Merge pull request #21 from SlimusMinus/add-statistics

added statistics for create and found posts

src/main/java/com/krylov/refound/controller/StatisticsController.java

@@ -0,0 +1,20 @@
+package com.krylov.refound.controller;
+
+import com.krylov.refound.entity.Statistics;
+import com.krylov.refound.service.StatisticsService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/api/v1/statistics")
+public class StatisticsController {
+  private final StatisticsService statisticsService;
+
+  @GetMapping
+  public Statistics get() {
+    return statisticsService.getStatistics();
+  }
+}

src/main/java/com/krylov/refound/entity/Statistics.java

@@ -0,0 +1,20 @@
+package com.krylov.refound.entity;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Table(name = "statistics")
+@Getter
+@Setter
+public class Statistics {
+  @Id
+  private Long id;
+
+  private Long postsCreated;
+
+  private Long postsFound;
+}

src/main/java/com/krylov/refound/repository/StatisticsRepository.java

@@ -0,0 +1,8 @@
+package com.krylov.refound.repository;
+
+import com.krylov.refound.entity.Statistics;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface StatisticsRepository extends JpaRepository<Statistics, Long> {
+
+}

src/main/java/com/krylov/refound/service/PostService.java

@@ -35,6 +35,7 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.domain.Specification;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 
 @Service
@@ -50,6 +51,7 @@ public class PostService {
   private final FavoriteRepository favoriteRepository;
   private final FileStorageService fileStorageService;
   private final ContentModerationFacade contentModerationFacade;
+  private final StatisticsService statisticsService;
 
   public PostRequest create(PostRequest request, List<MultipartFile> images) {
 
@@ -75,6 +77,7 @@ public class PostService {
         imageRepository.save(img);
       }
     }
+    statisticsService.incrementCreated();
     return request;
   }
 
@@ -116,7 +119,7 @@ public class PostService {
     });
   }
 
-  public List <PostResponse> getById(Long id) {
+  public List<PostResponse> getById(Long id) {
     List<Post> posts = repository.findByUserId(id);
 
     List<Long> postIds = posts.stream()
@@ -150,7 +153,8 @@ public class PostService {
         .toList();
   }
 
-  public PostResponse update(Long id, PostRequest request, List<MultipartFile> images, List<String> existingUrls) {
+  public PostResponse update(Long id, PostRequest request, List<MultipartFile> images,
+      List<String> existingUrls) {
     Post post = repository.findById(id)
         .orElseThrow(() -> new ApiException(
             ErrorCode.NOT_FOUND,
@@ -234,6 +238,7 @@ public class PostService {
     repository.delete(post);
   }
 
+  @Transactional
   public PostResponse updateStatus(Long id, String statusString) {
     // Find the post
     Post post = repository.findById(id)
@@ -264,10 +269,13 @@ public class PostService {
       );
     }
 
+    if (post.getStatus() != PostStatus.CLOSED && statusString.equals(PostStatus.CLOSED.toString())) {
+      statisticsService.incrementFound();
+    }
+
     // Update status
     post.setStatus(newStatus);
     Post updated = repository.save(post);
-
     // Convert to response with like count
     PostResponse response = mapper.toResponse(updated);
 

src/main/java/com/krylov/refound/service/StatisticsService.java

@@ -0,0 +1,28 @@
+package com.krylov.refound.service;
+
+import com.krylov.refound.entity.Statistics;
+import com.krylov.refound.repository.StatisticsRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class StatisticsService {
+  private final StatisticsRepository repository;
+
+  public void incrementCreated() {
+    Statistics statistics = repository.findById(1L).orElseThrow();
+    statistics.setPostsCreated(statistics.getPostsCreated() + 1);
+  }
+
+  public void incrementFound() {
+    Statistics statistics = repository.findById(1L).orElseThrow();
+    statistics.setPostsFound(statistics.getPostsFound() + 1);
+  }
+
+  public Statistics getStatistics() {
+    return repository.findById(1L).orElseThrow();
+  }
+}

src/main/resources/db/changelog/create/009-create-statistic.yaml

@@ -0,0 +1,38 @@
+databaseChangeLog:
+  - changeSet:
+      id: 009-create-statistics
+      author: alexandr krylov
+      changes:
+        - createTable:
+            tableName: statistics
+            columns:
+              - column:
+                  name: id
+                  type: BIGINT
+                  constraints:
+                    primaryKey: true
+                    nullable: false
+              - column:
+                  name: posts_created
+                  type: BIGINT
+                  defaultValueNumeric: 0
+                  constraints:
+                    nullable: false
+              - column:
+                  name: posts_found
+                  type: BIGINT
+                  defaultValueNumeric: 0
+                  constraints:
+                    nullable: false
+        - insert:
+            tableName: statistics
+            columns:
+              - column:
+                  name: id
+                  valueNumeric: 1
+              - column:
+                  name: posts_created
+                  valueNumeric: 0
+              - column:
+                  name: posts_found
+                  valueNumeric: 0

src/main/resources/db/changelog/db.changelog-master.yaml

@@ -16,3 +16,4 @@ databaseChangeLog:
   - include: { file: db/changelog/add/005-add-user-avatarUrl.yaml }
   - include: { file: db/changelog/create/008-create-reviews.yaml }
   - include: { file: db/changelog/add/013-add-rules_accepted-posts.yaml}
+  - include: { file: db/changelog/create/009-create-statistic.yaml }