From 9ce5ff057029031cd2c8cde38d43491618116cdf Mon Sep 17 00:00:00 2001
From: gnatykdm <gnatykwork@gmail.com>
Date: Tue, 1 Jul 2025 22:29:41 +0200
Subject: [PATCH] DB-Connection(Implementation od Task&&Idea Services) C:2

---
 telegram_bot_project/service/idea.py |   6 ++
 telegram_bot_project/service/task.py | 152 +++++++++++++++++++++++++++
 2 files changed, 158 insertions(+)
 create mode 100644 telegram_bot_project/service/idea.py
 create mode 100644 telegram_bot_project/service/task.py

diff --git a/telegram_bot_project/service/idea.py b/telegram_bot_project/service/idea.py
new file mode 100644
index 0000000..0c4fcb8
--- /dev/null
+++ b/telegram_bot_project/service/idea.py
@@ -0,0 +1,6 @@
+from sqlalchemy import text
+from config import get_session
+
+# Must implement later :)
+class IdeaService:
+    pass
\ No newline at end of file
diff --git a/telegram_bot_project/service/task.py b/telegram_bot_project/service/task.py
new file mode 100644
index 0000000..c432ec5
--- /dev/null
+++ b/telegram_bot_project/service/task.py
@@ -0,0 +1,152 @@
+from sqlalchemy import text
+from config import get_session
+from typing import Any, List, Optional
+from datetime import datetime
+
+class TaskService:
+    @staticmethod
+    async def create_task(user_id: int, task_name: str, task_status: bool = False, start_time: Optional[datetime] = None) -> int:
+        async for session in get_session():
+            result: Any = await session.execute(
+                text(
+                    """
+                    INSERT INTO tasks (user_id, task_name, status, start_time)
+                    VALUES (:user_id, :task_name, :status, :start_time)
+                    RETURNING id
+                    """
+                ),
+                {
+                    "user_id": user_id,
+                    "task_name": task_name,
+                    "status": task_status,
+                    "start_time": start_time
+                }
+            )
+            task_id: int = result.scalar_one()
+            await session.commit()
+            return task_id
+        return None
+
+    @staticmethod
+    async def get_task_by_id(task_id: int) -> Optional[dict]:
+        async for session in get_session():
+            result: Any = await session.execute(
+                text(
+                    """
+                    SELECT id, user_id, task_name, status, start_time, creation_date
+                    FROM tasks
+                    WHERE id = :task_id
+                    """
+                ),
+                {"task_id": task_id}
+            )
+            task: int = result.fetchone()
+            if task:
+                return {
+                    "id": task.id,
+                    "user_id": task.user_id,
+                    "task_name": task.task_name,
+                    "status": task.status,
+                    "start_time": task.start_time,
+                    "creation_date": task.creation_date
+                }
+            return None
+        return None
+
+    @staticmethod
+    async def get_user_tasks(user_id: int) -> List[dict]:
+        async for session in get_session():
+            result: Any = await session.execute(
+                text(
+                    """
+                    SELECT id, user_id, task_name, status, start_time, creation_date
+                    FROM tasks
+                    WHERE user_id = :user_id
+                    ORDER BY creation_date DESC
+                    """
+                ),
+                {"user_id": user_id}
+            )
+            return [
+                {
+                    "id": task.id,
+                    "user_id": task.user_id,
+                    "task_name": task.task_name,
+                    "status": task.status,
+                    "start_time": task.start_time,
+                    "creation_date": task.creation_date
+                }
+                for task in result.fetchall()
+            ]
+        return None
+
+    @staticmethod
+    async def update_task(task_id: int, task_name: Optional[str] = None,
+                        status: Optional[bool] = None,
+                        start_time: Optional[datetime] = None) -> bool:
+        async for session in get_session():
+            exists: Any = await session.execute(
+                text("SELECT 1 FROM tasks WHERE id = :task_id"),
+                {"task_id": task_id}
+            )
+            if not exists.scalar():
+                return False
+
+            update_fields: Any = {}
+            if task_name is not None:
+                update_fields["task_name"] = task_name
+            if status is not None:
+                update_fields["status"] = status
+            if start_time is not None:
+                update_fields["start_time"] = start_time
+
+            if update_fields:
+                query: Any = text(
+                    f"""
+                    UPDATE tasks
+                    SET {', '.join(f'{k} = :{k}' for k in update_fields.keys())}
+                    WHERE id = :task_id
+                    """
+                )
+                update_fields["task_id"] = task_id
+                await session.execute(query, update_fields)
+                await session.commit()
+            return True
+        return None
+
+    @staticmethod
+    async def delete_task(task_id: int) -> bool:
+        async for session in get_session():
+            result: Any = await session.execute(
+                text(
+                    """
+                    DELETE FROM tasks
+                    WHERE id = :task_id
+                    RETURNING id
+                    """
+                ),
+                {"task_id": task_id}
+            )
+            deleted: Any = result.scalar_one_or_none()
+            await session.commit()
+            return deleted is not None
+        return None
+
+    @staticmethod
+    async def toggle_task_status(task_id: int) -> bool:
+        async for session in get_session():
+            result: Any = await session.execute(
+                text(
+                    """
+                    UPDATE tasks
+                    SET status = NOT status
+                    WHERE id = :task_id
+                    RETURNING id
+                    """
+                ),
+                {"task_id": task_id}
+            )
+            updated: Any = result.scalar_one_or_none()
+            await session.commit()
+            return updated is not None
+        return None
\ No newline at end of file