seed for the first user creation

main.py

@@ -4,6 +4,7 @@ from pathlib import Path
 # import uvicorn
 from fastapi import FastAPI
 
+from src.database.users.crud import Seed
 from src.logging.logger import LoggingMiddleware, ProcessingTimeMiddleware
 from src.web.protected_routes.auth_routes import router as protected_router
 from src.web.protected_routes.protected_user_action_routes import (
@@ -14,8 +15,8 @@ from src.web.protected_routes.protected_user_action_routes import (
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     create_dirs()
+    await create_first_user()
     yield
-    print("shutting down")
     
 
 app=FastAPI(root_path="/", lifespan=lifespan)
@@ -30,7 +31,7 @@ async def root()->dict:
     return {"root":"hello, this is root"}
 
 
-def create_dirs():
+def create_dirs()->None:
     
     dirs_to_create=("./DB",
                     "./uploads/upload",
@@ -39,4 +40,9 @@ def create_dirs():
                     "./logs")
     
     for x in dirs_to_create:
-        Path(x).mkdir(parents=True, exist_ok=True)
+        Path(x).mkdir(parents=True, exist_ok=True)
+
+async def create_first_user()->None:    
+    seed=Seed()
+    await seed.seed()
+    

src/database/users/crud.py

@@ -10,6 +10,7 @@ from src.models.database_models.model import (
     engine,
 )
 from src.models.pydantic_models.model import UserOutDB
+from src.service.auth.jwt import HashService
 
 
 class UsersCrudActions:
@@ -121,4 +122,36 @@ class UsersCrudActions:
                 user_edit.direct_permissions=list(groups)
             
             await session.flush()
-            return UserOutDB.model_validate(user_edit)
+            return UserOutDB.model_validate(user_edit)
+
+class Seed:
+    def __init__(self) -> None:
+        self.Session=async_sessionmaker(bind=engine)
+        self.hash_service=HashService()
+    
+    async def seed(self) -> None:
+        async with self.Session() as session, session.begin():
+            
+            existing = (await session.execute(select(User).limit(1))).scalar_one_or_none()
+            if existing is not None:
+                print("Seed skipped: one user is already exist")
+                return
+
+            admin_permission = Permissions(permission="admin")
+            session.add(admin_permission)
+
+            admin_group = PermissionsGroups(group="admin_group", permissions=[admin_permission])
+            session.add(admin_group)
+
+            admin_user = User(
+                first_name="Admin",
+                last_name="Admin",
+                middle_name="Admin",
+                email="admin@admin.com",
+                hashed_password=self.hash_service.plain_to_hash("1234"),
+                direct_permissions=[admin_permission],
+                group=[admin_group],
+            )
+            session.add(admin_user)
+
+            print("Seed completed: admin user and permissions are created, credentials: email - admin@admin.com,  password - 1234")