def order_updated(_item):
if _item.event_action != 'entity_updated':
return
order = json.loads(_item.event_data)
if order['status'] != 'IN_STOCK':
return
rsp = send_message('read-model', 'get_entity', {
'name': 'cart',
'id': order['cart_id']
})
cart = rsp['result']
if not cart:
logging.error('could not find cart {} for order {}'.format(
order['cart_id'], order['entity_id']))
return
rsp = send_message('read-model', 'get_entity', {
'name': 'customer',
'id': cart['customer_id']
})
customer = rsp['result']
if not customer:
logging.error('could not find customer {} for cart {}'.format(
cart['customer_id'], cart['entity_id']))
return
rsp = send_message('read-model', 'get_entities', {
'name': 'product',
'ids': cart['product_ids']
})
products = rsp['result']
if not all(products) and not len(products) == len(cart['product_ids']):
logging.error('could not find all products for cart {}'.format(
cart['entity_id']))
return
msg = """Dear {}!
Please transfer € {} with your favourite payment method.
Cheers""".format(customer['name'],
sum([int(product['price']) for product in products]))
send_message_async('mail-service', 'send', {
"to": customer['email'],
"msg": msg
})
def customer_deleted(_item):
if _item.event_action != 'entity_deleted':
return
customer = json.loads(_item.event_data)
msg = """Dear {}!
Good bye, hope to see you soon again at Ordershop.
Cheers""".format(customer['name'])
send_message_async('mail-service', 'send', {
"to": customer['email'],
"msg": msg
})
def customer_created(_item):
if _item.event_action != 'entity_created':
return
customer = json.loads(_item.event_data)
msg = """Dear {}!
Welcome to Ordershop.
Cheers""".format(customer['name'])
send_message_async('mail-service', 'send', {
"to": customer['email'],
"msg": msg
})
def shipping_created(_item):
if _item.event_action != 'entity_created':
return
shipping = json.loads(_item.event_data)
rsp = send_message('read-model', 'get_entity', {
'name': 'order',
'id': shipping['order_id']
})
order = rsp['result']
if not order:
logging.error('could not find order {} for shipping {}'.format(
shipping['order_id'], shipping['entity_id']))
return
rsp = send_message('read-model', 'get_entity', {
'name': 'cart',
'id': order['cart_id']
})
cart = rsp['result']
if not cart:
logging.error('could not find cart {} for order {}'.format(
order['cart_id'], order['entity_id']))
return
rsp = send_message('read-model', 'get_entity', {
'name': 'customer',
'id': cart['customer_id']
})
customer = rsp['result']
if not customer:
logging.error('could not find customer {} for cart {}'.format(
cart['customer_id'], cart['entity_id']))
return
msg = """Dear {}!
We've just shipped order {}. It will be soon delivered to you.
Cheers""".format(customer['name'], order['entity_id'])
send_message_async('mail-service', 'send', {
"to": customer['email'],
"msg": msg
})
def billing_created(_item):
if _item.event_action != 'entity_created':
return
billing = json.loads(_item.event_data)
rsp = send_message('read-model', 'get_entity', {
'name': 'order',
'id': billing['order_id']
})
order = rsp['result']
if not order:
logging.error('could not find order {} for billing {}'.format(
billing['order_id'], billing['entity_id']))
return
rsp = send_message('read-model', 'get_entity', {
'name': 'cart',
'id': order['cart_id']
})
cart = rsp['result']
if not cart:
logging.error('could not find cart {} for order {}'.format(
order['cart_id'], order['entity_id']))
return
rsp = send_message('read-model', 'get_entity', {
'name': 'customer',
'id': cart['customer_id']
})
customer = rsp['result']
if not customer:
logging.error('could not find customer {} for cart {}'.format(
cart['customer_id'], cart['entity_id']))
return
msg = """Dear {}!
We've just received € {} from you, thank you for your transfer.
Cheers""".format(customer['name'], billing['amount'])
send_message_async('mail-service', 'send', {
"to": customer['email'],
"msg": msg
})
def _send_message(_service_name, _func_name, _add_params=None, _async=False):
"""
Helper function to send a message to a service.
:param _service_name: The name of the service to call.
:param _func_name: The name of the function to call.
:param _add_params: A dict with optional additional parameters.
:param _async: Boolean indicating asynchronous communication.
:return: A dict with the result response, or a message ID if :param _async: is True.
"""
params = {}
if request.data:
params = json.loads(request.data)
if _add_params:
params.update(_add_params)
if _async:
return {
"result": send_message_async(_service_name, _func_name, params)
}
return send_message(_service_name, _func_name, params)