✨ Feature: 이미지 평균값 추출 기능 구현 (#47)

* ✨ Feature: 이미지 평균값 추출 기능 구현

* ✨ Feature: 일기 생성 로직에서 평균값 추출 로직 호출

* 📝 Docs: DiaryRequest example 작성

moodoodle-api/src/main/java/zzangdol/moodoodleapi/diary/business/DiaryFacade.java

@@ -7,10 +7,11 @@
 import zzangdol.emotion.domain.Emotion;
 import zzangdol.moodoodleapi.diary.implement.DiaryCommandService;
 import zzangdol.moodoodleapi.diary.implement.DiaryQueryService;
+import zzangdol.moodoodleapi.diary.implement.ImageColorAnalyzer;
 import zzangdol.moodoodleapi.diary.presentation.dto.request.DiaryCreateRequest;
 import zzangdol.moodoodleapi.diary.presentation.dto.request.DiaryUpdateRequest;
-import zzangdol.moodoodleapi.diary.presentation.dto.response.DiaryResponse;
 import zzangdol.moodoodleapi.diary.presentation.dto.response.DiaryListResponse;
+import zzangdol.moodoodleapi.diary.presentation.dto.response.DiaryResponse;
 import zzangdol.user.domain.User;
 
 @RequiredArgsConstructor
@@ -20,14 +21,12 @@ public class DiaryFacade {
     private final DiaryCommandService diaryCommandService;
     private final DiaryQueryService diaryQueryService;
 //    private final TextEmotionAnalysisModelClient textEmotionAnalysisModelClient;
-//    private final ImageColorAnalyzer imageColorAnalyzer;
+    private final ImageColorAnalyzer imageColorAnalyzer;
 
     public Long createDiary(User user, DiaryCreateRequest request) {
         // TODO List<Emotion> emotions = textEmotionAnalysisModelClient.analyzeEmotion(request.getContent());
         List<Emotion> emotions = new ArrayList<>();
-
-        // TODO String color = imageColorAnalyzer.analyzeColor(request.getImageUrl());
-        String color = "";
+         String color = imageColorAnalyzer.analyzeAverageColorAsHex(request.getImageUrl());
         return diaryCommandService.createDiary(user, request, color, emotions).getId();
     }
 

moodoodle-api/src/main/java/zzangdol/moodoodleapi/diary/business/DiaryMapper.java

@@ -5,8 +5,8 @@
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 import zzangdol.diary.domain.Diary;
-import zzangdol.moodoodleapi.diary.presentation.dto.response.DiaryResponse;
 import zzangdol.moodoodleapi.diary.presentation.dto.response.DiaryListResponse;
+import zzangdol.moodoodleapi.diary.presentation.dto.response.DiaryResponse;
 
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class DiaryMapper {

moodoodle-api/src/main/java/zzangdol/moodoodleapi/diary/implement/ImageColorAnalyzer.java

@@ -0,0 +1,46 @@
+package zzangdol.moodoodleapi.diary.implement;
+
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.net.URL;
+import javax.imageio.ImageIO;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ImageColorAnalyzer {
+
+    public String analyzeAverageColorAsHex(String imageUrl) {
+        try {
+            int[] averageColor = getAverageColor(imageUrl);
+            return rgbToHex(averageColor[0], averageColor[1], averageColor[2]);
+        } catch (Exception e) {
+            return "#ffffff";
+        }
+    }
+
+    private int[] getAverageColor(String imageUrl) throws IOException {
+        URL url = new URL(imageUrl);
+        BufferedImage image = ImageIO.read(url);
+
+        long sumR = 0, sumG = 0, sumB = 0;
+        int width = image.getWidth();
+        int height = image.getHeight();
+        int count = width * height;
+
+        for (int x = 0; x < width; x++) {
+            for (int y = 0; y < height; y++) {
+                int pixel = image.getRGB(x, y);
+                sumR += (pixel >> 16) & 0xff;
+                sumG += (pixel >> 8) & 0xff;
+                sumB += pixel & 0xff;
+            }
+        }
+
+        return new int[]{(int) (sumR / count), (int) (sumG / count), (int) (sumB / count)};
+    }
+
+    private String rgbToHex(int red, int green, int blue) {
+        return String.format("#%02x%02x%02x", red, green, blue);
+    }
+
+}

moodoodle-api/src/main/java/zzangdol/moodoodleapi/diary/presentation/dto/request/DiaryCreateRequest.java

@@ -1,5 +1,6 @@
 package zzangdol.moodoodleapi.diary.presentation.dto.request;
 
+import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.LocalDateTime;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
@@ -12,8 +13,13 @@
 @AllArgsConstructor
 public class DiaryCreateRequest {
 
+    @Schema(example = "2024-04-21T21:10")
     private LocalDateTime date;
+
+    @Schema(example = "오늘은 오랜만에 친구들과 놀이공원에 다녀왔다. 정말 신나는 하루였다. 집에 돌아오는 길에는 조금 허전하고 아쉬운 마음도 들었지만, 오늘 하루 친구들과 함께 할 수 있어서 정말 행복했다.")
     private String content;
+
+    @Schema(example = "https://github.com/ahnsugyeong/ahnsugyeong/assets/88311377/5913c88f-ecde-495c-8c36-71a43e1c8a8d")
     private String imageUrl;
 
 }

moodoodle-api/src/main/java/zzangdol/moodoodleapi/diary/presentation/dto/request/DiaryUpdateRequest.java

@@ -1,5 +1,6 @@
 package zzangdol.moodoodleapi.diary.presentation.dto.request;
 
+import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.LocalDateTime;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
@@ -12,7 +13,10 @@
 @AllArgsConstructor
 public class DiaryUpdateRequest {
 
+    @Schema(example = "2024-04-20T21:10")
     private LocalDateTime date;
+
+    @Schema(example = "오늘은 오랜만에 친구들과 놀이공원에 다녀왔다. 츄러스도 먹고 정말 신나는 하루였다. 집에 돌아오는 길에는 조금 허전하고 아쉬운 마음도 들었지만, 오늘 하루 친구들과 함께 할 수 있어서 정말 행복했다.")
     private String content;
 
 }