first commit

backend/app/services/auth.py

@@ -0,0 +1,34 @@
+import bcrypt
+from ..models import User
+
+
+class AuthService:
+    @staticmethod
+    def register(username, password, email=None):
+        if User.query.filter_by(username=username).first():
+            raise ValueError("用户名已存在")
+
+        if email and User.query.filter_by(email=email).first():
+            raise ValueError("邮箱已被使用")
+
+        hashed_password = bcrypt.hashpw(
+            password.encode("utf-8"), bcrypt.gensalt()
+        ).decode("utf-8")
+
+        user = User(username=username, password=hashed_password, email=email)
+        user.save()
+        return user
+
+    @staticmethod
+    def login(username, password):
+        user = User.query.filter_by(username=username).first()
+        if not user:
+            raise ValueError("用户名或密码错误")
+
+        if not bcrypt.checkpw(password.encode("utf-8"), user.password.encode("utf-8")):
+            raise ValueError("用户名或密码错误")
+
+        if not user.is_active:
+            raise ValueError("用户已被禁用")
+
+        return user