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service.py
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service.py
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"""
byceps.services.shop.order.email.service
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Notification e-mails about shop orders
:Copyright: 2006-2020 Jochen Kupperschmidt
:License: Modified BSD, see LICENSE for details.
"""
from dataclasses import dataclass
import os.path
from typing import Any, Dict, Optional
from flask import current_app
from jinja2 import FileSystemLoader
from .....services.email import service as email_service
from .....services.email.transfer.models import Message, Sender
from .....services.shop.order import service as order_service
from .....services.shop.order.transfer.models import Order, OrderID
from .....services.shop.shop import service as shop_service
from .....services.snippet import service as snippet_service
from .....services.snippet.service import SnippetNotFound
from .....services.snippet.transfer.models import Scope
from .....util.money import format_euro_amount
from .....util.templatefilters import utc_to_local_tz
from .....util.templating import create_sandboxed_environment, load_template
from ...shop.transfer.models import ShopID
@dataclass(frozen=True)
class OrderEmailData:
order: Order
email_config_id: str
orderer_screen_name: str
orderer_email_address: str
def send_email_for_incoming_order_to_orderer(order_id: OrderID) -> None:
data = _get_order_email_data(order_id)
message = _assemble_email_for_incoming_order_to_orderer(data)
_send_email(message)
def send_email_for_canceled_order_to_orderer(order_id: OrderID) -> None:
data = _get_order_email_data(order_id)
message = _assemble_email_for_canceled_order_to_orderer(data)
_send_email(message)
def send_email_for_paid_order_to_orderer(order_id: OrderID) -> None:
data = _get_order_email_data(order_id)
message = _assemble_email_for_paid_order_to_orderer(data)
_send_email(message)
def _assemble_email_for_incoming_order_to_orderer(
data: OrderEmailData
) -> Message:
order = data.order
subject = f'Deine Bestellung ({order.order_number}) ist eingegangen.'
template_name = 'order_placed.txt'
template_context = _get_template_context(data)
template_context['payment_instructions'] = _get_payment_instructions(order)
recipient_address = data.orderer_email_address
return _assemble_email_to_orderer(
subject,
template_name,
template_context,
data.email_config_id,
recipient_address,
)
def _get_payment_instructions(order: Order) -> str:
fragment = _get_snippet_body(order.shop_id, 'email_payment_instructions')
template = load_template(fragment)
return template.render(order_number=order.order_number)
def _assemble_email_for_canceled_order_to_orderer(
data: OrderEmailData
) -> Message:
subject = (
f'\u274c Deine Bestellung ({data.order.order_number}) '
f'wurde storniert.'
)
template_name = 'order_canceled.txt'
template_context = _get_template_context(data)
recipient_address = data.orderer_email_address
return _assemble_email_to_orderer(
subject,
template_name,
template_context,
data.email_config_id,
recipient_address,
)
def _assemble_email_for_paid_order_to_orderer(data: OrderEmailData) -> Message:
subject = (
f'\u2705 Deine Bestellung ({data.order.order_number}) '
f'ist bezahlt worden.'
)
template_name = 'order_paid.txt'
template_context = _get_template_context(data)
recipient_address = data.orderer_email_address
return _assemble_email_to_orderer(
subject,
template_name,
template_context,
data.email_config_id,
recipient_address,
)
def _get_order_email_data(order_id: OrderID) -> OrderEmailData:
"""Collect data required for an order e-mail template."""
order_entity = order_service.find_order(order_id)
order = order_entity.to_transfer_object()
shop = shop_service.get_shop(order.shop_id)
placed_by = order_entity.placed_by
return OrderEmailData(
order=order,
email_config_id=shop.email_config_id,
orderer_screen_name=placed_by.screen_name,
orderer_email_address=placed_by.email_address,
)
def _get_template_context(order_email_data: OrderEmailData) -> Dict[str, Any]:
"""Collect data required for an order e-mail template."""
footer = _get_footer(order_email_data.order)
return {
'order': order_email_data.order,
'orderer_screen_name': order_email_data.orderer_screen_name,
'footer': footer,
}
def _get_footer(order: Order) -> str:
fragment = _get_snippet_body(order.shop_id, 'email_footer')
template = load_template(fragment)
return template.render()
def _assemble_email_to_orderer(
subject: str,
template_name: str,
template_context: Dict[str, Any],
email_config_id: str,
recipient_address: str,
) -> Message:
"""Assemble an email message with the rendered template as its body."""
sender = _get_sender_address(email_config_id)
body = _render_template(template_name, **template_context)
recipients = [recipient_address]
return Message(sender, recipients, subject, body)
def _get_sender_address(email_config_id: str) -> Optional[Sender]:
config = email_service.find_config(email_config_id)
if not config:
current_app.logger.warning(
'No e-mail sender configured for ID "%s".', email_config_id
)
return config.sender
def _get_snippet_body(shop_id: ShopID, name: str) -> str:
scope = Scope('shop', str(shop_id))
version = snippet_service.find_current_version_of_snippet_with_name(
scope, name
)
if not version:
raise SnippetNotFound(scope, name)
return version.body
def _render_template(name: str, **context: Dict[str, Any]) -> str:
templates_path = os.path.join(
current_app.root_path, 'services/shop/order/email/templates'
)
loader = FileSystemLoader(templates_path)
env = create_sandboxed_environment(loader=loader)
env.filters['format_euro_amount'] = format_euro_amount
env.filters['utc_to_local_tz'] = utc_to_local_tz
template = env.get_template(name)
return template.render(**context)
def _send_email(message: Message) -> None:
email_service.enqueue_message(message)