complete list latest comments service

src/main/java/cc/ryanc/halo/model/dto/CommentOutputDTO.java

@@ -0,0 +1,41 @@
+package cc.ryanc.halo.model.dto;
+
+import cc.ryanc.halo.model.dto.base.OutputConverter;
+import cc.ryanc.halo.model.entity.Comment;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+
+import java.util.Date;
+
+/**
+ * Comment output dto.
+ *
+ * @author johnniang
+ */
+@Data
+@ToString
+@EqualsAndHashCode
+public class CommentOutputDTO implements OutputConverter<CommentOutputDTO, Comment> {
+
+    private Long id;
+
+    private String author;
+
+    private String email;
+
+    private String ipAddress;
+
+    private String gavatarMd5;
+
+    private String content;
+
+    private String userAgent;
+
+    private Long parentId;
+
+    private Boolean isAdmin;
+
+    private Date createTime;
+
+}

src/main/java/cc/ryanc/halo/model/dto/post/PostDetailOutputDTO.java

@@ -1,4 +1,4 @@
-package cc.ryanc.halo.model.dto;
+package cc.ryanc.halo.model.dto.post;
 
 import lombok.Data;
 import lombok.EqualsAndHashCode;

src/main/java/cc/ryanc/halo/model/dto/post/PostSimpleOutputDTO.java

@@ -1,7 +1,5 @@
-package cc.ryanc.halo.model.dto;
+package cc.ryanc.halo.model.dto.post;
 
-import cc.ryanc.halo.model.dto.base.OutputConverter;
-import cc.ryanc.halo.model.entity.Post;
 import cc.ryanc.halo.model.enums.PostCreateFrom;
 import cc.ryanc.halo.model.enums.PostType;
 import lombok.Data;
@@ -17,15 +15,8 @@ import java.util.Date;
  */
 @Data
 @ToString
-@EqualsAndHashCode
-public class PostSimpleOutputDTO implements OutputConverter<PostSimpleOutputDTO, Post> {
-
-    private Integer id;
-
-    /**
-     * 文章标题
-     */
-    private String title;
+@EqualsAndHashCode(callSuper = true)
+public class PostSimpleOutputDTO extends PostWithTitleDTO {
 
     /**
      * 文章类型

src/main/java/cc/ryanc/halo/model/dto/post/PostWithTitleDTO.java

@@ -0,0 +1,26 @@
+package cc.ryanc.halo.model.dto.post;
+
+import cc.ryanc.halo.model.dto.base.OutputConverter;
+import cc.ryanc.halo.model.entity.Post;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+
+/**
+ * Page with title only dto.
+ *
+ * @author johnniang
+ */
+@Data
+@ToString
+@EqualsAndHashCode
+public class PostWithTitleDTO implements OutputConverter<PostWithTitleDTO, Post> {
+
+    private Integer id;
+
+    /**
+     * 文章标题
+     */
+    private String title;
+
+}

src/main/java/cc/ryanc/halo/model/entity/Comment.java

@@ -69,6 +69,12 @@ public class Comment {
     @Column(name = "is_admin", columnDefinition = "tinyint default 0")
     private Boolean isAdmin;
 
+    /**
+     * Post id.
+     */
+    @Column(name = "post_id", columnDefinition = "int not null")
+    private Integer postId;
+
     /**
      * 上级评论
      */

src/main/java/cc/ryanc/halo/model/vo/CommentVO.java

@@ -0,0 +1,20 @@
+package cc.ryanc.halo.model.vo;
+
+import cc.ryanc.halo.model.dto.CommentOutputDTO;
+import cc.ryanc.halo.model.dto.post.PostWithTitleDTO;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+
+/**
+ * Comment vo.
+ *
+ * @author johnniang
+ */
+@Data
+@ToString
+@EqualsAndHashCode(callSuper = true)
+public class CommentVO extends CommentOutputDTO {
+
+    private PostWithTitleDTO post;
+}

src/main/java/cc/ryanc/halo/service/CommentService.java

@@ -1,7 +1,9 @@
 package cc.ryanc.halo.service;
 
 import cc.ryanc.halo.model.entity.Comment;
+import cc.ryanc.halo.model.vo.CommentVO;
 import cc.ryanc.halo.service.base.CrudService;
+import org.springframework.data.domain.Page;
 
 /**
  * Comment service.
@@ -10,4 +12,11 @@ import cc.ryanc.halo.service.base.CrudService;
  */
 public interface CommentService extends CrudService<Comment, Long> {
 
+    /**
+     * Lists latest comments.
+     *
+     * @param top top number must not be less than 0
+     * @return a page of comments
+     */
+    Page<CommentVO> listLatest(int top);
 }

src/main/java/cc/ryanc/halo/service/PostService.java

@@ -1,6 +1,6 @@
 package cc.ryanc.halo.service;
 
