template_manager.py

import json
from typing import List, Dict
from recipe_manager import Recipe

TEMPLATES_FILE = "templates.json"

def load_templates() -> List[Recipe]:
    """Load all recipe templates from the JSON file."""
    try:
        with open(TEMPLATES_FILE, "r", encoding="utf-8") as f:
            data = json.load(f)
        return [Recipe.from_dict(item) for item in data]
    except (FileNotFoundError, json.JSONDecodeError):
        return []

def save_templates(templates: List[Recipe]):
    """Save all recipe templates to the JSON file."""
    with open(TEMPLATES_FILE, "w", encoding="utf-8") as f:
        json.dump([t.to_dict() for t in templates], f, ensure_ascii=False, indent=2)

def add_template(template: Recipe):
    """Add a new recipe template and save."""
    templates = load_templates()
    templates.append(template)
    save_templates(templates)

def search_templates(keyword: str) -> List[Recipe]:
    """Search templates by keyword in name or category."""
    templates = load_templates()
    return [t for t in templates if keyword.lower() in t.name.lower() or keyword.lower() in t.category.lower()]

def list_templates() -> List[Recipe]:
    """List all recipe templates."""
    return load_templates()