add some count API

src/main/java/com/springboot/blog/controller/PostController.java

@@ -66,6 +66,20 @@ public PostResponse getAllPosts(
         return postService.getAllPosts(pageNo, pageSize, sortBy, sortDir);
     }
 
+    @Operation(
+            summary = "Get Post By Id REST API",
+            description = "Get Post By Id REST API is used to get single post from the database"
+    )
+    @ApiResponse(
+            responseCode = "200",
+            description = "Http Status 200 SUCCESS"
+    )
+    // get post by id
+    @GetMapping("/count")
+    public int countAllPost() {
+        return postService.countAllPost();
+    }
+
     @Operation(
             summary = "Get Post By Id REST API",
             description = "Get Post By Id REST API is used to get single post from the database"
@@ -129,4 +143,9 @@ public ResponseEntity<List<PostDto>> getPostsByCategory(@PathVariable("id") Long
         List<PostDto> postDtos = postService.getPostsByCategory(categoryId);
         return ResponseEntity.ok(postDtos);
     }
+
+    @GetMapping("/category/{id}/count")
+    public int countPostsByCategory(@PathVariable("id") Long categoryId){
+        return postService.countPostByCategory(categoryId);
+    }
 }

src/main/java/com/springboot/blog/service/PostService.java

@@ -17,4 +17,9 @@ public interface PostService {
     void deletePostById(long id);
 
     List<PostDto> getPostsByCategory(Long categoryId);
+
+    int countAllPost();
+
+    int countPostByCategory(Long categoryId);
+
 }

src/main/java/com/springboot/blog/service/impl/PostServiceImpl.java

@@ -118,6 +118,16 @@ public List<PostDto> getPostsByCategory(Long categoryId) {
                 .collect(Collectors.toList());
     }
 
+    @Override
+    public int countAllPost() {
+        return 0;
+    }
+
+    @Override
+    public int countPostByCategory(Long categoryId) {
+        return 0;
+    }
+
     // convert Entity into DTO
     private PostDto mapToDTO(Post post){
         PostDto postDto = mapper.map(post, PostDto.class);