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app.py
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app.py
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import os
import requests, json, re
from datetime import date, datetime
import configparser
from paho.mqtt.client import Client
from enum import IntEnum
class ErrorCode(IntEnum):
NO_ERROR = 0
GET_SHOPPING_LIST_ITEMS = 1
GET_VOLATILE = 2
GET_PRODUCT = 3
GET_USERFIELDS_PRODUCT = 4
ADD_PRODUCT_IN_SHOPPING_LIST = 5
GET_MEALPLAN = 6
CONSUME_PRODUCT = 7
CONSUME_RECIPE = 8
GET_PRODUCT_STOCK = 9
class Grocy:
def __init__(self, host, api_key, payload={}):
payload["errors"] = ErrorCode.NO_ERROR
self.grocy_host = host
self.grocy_api_key = api_key
self.payload = payload
def get_all_shopping_lists_items(self):
resp = requests.get(f'{self.grocy_host}/api/objects/shopping_list', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key})
if resp.status_code != 200:
self.payload["errors"] = ErrorCode.GET_SHOPPING_LIST_ITEMS
return resp.json()
def get_volatile_products(self):
resp = requests.get(f'{self.grocy_host}/api/stock/volatile?expiring_days=5', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key})
if resp.status_code != 200:
self.payload["errors"] = ErrorCode.GET_VOLATILE
return resp.json()
def get_product(self, id):
resp = requests.get(f'{self.grocy_host}/api/objects/products/{id}', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key})
if resp.status_code != 200:
self.payload["errors"] = ErrorCode.GET_PRODUCT
return resp.json()
def get_product_in_stock(self, id):
resp = requests.get(f'{self.grocy_host}/api/stock/products/{id}', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key})
if resp.status_code != 200:
self.payload["errors"] = ErrorCode.GET_PRODUCT_STOCK
return resp.json()
def get_userfields_product(self, id):
resp = requests.get(f'{self.grocy_host}/api/userfields/products/{id}', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key})
if resp.status_code != 200:
self.payload["errors"] = ErrorCode.GET_USERFIELDS_PRODUCT
return resp.json()
def add_product_in_shopping_list(self, product_id, list_id, product_amount=1, cause=None):
note = "Item added by grocy2mqtt"
if cause:
note = f"{note} cause: {cause}"
data = {
"product_id": product_id,
"list_id": list_id,
"product_amount": product_amount,
"note": note
}
resp = requests.post(f'{self.grocy_host}/api/stock/shoppinglist/add-product', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key}, data=data)
if resp.status_code != 204:
self.payload["errors"] = ErrorCode.ADD_PRODUCT_IN_SHOPPING_LIST
return resp.status_code
def manage_volatile_products(self, products, shopping_lists_items, cause=None):
for product in products:
min_stock_amount = product["min_stock_amount"]
if int(min_stock_amount) > 0:
id = product["id"]
userfields = self.get_userfields_product(id)
if self.payload["errors"]:
return
if not userfields:
continue
shoppinglist_id = userfields.get("shoppinglist")
if shoppinglist_id:
shoppinglist_item = next(filter(lambda item: item["shopping_list_id"] == shoppinglist_id and item["product_id"] == id, shopping_lists_items), None)
if not shoppinglist_item:
self.add_product_in_shopping_list(id, shoppinglist_id, cause=cause)
def get_mealplan(self):
resp = requests.get(f'{self.grocy_host}/api/objects/meal_plan', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key})
if resp.status_code != 200:
self.payload["errors"] = ErrorCode.GET_MEALPLAN
return resp.json()
def delete_mealplan(self, mealplan_id):
