141 lines
6.4 KiB
Python
141 lines
6.4 KiB
Python
from decimal import Decimal
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from functools import wraps
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from django.contrib.postgres.search import SearchVector
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from django.db.models.signals import post_save
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from django.dispatch import receiver
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from django.utils import translation
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from cookbook.helper.shopping_helper import list_from_recipe
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from cookbook.managers import DICTIONARY
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from cookbook.models import (Food, FoodInheritField, Ingredient, MealPlan, Recipe,
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ShoppingListEntry, Step)
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# wraps a signal with the ability to set 'skip_signal' to avoid creating recursive signals
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def skip_signal(signal_func):
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@wraps(signal_func)
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def _decorator(sender, instance, **kwargs):
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if not instance:
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return None
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if hasattr(instance, 'skip_signal'):
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return None
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return signal_func(sender, instance, **kwargs)
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return _decorator
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@receiver(post_save, sender=Recipe)
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@skip_signal
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def update_recipe_search_vector(sender, instance=None, created=False, **kwargs):
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language = DICTIONARY.get(translation.get_language(), 'simple')
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instance.name_search_vector = SearchVector('name__unaccent', weight='A', config=language)
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instance.desc_search_vector = SearchVector('description__unaccent', weight='C', config=language)
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try:
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instance.skip_signal = True
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instance.save()
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finally:
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del instance.skip_signal
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@receiver(post_save, sender=Step)
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@skip_signal
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def update_step_search_vector(sender, instance=None, created=False, **kwargs):
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language = DICTIONARY.get(translation.get_language(), 'simple')
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instance.search_vector = SearchVector('instruction__unaccent', weight='B', config=language)
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try:
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instance.skip_signal = True
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instance.save()
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finally:
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del instance.skip_signal
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@receiver(post_save, sender=Food)
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@skip_signal
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def update_food_inheritance(sender, instance=None, created=False, **kwargs):
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if not instance:
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return
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inherit = Food.inherit_fields.difference(instance.ignore_inherit.all())
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# nothing to apply from parent and nothing to apply to children
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if (not instance.inherit or not instance.parent or inherit.count() == 0) and instance.numchild == 0:
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return
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inherit = inherit.values_list('field', flat=True)
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# apply changes from parent to instance for each inheritted field
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if instance.inherit and instance.parent and inherit.count() > 0:
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parent = instance.get_parent()
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if 'ignore_shopping' in inherit:
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instance.ignore_shopping = parent.ignore_shopping
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# if supermarket_category is not set, do not cascade - if this becomes non-intuitive can change
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if 'supermarket_category' in inherit and parent.supermarket_category:
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instance.supermarket_category = parent.supermarket_category
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try:
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instance.skip_signal = True
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instance.save()
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finally:
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del instance.skip_signal
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# TODO figure out how to generalize this
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# apply changes to direct children - depend on save signals for those objects to cascade inheritance down
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_save = []
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for child in instance.get_children().filter(inherit=True).exclude(ignore_inherit__field='ignore_shopping'):
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child.ignore_shopping = instance.ignore_shopping
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_save.append(child)
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# don't cascade empty supermarket category
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if instance.supermarket_category:
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# apply changes to direct children - depend on save signals for those objects to cascade inheritance down
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for child in instance.get_children().filter(inherit=True).exclude(ignore_inherit__field='supermarket_category'):
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child.supermarket_category = instance.supermarket_category
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_save.append(child)
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for child in set(_save):
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child.save()
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@receiver(post_save, sender=MealPlan)
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def auto_add_shopping(sender, instance=None, created=False, weak=False, **kwargs):
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user = instance.get_owner()
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if not created or not user.userpreference.mealplan_autoadd_shopping:
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return
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# if creating a mealplan - perform shopping list activities
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space = instance.space
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if user.userpreference.mealplan_autoadd_shopping:
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kwargs = {
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'mealplan': instance,
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'space': space,
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'created_by': user,
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'servings': instance.servings
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}
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recipe_ingredients = Ingredient.objects.filter(step__recipe=instance.recipe, space=space)
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if exclude_onhand := user.userpreference.mealplan_autoexclude_onhand:
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recipe_ingredients = recipe_ingredients.exclude(food__on_hand=True)
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if related := user.userpreference.mealplan_autoinclude_related:
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# TODO: add levels of related recipes to use when auto-adding mealplans
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related_recipes = instance.recipe.get_related_recipes()
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# dont' add recipes that are going to have their recipes added to the shopping list
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kwargs['ingredients'] = recipe_ingredients.exclude(food__recipe__in=related_recipes).values_list('id', flat=True)
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else:
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kwargs['ingredients'] = recipe_ingredients.values_list('id', flat=True)
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list_recipe = list_from_recipe(**kwargs)
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if related:
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servings_factor = Decimal(instance.servings / instance.recipe.servings)
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kwargs['list_recipe'] = list_recipe
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food_recipes = recipe_ingredients.filter(food__recipe__in=related_recipes).values('food__recipe', 'amount')
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for recipe in related_recipes:
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kwargs['ingredients'] = []
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if exclude_onhand:
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kwargs['ingredients'] = Ingredient.objects.filter(step__recipe=recipe, food__on_hand=False, space=space).values_list('id', flat=True)
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kwargs['recipe'] = recipe
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# assume related recipes are intended to be 'full sized' to parent recipe
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# Recipe1 (servings:4) includes StepRecipe2(servings:2) a Meal Plan serving size of 8 would assume 4 servings of StepRecipe2
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if recipe.id in [x['food__recipe'] for x in food_recipes if x['food__recipe'] == recipe.id]:
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kwargs['servings'] = Decimal(recipe.servings) * sum([x['amount'] for x in food_recipes if x['food__recipe'] == recipe.id]) * servings_factor
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else:
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# TODO: When modifying step recipes to allow serving size - will need to update this
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kwargs['servings'] = Decimal(recipe.servings) * servings_factor
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list_from_recipe(**kwargs, append=True)
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