feat: Translation preparation for fundraising app

[marksweb]

This adds translations tags to the fundraising app as suggested in #1648

[bmispelon]

The plaintext files need to be handled a bit differently since spaces and newlines there are significant (unlike in HTML).

Localization is hard work, isn't it? 😁

[bmispelon]

Out of scope for this PR, but I wonder if this is a problem with a known solution:

with the current translation infrastructure, translators have the power to do some significant (and potentially malicious) modifications to the HTML like changing the href or even injecting a <script> tag.
Are there tools that can help with that, or is that something that needs to be verified by hand for each language/string?

[marksweb]

@bmispelon Ok, I think I've addressed all the issues here - thanks for another review!

[bmispelon]

There's still an issue with plaintext templates: the { %blocktranslate %} are inserting extra new lines.

Here's the code I used to test this:

from django.template import loader
print(loader.get_template("fundraising/email/payment_failed.txt").render({"donation":{"donor": {"pk": 1234, "name_with_fallback": "TEST"}}}))

If you run this code on main vs. marksweb:feat/i18n-fundraising/1648 you'll see extra blank lines between paragraphs. Ideally, the output should be identical.

[marksweb]

@bmispelon Ah yes, apologies - didn't realise that blocktranslate created space like this. 🤦🏼

I've corrected the 3 email templates - though we are adding a blank line at the end of files so there is that still.

>>> from django.template import loader
>>> print(loader.get_template("fundraising/email/payment_failed.txt").render({"donation":{"donor": {"pk": 1234, "name_with_fallback": "TEST"}}}))
Hi TEST,

This is to let you know that payment for your recurring donation to the Django Software Foundation has failed.
This might be because your payment card has expired.

Please go to http://www.djangoproject.localhost:8000/fundraising/manage-donations/1234/ to add a new card. We won't be able to take any payments in the mean time.

Thanks very much for your support.

Regards,
Django Software Foundation

>>> print(loader.get_template("fundraising/email/subscription_cancelled.txt").render({"donation":{"donor": {"pk": 1234, "name_with_fallback": "TEST"}}}))
Hi TEST,

This is to let you know that your recurring payment to the Django Software
Foundation has been cancelled. No further payments will be made.

If you didn't intend to do this, please go back to the fundraising page and
recreate your payment subscription:
http://www.djangoproject.localhost:8000/fundraising/
Thanks very much for your support.

Regards,
Django Software Foundation

>>> print(loader.get_template("fundraising/email/thank-you.html").render({"donation":{"donor": {"pk": 1234,}}}))
Hello!

Thank you for making a donation to the Django Software Foundation.

Your support is invaluable to continue the rapid development of Django and helps the Django Fellowship program in particular.

If you want to change information about your donation, you can do so by accessing the link below:

http://www.djangoproject.localhost:8000/fundraising/manage-donations/1234/

Best regards,
Django Software Foundation

[bmispelon]

Clever use of spaceless 👍🏻

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ TypeError: 'bool' object is not callable fundraising.views.receive_webhook View Issue

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