepository;
 import com.yen.mdblog.service.AuthorService;
+import com.yen.mdblog.service.CommentService;
 import com.yen.mdblog.service.PostService;
 import com.yen.mdblog.util.PostUtil;
 import lombok.extern.log4j.Log4j2;
@@ -51,6 +54,9 @@ public class PostController {
 	@Autowired
 	PostMapper postMapper;
 
+	@Autowired
+	CommentService commentService;
+
 	@GetMapping("/all")
 	public String getPaginatedPosts(
 			@RequestParam(value = "pageNum", defaultValue = "0") int pageNum,
@@ -102,7 +108,19 @@ public String getPostById(@PathVariable long id, Model model, Principal principa
 
 		Optional<Post> postOptional = postRepository.findById(id);
 		if (postOptional.isPresent()) {
+
 			model.addAttribute("post", postOptional.get());
+			model.addAttribute("comment", new CreateComment());
+
+			// load comment
+			// TODO : double check whether should do below here or in CommentController
+			List<Comment> commentList = commentService.getCommentsByPostId(id);
+			System.out.println(">>> comment len  = " + commentList.size());
+			// only add to model when comment size > 0
+			if (commentList.size() > 0){
+				model.addAttribute("comments", commentList);
+			}
+
 		} else {
 			model.addAttribute("error", "no-post");
 		}

springBootBlog/src/main/java/com/yen/mdblog/entity/Po/Author.java

@@ -3,7 +3,6 @@
 import lombok.Data;
 import lombok.ToString;
 import javax.persistence.*;
-import java.time.LocalDateTime;
 import java.util.*;
 
 @Data

springBootBlog/src/main/java/com/yen/mdblog/entity/Po/Comment.java

@@ -0,0 +1,37 @@
+package com.yen.mdblog.entity.Po;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+import javax.persistence.*;
+import java.util.*;
+
+@Data
+@Entity
+@ToString
+@AllArgsConstructor
+@NoArgsConstructor
+@Table(name = "comment")
+public class Comment {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column
+    private Integer id;
+
+    @Column
+    private Integer authorId;
+
+    @Column
+    private Long postId;
+
+    @Column(columnDefinition = "TEXT")
+    private String commentContent;
+
+    @Column
+    private Date createTime;
+
+    @Column
+    private Date updateTime;
+}

springBootBlog/src/main/java/com/yen/mdblog/entity/Vo/CreateComment.java

@@ -0,0 +1,19 @@
+package com.yen.mdblog.entity.Vo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import java.time.LocalDateTime;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class CreateComment {
+
+    private long id;
+    private Integer authorId;
+    private Long postId;
+    private String commentContent;
+    private LocalDateTime createTime;
+    private LocalDateTime updateTime;
+}

springBootBlog/src/main/java/com/yen/mdblog/mapper/AuthorMapper.java

@@ -16,8 +16,6 @@ public interface AuthorMapper {
 
     public int getAuthorCount();
 
-//    @Insert("INSERT INTO authors(`id`,`email`,`name`,`url`) values(#{id}, #{email},  #{name}, #{url})")
-//    @Options(useGeneratedKeys = true, keyProperty = "id")
     public void insertAuthor(Author author);
 
     public void updateAuthor(Author author);

springBootBlog/src/main/java/com/yen/mdblog/mapper/CommentMapper.java

@@ -0,0 +1,17 @@
+package com.yen.mdblog.mapper;
+
+import com.yen.mdblog.entity.Po.Author;
+import com.yen.mdblog.entity.Po.Comment;
+import com.yen.mdblog.entity.Po.Post;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.List;
+
+@Mapper
+public interface CommentMapper {
+
+    public List<Comment> getCommentByPostId(Long postId);
+
+    public void insertComment(Comment comment);
+}

