init

new-planet-backend/app/utils/__init__.py

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+from app.utils.validators import validate_email, validate_password
+from app.utils.helpers import format_datetime, format_date, dict_to_json, json_to_dict
+
+__all__ = [
+    "validate_email",
+    "validate_password",
+    "format_datetime",
+    "format_date",
+    "dict_to_json",
+    "json_to_dict",
+]
+

new-planet-backend/app/utils/helpers.py

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+from typing import Any, Dict
+from datetime import datetime, date
+import json
+
+
+def format_datetime(dt: datetime) -> str:
+    """Форматирование datetime в ISO строку"""
+    return dt.isoformat()
+
+
+def format_date(d: date) -> str:
+    """Форматирование date в ISO строку"""
+    return d.isoformat()
+
+
+def dict_to_json(data: Dict[str, Any]) -> str:
+    """Преобразование словаря в JSON строку"""
+    return json.dumps(data, ensure_ascii=False, default=str)
+
+
+def json_to_dict(json_str: str) -> Dict[str, Any]:
+    """Преобразование JSON строки в словарь"""
+    return json.loads(json_str)
+

new-planet-backend/app/utils/validators.py

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+from typing import Optional
+import re
+from pydantic import EmailStr, validator
+
+
+def validate_email(email: str) -> bool:
+    """Валидация email"""
+    pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
+    return bool(re.match(pattern, email))
+
+
+def validate_password(password: str) -> tuple[bool, Optional[str]]:
+    """Валидация пароля"""
+    if len(password) < 8:
+        return False, "Password must be at least 8 characters long"
+    
+    if not re.search(r'[A-Z]', password):
+        return False, "Password must contain at least one uppercase letter"
+    
+    if not re.search(r'[a-z]', password):
+        return False, "Password must contain at least one lowercase letter"
+    
+    if not re.search(r'\d', password):
+        return False, "Password must contain at least one digit"
+    
+    return True, None
+