requests.delete(f'{self.grocy_host}/api/objects/meal_plan/{mealplan_id}', headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key})
# if resp.status_code != 204:
# self.payload["errors"] = ErrorCode.DELETE_MEALPLAN
# return resp.json()
def consume_product(self, product_id, product_amount):
resp = requests.post(
f'{self.grocy_host}/api/stock/products/{product_id}/consume',
headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key},
data={ "amount": product_amount, "transaction_type": "consume", "spoiled": "false" }
)
if resp.status_code != 200 and resp.status_code != 204:
self.payload["errors"] = ErrorCode.CONSUME_PRODUCT
def consume_recipe(self, recipe_id):
resp = requests.post(
f'{self.grocy_host}/api/recipes/{recipe_id}/consume',
headers={'accept': 'application/json', 'GROCY-API-KEY': self.grocy_api_key}
)
if resp.status_code != 200 and resp.status_code != 204:
self.payload["errors"] = ErrorCode.CONSUME_RECIPE
def int_or_zero(id):
numeric_id = 0
if id:
numeric_id = int(float(id))
return numeric_id
def __grocy_mealplan_list__(day=date.today(), diff_days=15):
grocy = Grocy(grocy_host, grocy_api, { "mealplan": [], "note": "" })
mealplanlist = grocy.get_mealplan()
for meal in mealplanlist:
daylist = meal['day'].split('-')
thatday = date(int(daylist[0]), int(daylist[1]), int(daylist[2]))
if (day - thatday).days > diff_days:
grocy.delete_mealplan(meal['id'])
elif thatday == day:
if meal['type'] != "note":
grocy.payload["mealplan"].append({
"id": int_or_zero(meal['id']),
"type": meal['type'],
"recipe_id": int_or_zero(meal['recipe_id']),
"recipe_servings": int_or_zero(meal['recipe_servings']),
"product_id": int_or_zero(meal["product_id"]),
"product_amount": int_or_zero(meal["product_amount"])
})
else:
grocy.payload["note"] = re.sub(r'[\r\n]*(<br />)+[\r\n]*|[\r\n]+', '\n', meal["note"])
return grocy.payload
def __grocy_mealplan_consume__(day=date.today()):
payload = __grocy_mealplan_list__(day)
if payload["errors"]:
return payload
grocy = Grocy(grocy_host, grocy_api, payload)
for p in payload["mealplan"]:
if p["type"] == "product":
grocy.consume_product(p["product_id"], p["product_amount"])
elif p["type"] == "recipe":
for i in range(0, int(p["recipe_servings"])):
grocy.consume_recipe(p["recipe_id"])
return grocy.payload
def __grocy_shoppinglists_add__():
grocy = Grocy(grocy_host, grocy_api, { "expiring": 0, "expired": 0, "missing": 0 })
shopping_lists_items = grocy.get_all_shopping_lists_items()
if grocy.payload["errors"] > 0:
return grocy.payload
volatile_products = grocy.get_volatile_products()
if grocy.payload["errors"] > 0:
return grocy.payload
expiring_products = []
expired_products = []
missing_products = []
if volatile_products.get("expiring_products"):
expiring_products = [product["product"] for product in volatile_products["expiring_products"]]
grocy.payload["expiring"] = len(expiring_products)
if volatile_products.get("expired_products"):
expired_products = [product["product"] for product in volatile_products["expired_products"]]
grocy.payload["expired"] = len(expired_products)
if volatile_products.get("missing_products"):
grocy.payload["missing"] = len(volatile_products["missing_products"])
missing_products = [grocy.get_product(missing_product["id"]) for missing_product in volatile_products["missing_products"]]
if grocy.payload["errors"] > 0:
return grocy.payload
grocy.manage_volatile_products(expiring_products, shopping_lists_items, cause="it's expiring")
grocy.manage_volatile_products(expired_products, shopping_lists_items, cause="it's expired")
