Allow template syntax in event text (Z#23140046) (#3815)

* remove duplicate context generation

* allow text templates in frontpage_text

* refactor: move placeholder functionality to separate file

* fix wrong class name, code style

* update year in license header

* undo license header update

* use new function name

* render only the placeholders that are actually used in the message

* refactoring

* add str(...) call

* Update doc/development/api/placeholder.rst

Co-authored-by: Raphael Michel <michel@rami.io>

* rename register_mail_placeholders to register_template_placeholders
(deprecate old name)

* isort

* add signals to docs

---------

Co-authored-by: Raphael Michel <michel@rami.io>
This commit is contained in:
Mira
2024-02-06 11:32:03 +01:00
committed by GitHub
parent 45ac391998
commit bac673f3ab
13 changed files with 654 additions and 582 deletions

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@@ -13,7 +13,8 @@ Core
.. automodule:: pretix.base.signals
:members: periodic_task, event_live_issues, event_copy_data, email_filter, register_notification_types, notification,
item_copy_data, register_sales_channels, register_global_settings, quota_availability, global_email_filter,
register_ticket_secret_generators, gift_card_transaction_display
register_ticket_secret_generators, gift_card_transaction_display,
register_text_placeholders, register_mail_placeholders
Order events
""""""""""""

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@@ -1,10 +1,11 @@
.. highlight:: python
:linenothreshold: 5
Writing an e-mail placeholder plugin
====================================
Writing a template placeholder plugin
=====================================
An email placeholder is a dynamic value that pretix users can use in their email templates.
A template placeholder is a dynamic value that pretix users can use in their email templates and in other
configurable texts.
Please read :ref:`Creating a plugin <pluginsetup>` first, if you haven't already.
@@ -12,31 +13,31 @@ Placeholder registration
------------------------
The placeholder API does not make a lot of usage from signals, however, it
does use a signal to get a list of all available email placeholders. Your plugin
should listen for this signal and return an instance of a subclass of ``pretix.base.email.BaseMailTextPlaceholder``:
does use a signal to get a list of all available placeholders. Your plugin
should listen for this signal and return an instance of a subclass of ``pretix.base.services.placeholders.BaseTextPlaceholder``:
.. code-block:: python
from django.dispatch import receiver
from pretix.base.signals import register_mail_placeholders
from pretix.base.signals import register_text_placeholders
@receiver(register_mail_placeholders, dispatch_uid="placeholder_custom")
def register_mail_renderers(sender, **kwargs):
from .email import MyPlaceholderClass
@receiver(register_text_placeholders, dispatch_uid="placeholder_custom")
def register_placeholder_renderers(sender, **kwargs):
from .placeholders import MyPlaceholderClass
return MyPlaceholder()
Context mechanism
-----------------
Emails are sent in different "contexts" within pretix. For example, many emails are sent in the
the context of an order, but some are not, such as the notification of a waiting list voucher.
Templates are used in different "contexts" within pretix. For example, many emails are rendered from
templates in the context of an order, but some are not, such as the notification of a waiting list voucher.
Not all placeholders make sense in every email, and placeholders usually depend some parameters
Not all placeholders make sense everywhere, and placeholders usually depend on some parameters
themselves, such as the ``Order`` object. Therefore, placeholders are expected to explicitly declare
what values they depend on and they will only be available in an email if all those dependencies are
what values they depend on and they will only be available in a context where all those dependencies are
met. Currently, placeholders can depend on the following context parameters:
* ``event``
@@ -51,7 +52,7 @@ There are a few more that are only to be used internally but not by plugins.
The placeholder class
---------------------
.. class:: pretix.base.email.BaseMailTextPlaceholder
.. class:: pretix.base.services.placeholders.BaseTextPlaceholder
.. autoattribute:: identifier
@@ -77,7 +78,15 @@ functions:
.. code-block:: python
placeholder = SimpleFunctionalMailTextPlaceholder(
placeholder = SimpleFunctionalTextPlaceholder(
'code', ['order'], lambda order: order.code, sample='F8VVL'
)
Signals
-------
.. automodule:: pretix.base.signals
:members: register_text_placeholders
.. automodule:: pretix.base.signals
:members: register_mail_placeholders