Add helper functions for Food

helpers/food_helpers.py

@@ -0,0 +1,114 @@
+from typing import List, Dict, Optional, Union, Any
+from datetime import datetime
+from sqlalchemy.orm import Session
+from sqlalchemy import and_, or_
+from models.food import Food
+from schemas.food import FoodCreate, FoodUpdate
+
+def get_available_menu_items(db: Session) -> List[Food]:
+    """
+    Get all currently available food items in the menu.
+    
+    Args:
+        db: Database session
+        
+    Returns:
+        List of available Food objects
+    """
+    return db.query(Food).filter(Food.is_available == True).all()
+
+def filter_menu_by_category(db: Session, category: str) -> List[Food]:
+    """
+    Filter menu items by food category.
+    
+    Args:
+        db: Database session
+        category: Food category to filter by
+        
+    Returns:
+        List of Food objects in the specified category
+    """
+    return db.query(Food).filter(
+        and_(
+            Food.category == category,
+            Food.is_available == True
+        )
+    ).all()
+
+def search_menu_items(
+    db: Session, 
+    search_term: str,
+    category: Optional[str] = None
+) -> List[Food]:
+    """
+    Search menu items by name or description.
+    
+    Args:
+        db: Database session
+        search_term: Term to search for
+        category: Optional category filter
+        
+    Returns:
+        List of matching Food objects
+    """
+    query = db.query(Food).filter(
+        and_(
+            Food.is_available == True,
+            or_(
+                Food.name.ilike(f"%{search_term}%"),
+                Food.description.ilike(f"%{search_term}%")
+            )
+        )
+    )
+    
+    if category:
+        query = query.filter(Food.category == category)
+        
+    return query.all()
+
+def format_menu_item(food: Food) -> Dict[str, Any]:
+    """
+    Format a food item for API response.
+    
+    Args:
+        food: Food object to format
+        
+    Returns:
+        Formatted food item dictionary
+    """
+    return {
+        "id": food.id,
+        "name": food.name,
+        "description": food.description,
+        "price": float(food.price),
+        "category": food.category,
+        "is_vegetarian": food.is_vegetarian,
+        "calories": food.calories,
+        "image_url": food.image_url
+    }
+
+def validate_food_data(food_data: Union[FoodCreate, FoodUpdate]) -> Dict[str, str]:
+    """
+    Validate food item data before creation/update.
+    
+    Args:
+        food_data: Food data to validate
+        
+    Returns:
+        Dictionary with error message if validation fails, empty dict if successful
+    """
+    errors = {}
+    
+    if food_data.price <= 0:
+        errors["price"] = "Price must be greater than 0"
+        
+    if food_data.calories < 0:
+        errors["calories"] = "Calories cannot be negative"
+        
+    if len(food_data.name) < 2:
+        errors["name"] = "Name must be at least 2 characters long"
+        
+    if len(food_data.description) < 10:
+        errors["description"] = "Description must be at least 10 characters long"
+        
+    return errors