Initial FastAPI admin auth scaffold

app/core/dependencies.py

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+from functools import lru_cache
+
+from app.common.repository.admin_user_repository import AdminUserRepository
+from app.core.config import Settings, get_settings
+from app.core.database import Database
+from app.lib.jwt.blacklist import InMemoryTokenBlacklist
+from app.lib.jwt.factory import JwtFactory
+from app.lib.response.admin_return import AdminReturn
+from app.service.admin.login.login_service import LoginService
+from app.service.admin.login.refresh_service import RefreshService
+from app.service.admin.profile.current_user_service import CurrentUserService
+from app.service.base_token_service import BaseTokenService
+
+
+# lru_cache 会缓存函数第一次创建出来的对象。
+# 这里用它把 Database、JwtFactory、TokenService 等依赖做成应用级单例，
+# 类似 Hyperf 从容器里反复 get 同一个共享服务。
+@lru_cache
+def get_database() -> Database:
+    return Database(get_settings().database_path)
+
+
+@lru_cache
+def get_token_blacklist() -> InMemoryTokenBlacklist:
+    return InMemoryTokenBlacklist()
+
+
+@lru_cache
+def get_jwt_factory() -> JwtFactory:
+    return JwtFactory(get_settings(), get_token_blacklist())
+
+
+@lru_cache
+def get_token_service() -> BaseTokenService:
+    return BaseTokenService(get_jwt_factory())
+
+
+@lru_cache
+def get_admin_return() -> AdminReturn:
+    return AdminReturn()
+
+
+@lru_cache
+def get_admin_user_repository() -> AdminUserRepository:
+    return AdminUserRepository(get_database())
+
+
+def get_login_service() -> LoginService:
+    return LoginService(
+        get_admin_user_repository(),
+        get_token_service(),
+        get_admin_return(),
+    )
+
+
+def get_refresh_service() -> RefreshService:
+    return RefreshService(get_token_service(), get_admin_return())
+
+
+def get_current_user_service() -> CurrentUserService:
+    return CurrentUserService(get_admin_user_repository(), get_admin_return())
+
+
+async def bootstrap_database(settings: Settings | None = None) -> None:
+    settings = settings or get_settings()
+    await get_database().initialize()
+    await get_admin_user_repository().ensure_seed_admin(
+        settings.admin_seed_username,
+        settings.admin_seed_password,
+    )