✨ feat(i18n): implement pluralization logic (#277)
Co-authored-by: welpo <welpo@users.noreply.github.com>main
Mohammed Alotaibi
1 year ago
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{% macro translate(key, language_strings="", default="") %}
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{{- language_strings[key] | default(value=default) | safe -}}
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{#- Dynamically selects the appropriate translation key based on the provided `number` and `lang` context.
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If a `number` is provided, the macro will attempt to pluralize the translation key based on the language's rules.
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Parameters:
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- `key`: The base key for the translation string, matching the i18n files. Example: `results` to get `zero_results`, `one_results`, `many_results`, etc.
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- `number`: Optional. The numerical value associated with the key.
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- `language_strings`: A dictionary containing the translation strings.
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- `default`: A default string to use if no translation is found for the key.
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- `replace`: Optional. If `true`, the macro will replace the `$NUMBER` placeholder in the translation string with the provided `number`.
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The macro supports special pluralization rules for:
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- Arabic (`ar`): Has unique forms for zero, one, two, few, and many.
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- Slavic languages: Pluralization depends on the last digit of the number, with exceptions for numbers ending in 11-14.
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NOTE: If the logic for pluralization is modified, it needs to be replicated on the JavaScript search.
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Files: static/js/searchElasticlunr.js and its minified version at static/js/searchElasticlunr.min.js
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Function name: getPluralizationKey -#}
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{% macro translate(key, number=-1, language_strings="", default="", replace=true) %}
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{%- set slavic_plural_languages = ["uk", "be", "bs", "hr", "ru", "sr"] -%}
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{%- set key_prefix = "" -%}
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{#- `zero_` and `one_` are common cases. We handle "many" (plural) later, after language-specific pluralization -#}
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{%- if number == 0 -%}
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{%- set key_prefix = "zero_" -%}
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{%- elif number == 1 -%}
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{%- set key_prefix = "one_" -%}
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{%- endif -%}
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{#- Pluralization -#}
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{%- if number != -1 and key_prefix == "" -%}
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{#- Arabic -#}
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{%- if lang == "ar" -%}
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{%- set modulo = number % 100 -%}
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{%- if number == 2 -%}
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{%- set key_prefix = "two_" -%}
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{%- elif modulo >= 3 and modulo <= 10 -%}
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{%- set key_prefix = "few_" -%}
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{%- else -%}
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{%- set key_prefix = "many_" -%}
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{%- endif -%}
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{#- Slavic languages like Russian or Ukrainian -#}
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{%- elif lang in slavic_plural_languages -%}
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{%- set modulo10 = number % 10 -%}
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{%- set modulo100 = number % 100 -%}
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{%- if modulo10 == 1 and modulo100 != 11 -%}
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{%- set key_prefix = "one_" -%}
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{%- elif modulo10 >= 2 and modulo10 <= 4 -%}
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{%- if modulo100 >= 12 and modulo100 <= 14 -%}
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{%- set key_prefix = "many_" -%}
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{%- else -%}
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{%- set key_prefix = "few_" -%}
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{%- endif -%}
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{%- else -%}
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{%- set key_prefix = "many_" -%}
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{%- endif -%}
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{%- else -%}
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{#- Default pluralization -#}
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{#- Zero and one are already handled -#}
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{%- set key_prefix = "many_" -%}
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{%- endif -%}
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{%- endif -%}
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{#- Translated string -#}
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{%- set final_key = key_prefix ~ key -%}
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{%- set translated_text = language_strings[final_key] | default(value=default) | safe -%}
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{#- Replace $NUMBER with the number -#}
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{%- if replace -%}
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{%- set translated_text = translated_text | replace(from="$NUMBER", to=number | as_str) -%}
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{%- endif -%}
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{{- translated_text -}}
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{% endmacro %}
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