-import cc.ryanc.halo.model.dto.PostSimpleOutputDTO;
+import cc.ryanc.halo.model.dto.post.PostSimpleOutputDTO;
 import cc.ryanc.halo.model.entity.Post;
 import cc.ryanc.halo.service.base.CrudService;
 import org.springframework.data.domain.Page;

src/main/java/cc/ryanc/halo/service/impl/CommentServiceImpl.java

@@ -1,10 +1,22 @@
 package cc.ryanc.halo.service.impl;
 
+import cc.ryanc.halo.model.dto.post.PostWithTitleDTO;
 import cc.ryanc.halo.model.entity.Comment;
+import cc.ryanc.halo.model.entity.Post;
+import cc.ryanc.halo.model.vo.CommentVO;
 import cc.ryanc.halo.repository.CommentRepository;
 import cc.ryanc.halo.service.CommentService;
+import cc.ryanc.halo.service.PostService;
 import cc.ryanc.halo.service.base.AbstractCrudService;
+import cc.ryanc.halo.utils.ServiceUtils;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
+import org.springframework.util.Assert;
+
+import java.util.Map;
+import java.util.Set;
 
 /**
  * CommentService implementation class
@@ -17,8 +29,39 @@ public class CommentServiceImpl extends AbstractCrudService<Comment, Long> imple
 
     private final CommentRepository commentRepository;
 
-    public CommentServiceImpl(CommentRepository commentRepository) {
+    private final PostService postService;
+
+    public CommentServiceImpl(CommentRepository commentRepository,
+                              PostService postService) {
         super(commentRepository);
         this.commentRepository = commentRepository;
+        this.postService = postService;
+    }
+
+    @Override
+    public Page<CommentVO> listLatest(int top) {
+        Assert.isTrue(top > 0, "Top number must not be less than 0");
+
+        // Build page request
+        PageRequest latestPageable = PageRequest.of(0, top, Sort.by(Sort.Direction.DESC, "createTime"));
+
+        // List all comments
+        Page<Comment> comments = listAll(latestPageable);
+
+        // Fetch goods ids
+        Set<Integer> postIds = ServiceUtils.fetchProperty(comments.getContent(), Comment::getPostId);
+
+        // Get all posts
+        Map<Integer, Post> postMap = ServiceUtils.convertToMap(postService.listAllByIds(postIds), Post::getId);
+
+        return comments.map(comment -> {
+            // Convert to vo
+            CommentVO commentVO = new CommentVO().convertFrom(comment);
+
+            // Get post and set to the vo
+            commentVO.setPost(new PostWithTitleDTO().convertFrom(postMap.get(comment.getPostId())));
+
+            return commentVO;
+        });
     }
 }

src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java

@@ -1,6 +1,6 @@
 package cc.ryanc.halo.service.impl;
 
-import cc.ryanc.halo.model.dto.PostSimpleOutputDTO;
+import cc.ryanc.halo.model.dto.post.PostSimpleOutputDTO;
 import cc.ryanc.halo.model.entity.Post;
 import cc.ryanc.halo.repository.PostRepository;
 import cc.ryanc.halo.service.PostService;

src/main/java/cc/ryanc/halo/web/controller/admin/AdminController.java

@@ -1,6 +1,8 @@
 package cc.ryanc.halo.web.controller.admin;
 
-import cc.ryanc.halo.model.dto.PostSimpleOutputDTO;
+import cc.ryanc.halo.model.dto.LogOutputDTO;
+import cc.ryanc.halo.model.dto.post.PostSimpleOutputDTO;
+import cc.ryanc.halo.model.vo.CommentVO;
 import cc.ryanc.halo.service.AttachmentService;
 import cc.ryanc.halo.service.CommentService;
 import cc.ryanc.halo.service.LogService;
@@ -48,14 +50,20 @@ public class AdminController {
     @GetMapping(value = {"", "/index"})
     public String admin(Model model) {
 
-        Page<PostSimpleOutputDTO> postPage = postService.listLatest(10);
+        Page<PostSimpleOutputDTO> postPage = postService.listLatest(5);
+
+        Page<CommentVO> commentPage = commentService.listLatest(5);
+
+        Page<LogOutputDTO> logPage = logService.listLatest(5);
 
         model.addAttribute("postsCount", postPage.getTotalElements());
-        model.addAttribute("commentsCount", commentService.count());
+        model.addAttribute("commentsCount", commentPage.getTotalElements());
         model.addAttribute("attachmentsCount", attachmentService.count());
 
         model.addAttribute("latestPosts", postPage.getContent());
-        model.addAttribute("latestLogs", logService.listLatest(10).getContent());
+        model.addAttribute("latestLogs", logPage.getContent());
+        model.addAttribute("latestComments", commentPage.getContent());
+
         return "admin/admin_index";
     }
 }