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{#- Dynamically selects the appropriate translation key based on the provided `number` and `lang` context.
If a `number` is provided, the macro will attempt to pluralize the translation key based on the language's rules.
Parameters:
- `key`: The base key for the translation string, matching the i18n files. Example: `results` to get `zero_results`, `one_results`, `many_results`, etc.
- `number`: Optional. The numerical value associated with the key.
- `language_strings`: A dictionary containing the translation strings.
- `default`: A default string to use if no translation is found for the key.
- `replace`: Optional. If `true`, the macro will replace the `$NUMBER` placeholder in the translation string with the provided `number`.
The macro supports special pluralization rules for:
- Arabic (`ar`): Has unique forms for zero, one, two, few, and many.
- Slavic languages: Pluralization depends on the last digit of the number, with exceptions for numbers ending in 11-14.
NOTE: If the logic for pluralization is modified, it needs to be replicated on the JavaScript search.
Files: static/js/searchElasticlunr.js and its minified version at static/js/searchElasticlunr.min.js
Function name: getPluralizationKey -#}
{% macro translate(key, number=-1, language_strings="", default="", replace=true) %}
{%- set slavic_plural_languages = ["uk", "be", "bs", "hr", "ru", "sr"] -%}
{%- set key_prefix = "" -%}
{#- `zero_` and `one_` are common cases. We handle "many" (plural) later, after language-specific pluralization -#}
{%- if number == 0 -%}
{%- set key_prefix = "zero_" -%}
{%- elif number == 1 -%}
{%- set key_prefix = "one_" -%}
{%- endif -%}
{#- Pluralization -#}
{%- if number != -1 and key_prefix == "" -%}
{#- Arabic -#}
{%- if lang == "ar" -%}
{%- set modulo = number % 100 -%}
{%- if number == 2 -%}
{%- set key_prefix = "two_" -%}
{%- elif modulo >= 3 and modulo <= 10 -%}
{%- set key_prefix = "few_" -%}
{%- else -%}
{%- set key_prefix = "many_" -%}
{%- endif -%}
{#- Slavic languages like Russian or Ukrainian -#}
{%- elif lang in slavic_plural_languages -%}
{%- set modulo10 = number % 10 -%}
{%- set modulo100 = number % 100 -%}
{%- if modulo10 == 1 and modulo100 != 11 -%}
{%- set key_prefix = "one_" -%}
{%- elif modulo10 >= 2 and modulo10 <= 4 -%}
{%- if modulo100 >= 12 and modulo100 <= 14 -%}
{%- set key_prefix = "many_" -%}
{%- else -%}
{%- set key_prefix = "few_" -%}
{%- endif -%}
{%- else -%}
{%- set key_prefix = "many_" -%}
{%- endif -%}
{%- else -%}
{#- Default pluralization -#}
{#- Zero and one are already handled -#}
{%- set key_prefix = "many_" -%}
{%- endif -%}
{%- endif -%}
{#- Translated string -#}
{%- set final_key = key_prefix ~ key -%}
{%- set translated_text = language_strings[final_key] | default(value=default) | safe -%}
{#- Replace $NUMBER with the number -#}
{%- if replace -%}
{%- set translated_text = translated_text | replace(from="$NUMBER", to=number | as_str) -%}
{%- endif -%}
{{- translated_text -}}
{% endmacro %}
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