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Backend/services/diary_service.py

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+import os
+from datetime import datetime
+from typing import List, Optional
+from fastapi import UploadFile
+from ..schemas.diary import DiaryCreate, DiaryUpdate, Diary
+from ..utils.db import execute, fetch_one, fetch_all
+from ..utils.image_processor import ImageProcessor
+from ..utils.queries.diary import DiaryQueries
+
+
+class DiaryService:
+    def __init__(self):
+        self.image_processor = ImageProcessor()
+        self.upload_dir = "uploads/diary"
+        os.makedirs(self.upload_dir, exist_ok=True)
+
+    @staticmethod
+    async def init_db():
+        await execute(DiaryQueries.CREATE_TABLE)
+
+    async def create_diary(
+        self, user_id: int, diary_data: DiaryCreate, files: List[UploadFile]
+    ) -> Diary:
+        # image_path 는 ,로 구분 되어 있음
+        image_path = ""
+        if files is not None:
+            for file in files:
+                image_path += (
+                    ","
+                    + await self.image_processor.write_file_and_get_image_path(
+                        file, self.upload_dir
+                    )
+                )
+            image_path = image_path[1:]
+
+        query = DiaryQueries.INSERT_DIARY
+
+        created_at = datetime.now()
+        await execute(
+            query,
+            (
+                user_id,
+                diary_data.title,
+                diary_data.content,
+                image_path,
+                diary_data.category,
+                created_at,
+                False,
+                False,
+            ),
+        )
+
+        row = await fetch_one(
+            DiaryQueries.SELECT_LATEST_USER_DIARY,
+            (user_id,),
+        )
+
+        return Diary(**row)
+
+    async def get_user_diaries(
+        self, user_id: int, skip: int = 0, limit: int = 20, category: str = None
+    ) -> List[Diary]:
+        if category:
+            query = DiaryQueries.SELECT_USER_DIARIES_BY_CATEGORY
+            rows = await fetch_all(query, (user_id, category, limit, skip))
+        else:
+            query = DiaryQueries.SELECT_USER_DIARIES
+            rows = await fetch_all(query, (user_id, limit, skip))
+
+        return [Diary(**row) for row in rows]
+
+    async def get_diary_by_id(self, diary_id: int) -> Optional[Diary]:
+        query = DiaryQueries.SELECT_BY_ID
+        row = await fetch_one(query, (diary_id,))
+
+        if not row:
+            return None
+
+        return Diary(**row)
+
+    async def get_diary_with_user_id(
+        self, diary_id: int, user_id: int
+    ) -> Optional[Diary]:
+        query = DiaryQueries.SELECT_BY_ID_WITH_USER_ID
+        row = await fetch_one(query, (diary_id, user_id))
+
+        if not row:
+            return None
+
+        return Diary(**row)
+
+    async def update_diary(
+        self,
+        diary_id: int,
+        user_id: int,
+        diary_data: DiaryUpdate,
+        files: List[UploadFile],
+    ) -> Optional[Diary]:
+        diary = await self.get_diary_with_user_id(diary_id, user_id)
+        if not diary:
+            return None
+
+        update_fields = []
+        params = []
+
+        if diary_data.title is not None:
+            update_fields.append("title = ?")
+            params.append(diary_data.title)
+
+        if diary_data.content is not None:
+            update_fields.append("content = ?")
+            params.append(diary_data.content)
+
+        if diary_data.category is not None:
+            update_fields.append("category = ?")
+            params.append(diary_data.category)
+
+        if files is not None:
+            update_fields.append("images = ?")
+            image_paths = ""
+            for file in files:
+                image_paths += (
+                    ","
+                    + await self.image_processor.write_file_and_get_image_path(
+                        file, self.upload_dir
+                    )
+                )
+            image_paths = image_paths[1:]
+            params.append(image_paths)
+
+        if update_fields:
+            query = DiaryQueries.UPDATE_DIARY.format(fields=", ".join(update_fields))
+            params.extend([diary_id, user_id])
+            await execute(query, tuple(params))
+
+        return await self.get_diary_with_user_id(diary_id, user_id)
+
+    async def delete_diary(self, diary_id: int, user_id: int) -> bool:
+        try:
+            query = DiaryQueries.DELETE_DIARY
+            await execute(query, (diary_id, user_id))
+            return True
+        except Exception:
+            return False