Mysql related functionality finished

mysql_related.py

@@ -0,0 +1,47 @@
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
+
+mysql_engine = None
+mysql_SessionLocal: async_sessionmaker
+
+
+def mysql_init(db_type: str, host: str, port: int, db_name: str, user: str, password: str):
+    """Initialize DB engine + session factory"""
+    global mysql_engine, mysql_SessionLocal
+
+    db_type = db_type
+    host = host
+    port = port
+    name = db_name
+    user = user
+    password = password
+
+    protocol = {
+        'mysql': 'mysql+aiomysql',
+        'postgresql': 'postgresql+asyncpg',
+    }
+
+    sqlalchemy_database_url = f"{protocol[db_type]}://{user}:{password}@{host}:{port}/{db_name}"
+    print(f"SQLAlchemy: {sqlalchemy_database_url}")
+    mysql_engine = create_async_engine(
+        sqlalchemy_database_url,
+        echo=False,
+        pool_size=5,
+        max_overflow=10
+    )
+    print(f"mysql_engine: {mysql_engine}")
+    mysql_SessionLocal = async_sessionmaker(
+        bind=mysql_engine,
+        expire_on_commit=False,
+        class_=AsyncSession,
+        autoflush=False
+    )
+    print(f"mysql_SessionLocal: {mysql_SessionLocal}")
+
+def get_session_local() -> AsyncSession:
+    return mysql_SessionLocal()
+
+
+async def get_mysql_db():
+    """FastAPI dependency for providing DB sessions"""
+    async with get_session_local() as session:
+       yield session