if grocy.payload["errors"] > 0:
return grocy.payload
grocy.manage_volatile_products(missing_products, shopping_lists_items, cause="it's missing")
return grocy.payload
def on_connect(client, userdata, flags, rc):
print("Connected")
def on_disconnect(client, userdata, rc):
if rc != 0:
print(f"Unexpected disconnection. Error code: {rc}")
def __retrieve_date_from_payload(payload):
day = date.today()
if payload:
daylist = re.split(r"\D+", payload.decode("UTF-8"))
try:
day = date(int(daylist[0]), int(daylist[1]), int(daylist[2]))
except:
pass
return day
def on_message_grocy_mealplan_list(client, userdata, message):
day = __retrieve_date_from_payload(message.payload)
print(day)
payload = __grocy_mealplan_list__(day)
exists = len(payload.get("mealplan"))
payload["exists"] = exists
client.publish(TOPIC_HOME_MEALPLAN_LIST, payload=json.dumps(payload), qos=2)
def on_message_grocy_mealplan_consume(client, userdata, message):
day = __retrieve_date_from_payload(message.payload)
print(day)
payload = __grocy_mealplan_consume__(day)
client.publish(TOPIC_HOME_MEALPLAN_CONSUMED, payload=json.dumps(payload), qos=2)
def on_message_grocy_shoppinglists_add(client, userdata, message):
payload = __grocy_shoppinglists_add__()
client.publish(TOPIC_HOME_SHOPPINGLISTS_ADDED, payload=json.dumps(payload), qos=2)
def on_message_grocy_stock_get(client, userdata, message):
product_id = message.payload.decode("utf-8")
now = datetime.now()
date_time = now.strftime("%m/%d/%Y, %H:%M:%S")
print(date_time + " - " + product_id)
grocy = Grocy(grocy_host, grocy_api)
topic = TOPIC_HOME_PRODUCT_IN_STOCK + str(product_id)
product = grocy.get_product_in_stock(int(float(product_id)))
payload = json.dumps(product)
print(date_time + " - " + payload)
client.publish(topic, payload=payload, qos=2)
print("paylad " + payload + " published for product " + product_id)
def message_append(client, topic):
client.message_callback_add(topic[0], topic[2])
return (topic[0], topic[1])
config = configparser.ConfigParser()
config.read('config.ini')
if os.environ.get('GROCY_HOST'):
grocy_host = os.environ.get('GROCY_HOST')
else:
grocy_host = config['grocy']['host']
if os.environ.get('GROCY_API_KEY'):
grocy_api = os.environ.get('GROCY_API_KEY')
else:
grocy_api = config['grocy']['api_key']
if os.environ.get('MQTT_HOST'):
mqtt_host = os.environ.get('MQTT_HOST')
else:
mqtt_host = config['mqtt']['host']
if os.environ.get('MQTT_USER'):
mqtt_user = os.environ.get('MQTT_USER')
else:
mqtt_user = config['mqtt']['user']
if os.environ.get('MQTT_PWD'):
mqtt_password = os.environ.get('MQTT_PWD')
else:
mqtt_password = config['mqtt']['pwd']
TOPIC_HOME_MEALPLAN_LIST = "home/mealplan/list"
TOPIC_HOME_MEALPLAN_CONSUMED = "home/mealplan/consumed"
TOPIC_HOME_SHOPPINGLISTS_ADDED = "home/shoppinglists/added"
TOPIC_HOME_PRODUCT_IN_STOCK = "home/stock/"
TOPICS = (
("grocy/mealplan/list", 2, on_message_grocy_mealplan_list),
("grocy/mealplan/consume", 2, on_message_grocy_mealplan_consume),
("grocy/shoppinglists/add", 2, on_message_grocy_shoppinglists_add),
("grocy/stock/get", 2, on_message_grocy_stock_get)
)
if __name__ == "__main__":
client = Client(client_id="grocy")
client.on_connect = on_connect
client.on_disconnect = on_disconnect
tops = [message_append(client, topic) for topic in TOPICS]
if mqtt_user and mqtt_password:
client.username_pw_set(mqtt_user, password=mqtt_password)
print(mqtt_host)
print(grocy_host)
client.connect(mqtt_host, keepalive=300)
client.subscribe(tops)
client.loop_forever()