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src/main/java/com/android/mobileappserver/Report/ReportController.java

@@ -0,0 +1,21 @@
+package com.android.mobileappserver.Report;
+
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("api/report")
+public class ReportController {
+    private final ReportService reportService;
+
+    public ReportController(ReportService reportService){
+        this.reportService = reportService;
+    }
+
+    @PostMapping("/createReport")
+    public ReportDTO createReport(@RequestBody ReportCreateDTO reportCreateDTO){
+        return reportService.createReport(reportCreateDTO);
+    }
+}

src/main/java/com/android/mobileappserver/Report/ReportCreateDTO.java

@@ -0,0 +1,12 @@
+package com.android.mobileappserver.Report;
+
+import lombok.*;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class ReportCreateDTO {
+    private Long dateFrom;
+    private Long dateTo;
+}

src/main/java/com/android/mobileappserver/Report/ReportDTO.java

@@ -0,0 +1,24 @@
+package com.android.mobileappserver.Report;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class ReportDTO {
+    private Long dateFrom;
+    private Long dateTo;
+    private int postCount;
+    private String mostPostAuthor;
+    private int mostPostCount;
+
+    public ReportDTO(Long dateFrom, Long dateTo, int postCount, String mostPostAuthor, int mostPostCount){
+        this.dateFrom = dateFrom;
+        this.dateTo = dateTo;
+        this.postCount = postCount;
+        this.mostPostAuthor = mostPostAuthor;
+        this.mostPostCount = mostPostCount;
+    }
+}

src/main/java/com/android/mobileappserver/Report/ReportService.java

@@ -0,0 +1,41 @@
+package com.android.mobileappserver.Report;
+
+import com.android.mobileappserver.Story.StoryModel;
+import com.android.mobileappserver.Story.StoryService;
+import com.android.mobileappserver.User.UserService;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class ReportService {
+    private final UserService userService;
+    private final StoryService storyService;
+
+    public ReportService(UserService userService, StoryService storyService){
+        this.userService = userService;
+        this.storyService = storyService;
+    }
+
+    @Transactional
+    public ReportDTO createReport(ReportCreateDTO reportCreateDTO){
+        List<StoryModel> stories = storyService.getStoriesByDate(reportCreateDTO.getDateFrom(), reportCreateDTO.getDateTo());
+        int postCount = stories.size();
+        Map<String, Integer> authorWithCount = new HashMap<>();
+        for (var story: stories) {
+            String authorName = story.getUser().getLogin();
+            if (authorWithCount.containsKey(authorName)) {
+                // Если автор уже есть, увеличиваем количество историй
+                authorWithCount.put(authorName, authorWithCount.get(authorName) + 1);
+            } else {
+                // Если автора еще нет в мапе, добавляем его с количеством 1
+                authorWithCount.put(authorName, 1);
+            }
+        }
+        Map.Entry<String, Integer> maxEntry = Collections.max(authorWithCount.entrySet(), Map.Entry.comparingByValue());
+        return new ReportDTO(reportCreateDTO.getDateFrom(), reportCreateDTO.getDateTo(),
+                postCount, maxEntry.getKey(), maxEntry.getValue());
+    }
+}

src/main/java/com/android/mobileappserver/Story/StoryRepository.java

@@ -3,7 +3,14 @@ package com.android.mobileappserver.Story;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+import java.util.List;
 
 public interface StoryRepository extends JpaRepository<StoryModel, Long> {
     Page<StoryModel> findAllByUserId(Long userIdб, Pageable pageable);
+
+    @Query("SELECT s FROM _story s WHERE s.dateFrom = :dateFrom AND s.dateTo = :dateTo")
+    List<StoryModel> findStoriesBetweenDates(@Param("dateFrom") Long dateFrom, @Param("dateTo") Long dateTo);
 }

src/main/java/com/android/mobileappserver/Story/StoryService.java

@@ -7,6 +7,7 @@ import org.springframework.transaction.annotation.Transactional;
 import org.springframework.stereotype.Service;
 
 import java.nio.charset.StandardCharsets;
+import java.util.List;
 import java.util.Optional;
 
 @Service
@@ -64,4 +65,9 @@ public class StoryService {
     public Page<StoryModel> getUserStoryPaged(Long userId, int page, int size){
         return storyRepository.findAllByUserId(userId, PageRequest.of(page - 1, size));
     }
+
+    @Transactional
+    public List<StoryModel> getStoriesByDate(Long dateFrom, Long dateTo){
+        return storyRepository.findStoriesBetweenDates(dateFrom, dateTo);
+    }
 }