springBootBlog/src/main/java/com/yen/mdblog/mapper/CommentMapper.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!-- https://dotblogs.com.tw/zjh/2018/09/28/mybatis_1 -->
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.yen.mdblog.mapper.CommentMapper">
+
+    <!-- public List<Comment> getCommentByPostId(Long postId); -->
+    <select id="getCommentByPostId" resultType="com.yen.mdblog.entity.Po.Comment" parameterType="long">
+        SELECT * FROM comment where post_id = #{postId}
+    </select>
+
+    <!-- public void insertComment(Comment comment); -->
+<!--    <insert id="insertComment">-->
+<!--        INSERT INTO comment(`author_id`,`post_id`,`comment_content`, `create_time`, `update_time`)-->
+<!--        values(#{authorId}, #{postId},  #{commentContent}, #{createTime}, #{updateTime})-->
+<!--    </insert>-->
+    <insert id="insertComment">
+        INSERT INTO comment(`post_id`, `comment_content`)
+        values(#{postId}, #{commentContent})
+    </insert>
+
+</mapper>

springBootBlog/src/main/java/com/yen/mdblog/service/AuthorService.java

@@ -1,7 +1,6 @@
 package com.yen.mdblog.service;
 
 import com.yen.mdblog.entity.Po.Author;
-import com.yen.mdblog.entity.Po.Post;
 
 import java.util.List;
 

springBootBlog/src/main/java/com/yen/mdblog/service/CommentService.java

@@ -0,0 +1,12 @@
+package com.yen.mdblog.service;
+
+import com.yen.mdblog.entity.Po.Comment;
+
+import java.util.List;
+
+public interface CommentService {
+
+    List<Comment> getCommentsByPostId(Long postId);
+
+    void insertComment(Comment comment);
+}

springBootBlog/src/main/java/com/yen/mdblog/service/impl/CommentServiceImpl.java

@@ -0,0 +1,27 @@
+package com.yen.mdblog.service.impl;
+
+import com.yen.mdblog.entity.Po.Comment;
+import com.yen.mdblog.mapper.CommentMapper;
+import com.yen.mdblog.service.CommentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class CommentServiceImpl implements CommentService {
+
+    @Autowired
+    CommentMapper commentMapper;
+
+    @Override
+    public List<Comment> getCommentsByPostId(Long postId) {
+        return commentMapper.getCommentByPostId(postId);
+    }
+
+    @Override
+    public void insertComment(Comment comment) {
+        commentMapper.insertComment(comment);
+    }
+
+}

springBootBlog/src/main/resources/templates/comment_success.html

@@ -0,0 +1,16 @@
+<!doctype html>
+<html lang="en" xmlns:th="https://www.thymeleaf.org">
+
+<head>
+<!--    <meta charset="UTF-8">-->
+    <meta charset="UTF-8" name=”viewport” content=”width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=2.0, user-scalable=yes” />
+    <title>Add new comment complete</title>
+</head>
+<body>
+<div th:insert="header"></div>
+
+<h2>Comment OK</h2>
+
+</div>
+</body>
+</html>

springBootBlog/src/main/resources/templates/post.html

@@ -19,5 +19,30 @@ <h1 th:utext="${post.title}">Title</h1>
 		<p th:utext="${post.content}">Content</p>
 	</article>
 </div>
+
+<!-- create comment -->
+<body>
+<!--<form action="#" th:action="@{/posts/create}" th:object="${CreatePost}" method="post" align="left">-->
+<form action="#" th:action="@{/comment/create}"  th:object="${comment}" method="post" align="left">
+	<p>Content: <textarea name="commentContent" rows="3" cols="50" th:field="*{commentContent}">your content</textarea></p>
+
+	<input type="text" name="postId" th:value="*{postId}" placeholder="post id">
+
+	<p><input type="submit" value="Submit" /> <input type="reset" value="Reset" /></p>
+</form>
+</body>
+
+<!-- view comment -->
+<h3>Comment</h3>
+<div th:if="${not #lists.isEmpty(comments)}" th:each="comment : ${comments}" class="card">
+	<div class="card-body">
+		<!-- <p th:text="'id: ' + ${greeting.id}" />-->
+		<p class="card-text" th:text="'ID: ' + ${comment.id}">Id</p>
+		<p class="card-text" th:text="'Author: ' + ${comment.authorId}">commenter Id</p>
+		<p class="card-text" th:text="'Content: ' + ${comment.commentContent}">content</p>
+		<p class="card-text" th:text="'Time: ' + ${comment.createTime}">comment time</p>
+	</div>
+</div>
+
 </body>
 </html>