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jinja2: add 'tn' filter, a numerical translation

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The possibly plural version of `tr`, `tn` provides a way to translate
strings into singular or plural form based on a given integer
being 1 or not 1.

Example use:

```
{{ 1 | tn("%d package found.", "%d packages found.") | format(1) }}
```

Signed-off-by: Kevin Morris <kevr@0cost.org>
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Kevin Morris 2021-08-20 16:29:04 -07:00
parent 1c26ce52a5
commit 45fbf214b4
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3 changed files with 32 additions and 1 deletions
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18
aurweb/l10n.py
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@ -93,3 +93,21 @@ def tr(context: typing.Any, value: str):
""" A translation filter; example: {{ "Hello" | tr("de") }}. """
_ = get_translator_for_request(context.get("request"))
return _(value)
@pass_context
def tn(context: typing.Dict[str, typing.Any], count: int,
singular: str, plural: str) -> str:
""" A singular and plural translation filter.
Example:
{{ some_integer | tn("singular %d", "plural %d") }}
:param context: Response context
:param count: The number used to decide singular or plural state
:param singular: The singular translation
:param plural: The plural translation
:return: Translated string
"""
gettext = get_raw_translator_for_request(context.get("request"))
return gettext.ngettext(singular, plural, count)