munch-ease-backend/recipes/__init__.py

from persons import Person

from recipes.db import Recipe, insert_recipe, find_recipe_by_id, get_all, find_recipes_by_name, row_to_recipe, load_recipe_ingredients, hide_recipe
from recipes.scraping import scrape_recipe_ldata as _scrape_recipe_ldata
from ingredients import parse_ingredient_from_nlp, match_existing_products

import re

async def parse_recipe(conn, created_by: Person, url: str) -> Recipe:
    ldata = await _scrape_recipe_ldata(url)
    if ldata:
        return await _get_recipe_from_ldata(conn, url, ldata, created_by)
    return None

def find_yield(recipe_ldata: dict) -> int:
    if 'recipeYield' in recipe_ldata:
        yield_vals = recipe_ldata['recipeYield']
        if not isinstance(yield_vals, list):
            yield_vals = [yield_vals]

        for val in yield_vals:
            try:
                return int(val)
            except ValueError:
                pass

        for val in yield_vals:
            match = re.match(r'(\d+)', val)
            if match:
                return int(match.group(1))

    return 4
    
async def _get_recipe_from_ldata(conn, url: str, ldata: dict, created_by: Person) -> dict:
    ingredients = [parse_ingredient_from_nlp(ingredient) for ingredient in ldata['recipeIngredient']]
    ingredients = await match_existing_products(conn, ingredients)
    name = ldata['name'] if 'name' in ldata else url
    images = ldata['image'] if 'image' in ldata else []
    serves = find_yield(ldata)
    
    if isinstance(images, list) and len(images) > 0 and isinstance(images[0], dict):
        images = [image['url'] for image in images]

    if isinstance(images, dict):
        images = [images['url']]

    if isinstance(images, str):
        images = [images]

    return Recipe(
        id=0,
        name=name,
        link=url,
        serves=serves,
        image_urls=images,
        ingredients=ingredients,
        created_by=created_by,
        created_by_id=created_by.id,
    )